2.1.1 Supplemental Data Summary - A4155 Flowing Springs

Combined Option 1 & 2 Regrade and Gravity Wall Strategic Network • "The only impact for local service buses would be on the A4155: Carousel buses X80 service Monday-Saturday. Buses would need to divert via Binfield Heath/Dunsden Green" - Chris Spry's comments. •" Regarding the Playhatch area we have ATC 187 just south of the roundabout and have attached the weeks’ worth of flows from 2016 (AADT = 17603). North of the roundabout in 2010 we carried out a speed survey and the flows from this provide an AADT = 8359. Further along the A4155 just south of Henley we have a 2016 AADT = 10825. There are plenty of opportunities to loose vehicles between these two count sites (including Lower Shiplake) so the 2010 AADT is possibly a little low compared to what a 2016 survey would show but overall probably not too far out." - Richard Bowman's comments • "This is a significant route and a link road between the bridges crossing the river Thames particularly in this area that links to the Playhatch bridge on the B478 which takes large volumes of peak time traffic across the river Thames, if the A4155 were to close it would cause significant traffic problems in Henley and on Henley bridge in particular as well as having a major impact on the two river bridges in Reading. It’s closure would severely impact on bus routes in the area. " - Bob Eeles comments • 8000 AADT in 2015. See table 2.1.2; 2.1.3

Strategic Commercial – Impact • "A4155 – I am finding it difficult to see the location plan so cannot be sure of the to businesses, schools and impact of the closure. We have a number of routes that may use this as an utilities approach road to start school routes (2203, 2204, 2251 and 2259) that may be affected and need to allow additional time and mileage on their journey " - Anita Syphas's comments. • Utilities in the vicinity: Most utilities are on the other side of the verge. These utilities cable are: BT cables, SSE HV overhead cable cable.

Claims – Claims, as a result of; damage to property, loss of business etc 4 no. claims has been recorded in year 2014-2016. See table 2.1.4 Land access

Proposals and preferred option Prefered option Deliverability of estimate of the preferred construction £536,900 option Programme 12wks TM road closure TM impact Long distance diversion route and potential weight restriction required instrumentation installed Without remedial works, 4 no. monitoring is required; With construction goes ahead 2no. monitoring is required. Site monitoring TM 1 day Traffic light/Stop&Go per monitoring Cost of site monitoring TM £2400 without remedial works; £1200 without remedial works Stuff cost (average of year 15-16 & 16-17) £21,538.00 Skanska & Atkins combined staff £18,509.00 cost year 15-16 Skanska & Atkins combined staff £24,567.00 cost year 16-17 2.1.2 Supplemental Data - A4155 Flowing Springs Site No. 00000187 Site Ref. A4155 0187 Grid Ref. 473936,175824 A4155 SOUTH WEST OF B478 Vehicle Count Summary From 14/04/2016 To 21/04/2016 Channel: Westbound

DayAv DayAv Monday Tuesday Wednesday Thursday Friday Saturday Sunday 5 ‐ 7 ‐ 00:00 31 29 40 22 45 74 92 33 48 01:00 18 18 14 14 26 42 51 18 26 02:00 9 7 7 812 21 37 9 14 03:00 9 1316 10 13 24 21 12 15 04:00 15 22 16 16 17 17 20 17 18 05:00 36 40 42 48 43 31 20 42 37 06:00 177 202 177 182 154 78 37 178 144 07:00 635 622 648 641 589 213 92 627 491 08:00 637 657 578 619 617 340 136 622 512 09:00 558 631 572 550 531 460 292 568 513 10:00 472 523 495 524 517 582 444 506 508 11:00 473 553 506 503 528 647 555 513 538 12:00 493 559 579 518 585 638 624 547 571 13:00 533 563 584 539 555 670 591 555 576 14:00 598 616 622 610 667 632 626 623 624 15:00 643 650 665 689 655 583 618 660 643 16:00 877 892 892 883 823 565 602 873 791 17:00 933 937 983 952 901 540 487 941 819 18:00 878 884 853 858 870 480 398 869 746 19:00 419 566 534 537 463 365 320 504 458 20:00 238 280 331 302 273 196 216 285 262 21:00 232 257 281 225 215 176 162 242 221 22:00 154 223 183 266 241 214 112 213 199 23:00 59 71 88 84 132 149 55 87 91

Total 12H(7‐19) 7730 8087 7977 7886 7838 6350 5465 7904 7333 16H(6‐22) 8796 9392 9300 9132 8943 7165 6200 9113 8418 18H(6‐24) 9009 9686 9571 9482 9316 7528 6367 9413 8708 24H(0‐24) 9127 9815 9706 9600 9472 7737 6608 9544 8866

AM Peak 08:00 08:00 07:00 07:00 08:00 11:00 11:00 07:00 11:00 637 657 648 641 617 647 555 627 538

PM Peak 17:00 17:00 17:00 17:00 17:00 13:00 14:00 17:00 17:00 933 937 983 952 901 670 626 941 819

Vehicle Data Analyser Professional R2 08/12/2016

Site No. 00000187 Site Ref. A4155 0187 Grid Ref. 473936,175824 A4155 SOUTH WEST OF B478 Vehicle Count Summary From 14/04/2016 To 21/04/2016 Channel: Eastbound

DayAv DayAv ‐ ‐ Friday Sunday 7 Monday Tuesday Wednesday Thursday Saturday 5 00:00 17 22 25 18 35 50 65 23 33 01:00 713 17 15 20 3742 14 22 02:00 6 4 11 7 8 19 38 7 13 03:00 10 12 11 15 14 29 18 12 16 04:00 29 24 14 22 23 16 16 22 21 05:00 102 99 105 93 84 44 27 97 79 06:00 429 450 421 441 396 94 58 427 327 07:00 1075 1124 1110 1092 1010 192 101 1082 815 08:00 886 866 923 915 830 384 186 884 713 09:00 655 632 591 621 638 521 392 627 579 10:00 445 502 497 507 503 572 541 491 510 11:00 497 506 524 457 526 610 601 502 532 12:00 487 569 511 520 531 614 701 524 562 13:00 471 497 596 544 583 609 673 538 568 14:00 550 537 593 568 558 623 594 561 575 15:00 577 571 654 647 583 581 514 606 590 16:00 682 730 705 712 659 575 516 698 654 17:00 613 709 634 680 647 550 408 657 606 18:00 565 618 617 654 616 429 364 614 552 19:00 413 422 431 422 423 334 278 422 389 20:00 225 231 266 259 231 172 193 242 225 21:00 148 212 216 172 186 166 112 187 173 22:00 81 179 99 146 140 128 83 129 122 23:00 44 56 62 61 84 107 34 61 64 Total 12H(7‐19) 7503 7861 7955 7917 7684 6260 5591 7784 7253 16H(6‐22) 8718 9176 9289 9211 8920 7026 6232 9063 8367 18H(6‐24) 8843 9411 9450 9418 9144 7261 6349 9253 8554 24H(0‐24) 9014 9585 9633 9588 9328 7456 6555 9430 8737

AM Peak 07:00 07:00 07:00 07:00 07:00 11:00 11:00 07:00 07:00 1075 1124 1110 1092 1010 610 601 1082 815

PM Peak 16:00 16:00 16:00 16:00 16:00 14:00 12:00 16:00 16:00 682 730 705 712 659 623 701 698 654

Vehicle Data Analyser Professional R2 08/12/2016

Site No. 00000187 Site Ref. A4155 0187 Grid Ref. 473936,175824 A4155 SOUTH WEST OF B478 Vehicle Count Summary From 14/04/2016 To 21/04/2016 Channel: Total Flow

DayAv DayAv ‐ ‐ Friday Sunday 7 Monday Tuesday Wednesday Thursday Saturday 5 00:00 48 51 65 40 80 124 157 57 81 01:00 25 31 31 29 46 79 93 32 48 02:00 15 11 18 15 20 40 75 16 28 03:00 19 25 27 25 27 53 39 25 31 04:00 44 46 30 38 40 33 36 40 38 05:00 138 139 147 141 127 75 47 138 116 06:00 606 652 598 623 550 172 95 606 471 07:00 1710 1746 1758 1733 1599 405 193 1709 1306 08:00 1523 1523 1501 1534 1447 724 322 1506 1225 09:00 1213 1263 1163 1171 1169 981 684 1196 1092 10:00 917 1025 992 1031 1020 1154 985 997 1018 11:00 970 1059 1030 960 1054 1257 1156 1015 1069 12:00 980 1128 1090 1038 1116 1252 1325 1070 1133 13:00 1004 1060 1180 1083 1138 1279 1264 1093 1144 14:00 1148 1153 1215 1178 1225 1255 1220 1184 1199 15:00 1220 1221 1319 1336 1238 1164 1132 1267 1233 16:00 1559 1622 1597 1595 1482 1140 1118 1571 1445 17:00 1546 1646 1617 1632 1548 1090 895 1598 1425 18:00 1443 1502 1470 1512 1486 909 762 1483 1298 19:00 832 988 965 959 886 699 598 926 847 20:00 463 511 597 561 504 368 409 527 488 21:00 380 469 497 397 401 342 274 429 394 22:00 235 402 282 412 381 342 195 342 321 23:00 103 127 150 145 216 256 89 148 155

Total 12H(7‐19) 15233 15948 15932 15803 15522 12610 11056 15688 14586 16H(6‐22) 17514 18568 18589 18343 17863 14191 12432 18175 16786 18H(6‐24) 17852 19097 19021 18900 18460 14789 12716 18666 17262 24H(0‐24) 18141 19400 19339 19188 18800 15193 13163 18974 17603

AM Peak 07:00 07:00 07:00 07:00 07:00 11:00 11:00 07:00 07:00 1710 1746 1758 1733 1599 1257 1156 1709 1306

PM Peak 16:00 17:00 17:00 17:00 17:00 13:00 12:00 17:00 16:00 1559 1646 1617 1632 1548 1279 1325 1598 1445

Vehicle Data Analyser Professional R2 08/12/2016 2.1.3 Supplemental Data - A4155 Flowing Springs Site No. 00010040 Site Ref. 00010040 Grid Ref. 474529,176619 Playhatch, A4155 Span Hill South Of Spring Lane. Vehicle Count Summary From 17/05/2010 To 24/05/2010 Channel: Northbound

DayAv DayAv ‐ ‐ Monday Tuesday Wednesday Thursday Friday Saturday Sunday 5 7 00:00 11 15 19 24 19 32 50 18 24 01:00 75 5 8 13 20 23 812 02:00 56 11 66 19 16 710 03:00 3 4 4 3 1 7 9 3 4 04:00 1412 67 7 14 59 9 05:00 38 42 34 46 38 23 13 40 33 06:00 110 105 112 99 101 41 26 105 85 07:00 529 565 508 378 374 149 56 471 366 08:00 614 727 617 545 504 238 101 601 478 09:00 311 312 328 338 257 246 187 309 283 10:00 262 261 267 267 277 310 244 267 270 11:00 246 253 265 285 274 347 291 265 280 12:00 281 279 275 283 325 407 415 289 324 13:00 263 286 292 273 286 385 413 280 314 14:00 251 267 282 310 314 345 315 285 298 15:00 274 295 270 284 318 348 269 288 294 16:00 293 294 304 278 325 315 236 299 292 17:00 335 333 292 335 318 245 211 323 296 18:00 355 350 333 353 312 298 220 341 317 19:00 208 224 250 235 285 248 175 240 232 20:00 118 164 149 180 139 148 140 150 148 21:00 76 95 101 82 157 94 102 102 101 22:00 67 72 88 74 93 79 80 79 79 23:00 28 37 38 51 44 79 36 40 45

Total 12H(7‐19) 4014 4222 4033 3929 3884 3633 2958 4016 3810 16H(6‐22) 4526 4810 4645 4525 4566 4164 3401 4614 4377 18H(6‐24) 4621 4919 4771 4650 4703 4322 3517 4733 4500 24H(0‐24) 4699 5003 4850 4744 4787 4437 3633 4817 4593

AM Peak 08:00 08:00 08:00 08:00 08:00 11:00 11:00 08:00 08:00 614 727 617 545 504 347 291 601 478

PM Peak 18:00 18:00 18:00 18:00 16:00 12:00 12:00 18:00 12:00 355 350 333 353 325 407 415 341 324

Vehicle Data Analyser Professional R2 08/12/2016

Site No. 00010040 Site Ref. 00010040 Grid Ref. 474529,176619 Playhatch, A4155 Span Hill South Of Spring Lane. Vehicle Count Summary From 17/05/2010 To 24/05/2010 Channel: Southbound

DayAv DayAv ‐ ‐ Monday Tuesday Wednesday Thursday Friday Saturday Sunday 5 7 00:00 813 22 1821 43 74 16 28 01:00 6 8 6 8 1419 32 8 13 02:00 5 8 5 4 825 28 6 12 03:00 2 2 4 5 910 20 4 7 04:00 10 4 8 11 6 17 9 8 9 05:00 14 16 16 18 19 17 8 17 15 06:00 61 78 68 61 57 24 16 65 52 07:00 219 228 242 222 198 75 43 222 175 08:00 239 243 247 246 255 157 60 246 207 09:00 235 248 232 228 235 237 120 236 219 10:00 223 229 240 240 234 256 201 233 232 11:00 217 219 210 214 219 242 231 216 222 12:00 231 251 233 244 253 256 240 242 244 13:00 240 258 283 272 301 289 192 271 262 14:00 248 262 269 243 263 258 241 257 255 15:00 278 303 273 299 327 303 256 296 291 16:00 325 342 357 337 355 269 265 343 321 17:00 360 377 337 370 350 267 232 359 328 18:00 314 321 336 321 285 234 212 315 289 19:00 191 187 184 200 199 191 168 192 189 20:00 133 124 143 154 137 109 145 138 135 21:00 96 91 122 118 116 90 108 109 106 22:00 60 90 96 129 114 104 83 98 97 23:00 42 33 47 62 79 105 27 53 56

Total 12H(7‐19) 3129 3281 3259 3236 3275 2843 2293 3236 3045 16H(6‐22) 3610 3761 3776 3769 3784 3257 2730 3740 3527 18H(6‐24) 3712 3884 3919 3960 3977 3466 2840 3890 3680 24H(0‐24) 3757 3935 3980 4024 4054 3597 3011 3950 3765

AM Peak 08:00 09:00 08:00 08:00 08:00 10:00 11:00 08:00 10:00 239 248 247 246 255 256 231 246 232

PM Peak 17:00 17:00 16:00 17:00 16:00 15:00 16:00 17:00 17:00 360 377 357 370 355 303 265 359 328

Vehicle Data Analyser Professional R2 08/12/2016

Site No. 00010040 Site Ref. 00010040 Grid Ref. 474529,176619 Playhatch, A4155 Span Hill South Of Spring Lane. Vehicle Count Summary From 17/05/2010 To 24/05/2010 Channel: Total Flow

DayAv DayAv ‐ ‐ Monday Tuesday Wednesday Thursday Friday Saturday Sunday 5 7 00:00 19 28 41 42 40 75 124 34 53 01:00 13 13 11 16 27 39 55 16 25 02:00 10 14 16 10 14 44 44 13 22 03:00 5 6 8 810 17 29 7 12 04:00 24 16 14 18 13 31 14 17 19 05:00 52 58 50 64 57 40 21 56 49 06:00 171 183 180 160 158 65 42 170 137 07:00 748 793 750 600 572 224 99 693 541 08:00 853 970 864 791 759 395 161 847 685 09:00 546 560 560 566 492 483 307 545 502 10:00 485 490 507 507 511 566 445 500 502 11:00 463 472 475 499 493 589 522 480 502 12:00 512 530 508 527 578 663 655 531 568 13:00 503 544 575 545 587 674 605 551 576 14:00 499 529 551 553 577 603 556 542 553 15:00 552 598 543 583 645 651 525 584 585 16:00 618 636 661 615 680 584 501 642 614 17:00 695 710 629 705 668 512 443 681 623 18:00 669 671 669 674 597 532 432 656 606 19:00 399 411 434 435 484 439 343 433 421 20:00 251 288 292 334 276 257 285 288 283 21:00 172 186 223 200 273 184 210 211 207 22:00 127 162 184 203 207 183 163 177 176 23:00 70 70 85 113 123 184 63 92 101

Total 12H(7‐19) 7143 7503 7292 7165 7159 6476 5251 7252 6856 16H(6‐22) 8136 8571 8421 8294 8350 7421 6131 8354 7903 18H(6‐24) 8333 8803 8690 8610 8680 7788 6357 8623 8180 24H(0‐24) 8456 8938 8830 8768 8841 8034 6644 8767 8359 AM Peak 08:00 08:00 08:00 08:00 08:00 11:00 11:00 08:00 08:00 853 970 864 791 759 589 522 847 685

PM Peak 17:00 17:00 18:00 17:00 16:00 13:00 12:00 17:00 17:00 695 710 669 705 680 674 655 681 623

Vehicle Data Analyser Professional R2 08/12/2016 2.1.4 SupplementalData-A4155FlowingSprings 15-Jul-2016 11-Jul-2016 11-Jul-2016 09-May-2014 Inspected Date

330259 329554 329552 239829 Id 15-Jul-2016 11-Jul-2016 11-Jul-2016 12-May-2014 Created Date COMPLETE COMPLETED COMPLETED COMPLETED Status Code D 01-Aug-2016 11-Jul-2016 11-Jul-2016 10-May-2014 Date Completed PE INS PE PE Initiation Type 2 1A 1A 1A Priority MC MC MC MC Activity POT2 POT2 POT2 SPI2 Code HATCH RBT TO B478PLAY -SPRINGLANE Road Description NORTH HATCH RBT TO B478PLAY -SPRINGLANE NORTH HATCH RBT TO B478PLAY -SPRINGLANE NORTH HATCH RBT TO B478PLAY -SPRINGLANE NORTH Location roundabout towardsThe between thePlayhatch ooh A4155Playhatch- 260 A5 r/a byanarrowroadsignmap about 1/2milefromplayhatch a4155 comingfromhenley PLAY HATCHRBTNORTH pub -SPRINGLANETOB478 track lane,o/sFlowingSpring Lane, A4155SpanHillsingle from thejunctionwithSpring Map page260/B7:20maway pub, RG49RB track lane,o/sFlowingSpring Lane, A4155SpanHillsingle from thejunctionwithSpring Map page260/B7:20maway Flowing SpringPub Description orange pothole 1500x600x40marked IMF TMStopandGoedge boards required in red,TMtemporarydelay Pothole 500x400x80,marked require urgentatte size ofthepothole,saidit was reallyconcernedaboutthe on SpringLane.Thecustomer the junctiononA4155 from large pothole20meteraway delay boardsrequired. marked inred,TMtemporary Pothole 1000x900x100, URN 1800Dfc Diesel Spillage.Inc51516 Road Name 5/00310 31100A415 5/00310 31100A415 5/00310 31100A415 5/00310 31100A415 NULL required delay boards TM temporary marked inred, 500x400x80, Pothole NULL NULL Instr Defect Spec N N N N Superseded Flag

Easting SUM 474451.48 474637.36 474639.89 474266.07 Northing 176513.25 176741.00 176744.74 176174.93 SUM 2.1.5 Supplemental Data ‐ Flowing Springs Site No. 00010040 Site Ref. 00010040 Grid Ref. 474529,176619 Playhatch, A4155 Span Hill South Of Spring Lane. Vehicle Count Summary From 17/05/2010 To 24/05/2010 Channel: Northbound

AM Peak 08:00 08:00 08:00 08:00 08:00 11:00 11:00 08:00 08:00 614 727 617 545 504 347 291 601 478

PM Peak 18:00 18:00 18:00 18:00 16:00 12:00 12:00 18:00 12:00 355 350 333 353 325 407 415 341 324

Vehicle Data Analyser Professional R2 08/12/2016

Site No. 00010040 Site Ref. 00010040 Grid Ref. 474529,176619 Playhatch, A4155 Span Hill South Of Spring Lane. Vehicle Count Summary From 17/05/2010 To 24/05/2010 Channel: Southbound

AM Peak 08:00 09:00 08:00 08:00 08:00 10:00 11:00 08:00 10:00 239 248 247 246 255 256 231 246 232

PM Peak 17:00 17:00 16:00 17:00 16:00 15:00 16:00 17:00 17:00 360 377 357 370 355 303 265 359 328

Vehicle Data Analyser Professional R2 08/12/2016

Site No. 00010040 Site Ref. 00010040 Grid Ref. 474529,176619 Playhatch, A4155 Span Hill South Of Spring Lane. Vehicle Count Summary From 17/05/2010 To 24/05/2010 Channel: Total Flow

AM Peak 08:00 08:00 08:00 08:00 08:00 11:00 11:00 08:00 08:00 853 970 864 791 759 589 522 847 685

PM Peak 17:00 17:00 18:00 17:00 16:00 13:00 12:00 17:00 17:00 695 710 669 705 680 674 655 681 623

Vehicle Data Analyser Professional R2 08/12/2016 2.2.1 Supplemental Data Summary - Thames Park Rd

Combined Option

Gravity wall and 100mm conventional overlay Strategic Network • Re Thame park road B4012, closure of this road would have a significant impact on local traffic, this being a main route between the A40 and Thame town centre as well as an access road to all the industrial sites and businesses with in the local area. There are two reasonable alternative diversion routes if this road were to close - Robert Eeles comments. • AADT: 4468. See table 2.2.3 Strategic Commercial – Impact • "There isn’t any large school buses using this road" – Anita Syphas’ comments to businesses, schools and • Utilities in the vicinity: utilities o BT cables

Claims – Claims, as a result of; damage to property, loss of business etc 26 no. complains were recorded for year 2014-2016. See table 2.2.2 Land access Proposals and preferred option Prefered option Deliverability of estimate of the preferred construction £945,400 option Programme 12wks TM road closure TM impact instrumentation installed No site monitoring TM N/A Cost of site monitoring TM £0.00 Stuff cost (average of year 15-16 £1,619.00 Skanska & Atkins combined staff £1,989.00 cost year 15-16 Skanska & Atkins combined staff £1,249.00 cost year 16-17 2.2.2 SupplementalData-ThameParkRd 29-Jun-2015 27-Feb-2015 16-Oct-2014 20-Jun-2014 18-Apr-2014 10-Apr-2014 07-Apr-2014 07-Apr-2014 06-Apr-2014 21-Mar-2014 20-Feb-2014 20-Feb-2014 19-Feb-2014 19-Feb-2014 16-Jan-2014 Inspected Date

293659 278831 259924 245266 235985 234104 233609 233608 233562 231234 225715 225654 225458 225457 219775 Id 29-Jun-2015 27-Feb-2015 16-Oct-2014 20-Jun-2014 22-Apr-2014 10-Apr-2014 07-Apr-2014 07-Apr-2014 07-Apr-2014 21-Mar-2014 20-Feb-2014 20-Feb-2014 19-Feb-2014 19-Feb-2014 16-Jan-2014 Created Date

COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETE COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED Status Code D 29-Jun-2015 27-Feb-2015 15-Oct-2014 30-Jun-2014 18-Apr-2014 10-Apr-2014 16-Jun-2014 16-Jun-2014 06-Apr-2014 10-Apr-2014 20-Feb-2014 20-Feb-2014 20-Feb-2014 20-Feb-2014 17-Jan-2014 Date Completed INS PE F&F PE PE PE PE F&F F&F INS INS PE PE PE PE Initiation Type Priority 2 1A 2 2 2 1A 1A 2 2 1B 1B 1B 1A 1A 1A ty Activi MC MC S MC MC MC MC MC MC MC MC MC MC MC MC Code OBS2 CKI2 OBS2 POT2 POT2 POT2 DEB2 POT2 2 POC POT2 POT2 POT2 POT2 OBS2 SPI2 Road Description HOUSE TO STOLL CRICKET GRND TETSWORTH -W TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W HOUSE TO STOLL CRICKET GRND TETSWORTH -W Location ROAD B4012 THAMEPARK 147 F4 towards Thamemappage Road fromPostcombe OOH B4012ThamePark Road Thame ooh B4012ThamePark TOLL HOUSE CRICKET GRNDTOS TETSWORTH -W Musgrave covert- Thame~ passing Postcombe towards FIX***B4012~ gointfrom Park rdThame Os HideawayhseThame Thame parkrd OS hideawayhouse/ map page147F4 Park ThameRoad ooh B4012nearThame covert Thame, passingMusgrave Postcombe towards B4012, gointfrom Tetsworth B4012 towardsThame- Tetsworth B4012 ThameRoad thame thame roadb4012toward b4012 towardthame Thame ParkRoad Thame, nearThamePark, house beforetheoldToll Rd - B4012ThamePark OOH page 147F3 towards Postcombemap Thame Parkheading Road fromentranceof OOH B4012ThamePark Description Gully edgedefect pothole 1100x450x50mm carria Large deadinDeer Dfc INC57562URN164; to Thame URN 1064Dfc so itsmorevisibleInc51283 obscured andneedsmoving New roadlayoutsignis FIND &FIXExtra ph ph road Inc51164URN606Dfc where acarhascomeoffthe Diesel andmudontheroad cannot attend. to passthisARVashe bad pothole.?sentanemail Extension toHQ/152876 Extension toHQ/152877 pothole 1000x500x45mm Square E-3 road. Mapref:page147- Gap. Southboundsideof is onthebendnearMoreton management: Stop&Go.it Marked inred.Traffic Pothole: 600x600x80. due towaterleak Blackice urn219 55586 spillage onthecarriageway 53381 URN1188Largeoil g ewa y fromPostcombe Road Name 31100B401 31100B401 31100B401 2/00175 2/00175 31100B401 2/00175 31100B401 31100B401 31100B401 2/00175 31100B401 2/00175 31100B401 2/00175 2/00175 31100B401 2/00175 31100B401 2/00175 2/00175 2/00175 31100B401 2/00175 2/00175 2/00175 31100B401 2/00175 31100B401 31100B401 Defect SpecInstr NULL B4012 thameparkrd Dormer frmgates approx 100mb4 ph map147E1sb MD TMSG500X500 /147 F5?? signage/600x600x60 fill/green/tm- LM-please 0/147 F5?? signage/1000x400x6 fill/green/tm- LM-please NULL NULL 1000x1000x40 by Phs2 (hq158650) calledin FIND &FIXExtrato NULL tm stopandgo stop andgo NULL 500 x50 PHS2 -extra8000x Find &Fixcalledby 1000 x50 PHS2 POTH1000x Find &Fixcalledby NULL NULL N N N N N N N N N N N N N N N Superseded Flag Easting SUM 470792.37 469918.62 470576.08 470180.62 470574.92 470435.87 470433.90 470442.36 470157.23 470434.88 470891.77 470816.71 470816.38 470895.85 470432.03 Northing SUM 203920.43 201119.36 203085.80 202103.48 203091.09 203320.13 203384.30 203411.11 201476.12 203321.23 204172.91 203978.82 203973.77 204172.44 203369.07 PE 1A HT FAB2 TETSWORTH - W OOH - O/S Long Dew TVP to LSC - URN:257 Tree 31100B401 NULL N CRICKET GRND house B4012 Thame Road down partially blocking the 2/00175

294596 TO S TOLL Tetsworth on the bend carriageway. Attend and

HOUSE clear the carriageway 469903.71 201177.29 15-Jul-2015 15-Jul-2015 15-Jul-2015 COMPLETED

RAN 1B MC CRC TETSWORTH - W B4012 Thame park Road 2 x uneven road boards nr 31100B401 2 x uneven road N 2 CRICKET GRND Dormer Leys 2/00175 boards nr Dormer

302084 TO S TOLL Leys B4012 Thame

HOUSE park Road , ? aware 470154.87 201772.02

04-Nov-2015 04-Nov-2015 04-Nov-2015 RPB.. signs to be COMPLETED maintained and not to be removed untill instructed to do so.

PE 1B GC DAM TETSWORTH - W Tetsworth - B4012 Thame ?- Cat1B - Damaged Gulley 31100B401 NULL N 2 CRICKET GRND Park Rd - ( road B/ween Grating - needs repositioning 2/00175

305223 TO S TOLL Postcombe & Thame) - or permanent make safe -

HOUSE 400m south of Domrmers not Mk in Red - TM Stop & 470168.96 201954.22

14-Dec-2015 14-Dec-2015 15-Dec-2015 Leys Farm - Map P 166 E8 Go COMPLETED

PE 1A MC SPI2 TETSWORTH - W Map 147| F4 Thame, URN 565 06.01.16 Oil all 31100B401 NULL N CRICKET GRND Thame Park Rd, nr Park over the road due to RTC 2/00175

306547 TO S TOLL Grange Farm involving 2 vehicles. - 1 Audi

HOUSE A4 and 1 Isuzu Trooper. 470831.46 204018.99 06-Jan-2016 06-Jan-2016 06-Jan-2016 COMPLETED PE 1A MC FLO2 TETSWORTH - W OOH - B4012 Thame Park 61271 URN1450 - Approx 31100B401 NULL N CRICKET GRND Road Postcombe on left 10m of black ice on the 2/00175

307916 TO S TOLL hand sharp bend just after carriageway which has

HOUSE crossroads map page 166 allegedly caused a motorist 470159.07 201507.19

15-Jan-2016 15-Jan-2016 14-Jan-2016 E7 to E8 to skid off the road nearly COMPLETED hitting a house. No units attending.

INS 3 MC POC TETSWORTH - W NULL Dragon Patcher repairs 31100B401 NULL N 2 CRICKET GRND compleated on site no 9 2/00175 NULL

309398 TO S TOLL covering the area of

HOUSE 148.3m2 470805.02 203926.90 AVAILABLE 27-Jan-2016 12-Dec-2015

D F&F 2 HI BLO2 TETSWORTH - W **B4012 Thame Park **FIND AND FIX** Gully fault 31100B401 no size given - Ref ? N CRICKET GRND Road opp Attington Leys - broken gully and frame to 2/00175

310358 TO S TOLL map 166 E8 be replaced

HOUSE 470158.78 201850.73 COMPLETE 04-Feb-2016 04-Feb-2016 04-Feb-2016 RAN 2 GC DAM TETSWORTH - W B4012 Thame Park Road Damaged gully frame cover 31100B401 md tm sg vm please N 2 CRICKET GRND map 147 E1 2/00175 replace damaged

316228 TO S TOLL 500x500 split lid gully

HOUSE cover map 147 E1 470175.51 202092.90 11-Apr-2016 17-Mar-2016 17-Mar-2016 B4012 Dormer leys COMPLETED frm cone on site

PE 1A MC SPI2 TETSWORTH - W OOH - B4012 from 63666 URN1270 Large 31100B401 NULL N CRICKET GRND Attington Tollhouse diesel spillage runs for about 2/00175

321745 TO S TOLL towards Thame map page a mile and a half on both

HOUSE 147 E1 sides of carriageway. No 470174.45 202090.04

25-Apr-2016 25-Apr-2016 24-Apr-2016 vehicle details COMPLETED PE 1A MC FLO2 TETSWORTH - W Map ref: pg 147 sq F-4. Flooding in this location - 31100B401 NULL N CRICKET GRND Thame, Thame Park impassable for small 2/00175

324564 TO S TOLL Road, near to new housing vehicles. Flood boards

HOUSE development. needed. 470718.27 203737.23 18-May-2016 18-May-2016 18-May-2016 COMPLETED INS 2 MC POT2 TETSWORTH - W B4012 POSTCOMBE TO GULLY EDGE POTHOLE 31100B401 md tm sg approx N CRICKET GRND THAME 2/00175 300m nth of dormer

337914 TO S TOLL leys map 147E1 on

HOUSE bend not marked 470182.50 202228.00 12-Oct-2016 12-Oct-2016 09-Nov-2016 COMPLETED 2.2.3 Supplemental Data - Thames Park Rd Site No. 00000180 Site Ref. B4012 0180 Grid Ref. 470341,202618 B4012 SOUTH OF THAME PARK Vehicle Count Summary From 01/01/2016 To 01/01/2017 Channel: Northbound

DayAv DayAv ‐ ‐ Friday Sunday 7 Monday Tuesday Wednesday Thursday Saturday 5 00:00 87 9 9 11 17 20 9 12 01:00 43 4 4 5 8 12 4 6 02:00 2 3 3 3 4 4 5 3 3 03:00 4 3 4 3 4 3 3 4 3 04:00 5 7 5 6 5 4 4 5 5 05:00 13 14 14 16 14 7 4 14 12 06:00 54 62 56 54 47 15 7 55 42 07:00 149 166 161 160 150 43 15 157 121 08:00 210 235 226 228 204 82 41 221 175 09:00 137 160 142 144 145 113 89 145 133 10:00 121 130 119 124 127 130 103 124 122 11:00 119 131 121 124 127 139 113 124 125 12:00 124 128 123 129 138 147 132 128 132 13:00 128 134 134 131 150 133 119 135 133 14:00 136 148 148 148 163 129 111 148 140 15:00 166 174 175 179 187 125 113 176 160 16:00 215 228 225 233 234 125 115 227 197 17:00 282 309 301 300 267 123 108 292 241 18:00 224 248 247 248 202 108 86 234 195 19:00 115 131 135 139 108 79 70 126 111 20:00 62 66 71 79 66 51 54 69 64 21:00 40 44 50 52 43 38 35 46 43 22:00 24 38 37 39 35 34 25 35 33 23:00 15 20 20 24 29 34 14 22 22

Total 12H(7‐19) 2010 2188 2121 2149 2094 1397 1145 2112 1872 16H(6‐22) 2281 2491 2433 2472 2359 1580 1310 2407 2132 18H(6‐24) 2320 2548 2490 2536 2423 1649 1349 2463 2188 24H(0‐24) 2355 2585 2528 2577 2467 1693 1397 2503 2229

AM Peak 08:00 08:00 08:00 08:00 08:00 11:00 11:00 08:00 08:00 210 235 226 228 204 139 113 221 175

PM Peak 17:00 17:00 17:00 17:00 17:00 12:00 12:00 17:00 17:00 282 309 301 300 267 147 132 292 241

Vehicle Data Analyser Professional R2 23/11/2016

Site No. 00000180 Site Ref. B4012 0180 Grid Ref. 470341,202618 B4012 SOUTH OF THAME PARK Vehicle Count Summary From 01/01/2016 To 01/01/2017 Channel: Southbound

DayAv DayAv ‐ ‐ Friday Sunday 7 Monday Tuesday Wednesday Thursday Saturday 5 00:00 43 4 5 6 11 13 4 7 01:00 2 2 2 3 3 6 7 2 3 02:00 2 2 2 2 3 5 5 2 3 03:00 2 4 3 3 3 4 3 3 3 04:00 1012 10 9 8 6 4 10 9 05:00 46 47 46 46 39 13 8 45 35 06:00 146 164 158 156 128 28 20 150 114 07:00 273 300 302 301 249 57 37 285 217 08:00 251 277 275 271 232 91 58 261 208 09:00 162 173 170 175 159 127 94 168 151 10:00 130 139 136 129 137 157 130 134 137 11:00 130 142 138 135 142 165 150 137 143 12:00 132 140 132 137 154 168 150 139 144 13:00 121 126 121 129 142 147 121 128 129 14:00 123 135 129 137 152 130 104 135 130 15:00 141 161 152 153 164 124 98 154 142 16:00 177 190 183 192 176 121 99 184 163 17:00 227 247 241 246 210 111 78 234 194 18:00 121 138 134 137 129 90 70 132 117 19:00 70 81 79 83 79 65 51 78 72 20:00 43 48 54 52 47 42 35 49 46 21:00 36 36 41 43 35 29 24 38 35 22:00 23 25 27 28 25 25 13 26 24 23:00 911 11 13 18 21 7 1213

Total 12H(7‐19) 1989 2167 2111 2142 2046 1487 1189 2091 1876 16H(6‐22) 2283 2496 2442 2475 2334 1652 1319 2406 2143 18H(6‐24) 2315 2532 2481 2516 2377 1698 1339 2444 2179 24H(0‐24) 2382 2603 2548 2583 2439 1743 1378 2511 2239

AM Peak 07:00 07:00 07:00 07:00 07:00 11:00 11:00 07:00 07:00 273 300 302 301 249 165 150 285 217

PM Peak 17:00 17:00 17:00 17:00 17:00 12:00 12:00 17:00 17:00 227 247 241 246 210 168 150 234 194

Vehicle Data Analyser Professional R2 23/11/2016

Site No. 00000180 Site Ref. B4012 0180 Grid Ref. 470341,202618 B4012 SOUTH OF THAME PARK Vehicle Count Summary From 01/01/2016 To 01/01/2017 Channel: Total Flow PM AM 24H(0 18H(6 16H(6 12H(7 Total

Peak Peak 23:00 22:00 21:00 20:00 19:00 12:00 18:00 11:00 10:00 17:00 09:00 16:00 08:00 07:00 15:00 06:00 05:00 04:00 14:00 03:00 02:00 01:00 13:00 00:00 ‐24) ‐24) ‐22) ‐19) 17:00 08:00 3999 4563 4635 4737 105 184 256 345 249 250 509 298 393 461 422 308 200 259 249 509 461 24 48 75 59 15 12 6 4 6 Monday 17:00 08:00 4355 4987 5080 5188 114 212 267 386 272 269 556 333 418 512 466 335 225 283 260 556 512 30 63 81 61 19 10 7 5 6 Tuesday 17:00 08:00 4232 4875 4971 5076 125 214 254 382 259 255 542 312 408 500 463 327 214 277 254 500 542 31 64 91 60 15 13 7 5 6 Wednesday 17:00 08:00 4290 4947 5051 5160 130 222 265 386 260 545 253 319 425 499 462 332 209 285 260 545 499 37 67 95 62 15 14 6 6 7 Thursday Vehicle 17:00 08:00 4140 4693 4801 4906 113 187 331 269 477 264 304 410 436 399 351 175 315 292 477 292 436 47 60 78 53 13 17 7 7 8 Friday

Data 12:00 11:00 2884 3232 3347 3436 144 198 304 233 287 241 246 174 100 249 259 280 315 315 304 Analyser 55 60 67 93 44 20 10 10 14 28

7 Saturday Professional 12:00 11:00 2333 2629 2688 2775 120 156 263 186 233 183 214 211 214 240 282 282 263 22 37 59 89 98 52 27 12 10 19 33 8 6 Sunday 17:00 08:00 4203 4813 4907 5013

R2 117 204 366 262 526 258 313 411 482 330 442 205 284 263 526 267 482 34 60 84 59 16 13 6 5 7 23/11/2016 5‐DayAv 17:00 08:00 3748 4275 4367 4468 110 183 312 268 435 259 284 359 383 302 338 156 270 262 435 276 383 35 57 78 47 14 18 6 6 9 7‐DayAv 2.3.1 Supplemental Data Summary - Cumor Hill Option 2 Option 3 Sheet pile Soil nailing Strategic Network • "Cumnor hill not such a problem except for the bus services and their stops, the diversion can go via the A420 although I note there are drainage works to happen shortly with lane closures, don’t know if this is an issue brewing for the future" - Bob Eeles' comments. o "bus route for X30 and 4B. Alternative routes available but bus shuttle required for Botley & Cumnor south of A420" - Ruth A's comments. • "The worst impacts would be Monday-Friday: 4 Stagecoach/OBC buses an hour in each direction until early evening, then hourly until 2318. At weekends, a lesser frequency applies: 2-3 buses per hour in each direction but please note that Stagecoach night services operate until approximately 0215 hours. Diverting via the A420 is feasible but there would be much disruption to Cumnor Hill bus users and therefore shuttle bus working may be required" - Chris Spry's comments. • "Cumnor Hill – Jan 14 data. AADT: 6196 Northbound: 2901 Southbound: 3295 " - Richard Bowman's data • Road diversions via the A420 Cumnor Bypass will impact on local journeys.

Strategic Commercial – Impact to •" The Closure at Cumnor Hill would affect school buses coming from the businesses, schools and utilities West of the shut going into Matthew Arnold School. If a closure were to go ahead we would need to plan a timetable change to enable the vehicles to take an alternative route (probably via Farmoor/Botley) " - Anita Syphas' comments • The bus schedule will be affected, possibly need to utilise shuttles to infill the closed section of carriageway. • Urban link into Oxford along Cumnor Hill; schools marginally affected, however if road is fully closed cyclists and pedestrians would create a further problem, as there is no obvious alternative. • Matthew Arnold School in Arnold’s Way would be ‘cut off’ from residences in Cumnor and the west part of Cumnor Hill, however there would be access via the A420 to Botley Road then to Cumnor Hill. • Utilities in the vicinity: o BT duct(s) o Potable water 2 x 100mm mains o Electricity LV o 150mm Low Pressure gas main o Thames Water 175mm foul sewer

Claims – Claims, as a result of; • In the past 3 years, 17 no. complains were recorded. The main issue was damage to property, loss of about pothole, footway defect and blocked gullies. See table 2.3.2 business etc Land access Proposals and preferred option Prefered option Deliverability of the construction preferred option works £794,700 £550,800 Programme 17wks 17wks TM road closure 9wks lane closure, 8wks road closure TM impact Diversion via A420, but big imact to local buses instrumentation installed inclinometers /standpipes and slope access steps have been installed site monitoring TM 1 day Traffic light/Stop&Go per monitoring; 5 times a year Cost of site monitoring TM £3,000.00 Stuff cost (average of year 15-16 & 16-17) £26,072.00 Skanska & Atkins combined staff £18,051.00 cost year 15-16 Skanska & Atkins combined staff £34,093.00 cost year 16-17 2.3.2 SupplementalData-CumnorHill 22-Mar-2016 22-Mar-2016 22-Mar-2016 27-Feb-2015 29-Sep-2014 29-Sep-2014 26-Aug-2014 21-May-2014 22-Jan-2014 22-Jan-2014 Inspected Date

317205 317204 317203 279239 258018 258017 254075 241528 220614 220608 Id 22-Mar-2016 22-Mar-2016 22-Mar-2016 27-Feb-2015 29-Sep-2014 29-Sep-2014 26-Aug-2014 21-May-2014 22-Jan-2014 22-Jan-2014 Created Date COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED Status Code

04-Apr-2016 04-Apr-2016 04-Apr-2016 31-Mar-2015 30-Sep-2014 30-Sep-2014 05-Sep-2014 27-May-2014 20-Feb-2014 20-Feb-2014 Date Completed INS INS INS PE PE PE PE INS PE PE Initiation Type Priority 2 2 2 2 1B 1B 2 2 2 2 Activity HI HI HI HI FC FC MC MC MC MC Code BLO2 BLO2 BLO2 BLO2 POT2 POT2 POC2 POT2 POT2 POC2 Road Description DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, CUMNOR HILL, CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - Location UP HILL) AND 119(GOING BETWEEN 117 CUMNOR HILL UP HILL) AND 119(GOING BETWEEN 117 CUMNORHILL UP HILL) AND 119(GOING BETWEEN 117 CUMNORHILL cumnor Cumnor Hill opposite 119 DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, Hill Cumnor, Cumnor ROAD COTSWOLD JUNCT CUMNOR HILL Cotswold Road Cumnor Hillnrjunc Cumnor Hill Description GULLY BLOCKED GULLY BLOCKED GULLY BLOCKED gully blocked p/hole tm signs mk inred- 1100x300 defect footway TM signs mk inred- - 1400x300 defect footway Way and Arnolds Hurst Lane between defects several POTHOLE m 00mmx40m 1000mmx4 approx size p/hole m 00mmx40m 1500mmx9 approx size cluster Road Name 4/00132 3110C1733 4/00132 3110C1733 4/00132 3110C1733 4/00132 3110C1733 4/00132 3110C1733 4/00132 3110C1733 4/00132 3110C1733 4/00132 3110C1733 4/00132 3110C1733 4/00132 3110C1733 Defect SpecInstr 119 (GOINGUPHILL) BETWEEN 117AND CUMNOR HILL 3 GULLYSBLOCKED. PS. TMSTOP/GO1OF 119 (GOINGUPHILL) BETWEEN 117AND CUMNOR HILL 3 GULLYSBLOCKED. PS. TMSTOP/GO1OF green pipework markedin gully &jetassociated RS tmneededclean traffic due toroadlayoutand need toconsiderstopgo green paintTMCh8may Road roadmarkedwith nr juncwithCotswold road to natureandlocationof to considerstop/godue Down TMCh8mayneed nr juncwithColegrove cluster aroundmanhole A A mk inred-tmsigns footway defect1100x300 - mkinredTMsigns footway defect1400x300 RS -jetpatchasrequired JETPATCH requestby 119 (GOINGUPHILL) BETWEEN 117AND CUMNOR HILL 3 GULLYSBLOCKED. PS. TMSTOP/GO1OF COTSWOLD ROAD HILL JUNCT DEFECT CUMNOR SPH 500X50MM NC pleaserepairp/hole NC pleaserepairp/hole N N N N N N N N N N Superseded Flag

447548.50 447552.11 447554.29 447515.11 447583.23 447588.95 447586.38 447642.69 447637.48 447460.24 Easting SUM Northing 204840.41 204843.98 204850.19 204795.15 204894.59 204899.87 204904.80 204994.70 204984.73 204710.43 SUM 19-Oct-2016 19-Oct-2016 11-Oct-2016 11-Oct-2016 06-Oct-2016 06-Oct-2016 06-Oct-2016

338558 338556 337903 337902 337591 337589 337588 19-Oct-2016 19-Oct-2016 11-Oct-2016 11-Oct-2016 06-Oct-2016 06-Oct-2016 06-Oct-2016

COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED

21-Oct-2016 21-Oct-2016 25-Oct-2016 25-Oct-2016 25-Oct-2016 25-Oct-2016 01-Nov-2016 INS INS INS INS PE PE PE 2 2 2 2 2 2 2 HI HI MC MC MC MC MC BLO2 BLO2 POT2 POL2 POT2 POT2 POT2 CUMNOR HILL, CUMNOR HILL, CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - DOWN COLEGROVE ROAD TO DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, COTSWOLD CHAWLEY - DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, DOWN COLEGROVE ROAD TO COTSWOLD CHAWLEY - CUMNOR HILL, CUMNOR HILL, CUMNOR HILL, COLGRAVE OPPOSITE COLGRAVE OPPOSITE QAE B6 SQUARE PAGE 140 GOING UPHILL) AND HILLSIDE( BETWEEN 119 B6 SQUARE PAGE 140 GOING UPHILL) AND HILLSIDE( BETWEEN 119 140 SQUAREA6 COVER PAGE MANHOLE JUNCTION, NEAR DOWN 140 SQUAREA6 COVER PAGE MANHOLE JUNCTION, NEAR DOWN 115/117 cumnor passed Cumnor hill,twds 115/117 cumnor passed Cumnor hill,twds 115/117 cumnor passed Cumnor hill,twds CUMNOR HILL, CUMNOR HILL, BLOCKED BLOCKED UNEVEN UNEVEN GULLY GULLY 700x300 pothole - 700x300 pothole - 2200x300 pothole - 3110C1733 3110C1733 3110C1733 3110C1733 4/00132 4/00132 4/00132 4/00132 4/00132 3110C1733 4/00132 3110C1733 4/00132 3110C1733 PS.TM STOPGO PS. TMSTOPGO QAE B6 SQUARE UP HILL)PAGE140 B6 SQUARE UP HILL)PAGE140 map p140B6 cumnor passed115/117 Cumnor hill,twds mrkd white-tmS+G map p140B6 cumnor passed115/117 Cumnor hill,twds mrkd white-tmS+G A A HILL, BETWEEN119 JET (2OF2)CUMNOR PLEASE CLEANAND BLOCKED GULLY HILL, BETWEEN119 JET( 1OF2)CUMNOR PLEASE CLEANAND BLOCKED GULLY PAGE 140SQUAREA6 MANHOLE COVER JUNCTION, NEAR COLGRAVE DOWN OPPOSITE CUMNOR HILL, PAGE 140SQUAREA6 MANHOLE COVER JUNCTION, NEAR COLGRAVE DOWN OPPOSITE ROAD, CUMNORHILL, CENTRE OFROAD, 600 X40DEFECTNO2 700X PS.TM STOP/GO NO 1CENTREOF X 100040DEFECT 2000 PS.TM STOP/GO NAD -pothole-700x300 NAD -pothole-700x300 115/117 -mapp140B6 twds cumnorpassed tm S+G-Cumnorhill, 2200x300 -mrkdwhite NAD -pothole- ND HILLSIDE(GOING ND HILLSIDE(GOING - - - - N N N N N N N

447557.20 447548.13 447457.46 447455.55 447553.21 447557.38 447560.68

204853.92 204837.69 204705.62 204703.20 204844.70 204851.30 204857.89 2.4.1 Supplemental Data Summary - A40 Tetsworth

Combined Combined Option 1 Option 1&2 Option 1&3 Combined Option 1&4 Regrade + Regrade Gravity wall Regrade + Pile Regrade + Soil nailing Strategic Network • "A40 Tetsworth, as it forms part of the M40 strategic diversion route, if the M40 were to close in both directions (particularly at peak times) as worst case it would bring both networks to a standstill in the local vicinity as there are no real viable local alternative diversion routes for M40 traffic volumes, as a result of this happening any other alternate diversion would be huge, this would have to be agreed as a contingency plan diversion with other counties and HE, hopefully in advance of any failure of the A40 happening. " - Bob Eeles's comments. "A40 was closed around five times over the past year and four times was long enough to implement the diversion route. It’s Murphy’s Law that as soon as we close Aston Hill there will be an incident on the motorway. " - Ruth Anderson's comments. Email from HE . • "The Red Rose Travel 275 route serves Tetsworth and Postcombe on Mondays- Fridays only. Potential diversionary routes are extremely limited so every effort should be made to minimise the impacts upon local bus users by scheduling the work for nights (from 1830 hours) and at weekends" - Chris Spry's comments. • "M40 Between J6 & J7 – 2015 AADT: 99126 Northbound: 48678 Southbound: 50448 8000 AADT in 2015" - Richard Bowman's data

Strategic Commercial – Impact •" The impact on Tetsworth shut would affect school bus 2706 and would to businesses, schools and probably mean that students from Postcombe would need alternative transport utilities provided for the period of the closure and the 2706 just picks up students from Tetsworth" - Anita Syphas' comments. • Utilities in the vicinity: o BT cables o HV and LV mains overhead cables Claims – Claims, as a result of; • In the past three years, 26 no. complains were recorded and addressed. 23 damage to property, loss of numbers of which are relate to gullies defects. See table 2.4.2. business etc Land access Proposals and preferred option Prefered option Deliverability of estimate of the preferred construction £1,129,300 £1,222,700 £1,527,100 £1,106,800 option Programme 20wks 20wks 17wks 17wks TM road closure road clousure road closure 8wks lane closure + 9 wks road closure TM impact Will need an emergency plan for the situation when M40 is closed instrumentation installed Standpipes (no monitoring requried) site monitoring TM N/A Cost of site monitoring TM £0.00 Stuff cost (average of year 15-16 £17,465.00 Skanska & Atkins combined staff £25,655.00 cost year 15-16 Skanska & Atkins combined staff £9,275.00 cost year 16-17 2.4.2 SupplementalData-A40Tetsworth 15 July 2016 15 July 2016 13 July 2016 13 July 2016 13 July 2016 13 July 2016 13 July 2016 13 July 2016 15 April 2016 01 June 2015 10 September 2014 16 July 2014 17 March 2014 Inspected Date

330118 330117 329930 329929 329928 329927 329926 329925 320445 291840 255540 249066 230235 Id 15 July 2016 15 July 2016 13 July 2016 13 July 2016 13 July 2016 13 July 2016 13 July 2016 13 July 2016 15 April 2016 01 June 2015 10 September 2014 16 July 2014 18 March 2014 Created Date

COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED COMPLETED Status Code

27 July 2016 28 July 2016 27 July 2016 27 July 2016 27 July 2016 27 July 2016 27 July 2016 27 July 2016 10 May 2016 24 June 2015 10 September 2014 06 August 2014 15 July 2014 Date Completed INS INS RAN RAN RAN RAN RAN RAN INS INS PE INS RAN n Type Initiatio 2 2 2 2 2 2 2 2 2 2 1A 2 2 Priority HI MC HI HI HI HI HI HI MC MC HT MC GC Activity BLO2 CKI2 BLO2 BLO2 BLO2 BLO2 BLO2 BLO2 POT2 POT2 OVE2 CKI2 IRL2 Code Road Description TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TETSWORTH - TETSWORTH - TETSWORTH - TETSWORTH - TETSWORTH - TETSWORTH - TETSWORTH - TETSWORTH - TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TETSWORTH - TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TETSWORTH - TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TETSWORTH - TETSWORTH - TETSWORTH - TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE TOLL HOUSE TO ATTINGTON TALAMAGE TURN STOKE Location postcombe towards going east Tetsworth out of A40 1/2mile a40 tetsworth Tetsworth Postcombe to A40 House Attington driveway to just pastthe page 166C7- Tetsworth, A40 at postcombe towards going east Tetsworth out of A40 1/2mile Postcombe Tetsworth to Postcombe Tetsworth to Postcombe Tetsworth to Postcombe Tetsworth to Postcombe Tetsworth to Postcombe Tetsworth to attlington hse tetsworth postcombe to A40 TETSWORTH TO POSTCOMBE A40 Description clearing need blocked 3 gulliesare Stop andGo IMF TM pothole DEFECT EDGE GULLY footpath. over hanging branch unsafe cat 1A orange marked gully around a pothole and go imf tmstop offlets gullies and blocked offlets gullies and blocked offlets gullies and blocked offlets gullies and blocked offlets gullies and blocked offlets gullies and blocked pothole gully edge NULL Road Name 3110000A40/ 00470 3110000A40/ 00470 00470 3110000A40/ 00470 3110000A40/ 3110000A40/ 00470 3110000A40/ 00470 3110000A40/ 00470 3110000A40/ 00470 3110000A40/ 00470 3110000A40/ 00470 3110000A40/ 00470 3110000A40/ 00470 3110000A40/ 00470 Defect SpecInstr NULL marked orange pothole 500x300x40 IMF TMStopandgo Tetsworth goingeast A40 halfmileoutside 200m b4Attingtonhse to tetsworthapprox 166C6 A40Postcombe map tm sg600x400 NULL M40 side Tetsworth toPostcombe (Craig aware)from London Rdpg166C6 blocked gully/offletA40 TAM -unmarked NULL M40 side Tetsworth toPostcombe (Craig aware)from London Rdpg166C6 blocked gully/offletA40 TAM -unmarked M40 side Tetsworth toPostcombe (Craig aware)from London Rdpg166C6 blocked gully/offletA40 TAM -unmarked M40 side Tetsworth toPostcombe (Craig aware)from London Rdpg166C6 blocked gully/offletA40 TAM -unmarked M40 side Tetsworth toPostcombe (Craig aware)from London Rdpg166C6 blocked gully/offletA40 TAM -unmarked M40 side Tetsworth toPostcombe (Craig aware)from London Rdpg166C6 blocked gully/offletA40 TAM -unmarked A40 LONDONROAD OPATTLINGTON HSE GULLY EDGEDEFECT MD TMS/G600X400 PRIORITY BOARDS TETSWORTH TM LONDON ROAD ATTINGTON STUDA40 ACCESS TO GULLY CHAMBEROP REBUILD COARSEOF MD VMPLEASE N N N N N N N N N N N N N Superseded Flag

Easting SUM

469360.82 469345.00 469275.04 469229.86 469287.63 469225.96 469306.60 469252.03 469466.11 469475.17 469280.44 469271.95 469163.59 Northing 201009.14 201026.07 201103.27 201156.98 201098.60 201172.10 201065.58 201141.21 200921.87 200919.47 201105.02 201108.39 201231.68 SUM

Technical Note

Project: Playhatch Road ‐ Phase 2 To: Andrew Goddard

Subject: Optioneering & Option Selection From: Steven Connors

Date: 30 June 2016 cc: David Bullock

Introduction

Atkins have been appointed by Oxfordshire County Council via Skanska to provide technical analysis, assurance and to ultimately compile supporting material for a flood alleviation and highway improvement scheme to Playhatch Road in Oxfordshire. This information will be used to support an application for funding to the Department for Transport (DfT) to evidence that the scheme offers significant value for investment and to facilitate the preliminary design of the final, agreed option. This phase follows an initial Economic Appraisal Study which identified the basis for a Business Case to improve the route to increase its resilience to flooding.

Scheme Context and Existing Problem

Play Hatch is a hamlet in the parish of Eye & Dunsden in South Oxfordshire, approximately 3.2km northeast of Reading, Berkshire. Playhatch Road, which is the subject of the study, is an important link road which connects the A4 in the east, with the A4155 in the west. Playhatch Road’s significance derives from it being the only vehicular crossing of the River Thames north of Reading Town Centre for 8.5km (at Henley‐on‐ Thames). It is estimated that 16,000 vehicles per day (vpd) utilise the route including public transport.

Playhatch Road crosses the flood plain of the River Thames and is subject to high probability of frequent flooding. Severe flood events can lead to significant damage and unacceptable user delays as the road becomes impassable. Such an event in 2014 led to a closure of the highway for 8 months. Any improvement to Playhatch is constrained by the Environment Agency’s requirement that the upstream and downstream flood water levels must not vary significantly from the existing situation.

Purpose of the Technical Note

This interim Technical Note summaries the work undertaken at Phase 2 to‐date, which includes the collaborative Optioneering Workshop with representatives from Oxfordshire County Council and Skanska, longlist option sifting, initial preferred option selection, the re‐running of the baseline flood modelling, sequential highway analysis and the initial concept development of the preferred option.

Optioneering Workshop

An Optioneering Workshop was held 12/06/16. The purpose of this workshop was to collaboratively create a longlist of potential options, agree a sifting criteria/scoring mechanism, refine the longlist to a shortlist and ultimately identify a preferred option.

Attendees of the Optioneering Workshop included:

 David Bullock Oxfordshire County Council  Steven Connors Atkins  Andrew Goddard Skanska  Ian Sivyer Atkins  Peter Metcalf Atkins  Davide Scarcelli Atkins

Contains sensitive information Optioneering & Option Selection 1

Technical Note

Longlist and Option Sifting

It was agreed that the following options would form the definitive longlist:

Table 1 – Longlisted Options

Option Option Description

Option 1 900mm with an upstream chamber

Option 2 Upstream weir and dropped culvert

Option 3 Box culverts at low points

Option 4 Road closure road during flood event

Option 5 Dropped culverts with downstream flow control

Option 6 Temporary diverted road, to be used during flood events

Option 7 Online viaduct for extent

Option 8 Pumped solution

Option 9 Piled Carriageway with earth removal

Option 10 Localised viaducts at low points

Option 11 Culverts/pipes located away from low points

The attendees agreed that the categories to be used for the assessment of each option would be:

 Affordability  Land  Buildability  Impact to Local Environment  Risk & Viability  Maintenance

Affordability, buildability and maintenance were identified as having particular significance, and these were designated as ‘key Categories’ for assessment purposes. Each option was scored at the workshop to refine the longlist to a shortlist and the results of this process can be seen in Appendix A and summarised in the Table‐2 below:

Contains sensitive information Optioneering & Option Selection 2

Technical Note

Table 2 – Sifting Rationale

Option Rationale

Longlist sift

It was considered that merely closing the road with an additional diversion route during the flood event would not be an acceptable Option 4 solution. Furthermore such a proposal may attract public criticism and lead to reputational damage.

Would require significant works to implement, including utilising Option 6 large extents of land outside the highway boundary.

It is likely that this option would be the most expensive of all the options longlisted and not deemed affordable. The road would Option 7 also be closed during construction for a significant duration which compromises the business case.

Initial Shortlist Sift

It was decided that an option which was completely reliant on a Option 5 mechanical method of controlling the water flow would not be acceptable due to the significant required maintenance regime.

As above. However this could be used in combination of other Option 8 options, to improve efficiency.

Secondary Shortlist Sift (based key Categories)

Joint lowest performing option in the Key Categories of residual Option 9 options.

Option 10 As above.

At this stage it was considered that this option was unlikely to Option 11 provide the necessary capacity, which is reflected in the option’s poor Risk & Viability score.

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Option Selection

Following the Optioneering Workshop and associated option sifting process the preferred options which remained for contention were:

 Option 1 ‐ 900m pipes with an upstream chamber  Option 2 ‐ Upstream weir and dropped culvert  Option 3 ‐ Box culverts at low points

The final option selection from the preferred options listed above would be made on the basis of the initial baseline flood modelling.

Outline Conceptual Design

The approach to the outline conceptual design has been developed in four stages:

Figure 1 – Conceptual Development diagram

Determination of target flood level above Ordnance Datum for 1:20 year return period

Calculation of impediment to waterway area if carriageway raised to target level

Calculation of pipe/culvert sizes to replace impeded water way area

Develop preferred option to facilitate hydraulic modelling

Determination of target flood level

Using the Jacobs 2011 ISIS‐TUFLOW model the base‐line was re‐run to establish flood levels for 1:5 and 1:20 year scenarios. The target flood level was based on the 1:20 year return period plus a 25% climate change allowance making the target level 36.22m AOD. This figure has been used to determine the minimum carriageway level for Playhatch road. At its lowest point the carriageway level needs to be raised by some 800mm.

Calculation of impediment to waterway area

Utilising a combination of LiDAR based Digital Terrain Modelling, Client supplied 3D survey information and OS base data, a 3D model has been created of the existing topography of the road and adjacent area. Isopachyte contours have been created to identify the “build up” required to

Contains sensitive information Optioneering & Option Selection 4

Technical Note bring the existing road up to the target flood level. See Appendix B & Drawing S‐5150173‐FEA‐000‐ 001.

The longitudinal profile of the existing road has been compared to the target flood level and a theoretical waterway impediment area has been calculated as approximately 202m² (see Figure 2 below)

Figure 2 – Waterway Impediment Area Diagram

Flood Level

Waterway impediment area Carriageway Level

Calculation of Pipe/Culvert Sizes

As a basis for the more detailed hydraulic modelling, the waterway impediment area has been used to calculate the equivalent number of pipes/culverts which would need to be installed under Playhatch road. This is intended to provide the equivalent waterway area to that lost in the flood plain due to the raising of the carriageway. It quickly became evident that to provide this quantum of flow capacity Option 2 from the shortlisted schemes (upstream weir and dropped culvert) appears to provide the optimum solution.

Development of the Preferred Option as the Basis for Hydraulic Modelling

It is proposed to install box culverts with two different cross sections as follows (see Appendix B & Drawings S‐5150173‐FEA‐000‐003 – 005);

 In the low point from approximately chainage 130 to chainage 270, 14 no box culverts with a clear waterway of 3300mm X 1500mm are proposed.  For the remainder of the affected length 54 box culverts with a clear waterway of 3300mm X 750mm are proposed at a spacing of approximately 6.5m from the outside edge of each culvert.

The depth of the culverts are such that their inverts will be below the level of the existing road surface which could affect the downstream water levels in flood events where the water level would have been contained upstream of the road. To mitigate this effect a series of weirs could be installed to the level of the existing road. The local topography is such that there appears to be natural bunds upstream of the road which are higher the road surface. A system of weirs joining these bunds together would reduce construction costs and local environmental impacts and this configuration has been assumed in the conceptual design. The need for these weirs and/or the presence of the bunds will need to be confirmed at future design stages once detailed topographical surveys are available.

Contains sensitive information Optioneering & Option Selection 5

Technical Note

Other Considerations (see Appendix B & Drawing S‐5150173‐FEA‐000‐006)

In establishing the feasibility of this concept the following has also been considered;

 The road profile would be designed with zero or nominal longitudinal gradient but cambered with transverse crossfalls of 2.5% for drainage purposes. This will reduce construction depths whilst providing adequate drainage to the edge of the carriageway where the hydraulic gradient will be sufficient to ensure adequate surface water run‐off.

 The road construction over the culverts would comprise a geogrid, to reduce reflective cracking from the culvert joints and edges. This would be overlain with 100mm to 250mm of asphaltic layers.

 Consideration should be given to the installation of combined kerb drainage system for the effective removal of surface water run‐off with frequent discharge points into the adjacent ditches for the entire length of the improvement.

 Local re‐profiling of the existing ground immediately adjacent to the downstream end of the culverts may be necessary/desirable where the ground is higher than the culvert invert, to improve hydraulic efficiency and minimise the risk of silting and ongoing maintenance issues.

 Some re‐profiling and improvements to the ditch adjacent to the upstream face of Playhatch road may be necessary. Where upstream weirs cross the ditch it may be necessary to install low capacity orifices in the weir to facilitate normal drainage.

 Further capacity and control over flood levels could be provided by the construction of a pumping station to supplement the upstream weir and dropped culvert configuration. This is not currently allowed for in the concept design and its desirability/necessity will need to be established once the hydraulic modelling update has been completed.

No allowance has been made for enhanced provision for Non‐Motorised Users (NMU) such as footways as these are beyond the current scope. The installation of the culvert system and potential installation of parapets may reduce accessibility, however there is little or no current provision for NMUs.

Construction Issues

Construction would require a road closure for approximately 3 months. It is envisaged that each precast concrete box culvert could be installed and resurfaced in 3 days. It would be possible to install 2 culverts simultaneously by using both ends of Playhatch road for works access.

There is a water main and underground electric cable running parallel to Playhatch Road which may require diversion to implement the works. This would need to be done in advance of the culvert installation.

Contains sensitive information Optioneering & Option Selection 6

Technical Note

Order of Cost

An approximate Order of Cost has been calculated for this installation based on 2016 price base primarily using rates from SPONS. These cost include fees and exclude VAT. These cost can be seen in Table 3 below:

Table 3 – Order of Cost

Item Description Unit Cost £ 1.0 Allowance for preliminaries, site clearance, land and fencing sum £532,758 Drainage, Earthworks, Pavements, Kerbs Footways, Structures, safety 2.0 sum £1,915,652 fences 3.0 Traffic Signs, road markings and signals sum £13,667 4.0 Allowance for not measured items 20% £366,454 5.0 Landscaping 1% £25,285 6.0 Optimism Bias 45% £1,149,217 7.0 Preparation and Supervision Costs 20% £800,607 TOTAL £4,803,639

Contains sensitive information Optioneering & Option Selection 7

Technical Note

Risk

A qualatative risk analysis has been undertaken and the following project risks have been identified with actions/mitigations included. At this stage many of the risks revolve around the iterative process of the option design and the hydraulic modelling and the possibility that additional iterations may be required. The risks have not been monetarised at this stage and therefore an optimisim bias of 45% has been included in the cost assessment.

Table 4 – Risk

Likelihood Ref Phase Description Action Category %age

Water main is more significant Obtain further information 1 Design Med 50% than expected. on water main.

Additional hydraulic Insufficient flooding modelling and reiteration of 2 Design Low 25% remediation design to assess potential residual flooding risks.

Downstream and upstream 3 Design water levels affected by Med 30% Refining hydraulic model. remediation works

Site visits, topographical Flooding protection devices survey, analysis of land 4 Design Med 30% require additional land registry and further design development.

Road increased levels necessitate diversion of 5 Design Low 10% Topographical survey. overhead electrical cables, to provide clearance

Impossible to fully reconnect Analysis of existing utilities to the existing drainage. The 6 Design Low 20% stats and drainage network full drainage network has to design accordingly. be replaced

Works require bridge Structural inspection. Survey 7 Design High 80% structural modifications of existing abutments.

Pumping stations required to Hydraulic modelling and 8 Design Med 30% regulate the flow reiteration of design.

Unforeseen constraints and Produce a detailed work construction issues delays schedule. Assess each 9 Construction Med 50% works beyond the predicted activity and detail the scope construction schedule of works.

Contains sensitive information Optioneering & Option Selection 8

Technical Note Construction issues due to Plant selection, work 10 Construction Med 40% overhead cables coordination.

Construction delays due to Carry out construction in 11 Construction Low 5% severe storm event summer.

Additional measures to seal culvert joints, improved Resurfacing due to differential 12 Maintenance Med 30% foundations, selection of settlements on culverts pavement materials and pavement reinforcement.

Standing water, silt and debris Allowance in maintenance 13 Maintenance High 80% build up programmes

Next Steps

The following activities will now be undertaken to refine the option development and in preparation of the economic case update to support the business case submission to the Department for Transport;

 Flood modelling  Refinement of the design  Refinement of the cost estimate/risk  Buildability Review  Economic case update  Final report

Contains sensitive information Optioneering & Option Selection 9

Technical Note

A. Appendix A

Contains sensitive information Optioneering & Option Selection 10 Playhatch Road ‐ Phase 2

Longlist Scoring

Local Option Option Description Affordability Land Buildability Risk & Viability Maintenance Total Score Environment 900m pipes with an upstream Option1 3 1 1 2 4 3 14 chamber Upstream weir and dropped Option2 4 2 1 2 3 2 14 culvert

Option3 Box culverts at low points 3 1 4 1 3 1 13

Road closure road during flood Option4 1 1 1 1 4 2 10 event Dropped culverts with Option5 3 1 1 1 4 4 14 downstream flow control Temporary diverted road, to be Option6 5 5 2 3 5 1 21 used during flood events

Option7 Online viaduct for extent 5 1 5 3 5 1 20

Option8 Pumped solution 2 2 1 2 1 5 13

Piled Carriageway with Option9 4 1 4 1 3 1 14 earthremoval

Option10 Localised viaduct at low points 4 1 4 1 2 1 13

Culverts/pipes located away Option11 2 3 2 3 4 2 16 from low points

Scores 1 – 5, Positive to negative

Option X Options not to be taken further

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Initial Shortlist Sift

Option3 Box culverts at low points 3 1 4 1 3 1 13

Dropped culverts with Option5 3 1 1 1 4 4 14 downstream flow control

Option8 Pumped solution 2 2 1 2 1 5 13

Piled Carriageway with Option9 4 1 4 1 3 1 14 earthremoval

Option10 Localised viadcut at low points 4 1 4 1 2 1 13

Culverts/pipes located away Option11 2 3 2 3 4 2 16 from low points

Scores 1 – 5, Positive to negative

Option X Dismissed Option

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Secondary Shortlist Sift

Local Key Category Option Option Description Affordability Land Buildability Risk & Viability Maintenance Total Score Combied Score Environment Score 900m pipes with an upstream Option1 3 1 1 2 4 3 14 7 21 chamber Upstream weir and dropped Option2 4 2 1 2 3 2 14 7 21 culvert

Option3 Box culverts at low points 3 1 4 1 3 1 13 8 21

Piled Carriageway with Option9 4 1 4 1 3 1 14 9 23 earthremoval

Option10 Localised viadcut at low points 4 1 4 1 2 1 13 9 22

Culverts/pipes located away Option11 2 3 2 3 4 2 16 6 22 from low points

Scores 1 – 5, Positive to negative

Option sifting

To enable a further refinement of the option, it was agreed at the Optioneering Workshop that the following would form the Key Categories of the assessment: • Affordability • Buildability • Maintenance

Option X Dismissed Option

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Technical Note B. Appendix B

Contains sensitive information Optioneering & Option Selection 11 Drawing No. Revision S-5150173-FEA-000-001 0

VIEWPORT A KEY PLAN

CH 00.000m

CH 200.000m CH 100.000m CH

B478 A4155

KEY

EXISTING OH POLES

FOR CONTINUATION SEE VIEWPORT B B VIEWPORT SEE CONTINUATION FOR EXISTING OVERHEAD CABLE

CONVEYOR BELT

PROPOSED ROAD RASING BANDS

MINIMUM LEVEL MAXIMUM LEVEL NUMBER (m) (m) COLOUR 1 0 0.00

VIEWPORT B 2 0.00 0.20

3 0.20 0.40

4 0.40 0.60

5 0.60 0.80

FOR CONTINUATION SEE VIEWPORT A

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

IN ADDITION TO THE HAZARDS/RISKS NORMALLY ASSOCIATED WITH THE TYPES OF WORK

CH 300.000m 300.000m CH DETAILED ON THIS DRAWING, NOTE THE FOLLOWING SIGNIFICANT RESIDUAL RISKS B478 CONSTRUCTION

CH 200.000m CH WORKS IN CLOSE PROXIMITY OF O/H CABLES & O/H CONVEYOR BELT MAINTENANCE/CLEANING NONE IDENTIFIED AT THIS STAGE PLAY HATCH ROAD USE NONE IDENTIFIED AT THIS STAGE DECOMMISSIONING/DEMOLITION NONE IDENTIFIED AT THIS STAGE

Reproduced from the Ordnance Survey mapping with the permission of the Controller of Her Majesty's Stationery Office © Crown Copyright. Unauthorised reproduction infringes Crown Copyright, and may lead to prosecution or civil proceedings. Oxfordshire County Council Licence No 100023343

FOR CONTINUATION SEE VIEWPORT C Rev. Date Purpose of revision Drawn Checked Approv'd

0 06/07/16 FOR INFORMATION SEE TITLE BLOCK

SPRING LANE VIEWPORT C Mark Kemp Deputy Director - Commercial Environment and Economy Oxfordshire County Council Speedwell House Speedwell Street Oxford OX1 1NE Tel: (01865) 815700 Fax: (01865) 241577 FOR CONTINUATION SEE VIEWPORT B

Project title

PLAYHATCH ROAD PHASE 2 B478

Drawing title

EXISTING AND PROPOSED ISOPACHYTE MAP ROAD LEVELS

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM B478 1:500 Date drawn Date checked Date approved 06/07/16 06/07/16 06/07/16 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\Davide\S-5150173-FEA-000-001.dwg Drawing No. Revision

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U U 0 A D R Drawing No. Revision S-5150173-FEA-000-003 0

INSET A - SCALE 1:250 KEY PLAN

3.3m A4155 3.3m 6.5m 3.3m 6.5m

0.25m 0.25m

TYPICAL PROPOSED ARRANGEMENT OF BOX

CULVERTS FOR EXTENT OF ROAD CH 200.000m 200.000m CH

CH 00.000m SEE INSET A

PLAY HATCH ROAD CH 100.000m 100.000m CH KEY

EXISTING OH POLES

B478 EXISTING OVERHEAD CABLE

CONVEYOR BELT

PROPOSED CULVERT

FOR CONTINUATION SEE SHEET 004 004 SHEET SEE CONTINUATION FOR PROPOSED CULVERT INVERT LEVEL

PROPOSED WIERS

IMPROVED DRAINAGE DITCH

EXISTING ROAD

PROPOSED ROAD/ ESTIMATED MAXIMUM WATER LEVEL FOR 1 TO 20 YEARS RETURN PERIOD

WATER LEVEL INDICATOR

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

IN ADDITION TO THE HAZARDS/RISKS NORMALLY ASSOCIATED WITH THE TYPES OF WORK DETAILED ON THIS DRAWING, NOTE THE FOLLOWING SIGNIFICANT RESIDUAL RISKS Scale 1:500 CONSTRUCTION WORKS IN CLOSE PROXIMITY OF O/H CABLES & O/H 10m 0m 10m 20m 30m CONVEYOR BELT MAINTENANCE/CLEANING NONE IDENTIFIED AT THIS STAGE USE NONE IDENTIFIED AT THIS STAGE DECOMMISSIONING/DEMOLITION NONE IDENTIFIED AT THIS STAGE

Reproduced from the Ordnance Survey mapping with the permission of the Controller of LONG SECTION - CHAINAGE 0-280 Her Majesty's Stationery Office © Crown Copyright. Unauthorised reproduction SCALE - HORIZONTAL 1:500 / VERTICAL 1:50 infringes Crown Copyright, and may lead to prosecution or civil proceedings. Oxfordshire County Council Licence No 100023343

Rev. Date Purpose of revision Drawn Checked Approv'd

0 06/07/16 FOR INFORMATION SEE TITLE BLOCK 38

-0.74% Level 0.02% -0.02%

Mark Kemp Deputy Director - Commercial 35 Environment and Economy Oxfordshire County Council Speedwell House Speedwell Street Oxford 34 OX1 1NE Tel: (01865) 815700 Fax: (01865) 241577 Chainage 40.000 00.000 20.000 30.000 50.000 60.000 80.000 90.000 70.000 10.000 200.000 210.000 220.000 230.000 240.000 250.000 260.000 270.000 280.000 100.000 110.000 120.000 130.000 140.000 150.000 160.000 170.000 180.000 190.000 Project title

PLAYHATCH ROAD PHASE 2 Existing Levels 36.1 36.1 36.1 36.1 36.1 36.4 36.3 36.2 36.2 36.0 36.0 35.9 35.9 35.8 35.8 35.8 35.7 35.7 35.6 35.5 35.6 35.6 35.7 35.7 35.8 35.8 35.8 35.8 35.8

Drawing title

Proposed Levels 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.4 36.3 36.3 36.3 36.3 36.3 LONGITUDINAL SECTIONS SHEET 1 OF 3

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM 1:500 Date drawn Date checked Date approved 06/07/16 06/07/16 06/07/16 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\S-5150173-FEA-000-003.dwg Drawing No. Revision

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KEY PLAN

FOR CONTINUATION SEE SHEET 003

CH 400.000m 400.000m CH CH 300.000m 300.000m CH PLAY HATCH ROAD

DF210 DF210 DF210

KEY

CH 500.000m PROPOSED CULVERT INVERT LEVEL

PROPOSED WIERS

B478 IMPROVED DRAINAGE DITCH

EXISTING ROAD

PROPOSED ROAD/ ESTIMATED MAXIMUM WATER LEVEL FOR 1 TO 20 YEARS RETURN PERIOD

WATER LEVEL INDICATOR

FOR CONTINUATION SEE SHEET 005

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

Reproduced from the Ordnance Survey mapping with the permission of the Controller of LONG SECTION - CHAINAGE 280-530 Her Majesty's Stationery Office © Crown Copyright. Unauthorised reproduction SCALE - HORIZONTAL 1:500 / VERTICAL 1:50 infringes Crown Copyright, and may lead to prosecution or civil proceedings. Oxfordshire County Council Licence No 100023343

Rev. Date Purpose of revision Drawn Checked Approv'd

0 06/07/16 FOR INFORMATION SEE TITLE BLOCK 38

Level -0.01% 0.02% -0.02%

Mark Kemp Deputy Director - Commercial 35 Environment and Economy Oxfordshire County Council Speedwell House Speedwell Street 34 Oxford OX1 1NE Tel: (01865) 815700 Fax: (01865) 241577 Chainage 400.000 410.000 420.000 430.000 440.000 450.000 460.000 470.000 480.000 490.000 280.000 290.000 300.000 310.000 320.000 330.000 340.000 350.000 360.000 370.000 380.000 390.000 500.000 510.000 520.000 530.000 Project title

PLAYHATCH ROAD Existing Levels PHASE 2 35.8 35.9 35.9 35.9 36.0 36.0 36.0 36.0 35.9 35.9 35.9 35.9 35.9 35.9 35.9 35.9 35.9 35.9 35.9 36.0 36.0 36.0 35.9 35.9 35.9 35.9

Drawing title

Proposed Levels 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 LONGITUDINAL SECTIONS SHEET 2 OF 3

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM 1:500 Date drawn Date checked Date approved 06/07/16 06/07/16 06/07/16 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\S-5150173-FEA-000-004.dwg Drawing No. Revision

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KEY PLAN

FOR CONTINUATION SEE SHEET 004 CH 600.000m 600.000m CH

CH 700.000m

PLAY HATCH ROAD B478 KEY

PROPOSED CULVERT INVERT LEVEL

PROPOSED WIERS

IMPROVED DRAINAGE DITCH

EXISTING ROAD

PROPOSED ROAD

ESTIMATED MAXIMUM WATER LEVEL FOR 1 TO 20 YEARS RETURN PERIOD

WATER LEVEL INDICATOR

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

Reproduced from the Ordnance Survey mapping with the permission of the Controller of LONG SECTION - CHAINAGE 530-710 Her Majesty's Stationery Office © Crown Copyright. Unauthorised reproduction SCALE - HORIZONTAL 1:500 / VERTICAL 1:50 infringes Crown Copyright, and may lead to prosecution or civil proceedings. Oxfordshire County Council Licence No 100023343

Rev. Date Purpose of revision Drawn Checked Approv'd

0 06/07/16 FOR INFORMATION SEE TITLE BLOCK

Level 0.45% -0.96% 0.06% -0.79% 36 Mark Kemp Deputy Director - Commercial Environment and Economy Oxfordshire County Council 35 Speedwell House Speedwell Street Oxford OX1 1NE 34 Tel: (01865) 815700 Fax: (01865) 241577

Chainage Project title 530.000 540.000 550.000 560.000 570.000 580.000 590.000 600.000 610.000 620.000 630.000 640.000 650.000 660.000 670.000 680.000 690.000 700.000 710.000 PLAYHATCH ROAD PHASE 2

Existing Levels 36.1 35.9 35.8 35.8 35.9 36.0 36.2 36.2 36.0 35.9 35.8 35.8 35.8 35.8 35.9 35.9 35.9 36.0 36.0 Drawing title

LONGITUDINAL SECTIONS Proposed Levels

36.2 36.2 36.2 36.3 36.3 36.3 36.3 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 36.2 SHEET 3 OF 3

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM 1:500 Date drawn Date checked Date approved 06/07/16 06/07/16 06/07/16 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\S-5150173-FEA-000-005.dwg Drawing No. Revision

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KEY

EXISTING ROAD FROM TOPOGRAPHICAL SURVEY EXISTING GROUND FROM DTM

Scale 1:50

1m 0m 1m 2m 3m

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

IN ADDITION TO THE HAZARDS/RISKS NORMALLY ASSOCIATED WITH THE TYPES OF WORK DETAILED ON THIS DRAWING, NOTE THE FOLLOWING SIGNIFICANT RESIDUAL RISKS

CONSTRUCTION WORKS IN CLOSE PROXIMITY OF O/H CABLES & O/H CONVEYOR BELT MAINTENANCE/CLEANING NONE IDENTIFIED AT THIS STAGE USE NONE IDENTIFIED AT THIS STAGE DECOMMISSIONING/DEMOLITION NONE IDENTIFIED AT THIS STAGE

Rev. Date Purpose of revision Drawn Checked Approv'd

0 06/07/16 FOR INFORMATION SEE TITLE BLOCK

Scale 1:50

1m 0m 1m 2m 3m

Mark Kemp Deputy Director - Commercial Environment and Economy Oxfordshire County Council Speedwell House Speedwell Street Oxford OX1 1NE Tel: (01865) 815700 Fax: (01865) 241577

Project title

PLAYHATCH ROAD PHASE 2

Drawing title

TYPICAL CROSS SECTIONS

Drawing Status FOR INFORMATION Scale 1:50 Scale @ A1 Drawn by Checked by Approved by DS SMC PRM 1m 0m 1m 2m 3m 1:50 Date drawn Date checked Date approved 06/07/16 06/07/16 06/07/16 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\Davide\S-5150173-FEA-000-006 d.dwg Drawing No. Revision

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Playhatch Road Flood Alleviation Economic Appraisal

Oxfordshire County Council

October 2016

Notice

This document and its contents have been prepared and are intended solely for Oxfordshire County Council’s information and use in relation to appraising flood alleviation options for Playhatch Road.

ATKINS Ltd assumes no responsibility to any other party in respect of or arising out of or in connection with this document and/or its contents.

This document has 27 pages including the cover.

Document history

Job number: 5150173 Document ref: 5150173/-DOC-003 Revision Purpose description Originated Checked Reviewed Authorised Date Rev 1.0 Draft for internal comment CJS/TM IS GB Rev 2.0 Draft for client comment CJS/TM IS GB CJS 5/10/16

Atkins Playhatch Road Flood Alleviation Study – Economic Appraisal. Version 2

Table of contents

Chapter Pages Executive summary 4 1. Introduction 5 1.1. Background 5 1.2. Objectives 5 1.3. Approach and Options 5 1.4. Report Layout 6 2. Damage Scenarios and Options 7 2.1. Introduction 7 2.2. Description of Damage Scenarios 7 2.3. Description of Options 8 2.4. Climate Change 9 2.5. Calculation of a Present Value Damages 10 3. Results 11 3.1. Option Benefits 11 3.2. Option Costs 13 3.3. Construction Impacts 13 3.4. Option Benefit Cost Ratio and Viability (DfT Compliant) 14 4. Department for Transport Funding 16 5. Environment Agency Funding 18 5.1. Grant in Aid and Local Levy Funding 18 5.2. Local Economic Benefits 19 6. Summary and Recommendations 21

Appendices 22 Appendix A. Initial Economic Appraisal Report 23 Appendix B. Application of Climate Change Guidance 25 B.1. Annual Average Damages 25 B.2. Calculation of flood damages over appraisal period 26

Tables Table 2-1 Change Factors for Flow in the River Thames 9 Table 3-1 Economic Summary Option Comparison Table, without Climate Change 11 Table 3-2 Economic Summary Option Comparison Table, with Climate Change 13 Table 3-3 Costs of Construction Traffic Disruption 14 Table 3-4 Summary of Costs and Benefits for DfT (PV, £k, 2010 prices and values) 15 Table 4-1 DfT Analysis of Monetised Costs and Benefits (AMCB) summary table without and with Climate Change (PV, £k, 2010 prices & values) 17 Table 5-1 Summary of costs and Benefits for EA (2016 prices) 18 Table 5-2 Partnership Funding Calculator 20

Figures Figure 2-1 Example of Change in River Flow ...... 10

Atkins Playhatch Road Flood Alleviation Study – Economic Appraisal. Version 2

Executive summary

Playhatch Road crosses the River Thames in Oxfordshire near Sonning. During the flooding of 2013-14, it was flooded by the river levels rising and flowing over the road. This resulted in scour of both the road surface and the road embankment. The resulting repairs to the road involved eight months of either full or partial road closure.

The crossing is a key link across the Thames, used by over 16,000 vehicles per day and serving an estimated 215,000 people as well as a wide range of local businesses and organisations. Consequently the repairs caused extensive disruption, requiring traffic to queue at traffic signals or take lengthy diversions onto already congested roads, especially around alternative Thames crossings in Reading and Henley.

Flooding related road closures on Playhatch Road are becoming increasingly frequent with some disruption experienced annually Hydrodynamic modelling of the River Thames in this area1 indicates that approximately 200m of road is at risk of flooding during events with an annual chance less than or equal to 1 in 5 (20%). This modelled length of flooded road increases to approximately 630m in the 1 in 20 annual chance (5%) flood event, equivalent to the 2013-14 flood.

Following the 2013-14 flood, 100m of road embankment required repairs due to scour erosion and 500m of road edge required strengthening. Rarer events can be expected to cause even more damage than that experienced in 2013-14, as longer lengths of the road and embankment would be affected (approximately 1,300m modelled to be affected in the 1 in 100 (1%) event), water levels and velocities (causing scour) would be higher and flooding of the road would occur for longer.

Atkins was commissioned to:  investigate options for improving the flood resilience for Playhatch Road using hydrodynamic modelling to assess potential options and their impacts; and  develop an economic assessment of the identified design, accounting for costs of the scheme and the value of the disruption avoided by reduced flooding.

The design is detailed in the modelling report and consists of raising the embankment and road surface with a series of culverts to allow the river to flow past the road. This report provides a summary of the economic assessment of the design. It follows on from the Initial Economic Appraisal report in March 2016, which is included in Appendix A and includes the detailed methodologies for the valuations of the benefits of reduced flood damage on Playhatch Road. The earlier report concluded that protecting against floods with a 1:20 annual chance (or greater) was most suitable for this road as this captures the majority of the available benefits. The road improvements have now been designed to provide this design standard and therefore avoid the road flooding in the 1:20 annual chance event.

Climate change is predicted to cause an increase in the frequency and severity of flood events, this has been quantified in the UK Climate Projections (Met. Office) and incorporated into Environment Agency guidance. A pro-active approach to climate change has been taken and the road improvements have therefore been designed so that the road would not flood in a 1:20 annual chance event even at the end of the appraisal period i.e. after 60 years of climate change. Hydrodynamic modelling suggests that the proposed improvement to achieve this standard will have a design standard close to the level required to protect against floods with a 1:100 annual chance now, in order to be able to account for the impacts of climate change over the 60 year period.

The appraisal reported in the remainder of this document provides an assessment of the costs and benefits of the road improvement developed to this current 1 in 100 annual chance design standard. It presents the economic appraisal in accordance with both Department for Transport (DfT) standards, excluding climate change, and Environment Agency (EA) standards, including the effects of climate change. This is intended to provide the information required to support the bids for funding potentially to be submitted to each organisation to support delivery of the scheme (the DfT Local Highway Maintenance Challenge Fund Bid and EA Grant in Aid funding).

In summary the assessment indicates that if the road is raised then, over the next 60 years, an estimated £53 million of economic benefits will be gained in the form of avoided losses to the nation due to reduced traffic and

1 “Option Modelling – Preliminary Assessment” Technical Note dated 14/11/2014, addressed to Declan Moss and Kevin Haines.

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commuting disruption, assuming climate change impacts occur in line with Environment Agency forecasts. The scheme therefore delivers strong benefit cost ratios when assessed against both DfT and EA requirements. 1. Introduction

1.1. Background During the flooding of 2013-14, Playhatch Road, a crossing of the River Thames near Sonning, was flooded by the river levels rising and flowing over the road. This resulted in scour of both the road surface and the road embankment. The resulting repairs to the road lasted eight months and the associated full and partial road closures caused extensive disruption to the 16,000 vehicles using the crossing per day and the vehicles on the roads they diverted to.

There is concern about the future flood risk of this road because:

 The current annual flood probability is about 1 in 5 (20%) and this is expected to increase in the future with climate change;  The road is very well used and serves an estimated population of 215,000 as well as a wide range of local businesses and organisations;  As occurred in 2013-14, any road closure (full or one lane) can cause extensive disruption, requiring traffic to wait at traffic signals or take lengthy diversions onto already busy roads, particularly near the alternative Thames crossings in Reading and Henley; and  There is local belief that the vulnerability of this critical link may be limiting the potential for economic growth in the local area.

Road embankment scour protection was installed in 2014 in the form of a geotextile membrane, with a design life of only two years; intended as a temporary measure before a permanent solution was found.

1.2. Objectives The objectives for this study are to provide an economic appraisal of the traffic disruption at Playhatch Road as caused by flooding from the River Thames suitable for application for funding from both the Department of Transport Local Highways Maintenance Challenge fund, the Environment Agency Grant in Aid fund and the Thames Regional Flood and Coastal Committee Local Levy fund.

This appraisal values the net national benefits of preventing flooding damage and disruption in terms of the avoided traffic disruption to business and private road users and the emergency works costs associated with essential repairs after each event.

1.3. Approach and Options To estimate benefits, the economic losses predicted to be incurred due to flooding under two options have been estimated. The benefits of the improvement option are estimated as the reduction in damage and emergency repair costs over the appraisal period relative to the Do Minimum baseline. The options are as follows:

 Do Minimum – continuing the existing situation. Repairs undertaken to prevent scour (2 year design life), while keeping the road at the same height, and therefore no change to the probability of flooding;

 Improve 1 – undertake works to protect the road against a 1 in 20 (5%) annual chance flood event at the end of the design life (60 years), after accounting for the impacts of climate change. Modelling has shown that the standard required to achieve this is very close to the 1:100 standard now. For simplicity, this option will be described as providing a 1:100 standard, though the modelling, design and economic calculations take the actual standard into account. Benefits relative to the Do Minimum would result from the reduction in probability of flooding and associated disruption and emergency repair costs.

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1.4. Report Layout All valuation methodologies are described in Appendix A. The remaining chapters of this report are presented as follows:

 Chapter 2 of this report restates the damage events and scenarios. This is followed by an account of how the event probabilities are assumed to change over the appraisal period. The predicted flooding events across a range of probabilities are used to generate an annual average rate of damage for each epoch.  Chapter 3 provides an overview of the results and discusses sensitivity tests,  Chapters 4 and 5 present the results in the format that would be required for Department for Transport and Environment Agency funding bids respectively.  Chapter 6 then provides a summary and recommendations.

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2. Damage Scenarios and Options

2.1. Introduction Storms and resulting flood events, river and floodplain water levels and associated damages are described in terms of their probability of occurrence. The more severe a rain storm and / or flood event, the less likely it is to occur. This is defined in terms of annual probability. For example, a flood event described as having a 1 in 100 annual chance has an annual probability of 1%. This means that each year, there is a 1% chance that that storm will occur or be exceeded. Even if a 1 in 100 storm occurred the previous year, the probability of a similar storm occurring the next year is the same.

Climate change however is making storms more frequent and more severe with an increase in river flows and resulting flooding.

In order to value the losses incurred as a result of flooding over the appraisal period, in this case 60 years, it is necessary to value the losses likely to be incurred under a range of flood events with differing severities. Recent flood events have suggested that most years, some level of traffic disruption occurs on Playhatch Road because of flooding. Hydrodynamic modelling of the River Thames in this area2 indicates that approximately 200m of road is at risk of overtopping during events with an annual chance of 1 in 5 (20%). This modelled length of flooded road increases to approximately 630m in the 1 in 20 (5%) event. The 2013-14 flood has been assessed as having a 1 in 20 (5%) probability. Following the 2013-14 flood 100m of road embankment required repairs due to scour erosion and 500m of road edge required strengthening. Rarer events can be expected to cause even more damage than that experienced in 2013-14, as longer lengths of the road and embankment would be affected (approximately 1,300m modelled to be affected in the 1 in 100 (1%) event), water levels and velocities (causing scour) would be higher and overtopping would occur for longer.

2.2. Description of Damage Scenarios In order to assess the risk of damage from flooding over the long term, during which time a wide range of storms is likely to occur, this report first describes the consequences of the range of different flood events considered. These have been categorised as:

 Minor damage scenario;  Intermediate damage scenario;  Major damage scenario; and  Extreme damage scenario.

Scour protection measures were constructed after the 2013-14 flood by laying a membrane to protect the embankment. This membrane had a 2 year design life. Consequently, for the purposes of this report, the probability of the scour of the embankment is assumed to be the same now as it was before the 2013-14 flood.

2.2.1. Minor Damage Scenario Under the minor damage flooding scenario, it is assumed that the road only requires minor repairs, which can be carried out under the annual repair budget. This is based on the damages experienced at Playhatch Road which occur almost annually. The minor damage scenario consists of:

 Some water on the road, but road still deemed passable;  Disruption for one day, with a two-way signal control. Traffic disruption relatively minor and not sufficient to prevent commuters getting to their place of work; and  Repair cost of £1,500.

2.2.2. Intermediate Damage Scenario Under the intermediate damage scenario, it is assumed that the road is flooded and the road surface damaged, but the road embankment is not damaged by scour. A full reconstruction of the road surface affected by a storm

2 “Option Modelling – Preliminary Assessment” Technical Note dated 14/11/2014, addressed to Declan Moss and Kevin Haines.

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of this scale (identified to be 50m in length by the hydrodynamic modelling undertaken) is required. This scenario is based on recent recurring damage to Playhatch road, which appears to have approximately a 1 in 5 annual chance of occurring. The intermediate damage scenario consists of:

 Full road closure for three days, based on the assumed flood duration;  Disruption for three weeks (design and mobilisation taking two weeks, repairs taking one week), with a two-way signal control for this time period;  Severe traffic disruption on the first day of flooding, sufficient to prevent commuters from getting to their place of work. On the second and subsequent days it is assumed that commuters plan their journey with an alternative route;  Cost of preliminary design and ground investigation assumed to be £10,000; and  Repair construction costs (including fees and profit) assumed to be £50,000.

2.2.3. Major Damage Scenario This has been based on the damage incurred in January 2014. This included 100m of embankment failure due to prolonged periods of inundation and scour. The major damage scenario consists of:

2.2.4. Extreme Damage Scenario Similar damage to the major scenario is assumed, but with double the length of road affected, as indicated by the hydrodynamic model results for the current 1 in 100 annual chance event. The extreme damage scenario consists of:

 Full road closure for three days, based on the assumed flood duration;  Full road closure for six weeks due to damage to the embankment and road surface;  One lane open with two-way signal controlled traffic for nine and a half months;  Severe traffic disruption on the first day of flooding, sufficient to prevent commuters from getting to their place of work. On the second and subsequent days it is assumed that commuters plan their journey with an alternative route;  Cost of preliminary design and ground investigation assumed to be £90,000 (50% increase in cost compared to the major damage scenario, based on survey and design being similar but over a longer length); and  Repair construction costs (including fees and profit) assumed to be £600,000. Repair is assumed to take 12 weeks (double the cost and double the time due to double the length of road assumed to be affected), hence the two-way signal control duration extended by 6 weeks.

2.3. Description of Options The subsequent chapters in this report value the losses caused by flooding under each damage scenario. However, to value the losses incurred under each option, these damage scenarios need to be assigned a likely probability. This section describes the options in terms of the probability of each damage scenario. This is based on the level of the road surface, the probability of flood events occurring which may cause damage, and the resilience of the road under flood conditions.

2.3.1. Do Minimum This represents the existing situation. Although scour protection was laid during the repairs after the January 2014 flood damage, this only had a design life of 2 years3 and so it has been assumed to be only able to

3 “Summary of Atkins Contribution to Study Jan – Dec 14” Technical Note 5132582/67/DG/005, dated 5/12/14. Addressed to Declan Moss.

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provide limited protection. Under the Do Minimum option (with no assumed climate change), the risk of road flooding continues to be the same as it is now and the probabilities of the four different damage scenarios currently are:

 1 in 1 annual chance event (likely to occur every year) – minor damage scenario, road overtopped, but minimal damage (we understand that the road has some traffic disruption almost every year);  1 in 5 annual chance event (20% probability each year) – intermediate damage scenario, significant road overtopping;  1 in 20 annual chance event (5% probability each year) – major damage scenario, significant road overtopping, the remaining scour protection is ineffectual under these conditions; and  1 in 100 annual chance event (1% probability each year) – extreme damage scenario.

2.3.2. Improve to a 1:100 year Standard of Protection Under this option, the road surface will be above water in approximately a 1 in 100 annual chance event. The design of the embankment will include measures to ensure that the water level both upstream and downstream of Playhatch Road remains the same under each flood event as it would be under the current conditions.

As the road surface is raised, the probability of each damage scenario will be:

 <=1 in 90 annual chance event (1.1% probability each year) – no damage or disruption;  >1 in 100 annual chance event (<5% probability each year) – road potentially just overtopped, minor damage scenario;  1 in 110 annual chance event (0.9% probability each year) – intermediate damage scenario, significant road overtopping;  1 in 120 annual chance event (0.8% probability each year) – major damage scenario; and  1 in 130 annual chance event (0.7% probability each year) – extreme damage scenario.

2.4. Climate Change Climate change is predicted to cause an increase in the severity and frequency of flood events. The guidance issued by the Environment Agency4 presents a series of change in river flow factors for each region and for a range of climate change severities. This appraisal has been based on the central estimate which predicts a 25% increase in river Thames flows by 2070. The change factors are presented in Error! Reference source not found.. Figure 2-1 shows an example of how these increases are applied over three epochs.

Table 2-1 Change Factors for Flow in the River Thames

Epoch Thames Flow Change Factors 2015-2039 2040-2069 2070-2115

Central 10% 15% 25%

4 “Adapting to climate change: Advice for Flood and Coastal Erosion Risk Management Authorities” Environment Agency, 2016.

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Figure 2-1 Example of Change in River Flow

2.5. Calculation of a Present Value Damages Standard economic procedures were followed to generate an annual average cost of damages caused by flooding on the basis of the damages associated with each category of flood events and the probability of each event type occurring in each year.

These damages were then discounted using the Treasury discount rate to produce a Present Value damage. This was completed in accordance with the Treasury Green Book and the Environment Agency FCERM- Appraisal Guidance.

This process is described further in Appendix B.

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3. Results

3.1. Option Benefits

3.1.1. Without Climate Change Table 3-1 below shows the AADs caused by flooding during the appraisal period discounted to a present value, the damages summed, and the benefits for the option compared with the Do Minimum baseline. This excludes consideration of climate change and therefore assumes a constant 1:100 annual chance standard of protection (SoP) is provided by the scheme from the current year and over the 60 year appraisal period (i.e. assuming no future climate change to increase river flows and flood frequency).

The national Do Minimum damages due to flooding are nearly £27 million over 60 years. Under the 1 in 100 Standard of Protection (SoP) option, this reduces to £1.4 million, giving over £25 million of benefits. This is shown in Table 3-1. These are net national benefits and so can be used for applications for national sources of funding, for example, from the DfT.

Table 3-1 Economic Summary Option Comparison Table, without Climate Change

Damages and benefits £k (2016 price date) Improve to 1 in 100 Option name Do Minimum Standard of Protection Annual Probability Standard of Protection 50% 1% NATIONAL VALUES: Design and Repair Costs PVd 2,203 153 Traffic Disruption Full closure PVd 8,715 489 Traffic Disruption 2 way signals PVd 11,747 697 Noise PVd 568 33 Local Air Quality PVd 38 2 Greenhouse Gases PVd 3 0 Accidents PVd 123 7 Infrastructure PVd 24 1 Indirect Tax PVd -441 -25 Local Economy one day loss PVd 3,916 62

Total monetised National PV Damages £k 26,898 1,419 Total monetised National PV Benefits £k 25,478

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Table 3-2 shows the same results but with climate change taken into account. The Do Minimum damages are much higher at over £55 million as the frequency of flooding increases over time. The residual damages are therefore also increased. Consequently, the benefits (reduction in damages) are double the without climate change scenario at nearly £53 million.

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Table 3-2 Economic Summary Option Comparison Table, with Climate Change

Damages and benefits £k (2016 price date) Improve to 1 in 100 Option name Do Minimum reducing to 1:20 standard Annual Probability Standard of Protection 50% 1% to 5% NATIONAL VALUES: Design and Repair Costs PVd 4,275 275 Traffic Disruption Full closure PVd 19,798 1,008 Traffic Disruption 2 way signals PVd 25,797 1,397 Accident PVd 1,294 67 Noise PVd 88 5 Local QA PVd 2 0 Greenhouse Gases PVd 286 15 Infrastructure PVd 51 3 Indirect Tax PVd -939 -49 Local Economy one day loss PVd 4,964 147

Total monetised National PV Damages £k 55,617 2,867 Total monetised National PV Benefits £k 52,750

3.2. Option Costs The proposed option is estimated to cost £7.6 million (including preparation, design, supervision and construction works) in 2016 resource prices. This includes a 5% contingency and 45% uplift to allow for optimism bias in cost estimates.

Ongoing maintenance would be required (excluding any costs of flood repairs), including vegetation clearance, cleaning culverts of silt and debris and sealing up cracks from differential settlement under culverts. An allowance of £10,000 p.a. (2016 prices) has been allowed for these activities.

For the purposes of the cost benefit appraisal the costs were converted to 2010 market prices and discounted to present values with a 2010 base year (using discount rates of 3.5% for 30 years and 3% for subsequent years, in line with DfT’s WebTAG requirements). This generated a Present Value of Costs (PVC) of £6.5 million for implementing and maintaining the option, before allowance for repairing flood damage.

Relative to the Do Minimum, flood damage repair costs are reduced with the option in place (due to the reduction in the number of floods that exceed the standard of protection provided and cause damage). The construction and maintenance costs are therefore offset in the PVC used for the appraisal by these savings, estimated to be £3.3 million PVC (2010 prices and values) with climate change, (or £1.4 million without climate change).

The Environment Agency’s approach to scheme costs is slightly different. A current price date is used and all capital and maintenance costs during the 60 year appraisal period are included. Mitigated repair costs are considered a benefit and so are not included as a negative cost. Under the Environment Agency guidance, the PVC for the proposed option are £7.6 million.

3.3. Construction Impacts The construction of the option will involve disruption to traffic on Playhatch Road over a number of months in the short term. At this stage, it is estimated that the process will involve:

 2 months of single lane closure of Playhatch Road (controlled by signals) to divert utilities and clear vegetation; and  4 months of full closure of the road to install the culverts.

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The traffic disruption costs caused by the road closures have been calculated using the approach adopted to estimate the flooding disruption impacts as described in Appendix A5. The approach uses WebTAG approaches to account for the additional travel costs for those delayed or rerouted as a result of the road/lane closures and the congestion impacts of the additional traffic caused by rerouting.

When converted to 2010 prices and values and discounted to 2010 (in line with WebTAG requirements) the costs of disruption are estimated to be worth £3.7 million, as shown in Error! Reference source not found. below.

Table 3-3 Costs of Construction Traffic Disruption

Construction Impact Construction Delay (£k, discounted 2010 prices, values) 1 Lane Closure (2 months) 351 Full Closure (4 month) 3,304 Total 3,655

3.4. Option Benefit Cost Ratio and Viability (DfT Compliant) Table 3.4 provides a summary of the benefits and costs of the option over the construction period and a 60 year period after opening, appraised in line with DfT guidance and capturing the following impacts:

 Costs of construction and ongoing maintenance;  Savings in flood repair costs;  Traffic delay impacts of construction (including impacts of additional traffic on emissions, noise, accidents, indirect tax and travel time of existing drivers); and  Saving of traffic delay and rerouting impacts caused by flooding (including impacts of additional traffic on emissions, noise, accidents, indirect tax and travel time of existing drivers).

The two columns in the table show estimated impacts without and with assumed climate change. The ‘without climate change’ column shows the forecasts costs and benefits if climate conditions and therefore flooding severity and frequency remain unchanged from current conditions. In these conditions the proposed scheme would provide a 1 in 100 annual chance Standard of Protection (SoP) with significant reduction in traffic disruption and rerouting and flood damage repair costs. Although delays associated with road closures during construction offset nearly 25% of the forecast benefits after opening, the option is forecast to generate a Present Value of Benefit of £12.3 million (in addition to cost savings which reduce the Present Value of Cost), leading to a BCR of 2.5, falling in the DfT’s High Value for Money category.

The second column shows the equivalent forecast impacts if the Environment Agency’s recommended climate change assumptions are applied, increasing the probability of floods at each level of severity through time. The change means that the level of flooding the option provides protection against would have 1 in 20 annual chance by the end of the 60 year appraisal period. The forecast increased frequency of more severe floods (with associated traffic disruption and repair costs) would significantly increase the scale of benefits generated by the scheme, increasing the estimated Present Value of Benefits from £12.3 million to £32.1 million, flood damage repair cost savings from £1.4 million to £3.3 million (all 2010 prices and values) and the BCR from 2.5 to 9.9 accordingly.

The last three lines in the table summarise the impact of including an allowance for avoiding the loss of national productivity experienced as a result of local businesses not being able to function properly on the first day of major flooding. This is considered a net national effect but is outside the scope of standard WebTAG appraisals and is therefore treated as a sensitivity test. The additional benefits increase the NPV of the option by 40% in the scenario excluding climate change impacts and by just under 15% in the scenario including climate change, increasing the estimated BCR to 3.2 and 11.1 for the two scenarios respectively.

5 Note that the approach has been slightly updated for both the impacts of flooding and disruption to take account of the release of WebTAG Databook July 2016 since the work reported in Appendix A was undertaken. The update had a minor impact on values of time and disbenefits associated with increased congestion.

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Table 3-4 Summary of Costs and Benefits for DfT (PV, £k, 2010 prices and values)

Impact Without Climate With Climate Change Change Saving in flooding related traffic disruption 15,924 35,738 Construction related traffic disruption -3,655 -3,655 PVB 12,268 32,083

Cost of construction/maintenance 6,501 6,501 Repair savings -1,668 -3,254 PVC 4,833 3,247

NPV 7,435 28,836 BCR 2.5 9.9

Sensitivity Test Local Productivity Impacts 3,135 3,919 NPV 10,570 32,755 BCR 3.2 11.1

Chapter 4 provides a full Department for Transport Analysis of Monetised Costs and Benefits (AMCB) table.

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4. Department for Transport Funding

The Department for Transport’s Local Highway Maintenance Challenge Fund bid is a potential source of funding for the proposed Playhatch Road scheme. This chapter therefore provides a summary of the economic appraisal presented in the format that would be required for a DfT bid to facilitate this funding bid.

Table 4.1 below provides a summary of the traffic related benefits of implementing the scheme, summarised in line with the Department for Transport’s standard Analysis Monetised Costs and Benefits table.

As outlined above, the assessment has been undertaken in line with guidance and parameters set out in DfT’s WebTAG and accounts for construction and associated costs and delay over the 6 month construction period as well as the probability weighted savings in travel time delay, traffic impacts and repair costs associated with reduced flooding at Playhatch Road.

The information presented is consistent with the information provided in Chapter 3 but provides greater detail on the disaggregation of benefits by source. The breakdown shows that the majority of impacts are associated with changes in travel cost associated with road/lane closure during disruption caused by flooding and construction. These impacts are supplemented by wider externalities caused by the additional traffic rerouting to avoid Playhatch Road during disruption.

As in Chapter 3 the results are presented separately for the without and with climate change scenarios and including a sensitivity test for an allowance for avoiding the loss of national productivity experienced as a result of local businesses not being able to function properly on the first day of major flooding. This is considered a net national effect but is outside the scope of standard WebTAG appraisals.

The table shows the scheme has an estimated BCR of 2.5 (in the DfT’s high value for money category) even in the core without climate change scenario, rising to 3.2 with the sensitivity test. Once climate change impacts are accounted for, the estimated BCR rises considerably to 9.9 and 11.1 (without and with the sensitivity test), falling well within the DfT’s Very High Value for Money category (with a BCR threshold of 4). The results therefore show a strong economic case for the scheme.

When considering the strategic case for the scheme, these net national level economic results should also be set in the context of significant benefits to the local economy. Improved resilience results in a more reliable connectivity across Playhatch Road improving confidence for local development investment (described further in Appendix A).

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Table 4-1 DfT Analysis of Monetised Costs and Benefits (AMCB) summary table without and with Climate Change (PV, £k, 2010 prices & values)

Without Climate With Climate

Change Change Accidents 295 857 Noise 21 60 Local Air Quality 1 0 Greenhouse Gases 61 187 Journey Quality n/a n/a Physical Activity n/a n/a Economic Efficiency: Consumer and Business Users after 15,681 35,135 Construction Economic Efficiency: Consumer and Business Users -3627 -3627 during Construction* Wider Public Finances (Indirect Taxation Revenues) -164 -529 Present Value of Benefits (PVB) 12,268 32,083

Broad Transport Budget 4,833 3,247 Present Value of Costs (PVC) 4,833 3,247

OVERALL IMPACT Net Present Value (NPV) 7,435 28,836

Benefit to Cost Ratio (BCR) 2.5 9.9

Adjusted BCR for Local Productivity

Loss of local productivity (due to flooding) 3,135 3,919

Net Present Value (NPV) 10,570 32,755

Adjusted BCR (not standard WebTAG) 3.2 11.1 * Note that the impacts of construction on environment, accidents and indirect taxation are included in the overall totals for those entries in the table rather than separate entries for construction (so only Economic Efficiency impacts are separated out) to reduce table size

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5. Environment Agency Funding

5.1. Grant in Aid and Local Levy Funding The Environment Agency manages the Flood Defence Grant in Aid fund and this is a potential source of funding for the proposed Playhatch Road scheme. Additional sources of funding include Local Levy which is managed by the Regional Flood and Coast Committee. Both sources of funds require an economic case developed following the principals of the FCERM-AG.

The results of this assessment are shown in Error! Reference source not found.Table 5-1 Summary of costs and Benefits for EA (2016 prices) which presents the same information as Table 4-1 above but following the slightly different appraisal rules required by the Environment Agency, as described in the FCERM-Appraisal Guidance. Costs only include the capital and maintenance costs, over 60 years, and all benefits/disbenefits are included as damages and benefits. All values are presented to 2016 values (except for the traffic disruption losses which are valued in 2018 price date, which is the year in which the losses are expected to be incurred. The PV costs are £7.5 million and the total national economic benefits are nearly £48 million. This results in a net present value of £40 million and a benefit cost ratio of 6.3.

Although the B:C is below the average of 8 currently being achieved by the Grant in Aid fund, the baseline of Do Minimum reduces the benefits compared to a Do Nothing baseline, which would normally be applied for flood defence works. Do Nothing means do nothing to prevent flooding, however Playhatch Road is not primarily a flood defence asset. Under a true Do Nothing, the road would fail, and there would be a significant change in flood risk to Reading and the downstream reaches. This has not been taken into account. The baseline for this appraisal assumes that the road is repaired after each flood event to allow traffic to continue to use the road. Therefore no flood benefits from property have been included, only those relating to the infrastructure of this transportation route.

Table 5-1 Summary of costs and Benefits for EA (2016 prices)

Costs and benefits £k 2016 prices Improve to 1 in 100 reducing to 1 in 20 Option name Do Minimum Standard of Protection AEP or SoP (where relevant) 50% 1% to 5% COSTS: PV capital costs 7,330 PV operation and maintenance costs 243 PV other Optimism bias adjustment - included in above Total PV Costs 7,572 BENEFITS: PV monetised flood damages 55,617 2,867 PV Construction Traffic Disruption 0 4,813 Total monetised PV damages 55,617 7,680 Total monetised PV benefits 47,936

DECISION-MAKING CRITERIA: Net Present Value NPV 40,364 Average benefit/cost ratio BCR 6.3

Two sensitivity test have been completed:

 No climate change occurs  Excluding the one day of business disruption.

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As the design takes a proactive approach to climate change, if no climate change occurs then the as built design standard will remain close to a 1:100 standard of protection. The construction costs will remain constant, and the residual damages drop to £1.4 million. Once traffic disruption during construction is taken into account, then the benefit cost ratio becomes 2.7.

If the losses associated with the one day loss of GVA are omitted (and the effects of climate change included) then the benefit cost ratio drops to 5.7.

The first test proves that if climate change is not as severe as the central estimate, then the benefit cost ratio will be at least 2.7. If climate change is more severe, then the benefit cost ratio will be greater, though to sustain a minimum standard of protection, the road surface may need to be raised further at some point in the future.

The proportion of funding towards any scheme that the Grant in Aid fund may provide is determined through the Partnership Funding Calculator.

The calculator is shown in Table 5-2 and indicates that £2.6 million (35% of capital works) may be accessible from the Grant in Aid fund. This would have to be supported by funds from other sources.

5.2. Local Economic Benefits The assessment presented in this report has excluded the benefits to the local community and the local economy. As these are local benefits they are not valid for inclusion in business cases for national sources of funding.

A full description of the calculation of these benefits is included in Appendix A, and over 60 years these are £595 million. If this is added to the Environment Agency style appraisal then the benefit cost ratio for the option rises to 78.

Atkins Playhatch Road Flood Alleviation Study – Initial Economic Appraisal. Version 1 19

Table 5-2 Partnership Funding Calculator

FCRM Partnership Funding Calculator for Flood and Coastal Erosion Risk Management Grant in Aid (FCRM GiA) Version 8 January 2014

Project Name Playhatch Road Flood Alleviation Scheme Unique Project Number

Key Input cells All figures are in £'s \z\z Calculated cells Figures in Blue to be entered onto Medium Term Plan

SUMMARY: prospect of FCRM GiA funding Scheme Benefit to Cost Ratio: 6.33 to 1 Effective return to taxpayer: 6.33 to 1 Raw Partnership Funding Score 35% (1) Effective return on contributions: n/a to 1

External Contribution or saving required to achieve an Adjusted Score of 100% 4,752,021 (2) Cell (2) shows the minimum amount of contributions and/or reductions in scheme cost that are required to raise the Adjusted PF Score to at least 100%. Further Adjusted Partnership Funding Score (PF) 35% (3) increases on this will improve this scheme's chances of an FCRM GiA allocation in the desired year. Planned savings and contributions should be entered into PV FCERM GiA towards the up-front costs of this scheme (PV Cost for Approval) - (4) cells(9,10,12) and cells(14-17). See NOTE below.

1. Scheme details Risk Management Authority type of asset maintainer LA (5) Yes (6) Is evidence available that a Strategic Approach has been taken, and Duration of Benefits (years) 60 (7) that double counting of benefits has been avoided ?

PV Whole-Life Benefits: 47,936,472 (8) All costs and benefits must be on a Present Value (PV) Whole- PV Costs Life basis over the Duration of Benefits period. Where PV Appraisal Costs (9) Contributions are identified these should also be on a Present PV design & Construction Costs 7,329,831 (10) Value basis. Sub Total - PV Cost for Approval (appraisal,design,construction) 7,329,831 (11)

PV Post-Construction Costs 242,623 (12) PV Whole-Life Costs: 7,572,454 (13) The total value of any necessary contributions will depend on whether maintenance (ongoing costs) is funded through revenue FCRM GiA, or by other PV Contributions secured to date means. PV Local Levy secured to date (14) NOTE: This scheme is to be maintained by an RMA other than the EA (ref cell 5). PV Public Contributions secured to date (15) Capital FCRM GiA will fund the appropriate share of the up-front costs (cell 11) PV Private Contributions secured to date (16) with any shortfall needing to be paid for via contributions identified in cells(14-17). PV Funding form other Environment Agency functions/sources secured to date (17) Future ongoing costs (cell 12) and any contriubutions towards them are a matter for PV Total Contributions secured to date 0 (18) local agreement by the RMA and should NOT be included in cells(14-17). It is WARNING: Contributions less than minimum required in cell (2) recommended that the RMA takes the opportunities created during scheme development to separately secure contributions towards future ongoing costs (cell12).

2. Qualifying benefits under Outcome Measure 2: households better protected against flood risk Number of households in: Before After Change due to scheme 20% most deprived areas 0 0 0 21-40% most deprived areas 0 0 0 60% least deprived areas 0 0 0 At: Moderate Significant Very Moderate Significant Very Moderate Significant Very risk risk significant risk risk significant risk risk significant risk risk risk Annual damages avoided (£), compared with a household at low risk 150 600 1,350

Change in household damages, in: Per year Over lifetime of scheme Qual. benefits (discounted) 20% most deprived areas £ - £ - OM2 (20% ) £ - 21-40% most deprived areas £ - £ - OM2 (21-40%) £ - 60% least deprived areas £ - £ - OM2 (60% ) £ -

3. Qualifying benefits under Outcome Measure 3: households better protected against coastal erosion Number of households in: Before Damages per household avoided: 20% most deprived areas Annual damages avoided £ 6,000 £ 6,000 21-40% most deprived areas Loss expected in 50 20 years 60% least deprived areas Present value of Year 1 loss (i.e. first year damages, £ 1,184 £ 3,015 Long-term loss Medium-term loss discounted based on when loss is expected) Long-term Medium-term loss loss

Change in household damages, in: Year 1 loss avoided: Over lifetime of scheme: Qual. benefits (discounted): 20% most deprived areas £ - £ - OM3 (20% ) £ - 21-40% most deprived areas £ - £ - OM3 (21-40%) £ - 60% least deprived areas £ - £ - OM3 (60% ) £ -

4. Qualifying benefits under Outcome Measure 4: statutory environmental obligations met Payments under: Assumed benefits per unit: Qual. benefits (discounted): OM4a Hectares of net water-dependent habitat created £ 15,000 OM4a £ - OM4b Hectares of net intertidal habitat created £ 50,000 OM4b £ - OM4c Kilometres of protected river improved £ 80,000 OM4c £ - OM4 £ -

5. Qualifying benefits arising from the overall scheme, for entry into the Medium-Term Plan

OM, deprivation: Qual. benefits: Payment rate: FCRM GiA contribution: OM1 £ 47,936,472 5.56 p in the £1 £ 2,663,137 OM2 20% most £ - 45.0 £ - 21-40% £ - 30.0 £ - Least 60% £ - 20.0 £ - OM3 20% most £ - 45.0 £ - 21-40% £ - 30.0 £ - Least 60% £ - 20.0 £ - OM4 £ - 100.0 £ - Total £ 47,936,472 £ 2,663,137 Maximum for Outcomes delivered. The actual value any scheme is elligible for may be less.

Atkins Playhatch Road Flood Alleviation Study – Initial Economic Appraisal. Version 1 20

6. Summary and Recommendations

The following key points can be drawn from the report:

 Playhatch Road, in its current condition, is at risk of some flooding annually, with a 1 in 5 chance each year of the road needing to be closed for repairs. As the road carries 16,000 vehicles per day and serves an estimated population of 215,000 road closures cause considerable disruption, particularly as traffic diverts to already busy roads near alternative Thames crossings in Reading and Henley.  If no account is made for future climate change, forecast flood related damage and closures would cause in the order of £27 million of losses to the nation over the 60 year appraisal period (present value) as a result of the traffic and commuter disruption that occurs during road closure following flood events;  Once climate change is accounted for the losses from damage and disruption caused by flooding would increase to nearly £56 million (present value);  Climate change predictions forecast that the current flood flow with a 1:100 annual chance will in 60 years’ time have an approximate annual chance of 1:20.  The design for Playhatch Road has taken a proactive approach to climate change and will provide an initial protection against approximately a 1:100 annual chance event, reducing over time to a minimum of 1:20 annual chance by the end of the 60 year appraisal period (accounting for climate change).  With climate change taken into account, the PV benefits of the scheme due to avoided damage and disruption are £48 million  Based on Environment Agency valuation approaches, the B:C is 6.3 and the PF calculator raw score is 35%.  Based on Department for Transport economic valuations, this scheme has a High to Very High Value for Money case with a BCR of 2.5 without climate change, rising to 9.9 with climate change.

The analysis has demonstrated that there is a strong economic case for the scheme and it is recommended that:

 Funding is sought from both the Environment Agency and the Department for Transport.

Atkins Playhatch Road Flood Alleviation Study – Initial Economic Appraisal. Version 1 21

Appendices

Atkins Playhatch Road Flood Alleviation Study – Initial Economic Appraisal. Version 1 22

Appendix A. Initial Economic Appraisal Report

Atkins Playhatch Road Flood Alleviation Study – Initial Economic Appraisal. Version 1 23

Atkins Playhatch Road Flood Alleviation Study – Initial Economic Appraisal. Version 1 24

Appendix B. Application of Climate Change Guidance

B.1. Annual Average Damages The probabilities described in Chapter 3 for each flood event scenario were used to produce a curve of damage against annual probability for the range of flood events. The area under the curve is the annual average damage (AAD) caused by flooding. Error! Reference source not found. shows the AAD curves for the Do Nothing and the Improve options as applied at the start of the assessment (before climate change has any effect). The area under the curve for Do Minimum is much larger than for the Improve option, hence the rate of annual damages is much lower with the Improve option.

Figure B-1 Annual Average Damage Curve

5000

4500 Do Minimum 2016

4000 Improve - 1 in 100 Standard 3500

3000

2500

2000

1500 Damages per event £k event per Damages 1000

500

0 0.00 0.20 0.40 0.60 0.80 1.00 Annual Probability

This AAD is a rate of damage per year based on a certain option, climate scenario and a single point in time. A series of AADs were calculated under each option, both with and without climate change. The AADs increase over time without climate change due to increased cost of traffic disruption in future years, reflecting real growth in values of time (in line with DfT’s WebTAG) and growth in traffic levels and associated congestion. With climate change the increase is sharper as the probability of each event becomes more frequent over time.

Error! Reference source not found. Error! Reference source not found.Error! Reference source not found.shows the constant probability of each damage scenario, and the rising AAD.

Atkins Playhatch Road Flood Alleviation Study – Initial Economic Appraisal. Version 1 25

Table B-1 Event Probability and AAD, no climate change

Scenario Flood Event Annual Chance (1 in x) Damages No Damage Minor Intermediate Major Extreme AAD £k Do Minimum 2016 1 1 5 20 100 670 Do Minimum 2030 1 1 5 20 100 872 Do Minimum 2035 1 1 5 20 100 980

Improve 2016 90 100 110 120 130 40 Improve 2030 90 100 110 120 130 51 Improve 2035 90 100 110 120 130 58 Note: excludes Local Employment one day loss

Error! Reference source not found. shows the event scenarios becoming more frequent over time and the AADs increasing by a greater amount than in Error! Reference source not found.. These probabilities were built up from the assumption that there will be minor damage in the 1:100 year event now under the Improve option, and no damages under the 1:20 year event in 60 years’ time. Return period probabilities for the intermediate epochs were interpolated based on the proportion of climate change which is assumed to have occurred by that time.

Table B-2 Event Probability and AAD, with climate change

Scenario Flood Event Annual Chance (1 in x) Damages No Damage Minor Intermediate Major Extreme AAD £k Do Minimum 2016 1 1 5 20 100 820 Do Minimum 2025 1 1 2 10 38 1,780 Do Minimum 2035 1 1 2 10 38 2,192 Do Minimum 2040 to 2069 1 1 1.5 7 29 2,828 Do Minimum 2070 onwards 1 - 1 5 20 4,012

Improve 2016 90 100 110 120 130 42 Improve 2025 39 40 55 67 116 94 Improve 2035 39 40 55 67 116 116 Improve 2040 to 2069 30 31 43 55 110 144 Improve 2070 onwards 20 21 30 40 100 199 Note: includes Local Employment one day loss

B.2. Calculation of flood damages over appraisal period The AAD were applied following the pattern in Figure 2-1 over the 60 year appraisal period and then discounted using the Treasury discount factors to a present value. Discounting is the process of determining the present value of a payment or a stream of payments that is to be received in the future. This is necessary to produce a single value representative of benefit to compare to a single value representative of cost so they can be directly compared. The results are presented in the next chapter.

Atkins Playhatch Road Flood Alleviation Study – Initial Economic Appraisal. Version 1 26

Carolann Simmonds Atkins Ltd Epsom Gateway, 2 Ashley Avenue, Epsom. Surrey KT18 5AL

Email: [email protected] Telephone: 01372 756874

The Atkins logo, ‘Carbon Critical Design’ and the strapline ‘Plan Design Enable’ are trademarks of Atkins Ltd.

Drawing No. Revision S-5150173-FEA-000-003 1

KEY PLAN

2 3 A4155 1 4 5

Co Const & UA Bdy

C Old Channel

250 KEY 00 00 B478

200

150 EXISTING OH POLES

100 EXISTING OVERHEAD CABLE

50 CONVEYOR BELT

PROPOSED BOX CULVERTS

PROPOSED BOX CULVERT INVERT LEVEL

PROPOSED PIPE CULVERT

PROPOSED WIERS

IMPROVED DRAINAGE DITCH

EXISTING ROAD

PROPOSED ROAD/ ESTIMATED MAXIMUM WATER LEVEL FOR 1 TO 20 YEARS RETURN PERIOD

WATER LEVEL INDICATOR GROUND LEVEL ABOVE PROPOSED WEIR LEVELS

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

Rev. Date Purpose of revision Drawn Checked Approv'd 38 0 06/07/16 FOR INFORMATION AE SMC PRM 1 25/08/16 FOR INFORMATION SEE TITLE BLOCK

-0.51% 0.00% -0.00%

36 Level

35 Mark Kemp Deputy Director - Commercial Environment and Economy Oxfordshire County Council Speedwell House 34 Speedwell Street Oxford OX1 1NE Tel: (01865) 815700 33 Fax: (01865) 241577

Project title Chainage 20.000 40.000 00.000 30.000 50.000 60.000 70.000 80.000 90.000 10.000 200.000 210.000 220.000 230.000 240.000 250.000 260.000 270.000 280.000 100.000 110.000 120.000 130.000 140.000 150.000 160.000 170.000 180.000 190.000 PLAYHATCH ROAD PHASE 2

Existing Levels 36.1 36.1 36.1 36.1 36.1 36.2 36.2 36.4 36.3 36.0 36.0 35.9 35.9 35.8 35.8 35.8 35.7 35.7 35.6 35.5 35.6 35.6 35.7 35.7 35.8 35.8 35.8 35.8 35.8 Drawing title BOX CULVERT LAYOUT AND LONGITUDINAL SECTIONS Proposed Levels SHEET 1 OF 5 36.4 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM 1:500 Date drawn Date checked Date approved 25/08/16 25/08/16 25/08/16 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\S-5150173-FEA-000-003.dwg Drawing No. Revision

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U U 1 A R D Drawing No. Revision S-5150173-FEA-000-004 2

KEY PLAN

Drain Path (um)

43.0m

Pool 38.5m Spring Drain

36.3m Drain

BM 36.55m BM 38.54m

Berry Brook

37.1m

Drain Drain

Path (um)

37.2m

Towing Path

River Thames 36.4m

Drain

Track

Drain Drain

36.4m

BM 36.73m 35.9m

35.7m Allotment Gardens Sonning Reach ETL Drain BM 37.16m

35.9m Pond 35.8m

Drain

35.6m WB

Play Hatch 36.3m 2 Drain Pond El Drain Sub Sta 35.8m 3 35.9m

Drain MS

Travelling

Crane

Berry Brook

Water TCB 1 FB 35.7m BM 36.65m

Sonning Eye Drain

Drain 4 Drain A Nursery 35.5m 36.1m

Nursery Track Issues

Drain

35.8m Works

Sonning LB Eye Car Park 35.9m Landing Stage 5 Drain ETL Towing Path Pond

Drain

Pond Sonning Drain Berry Brook Sonning Eye Backwater Sonning Reach Bridges

El Sub Sta 36.1m FB CR Drain Pond Mill

Stream

Landing Stage Track Drain BM 36.73m

Landing Stage PLAY HATCH ROAD Sonning Bridge 35.9m 37.3m

Mill Race

Drain

Path

37.6m Drain LB 43.6m

Swimming Pond Pool

Fn BM Sluice 45.79m Drain Co Const & UA Bdy Pond 45.7m SD

BM 39.66m

Path Sonning

Drain 450

400 Weir River Thames Water C Old Channel Landing Stage

Sluice

Sluice Water Mooring Posts Palace of the Bishops of Salisbury (site of)

Sonning Lock El Sub Sta 350

Slipway

Mooring Posts

Towing Path 50.2m

300

The Dell Sports Ground

Holme Park Tennis Path Court

A Swimming Pool BM 53.66m Drain KEY Pond PROPOSED BOX CULVERTS

PROPOSED BOX CULVERT INVERT LEVEL 500 PROPOSED WIERS

IMPROVED DRAINAGE DITCH

EXISTING ROAD

PROPOSED ROAD/ ESTIMATED MAXIMUM WATER LEVEL FOR 1 TO 20 YEARS WB RETURN PERIOD 35.7m El WATER LEVEL INDICATOR Sub Sta GROUND LEVEL ABOVE PROPOSED WEIR LEVELS

FOR CROSS SECTIONS SEE DRAWING BM 37.16m XX S-5150173-FEA-000-012

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

3838 Rev. Date Purpose of revision Drawn Checked Approv'd

0 06/07/16 FOR INFORMATION AE SMC PRM 1 25/08/16 FOR INFORMATION AE SMC PRM 2 31/10/16 CROSS SECTION ADDED SEE TITLE BLOCK 37

-0.00% -0.00% 0.00%

36 Level

35 Mark Kemp Deputy Director - Commercial Environment and Economy Oxfordshire County Council 34 Speedwell House Speedwell Street Oxford OX1 1NE 33 Tel: (01865) 815700 Fax: (01865) 241577

Chainage Project title 400.000 410.000 420.000 430.000 440.000 450.000 460.000 470.000 480.000 490.000 280.000 290.000 300.000 310.000 320.000 330.000 340.000 350.000 360.000 370.000 380.000 390.000 500.000 510.000 520.000 530.000 PLAYHATCH ROAD PHASE 2

Existing Levels 35.8 35.9 35.9 35.9 36.0 36.0 36.0 36.0 35.9 35.9 35.9 35.9 35.9 35.9 35.9 35.9 35.9 35.9 35.9 36.0 36.0 36.0 35.9 35.9 35.9 35.9 Drawing title BOX CULVERT LAYOUT AND LONGITUDINAL SECTIONS Proposed Levels 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 SHEET 2 OF 5

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM 1:500 Date drawn Date checked Date approved 21/10/16 21/10/16 31/10/16 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\S-5150173-FEA-000-004.dwg Drawing No. Revision

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U 2 A D R Drawing No. Revision S-5150173-FEA-000-005 2 SPRING LANE Allotment KEY PLAN

Drain Path (um)

43.0m

Pool 38.5m Spring Drain

36.3m Drain

Gardens BM 36.55m BM 38.54m

Berry Brook

37.1m

Drain Drain

Path (um)

37.2m

Towing Path

River Thames 36.4m

Drain

Track

Drain Drain

36.4m

BM 36.73m 35.9m

35.7m Allotment Gardens Sonning Reach ETL Drain BM 37.16m

35.9m Pond 35.8m

Drain

35.6m WB

Play Hatch 36.3m 2 Drain Pond El Drain Sub Sta 35.8m 3 35.9m

Drain MS

Travelling

Crane

Berry Brook

Water TCB 1 FB 35.7m BM 36.65m

Sonning Eye Drain

Drain 4 Drain Nursery

35.5m 36.1m

Nursery Track Issues

Drain

35.8m Works

Sonning LB Eye Car Park

Landing Stage 5 Drain ETL Towing Path Pond

Drain

Pond Sonning Drain Berry Brook Sonning Eye Backwater Sonning Reach Bridges

El Sub Sta 36.1m FB CR Drain Pond Mill

Stream

Landing Stage Track Drain BM 36.73m

Landing Stage Sonning Bridge

37.3m

Mill Race

Drain

Path

37.6m Drain LB 43.6m

Swimming Pond Pool

Fn BM Sluice 45.79m Drain Co Const & UA Bdy Pond 45.7m SD

BM 39.66m Path Sonning Drain

Weir River Thames Water C Old Channel Landing Stage

Sluice

Sluice Water Mooring Posts Palace of the Bishops of Salisbury 35.8m B (site of)

Sonning Lock El Sub Sta

Slipway

Mooring Posts

Towing Path 50.2m

35.7m Sports Ground The Dell

Holme Park Tennis B478 Path Court

Swimming Pool BM 53.66m

KEY 650

600 700

550 BM 37.16m PROPOSED BOX CULVERTS

750 PROPOSED BOX CULVERT INVERT LEVEL B PROPOSED WIERS IMPROVED DRAINAGE DITCH

EXISTING ROAD

PROPOSED ROAD

35.9m ESTIMATED MAXIMUM WATER LEVEL FOR 1 TO 20 YEARS RETURN PERIOD

WATER LEVEL INDICATOR

GROUND LEVEL ABOVE PROPOSED WEIR LEVELS

FOR CROSS SECTIONS SEE DRAWING Pond XX S-5150173-FEA-000-012

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

Reproduced from the Ordnance Survey mapping with the permission of the Controller of LONG SECTION - CHAINAGE 530-790 Her Majesty's Stationery Office © Crown Copyright. Unauthorised reproduction SCALE - HORIZONTAL 1:500 / VERTICAL 1:50 infringes Crown Copyright, and may lead to prosecution or civil proceedings. Oxfordshire County Council Licence No 100023343

3838 Rev. Date Purpose of revision Drawn Checked Approv'd

0 06/07/16 FOR INFORMATION AE SMC PRM 1 25/08/16 FOR INFORMATION AE SMC PRM 2 31/10/16 CROSS SECTION ADDED AND SEE TITLE BLOCK 37 CULVERTS MOVED

0.31% -0.48% 0.00%

36 Level

35 Mark Kemp Deputy Director - Commercial Environment and Economy Oxfordshire County Council 34 Speedwell House Speedwell Street Oxford OX1 1NE 33 Tel: (01865) 815700 Fax: (01865) 241577

Chainage Project title 530.000 540.000 550.000 560.000 570.000 580.000 590.000 600.000 610.000 620.000 630.000 640.000 650.000 660.000 670.000 680.000 690.000 700.000 710.000 720.000 730.000 740.000 750.000 760.000 770.000 780.000 790.000 PLAYHATCH ROAD PHASE 2

Existing Levels 36.1 36.1 36.0 36.0 36.2 36.2 36.2 36.2 36.2 36.0 36.2 36.2 36.0 36.0 36.0 35.9 35.8 35.8 35.9 35.9 35.8 35.8 35.8 35.8 35.9 35.9 35.9 Drawing title BOX CULVERT LAYOUT AND LONGITUDINAL SECTIONS Proposed Levels SHEET 3 OF 5 36.3 36.3 36.3 36.3 36.3 36.4 36.4 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM 1:500 Date drawn Date checked Date approved 21/10/16 21/10/16 31/10/16 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\S-5150173-FEA-000-005.dwg Drawing No. Revision

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U 2 A D R Drawing No. Revision S-5150173-FEA-000-010 1

KEY PLAN

Drain

Pool Spring

Drain

The Flowing Spring (PH)

Berry Brook

Botany Bay

Drain Drain

River Thames

Drain

Drain Drain

1 1 2

Homestead Cottage Spring Lane Cottages

Lakeside

Sonning Reach

8 Cottages

1 Drain 4

2 By Ways Pond Willow Cottage Drain 2 The Gallery Drain Pond Drain 3 Works The Centuries Cottage Vine

Cottages

2 Drain 1

Berry Brook

Dunsden Frizers Farm 1 Water Lodge Orchard Lea

Sub Sta Corner Drain Cottage

El Playhatch Hawthorne House Cottage Drain 4 Drain Winona

Hobland

The Eyot 1 House Issues Waterside Cotts Los Altos Frizers Helvij Lydden Farm Orchard Lodge

Drain Forge FrizersHouse Farm Bridge House 5 The Homestead Cott Homestead Oak Barn River House

French Horn Hotel Old Cottage

Long 4 Furleigh The Gardens Barn House 1 Cottages Drain 2 5 Pond Mill Farm House Drain

Pond Drain

Berry Brook Sonning Reach

CR Drain Pond The Mill Mill at Sonning Stream

Millgate Mill Lodge Theatre Drain Sonning Court

Pumping Cedar Cottage Station

Sonning The Flats Great Mill House 3to

Boat House House 3 to 1 1 Frizers Farm Hotel Mill Race

Maddalys The Coach House

Restaurant The Red House Drain Motor Hart House Palace Yacht Yard Club El Sub Sta Jasmine Falcon Cottage Cottage Falcon 2 House Glebe Lodge DeaneryLodge Drain Mulberry Cottage St Andrew's Acre The Boat House Hill 1

Swimming Old Well Court Pond Pool The Little Deanery St Andrew's Church The Deanery Drain Co Const & UA Bdy Pond

The Vicarage

The Gables Yew Tree

1 Cott

Drain The

4 Mews

Bull 6 1 Deanery Inn Cottage Cleaver Cottage The Malt River Thames House C Old Channel The Little Water Cott Brook House Country Cott Holmelea The Rockery Heron's Gate Water The White The Old Exchange Water Ski House The White Club The Old Dorey Chapel 5 Lodge Lych Gate Evencott St Annes Cott

Ivy Cottage Moorland

2 Bow Cott The

Turpins Green 1 House Grove Wistaria Cottage

Ellesmere

Weir Rich's Cott

House Hillside Roxburgh Bishops Close

Cott

Red Nine York Cott Glendale Cottage House Yenton

Sailing Club North Pins Clandon Sarum Cott ia Cottage Lilac

Lodge Groveside The Grove Grove End Laundry Cottage

Old Walls

Shelter

The Gatehouse C Thatched Cottage B478 Swimming Pool KEY B478

800 PROPOSED BOX CULVERTS

850 950

900 PROPOSED BOX CULVERT INVERT LEVEL 1000 PROPOSED WIERS

EXISTING ROAD C Corner PROPOSED ROAD Cottage ESTIMATED MAXIMUM WATER LEVEL FOR 1 TO 20 YEARS RETURN PERIOD

GROUND LEVEL ABOVE PROPOSED WEIR LEVELS Hawthorne FOR CROSS SECTIONS SEE DRAWING Cottage XX S-5150173-FEA-000-012 Hobland

Winona SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

IN ADDITION TO THE HAZARDS/RISKS NORMALLY ASSOCIATED WITH THE TYPES OF WORK DETAILED ON THIS DRAWING, NOTE THE FOLLOWING SIGNIFICANT RESIDUAL RISKS Scale 1:500 House

Frizers Farm CONSTRUCTION WORKS IN CLOSE PROXIMITY OF O/H CABLES & O/H 10m 0m 10m 20m 30m CONVEYOR BELT MAINTENANCE/CLEANING Lydden NONE IDENTIFIED AT THIS STAGE USE NONE IDENTIFIED AT THIS STAGE

Helvij DECOMMISSIONING/DEMOLITION NONE IDENTIFIED AT THIS STAGE

Reproduced from the Ordnance Survey mapping with the permission of the Controller of LONG SECTION - CHAINAGE 790-1040 Her Majesty's Stationery Office © Crown Copyright. Unauthorised reproduction SCALE - HORIZONTAL 1:500 / VERTICAL 1:50 Homestead Cott infringes Crown Copyright, and may lead to prosecution or civil proceedings. Oxfordshire County Council Licence No 100023343

Purpose of revision 3838 Rev. Date Drawn Checked Approv'd 0 25/08/16 FOR INFORMATION AE SMC PRM 1 31/10/16 CROSS SECTION ADDED SEE TITLE BLOCK

ROUNDABOUT -0.00%

36 Level

35 Mark Kemp Deputy Director - Commercial Environment and Economy Oxfordshire County Council 34 Speedwell House Speedwell Street Oxford OX1 1NE Tel: (01865) 815700 33 Fax: (01865) 241577

Chainage Project title 914.271 790.000 800.000 810.000 820.000 830.000 840.000 850.000 860.000 870.000 880.000 890.000 900.000 910.000 930.000 940.000 950.000 960.000 970.000 980.000 990.000 1000.000 1010.000 1020.000 1030.000 1040.000 PLAYHATCH ROAD PHASE 2

Existing Levels 36.1 36.1 36.2 36.2 36.3 36.3 36.3 36.2 36.2 36.2 36.2 36.0 36.0 36.0 35.8 35.9 35.8 35.7 35.6 35.5 35.5 35.5 35.5 35.4 35.4 35.4 Drawing title BOX CULVERT LAYOUT AND LONGITUDINAL SECTIONS Proposed Levels SHEET 4 OF 5 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM 1:500 Date drawn Date checked Date approved 21/10/16 21/10/16 31/10/16 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\S-5150173-FEA-000-010.dwg Drawing No. Revision

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O S-5150173-FEA-000-010 T A

U 1 A D R Drawing No. Revision S-5150173-FEA-000-011 0

KEY PLAN

Drain Path (um)

43.0m

Pool 38.5m Spring Drain

36.3m Drain

BM 36.55m BM 38.54m

Berry Brook

37.1m

Drain Drain

Path (um)

37.2m

Towing Path

River Thames 36.4m

Drain

Track

Drain Drain

36.4m

BM 36.73m 35.9m

35.7m Allotment Gardens Sonning Reach ETL Drain BM 37.16m

35.9m Pond 35.8m

Drain

35.6m WB

Play Hatch 36.3m 2 Drain Pond El Drain Sub Sta 35.8m 3 35.9m

Drain MS

Travelling

Crane

Berry Brook

Water TCB 1 FB 35.7m BM 36.65m

Sonning Eye Drain

Drain 4 Drain Nursery

35.5m 36.1m

Nursery Track Issues

Drain

35.8m Works

Sonning LB Eye Car Park

Landing Stage 5 Drain ETL Towing Path Pond

Drain

Pond Sonning Drain Berry Brook Sonning Eye Backwater Sonning Reach Bridges

El Sub Sta 36.1m FB CR Drain Pond Mill

Stream

Landing Stage Track Drain BM 36.73m

Landing Stage Sonning Bridge

37.3m

Mill Race

Drain

Path

37.6m Drain LB 43.6m

Swimming Pond Pool

Fn BM Sluice 45.79m Drain Co Const & UA Bdy Pond 45.7m SD

BM 39.66m Path Sonning Drain

Weir River Thames Water C Old Channel Landing Stage

Sluice

Sluice Water Mooring Posts Palace of the Bishops of Salisbury B478 (site of)

Sonning Lock El Sub Sta

Slipway

Mooring Posts

Towing Path 50.2m

The Dell Sports Ground

Holme Park Tennis Path Court

Swimming Pool

BM 53.66m 1050 1100 KEY

EXISTING ROAD

PROPOSED ROAD 1150 35.5m ESTIMATED MAXIMUM WATER LEVEL Landing Stage FOR 1 TO 20 YEARS RETURN PERIOD EXISTING BRIDGE ABUTMENT

35.8m Sonning 1200

1220 Backwater B478 Bridges

Car Park

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

IN ADDITION TO THE HAZARDS/RISKS NORMALLY ASSOCIATED WITH THE TYPES OF WORK DETAILED ON THIS DRAWING, NOTE THE FOLLOWING SIGNIFICANT RESIDUAL RISKS Scale 1:500 CONSTRUCTION El Sub Sta WORKS IN CLOSE PROXIMITY OF O/H CABLES & O/H 10m 0m 10m 20m 30m CONVEYOR BELT MAINTENANCE/CLEANING NONE IDENTIFIED AT THIS STAGE USE NONE IDENTIFIED AT THIS STAGE DECOMMISSIONING/DEMOLITION NONE IDENTIFIED AT THIS STAGE

Reproduced from the Ordnance Survey mapping with the permission of the Controller of LONG SECTION - CHAINAGE 1040-1220 Her Majesty's Stationery Office © Crown Copyright. Unauthorised reproduction SCALE - HORIZONTAL 1:500 / VERTICAL 1:50 infringes Crown Copyright, and may lead to prosecution or civil proceedings. Oxfordshire County Council Licence No 100023343

3838 Rev. Date Purpose of revision Drawn Checked Approv'd 0 25/08/16 FOR INFORMATION SEE TITLE BLOCK

0.00%

36 Level

35 Mark Kemp Deputy Director - Commercial Environment and Economy Oxfordshire County Council 34 Speedwell House Speedwell Street Oxford OX1 1NE Tel: (01865) 815700 33 Fax: (01865) 241577

Chainage Project title 1040.000 1050.000 1060.000 1070.000 1080.000 1090.000 1100.000 1110.000 1120.000 1130.000 1140.000 1150.000 1160.000 1170.000 1180.000 1190.000 1200.000 1210.000 1220.378 PLAYHATCH ROAD PHASE 2

Existing Levels 36.1 35.4 35.5 35.5 35.4 35.4 35.3 35.3 35.4 35.4 35.4 35.5 35.6 35.5 35.6 35.7 35.8 35.9 36.2 Drawing title BOX CULVERT LAYOUT AND LONGITUDINAL SECTIONS Proposed Levels SHEET 5 OF 5 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3 36.3

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM 1:500 Date drawn Date checked Date approved 25/08/16 25/08/16 25/08/16 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\S-5150173-FEA-000-011.dwg Drawing No. Revision

G D N A

C I W

O S-5150173-FEA-000-011

T A

U 0 A R D Drawing No. Revision S-5150173-FEA-000-006 2

KEY

EXISTING ROAD FROM TOPOGRAPHICAL SURVEY

EXISTING GROUND FROM DTM

Scale 1:50

1m 0m 1m 2m 3m

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

IN ADDITION TO THE HAZARDS/RISKS NORMALLY ASSOCIATED WITH THE TYPES OF WORK DETAILED ON THIS DRAWING, NOTE THE FOLLOWING SIGNIFICANT RESIDUAL RISKS

Rev. Date Purpose of revision Drawn Checked Approv'd

0 06/07/16 FOR INFORMATION DS SMC PRM 1 25/08/16 FOR INFORMATION AE SMC PRM 2 31/10/16 FOR INFORMATION SEE TITLE BLOCK

Scale 1:50

1m 0m 1m 2m 3m

Mark Kemp Deputy Director - Commercial Environment and Economy Oxfordshire County Council Speedwell House Speedwell Street Oxford OX1 1NE Tel: (01865) 815700 Fax: (01865) 241577

Project title

PLAYHATCH ROAD PHASE 2

Drawing title

TYPICAL CROSS SECTIONS SHEET 1 OF 2

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM AS SHOWN Date drawn Date checked Date approved 21/10/16 21/10/16 31/10/16 Scale 1:100 Scale 1:50 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\S-5150173-FEA-000-006.dwg 4m 3m 2m 1m 0m 2m 4m 1m 0m 1m 2m 3m Drawing No. Revision

G G D N A

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O O S-5150173-FEA-000-006 T A

U U 2 A D R Drawing No. Revision S-5150173-FEA-000-012 0

KEY

EXISTING ROAD FROM TOPOGRAPHICAL SURVEY

EXISTING GROUND FROM DTM

NOTES

· FOR LOCATIONS OF CROSS SECTIONS REFER TO DRAWINGS S-5150173-FEA-000-004, 005 & 010

Scale 1:50

1m 0m 1m 2m 3m

SAFETY, HEALTH AND ENVIRONMENTAL INFORMATION

IN ADDITION TO THE HAZARDS/RISKS NORMALLY ASSOCIATED WITH THE TYPES OF WORK DETAILED ON THIS DRAWING, NOTE THE FOLLOWING SIGNIFICANT RESIDUAL RISKS

Rev. Date Purpose of revision Drawn Checked Approv'd

0 31/10/16 FOR INFORMATION SEE TITLE BLOCK

Scale 1:50

1m 0m 1m 2m 3m

Mark Kemp Deputy Director - Commercial Environment and Economy Oxfordshire County Council Speedwell House Speedwell Street Oxford OX1 1NE Tel: (01865) 815700 Fax: (01865) 241577

Project title

PLAYHATCH ROAD PHASE 2

Drawing title

TYPICAL CROSS SECTIONS SHEET 2 OF 2

Drawing Status FOR INFORMATION

Scale @ A1 Drawn by Checked by Approved by AE SMC PRM AS SHOWN Date drawn Date checked Date approved 21/10/16 21/10/16 31/10/16 Scale 1:50 Oxfordshire Project No & File Ref 5150173

P:\GBCMA\HandT\TSol\AI\Projects\5150173-Playhatch Road-CONN4509\12 CAD_BIM\01 WIP\DR - Drawing Files\S-5150173-FEA-000-012.dwg 1m 0m 1m 2m 3m Drawing No. Revision

G G D N A

C I W

O O S-5150173-FEA-000-012 T A

U U 0 A D R