Geologic Map of Texas Issued for Permitting Purposes 817-563-11« Reference: 1992 Barnes, V.E., 1992, Geologic Map of Texas, Tbpg Firm No

Home , Laredo Formation, Navarro Group

130 ENVIRONMENTAL PARK CALDWELL COUNTY, TEXAS TCEQ PERMIT APPLICATION NO. MSW 2383

TYPE I PERMIT APPLICATION

PART II EXISTING CONDITIONS AND CHARACTER OF THE FACILITY AND SURROUNDING AREA

Prepared for

130 ENVIRONMENTAL PARK, LLC

August 2013 Revised February 2014 Revised June 2014

Revised August 2014

Prepared by

BIGGS & MATHEWS ENVIRONMENTAL 1700 Robert Road, Suite 100 • Mansfield, Texas 76063 • 817-563-1144

TEXAS BOARD OF PROFESSIONAL ENGINEERS TEXAS BOARD OF PROFESSIONAL GEOSCIENTISTS FIRM REGISTRATION NO. F-256 FIRM REGISTRATION No. 50222

And

BIGGS & MATHEWS, INC. 2500 Brook Avenue • Wichita Falls, Texas 76301 • 940-766-0156

TEXAS BOARD OF PROFESSIONAL ENGINEERS FIRM REGISTRATION No. F-834 A::--f:,.~~~""""' OF 7.t- - 'f-"\ • •••• • •• • • ''-+: lc-;,";-··· · ··* · ··· ··.~.p {#.L ...... :~~ . . ~. ....~:~:.~~ ~.~~..... "-o\. 44639 / ~i! 'P_ '• •f'.t- G~ ,·,~ · ~ o~····<:..Gtsi'E.~~····~v;~ ~.rs,(; NAL"'(.~~ Biggs;=. Inc. P/zP, CONTENTS Firm Registration No. F-834

1 EXISTING CONDITIONS SUMMARY ...... 11-1 1.1 Easements and Buffer Zones ...... 11-1 1.2 Site Specific Conditions ...... 11-2

2 WASTE ACCEPTANCE PLAN ...... II-3 2.1 Properties and Characteristics of Waste ...... 11-3 2.2 Volume and Rate of Disposal ...... 11-4

3 GENERAL LOCATION MAPS ...... II-5

4 FACILITY LAYOUT MAPS ...... II-6

5 GENERAL TOPOGRAPHIC MAP ...... 11-7

6 AERIAL PHOTOGRAPH ...... 11-8

7 LAND USE MAP ...... 11-9

8 IMPACT ON SURROUNDING AREA ...... II-10 8.1 Wells Within 500 Feet...... 11-1 0

9 TRANSPORTATION ...... 11-11 9.1 Traffic and Roadways ...... 11-11 9.2 Airport Impact ...... 11-11

10 GENERAL GEOLOGY AND SOILS STATEMENT ...... 11-12 10.1 General Geology ...... 11-12 10.2 Site Stratigraphy ...... 11-14 10.3 General Soils ...... ll-14 1 0.3.1 Stratum I - Soil Profile -Silty Clay with Pebbles and Cobbles ...... ll-14 10.3.2 Stratum II - Weathered Midway- Silty Fat Clay ...... 11-14 10.3.3 Stratum Ill- Unweathered Midway- Silty Dark Gray Clay ...... ll-15 10.4 FaultAreas ...... ll-15 10.5 Seismic Impact Zones ...... 11-17 10.6 Unstable Areas ...... ll-17

Biggs & Mathews Environmental 11-ii 130 Environmental Park - Type I M:\PROJ\129\06\101\P\PART 2.DOCX Rev. 3, 8/21/2014 Part II .,:."ttt.~~ OF t. - "-"'~· · · · · ·· •••• !$''j, ·~ ~ A._ f . •• * .. .,...,~-.. p.r.:~:...... :>~~\ ..9 . . ~:~:.~~44639 ~~~~·!~8···~ ~• ..p ~ /Q;; ~<'>···.~G/ST'f.~~.···~«;..,~ ... .. '";;,/A' ~ ~~~ Biggs & Mathews, Inc. ~ '2.1) . CONTENTS (Continued) Firm Registration No. F-834

11 GROUNDWATER AND SURFACE WATER ...... II-18 11.1 Groundwater ...... 11-18 11.2 Regional Aquifers ...... 11-18 11.2.1 LeonaAquifer ...... ll-18 11 .2.2 Carrizo-Wilcox Aquifer ...... 11-18 11.3 SurfaceWater...... ll-19 11.4 Storm water Permitting ...... 11-20

12 ABANDONED OIL AND WATER WELLS ...... 11-21 12.1 Water Wells ...... 11-21 12.2 Oil and Gas Wells ...... 11-21

13 FLOODPLAINS AND WETLANDS ...... 11-22 13.1 Floodplains ...... 11-22 13.2 Wetlands ...... ll-22

14 ENDANGERED OR THREATENED SPECIES ...... 11-24

15 TEXAS HISTORICAL COMMISSION REVIEW ...... II-25

16 COUNCIL OF GOVERNMENTS AND LOCAL GOVERNMENT REVIEW REQUEST ...... 11-26

l Biggs & Mathews Environmental 11-iii 130 Environmental Park - Type I M:\PROJ\129\06\101\P\PART 2.DOCX Rev. 3, 8/21 /2014 Part II ~~~ J1'. .<.,.J~· · ·· ·· · ..-;o .., •...11.~.:...... · ...... ··.·.··.~"\\:.. ..1. K 0 . ~~~.~~:· .. ~ cG44639tsn.~~,...~~ ">l~:'~iJJi_/~ ~ ~~~~ Biggs & Mathews, Inc. ~~ CONTENTS (Continued) Firm Registration No. F-834

APPENDIX IIA- MAPS AND DRAWINGS

APPENDIX liB- LAND USE ANALYSIS

APPENDIX IIC- TRANSPORTATION STUDY

APPENDIX liD- WETLANDS DOCUMENTATION

APPENDIX liE - ENDANGERED OR THREATENED SPECIES DOCUMENTATION

APPENDIX IIF - CULTURAL RESOURCES SURVEY

APPENDIX IIG - TPDES PERMIT

APPENDIX IIH- FEDERAL AVIATION ADMINISTRATION DOCUMENTATION

APPENDIX Ill- CAPITAL AREA COUNCIL OF GOVERNMENTS DOCUMENTATION

APPENDIX IIJ- FLOODPLAIN DOCUMENTATION

APPENDIX IlK- LOCATION RESTRICTION CERTIFICATIONS

Biggs & Mathews Environmental 11-iv 130 Environmental Park- Type I M:\PROJ\129\06\ 101\P\PART 2.DOCX Rev. 3, 8/21 /201 4 Part II CONTENTS (Continued)

Biggs & Mathews Environmental, Inc. Firm Registration No. 50222 For Sections 8. 1, 10.1, 1 0.2, 10 .3, 1 0.4, 1 0.5, 11.1, 11 .2, 12.1, 12.2.

Biggs & Mathews Inc. Firm Registration No. F-256 For Section 10.6.

Biggs & Mathews Environmental 11-v 130 Environmental Park -Type I M:\PROJ\129\06\101\P\PART 2.DOCX Rev. 3, 8/21/2014 Part II 130 ENVIRONMENTAL PARK

APPENDIX IIA MAPS AND DRAWINGS CONTENTS

IIA.1 Detailed Highway Map IIA.2 General Topographic Map IIA.3 General Locations Map IIA.4 Water Wells Within 500 Feet of Facility Boundary IIA.5 Locations of Oil and Gas Wells IIA.6 FAA Airport Location Map I lA.? Aerial Photograph IIA.8 General Site Plan IIA.9 Geologic Vicinity Map IIA.9A Geologic Vicinity Map Legend IIA.98 Geologic Vicinity Map Legend IIA.9C Generalized Regional Geologic Cross Section IIA.10 Seismic Impact Zone IIA.11 Flood Insurance Rate Map (FIRM) IIA.12 Facility Site Plan IIA.13 Site Layout Plan IIA.14 Groundwater and Landfill Gas Monitoring Plan IIA.15 Cell 1 Development IIA.16 Cell 4 Development IIA.17 Cell 6 Development IIA.18 Cell 8 Development IIA.19 Cell 1 0 Development IIA.20 Cell 13 and 14 Development IIA.21 Landfill Completion Plan IIA.22 Landfill Entrance and Access Road Plan IIA.23 Facility Jurisdictional Wetlands and Appurtenances IIA.24 Facility Screening Plan

Biggs & Mathews Environmental IIA-ii 130 Environmental Park - Type I M:\PROJ\ 129\06\101 \P\PART 2.DOCX Rev. 3, 8/21/2014 Part II, Appendix IIA 0 2 SCALE IN WILES

tmE;

1. FOR GEOLOGIC LEGEND, SEE DRAWING IIA.9A AND IIA.9B. 2. MODIFlEO FROt.l FROM BARNES, 1992 BY ADDING: A. APPROXIAMTE SITE LOCATION. B. PROPOSED LANDFlLL FOOlPRINT. C. MIDWAY/WILCOX CONTACT. D. LABELEb THE PLEISTOCENE LEONA FORMATION. E. LABELED THE PALEOCENE MIDWAY GROUP.

1l:c,. 0> .,~ ::>..

Ol ~ :; 0 >. .3 ,.0> "'0 ·~c ·u > .,0 <.:> I Ol ~ ~

~Q. / "'0 / ~ Q." GEOLOGIC VICINITY MAP 0 ~ CALDv.n.L. COUNTY

0 /"' 130 ENVIRONMENTAL PARK. LLC Ol 130 ENVIRONMENTAL PARK /"' 97'45' .:; TYPE I PERMIT APPUCAliON DATUM IS MEAN SEA LEVEL CONTOUR INTERVAL 200 FEET BIGGS & MATHEWS \ SUPPLEMENTAL 100-FOOT CONTOUR IN COASTAL REGION ENVIRONMENTAL CONSULnNG ENGINEERS

MANSFIELD • WICHITA FALLS GEOLOGIC MAP OF TEXAS ISSUED FOR PERMITTING PURPOSES 817-563-11« REFERENCE: 1992 BARNES, V.E., 1992, GEOLOGIC MAP OF TEXAS, TBPG FIRM NO. ~0222 BUREAU OF ECONOMIC GEOLOG'f, UNIVERSilY OF 2 8/14 1<.0 .0. NO. 2 RESPONSE GlW ESF ESF JNS DSN. FIGURE l£XAS, AUSllN, TEXAS. B/ 14 N.O.D. NO. , RESPONsE GlW ESF JIIS JIIS DWN . GLW lEV OAlE IDOIP110N 0111 BY CD BY Ot< BY - BY CHK. JMS IIA.9 Fill and spotl

[ ~ J ~J Osd Oou [ Os Qds i Old l ~ ~~{~\' ...j Sand sheet, Os : dune sand sheet, Ods: sand dune, Osd : and sand Sand sheet. Os: dune sand sheel. Qds ; sand dune, Osd ; silt sheet, a.,; i deposits. undivided. Osu and clay dune. Ocd G Fleming Formation and Oakville Sandstone. undivided Fleming Formation and Oakville Sandstone. undivided, """fo : Fleming Forma tion, -M-t : and Oakville Sandstone, -M-o I ~al - Alluvium. Oal ; and alkali flat deposits. Oaf Alluvium. Qal , subdiu1ded in R10 Grande delta into areas predominantly clay, Oac . and areas predominantly sand, Oas : and beach-ridge and Catahoula Formation barrier-fla; sand c:eposits, Qbr Catahoula Formation and Frio Clay, undivided, ¢cf . Catahoula Forma ------~~ lion. ~c ; and Frio Clay, ¢1

Terrace deposits. 01 : and DeweyvHie Formation. Qd. with higher level, ~Ew ------~ Qd? Whitsett, ¢Ew • and Nash Creek, ~n . Formations Em 00. . Qbb ~Et - ~TOba I Ejl EWI) Beaumont Formation subdivided into areas predominantly clay, Obc , :--- areas predominantly sand, Obs , in the Rio Grande delta area clay veneer Ea over meanderben sand, Q~ . and barr ier island deposits. Obb Leona Formation, Ole ; Onion Creek Mart, Oo : Seymour, Ose. ' Lingos. Jackson Group. undivided, ¢Ej : Whitsett Formation, ¢Ew : Manning, Manning. Em • Wellborn. Ewb . ahd Yazoo, Eya , Formations Qli . and Gatuna. Og • Formations: Toy Limestone, Ott, Blackwa ter Draw. I n • - -: Wellborn, and Cadell Formations. undivided, E~ ; Manning. Em, Wellborn. Obd , Tahoka, 0ta • Double Lakes. Qdl. and Tule. Otu. Formations: pond. ~ Ewb , and Cadell, Eca . Formations Oun . older alluvial, Oao • and high gravel, Qhg. deposits I' Emo l Lissie Formation t ' Cadell, Eca • and Moodys Branch, Emb • Formations

Qualemary-Tertiary bolson deposits, Qlb: Quaternary· Tertiary deposits, undivided, OT; and Uvalde Gravel. OTu High gravel deposits Yegua Formation Yegua Formation ------r::-r------~ Blanco, Pob , and Rita Blanca. Por , Formations: and unnamed Pliocene Willis Formation Cook Mountain Formation deposits, P.u Laredo Formation. El :Cook Mountain Formation, Ecm ; and Sparta Sand. ------~ Es Sparta Sand Ogallala Formation "c: ~ .~ .c ::!: El Pice Clay, Eep : Weches Formation, Ew ; and Queen C ~ y Sand, Eqc ;o Weches Formation Goliad Formation Goliad Formation .."';,: =>" < Bigford. Eb • and Reklaw, Er. Formations Queen C~ y Sand "'~ :; 0 .s>. ..,"';o c: 5c: e,.. -,I L;j / w ~ 0 :;;. t: 0 Q. GEOLOGIC VICINITY MAP LEGEND 0 "'

MANSFIELD • Vrl CHITA FALLS ISSUm FOR PERMRnNG PURPOSES 8t 7- 563- 11 44 REFERENCE: BARNES, V.E., 1992, GEOLOGIC MAP OF TEXAS, TBPG FIRW NO. S0222 BUREAU OF ECONOM IC GEOLOGY, UNIVERSilY OF e/ 14 N.O.D. NO. 2 RESPOIISE GlW ESF JMS JMS DSN . FIGURE TEXAS, AUSTIN, TEXAS. 6/14 N.O.O. NO. 1 RESI'ONSI: GI.W ESf JIIS JMS OWN. DAlE OCS

Indio Formation, ERin ; and Wtlcox Group, undivided. ERwi lb ea.. Ell.u

lUI ., A.w IIIIi Ilk

Kincaid Formation. Rk ; and Midway Group. undivided. R.mi Reklaw Formation. Er : Carrizo Sand. Ec: Calvert Bluff, EA.c • Simsboro, ll.s . and Hooper. A.h . Formations: Wilcox Group, undivided. ER.wi :Wills (/) Point, A.w • and Kincaid, A.k • Formations: Midway Group. undivided, 6w llmi ; and Reklaw Formation, Carrizo Sand, and Wilcox and Midway Eagle Ford Formation and Buda Limestone, undivided. Keb : Eagle Ford (,) Groups. undivided, EA.u Formation, Kef : Eagle Ford and Woodbine Formations, undivided, Kew ; Boquillas. Kbo • and Eagle Ford. Kef . Formations; Bud a Limestone. Kbu; ~ Woodbine Formation. Kwb : Del Rio Clay and Georgetown Limestone. a: Del Rio Clay. Kdr ; Buda Limestone and Del Rio Clay, undivided, Kbd; (,) undivided. Kdg ; Buda Limestone and Del Rio Clay. undivided. Kbd : Santa Elena Limestone. Kse : Salmon Peak Limestone. Ksa ; Sue Peaks Grayson Marl and Main Street Limestone, undivided. Kgm ; Georgetown Formation. Ksu : McKnight Formation. Kmk : Del Carmen Limestone. Kdm; Limestone. Kgt : Pawpaw Formation and upper limestone unit' of Weno West Nueces Formation. Kwn : Devils River, Kdv . Edwards, Ked . and Limestone, undivided, Kpw • lower part of Washita Group, Kwl ; undivided Comanche Peak. Kcp • Limestones; Hensen Sand, Kh: Glen Rose part ol Washita Group. Kwu : Duck Creek Limestone, Kdc ; Pawpaw Limestone, Kgr : Paluxy Sand and Glen Rose Limestone, undivided. Kpgr; Formation. Weno Limestone. and Denton Clay, undivided, Kpd ; Fort Paluxy Sand, Kpa ; Travis Peak Formation, Ktp ; Twin Mountains Knt Worth Ltmestone and Duck Creek Formation. undivided. KfEscondido Formation, Kes; and Navarro Group and Marlbrook Marl, Fredericksburg Groups. Kw1 : undivided part of Fredericksburg Group, Sand, undivided, Kca undivided, Knb Kfu, Kiamichi Formation, Kki: Goodland Limestone and Walnut Clay, undivided. Kgw ; and Upper Cretaceous rocks, undivided, Ku

Navarro and Taylor Groups, undivided, Knt ; Navarro Group and Marlbrook Marl. undivided, Knb ; Kemp Clay and Corsicana Marl, undivided, Kk c: Kemp Clay, Kke : Nacatoch Sand, Kns : Navarro Group, undivided, Kna : Neylandville and Marlbrook Marls, undivided, Knm; Neylandville Marl, Kne : Marlbrook Mart, Kmb: Pecan Gap Chalk, Kpg : Wolfe City Sand, Kwc ; Ozan Formation. Ko ; Annona Chalk, Kan ; and Upper Cretaceous rocks, undivided. Ku Paluxy Sand, Kpa : Glen Rose Limestone. Kgr : Twin Mountains Olmos, Kol , and San Miguel, Ksm • Formations: Upson Clay, Kuc ; Formation, Ktm ; and Antlers Sand. Ka Anacacho Limestone. Kac; Pecan Gap, Kpg . and Austin, Kau . Chalks; Cow Creek Limestone. Hammell Shale. and Sycamore Sand. undivided and igneous rocks of Austin age, Ki

.,...: ::> m "'~ Fault Austin Chalk, Kau : Gober Chalk and Roxton Limestone, Kgc; Brownstown Marl, Kbr ; Blossom Sand, Kbl ; Bonham Formation, Kbn : Ball shows downthrown side Ector Chalk. Ker : and Upper Cretaceous rocks. undivided. Ku

GEOLOGIC VICINITY MAP LEGEND

130 ENVIRONMENTAL PARK, U.C 130 ENVIRONMENTAL PARK 'NPE I PERMIT APPUCA llON BIGGS & MATHEWS ENVIRONMENTAL CONSULTINC ENGINEERS

MAN SFIELD • WICHITA FALLS ISSUED FOR PERMITT1NG PURPOSES 817-563-1144 GEOLOGIC MAP OF TEXAS TSPG nRN NO. S0222 8/14 N.O.O. NO. 2 RESPONSE GLW ESF JhiS JMS DSN. FIGURt 1992 6/14 N.O.D. NO. 1 RESPONSE GLW ESf JNS JNS OWN . DA'I[ D~ BY tl:S BY Ot< BY 1W BY CHK. JMS IIA.98 A

APPROXIMAT£ SITE ....., ,.., ,. LOCATION ...... , ~.,. ...,...... , ...... ,...... _,...,...... , 4.1 .. ,.., ...... ,...... ,.,. -.-~ .. !:~ =~ -·- ·...... ,..___.• to .....·-· ~ .. -- -· . ... ·-·;.....:: =-=-· - 00

200

800 :!.•

::: '0 c: \ IOOOi ::> 0 ~ "'i.: ::>""'

(.) "'~ .;.; ::> 0 >. I .3

0> 3: APPROXIMATE "0 u SITE LOCATION 1/) "0> 1800 " "'I (.) "'~ 2000 ? li: Cf. / 2200 N 0 / -t: 0 "- 0 A' ~ GENERAUZED REGIONAL GEOLOGIC CROSS SECTION 0 /"' "'N 130 ENVIRONMENTAl PARK. LLC / .;.; 130 ENVIRONMENTAL PARK TYPE I PERMIT APPUCA liON CALWELL COUNlY BlGGS & MATHEWS ~ ENVIRONMENTAL Plate 2 CONSUL liNG ENGINEERS Geologic Section A- A' l.tANSfiELD • \\ICHITA FALLS REFERENCE: ISSUED FOR PERMITllNG PURPOSES ONLY 617-563-1144 C.R. FOLlET, 1975, GROUNO-WAT£R RESOURSES U.S Geok>Oicol Survey in cooperation with the Texas Water Development Boord, TBPG FIRI.t NO. 50222 OF CALDWELL COUNTY, TEXAS, TEXAS WAT£R DSN. OEVELOPt.IENT BOARD REPORT 12 Coldwell County Commissioners' Cour1 and Guodolupe- Blooco River Authority FIGURE 1/14 N.O.O. NO. 1 RESPON$[ GlW Jt.AS Jlr.IS JWS SCALE : GRAPHIC REV OAT! OMf BY DES BY Of1C BY iPf BY CHK . JMS DWG : IIA.9C-RegSec.dwg IIA.9C v 0 I u m e

2 130 ENVIRONMENTAL PARK CALDWELL COUNTY, TEXAS TCEQ PERMIT APPLICATION NO. MSW 2383

TYPE I PERMIT APPLICATION

VOLUME 2 OF 5

Prepared for

130 ENVIRONMENTAL PARK, LLC

August2013 Revised February 2014 Revised June 2014

Revised August 2014

Prepared by

BIGGS & MATHEWS ENVIRONMENTAL 1700 Robert Road, Suite 100 • Mansfield, Texas 76063 • 817-563-1144

TEXAS BOARD OF PROFESSIONAL ENGINEERS T EXAS BOARD OF PROFESSIONAL G EOSCIENTISTS FIRM REGISTRATION NO. F-256 F IRM REGISTRATION N O. 50222

And

BIGGS & MATHEWS, INC. 2500 Brook Avenue • Wichita Falls, Texas 76301 • 940-766-0156

TEXAS B OARD OF PROFESSIONAL ENGINEERS FIRM REGISTRATION No. F-834 130 ENVIRONMENTAL PARK CALDWELL COUNTY, TEXAS TCEQ PERMIT APPLICATION NO. MSW 2383

TYPE I PERMIT APPLICATION

VOLUME 2 OF 5

CONTENTS

PART Ill FACILITY INVESTIGATION AND DESIGN

Attachment A - Site Development Plan

Attachment B- General Facility Design

Attachment C -Facility Surface Water Drainage Report

Attachment C1 - Drainage Analysis and Design

Attachment C2 - Flood Control Analysis

Attachment C3 - Drainage System Plans and Details

~"''"'"'-'-\\ ;-~~. .9.f. . ..~~ - \\'1. , -.J... . ·- ·.. '#. ~Jll#l'~-· '*. .· *' ·.·. ..If} ·~j i!-,.-;.*...: : ...... ·-·~ : .... ~ ~ K.D. MARONEY ~ ~- · ·· :··· .. ···········.. ·· · ··:· ·· ·~ ~ 4 -.. 44639 /~I 1 6 t{b/-~l!C.£NS\~ -c-#~J: '\\~

Biggs & Mathews Environmental 130 Environmental Park- Type I M:\PROJ\129\06\101\P\COVERS INSIDE VOL2.DOCX Rev. 2, 8/21 /2014 130 ENVIRONMENTAL PARK CALDWELL COUNTY, TEXAS TCEQ PERMIT NO. MSW 2383

TYPE I PERMIT APPLICATION

PART Ill- FACILITY INVESTIGATION AND DESIGN

ATTACHMENT C FACILITY SURFACE WATER DRAINAGE REPORT

Prepared for

130 ENVIRONMENTAL PARK, LLC

February 2014 Revised June 2014

Revised August 2014 Prepared by Biggs & Mathews, Inc. Firm Registration No. F-834 BIGGS & MATHEWS ENVIRONMENTAL 1700 Robert Road, Suite 100 • Mansfield, Texas 76063 • 817-563-1144

TEXAS BOARD OF PROFESSIONAL ENGINEERS TEXAS BOARD OF PROFESSIONAL GEOSCIENTISTS FIRM REGISTRATION No. F-256 FIRM REGISTRATION NO. 50222

And

BIGGS & MATHEWS, INC. 2500 Brook Avenue • Wichita Falls, Texas 76301 • 940-766-0156

TEXAS BOARD OF PROFESSIONAL ENGINEERS FIRM REGISTRATION No. F-834 CONTENTS

NARRATIVE ...... C-1

Attachment C1 Drainage Analysis and Design Attachment C2 Flood Control Analysis Attachment C3 Drainage System Plans and Details

Biggs & Mathews Environmental C-ii 130 Environmental Park - Type I M:\PROJ\ 129\06\101\P\PART 3 ATT C.DOCX Rev. 2, 8/21 /2014 Part Ill, Attachment C 130 ENVIRONMENTAL PARK CALDWELL COUNTY, TEXAS TCEQ PERMIT APPLICATION NO. MSW 2383

TYPE I PERMIT APPLICATION

PART Ill- FACILITY INVESTIGATION AND DESIGN

ATTACHMENT C1 DRAINAGE ANALYSIS AND DESIGN

Prepared for

130 ENVIRONMENTAL PARK, LLC

February 2014 Revised June 2014

Revised August 2014

Prepared by

BIGGS & MATHEWS ENVIRONMENTAL 1700 Robert Road, Suite 100 • Mansfield, Texas 76063 • 817-563-1144

TEXAS BOARD OF PROFESSIONAL ENGINEERS TEXAS BOARD OF PROFESSIONAL GEOSCIENTISTS FIRM REGISTRATION NO. F-256 FIRM REGISTRATION No. 50222

And

BIGGS & MATHEWS, INC. l 2500 Brook Avenue • Wichita Falls, Texas 76301 • 940-766-0156 TEXAS BOARD OF PROFESSIONAL ENGINEERS FIRM REGISTRATION NO. F-834 CONTENTS

1 INTRODUCTION ...... C1 -1 1 .1 Purpose ...... C 1-1

2 METHODOLOGY ...... C1-3 2.1 Concepts and Methods ...... C1-3 2.2 Hydrologic and Hydraulic Modeling ...... C1-4 2.2.1 HEC-HMS ...... C1-4 2.3 Hydrologic Elements Naming Convention ...... C1-4

3 EXISTING CONDITIONS ...... C1-5

4 POSTDEVELOPMENT CONDITIONS ...... C1-7

5 PROPOSED DRAINAGE SYSTEM DESIGN ...... C1-9 5.1 Perimeter Drainage System Design ...... C1-9 5.2 Final Cover Drainage Structure Design ...... C1-9

6 EROSION AND SEDIMENTATION CONTROL ...... C1-11 6.1 Final Cover Stormwater System Control Plan ...... C1-11 6.2 Final Cover Stormwater System Maintenance Plan ...... C1-11 6.3 Intermediate Cover Erosion and Sedimentation Control Plan ...... C1-12 6.4 Daily Cover Erosion and Sedimentation Control Plan ...... C1-12

7 EXISTING/POSTDEVELOPMENT COMPARISON ...... C1-14

APPENDIX C1-A Drainage Maps and Existing/Postdevelopment Comparison

APPENDIX C1-B Existing Condition Hydrologic Calculations

APPENDIX C1 -C Postdevelopment Hydrologic Calculations Biggs & Mathews, Inc. Firm Registration No. F-834 APPENDIX C1-D Perimeter Drainage System Design

Biggs & Mathews Environmental C1-ii 130 Environmental Park - Type I M:\PROJ\129\06\101\P\PART 3 ATT C1 .DOCX Rev. 2, 8/21/2014 Part Ill, Attachment C1 CONTENTS (Continued)

APPENDIX C1-E Final Cover Drainage Structure Design

APPENDIX C1-F Intermediate Cover Erosion and Sedimentation Control Plan

APPENDIX C1-G Intermediate Cover Erosion Control Structure Design

Biggs & Mathews, Inc. Firm Registration No. F-834

Biggs & Mathews Environmental C1-iii 130 Environmental Park- Type I M:\PROJ\129\06\101 \P\PART 3 ATT C1.DOCX Rev. 2, 8/21 /2014 Part Ill, Attachment C1 At CPS the peak discharge will increase from 2SS.S cfs to 2S7.S cfs, a change of less than 0.8%, and at CP6 the peak discharge will decrease from 2121 .3 cfs to 2033.6 cfs, a change of approximately 4%. At CPS, the runoff volume will increase from S8.S acre-feet to S9.4 acre-feet, a change of only 1.S%, and at CP6, the runoff volume will increase from 6S9.3 acre-feet to 676.0 acre-feet, a change of less than 2.S%. CPS and CP6 are located in channels of unnamed tributaries on the west side of the 130 Environmental Park site. These tributaries merge approximately 3SO feet south of the permit boundary and flow into SCS Reservoir Site 21. CPS and CP6 are both located within the 100-year floodplain, as are the tributaries that flow from them in to the SCS reservoir site. The slight decreases in peak flow rates and CPS and CP6, and in the stream channels between them and the reservoir site will not result in an adverse alteration of existing drainage patterns. The slight increases in runoff volumes at and below CPS and CP6 will occur in stream channels and within the reservoir site, all of which are located within the 100-year floodplain, will not reduce total streamflows or increase the 1oo..:year flood water surface elevation. The changes at CPS and CP6 will not result in adverse alterations of existing drainage patterns.

At CP7 the 2S-year storm peak discharge will decrease from 243.4 cfs to 141 .8 cfs, a reduction of approximately 42%, and at CP8 the peak discharge will decrease from 372.4 cfs to 327.2 cfs, a reduction of approximately 12.1%. At CP7, the 2S-year storm runoff volume will increase from 38.S acre-feet to 61 .8 acre-feet, an increase of approximately 60.S%, and at CP8 the runoff volume will decrease from 63.8 acre-feet to S3.3 acre-feet, a decrease of approximately 16.S% . CP7 and CP8 are both located within the same water body, 100 year floodplain of SCS Reservoir Site 21 , in the eastern portion ef the siteduring the 2S-year storm event. The reductions in peak flow rates at CP7 and CP8 will not result in adverse alterations of existing drainage patterns. The 2S year storm runoff volume will increase at CP7; however, because the peak discharge rate will be reduced and the runoff volume will be distributed over a longer time period, that increase will not result in an adverse alteration of existing drainage patterns. And , while the 2S-year storm runoff volume will increase at CP7 and decrease at CP8 (a net increase of 12.8 acre feet, approximately 12.S% ), these changes will not reduce total streamflows or increase the 100 year flood water surface elevation be insignificant compared to the receiving body, SCS Reservoir Site 21 . For example. the peak storage volume of the SCS Reservoir Site 21 and peak inflow to the reservoir from Dry Creek exceed 2,300 ac-ft and 3,800 cfs. respectively, during the 2S-year storm event. Considering the proposed net changes within the water body of less than 4% decrease in peak discharge rate and less than 1% increase in volume,.,. +!he changes at CP7 and CP8 will not result in adverse alterations of existing drainage patterns. Drawing C1-A-2 - Existing Condition Runoff Summary: This drawing depicts the existing locations (comparison points) where surface water enters or exits the facility and property boundaries. Each comparison point is shown on the drawing and the peak flow rate and runoff volume is provided in the summary table for each comparison point. Drawing C1-A-4- Postdeveloped Runoff Summary: This drawing depicts the locations (comparison points) where surface water enters or exits the facility and property boundaries. Each comparison is shown on the drawing and the peak flow rate and runoff volume is provided in the summary table for each comparison point.

Biggs & Mathews Environmental C1-14a 130 Environmental Park- Type I M:\PROJ\129\06\101 \P\PART 3 ATT C1 .DOCX Rev. 2, 8/21/2014 Part Ill, Attachment C1 A table comparing the existing condition runoff summary and the postdeveloped runoff summary is provided on page C1-A-5. The existing condition and postdeveloped peak flow rate, runoff volume, and velocity at each comparison point for both the 25- and 1 00-year, 24-hour rainfall event is provided. The difference, if any, between the existing and postdeveloped runoff results is also provided in the table.

Conclusion

Because: (1) the postdevelopment stormwater discharge points are consistent with the existing site configuration, and (2) development of the 130 Environmental Park Landfill will not adversely alter peak flow rates, velocities, or runoff volumes, the proposed landfill development will not adversely alter existing drainage patterns consistent with §330.305(a).

Biggs & Mathews Environmental C1-14b 130 Environmental Park- Type I M:\PROJ\129\06\101\P\PART 3 ATT C1 .DOCX Rev. 2, 8/21 /2014 Part Ill, Attachment C1