Road Building Material Needs
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STATE GRAVEL SUPPLY STRATEGY ROAD BUILDING MATERIAL NEEDS PAVEMENT MATERIAL REQUIREMENTS FOR THE ROADS 2025 REGIONAL ROADS DEVELOPMENT STRATEGY W. Chilcott B. Saligari Senior Technical Officer – Materials Senior Project Manager – Gravel Strategy MAIN ROADS Western Australia May 2008 Page 1 of 9 ROAD BUILDING MATERIAL NEEDS.doc 1. BACKGROUND In 1998 the State Gravel Supply Strategy was issued by the Government of Western Australia to ensure the availability of high quality readily available and reasonably priced road building materials for the future. One of the recommended actions was to compile and maintain a database of regional and local needs for Road Building Material (RBM) and to identify the resources to meet these needs. In 2008 the Roads 2025 Regional Road Development Strategy was produced as a revision of the original 1997 Roads 2020 which was an initiative of Main Roads Western Australia and Western Australian Local Government Association (WALGA). The Roads 2025 Development Strategy is available on WALGA website Link to http://www.walga.asn.au/about/policy/infrastructure/roads_2025_dev Roads 2025 includes development strategies for Local Government Roads, State Roads and National Highways up to the year 2025. It does not include Department of Environment and Conservation (DEC) or private industry roads. 2. THIS GRAVEL NEEDS REPORT This report provides an estimate of the road pavement material requirements of the proposals in Roads 2025. The estimate is for base and sub base material but does not include embankment fill material. The estimate is for improvement works only and does not include routine maintenance works. Optional proposals shown in Roads 2025 have been listed in this report but material quantities have not been estimated as they are considered to represent a “wish list” if additional funding was available which is unlikely. The estimates in this Gravel Needs Report were calculated from proposals in the Roads 2025 strategy with additional details obtained from; • Main Roads Western Australia Road Asset Planning Investment Database (RAPID) which defines the strategies for State Roads and National Highways. Available on Main Roads Western Australia – Intranet Site Link to http://rapid/Reports/listAssetLinkPlan.asp • Main Roads Western Australia IRIS database MAIN ROADS Western Australia May 2008 Page 2 of 9 ROAD BUILDING MATERIAL NEEDS.doc 2.1 WALGA DEVELOPMENT STRATEGY – LOCAL ROADS On the WALGA system the road link is identified and the details of the proposed works are shown. See following example. BORDEN – BOXWOOD HILL ROUTE BORDEN –BREMER BAY ROAD (3070146), BORDEN – BOXWOOD HILL ROAD (3180172) Shires of Gnowangerup and Jerramungup LAST REVIEWED: SEPTEMBER 2007 FUNCTION This route currently serves the farming community though this and surrounding areas, as well as providing access for tourists visiting the area. It leads through to Bremer Bay Road and the coastal town of Bremer Bay. Regional Functional Road Hierarchy class for these roads is Regional Distributor. Both of these roads are RAV Network 7 roads (conditional). DEVELOPMENT NEED Most of this route is sealed to a Type 4 standard; however there is a section with a seal width less than 6 m. This can lead to unsafe situations given the size of RAV combinations on this road mixing with normal commuter and tourist traffic. To ensure safety is maintained at a high standard there needs to be some improvements to this route. DEVELOPMENT STRATEGY Widen the formation in the narrow sections and increase the seal width to a Type 4 standard as a minimum level. Monitor the traffic growth, particularly heavy vehicles, with a view to improving this route to a Type 5 standard for long term use. GREAT SOUTHERN ROADS 2025 ROAD DEVELOPMENT STRATEGY 37 Figure 1 The proposal would be to Widen to T4 (refer to Table 1). The proposal to upgrade to T5 was listed as an option, for which the RBM estimates were not included. MAIN ROADS Western Australia May 2008 Page 3 of 9 ROAD BUILDING MATERIAL NEEDS.doc The length of the road would be retrieved from IRIS Local Government Inventory ROMAN by requesting a report using the Road name of number, as shown below in Figure 2. "C:\Program Files\IRIS\IRIS Reporting Centre\IRIS Reporting Centre.exe" BORDEN – BOXWOOD HILL ROUTE BORDEN –BREMER BAY ROAD (3070146) BORDEN – BOXWOOD HILL ROAD (3180172) Figure 2 Borden – Bremer Bay Road length is from 0.00 to 39.72 km. Borden – Boxwood Hill Road length is from 0.00 to 14.98 km. These lengths are used to determine the quantities required by Local Roads in the Regional RBMs estimates. MAIN ROADS Western Australia May 2008 Page 4 of 9 ROAD BUILDING MATERIAL NEEDS.doc 2.2 RAPID – STATE AND NATIONAL HIGHWAYS On the RAPID system the road link is identified and the details of the proposed works are shown in the following example - Figure 3. Proposed Works Project No Committed Project Name Project Description Start and End SLK Pemberton To Widen, reconstruct and 311711 No 0.00 - 27.73 Northcliffe seal 7m wide Figure 3 The proposal would be to Widen to T5 (refer to Table 1) and the section defined by the start and end slk provided. MAIN ROADS Western Australia May 2008 Page 5 of 9 ROAD BUILDING MATERIAL NEEDS.doc 2.3 RATES FOR CALCULATING RBM QUANTITIES TABLE 1 ROAD TYPES Seal Total Thickness Bulking m3 / km m3 / km Road Type Construction Waste & Width Shoulder Width (m) Edge tapers factor (Loose) compacted T1 Unformed road, minimum construction T2 Formed road constructed from surrounding local material T3 Formed road paved with imported gravel material 7.0 0.1 32% 35% 1,247 924 T4 Sealed road (6m seal width) 6.0 1.00 8.0 0.2 32% 35% 2,851 2,112 T5 Sealed road (7m seal width) 7.0 1.25 9.5 0.2 30% 35% 3,335 2,470 T6 Sealed road (8m seal width) 8.0 1.50 11.0 0.2 28% 35% 3,802 2,816 T6 Sealed road (9m seal width) 9.0 1.50 12.0 0.2 26% 35% 4,082 3,024 T7 Sealed road with passing lane 11.5 1.50 14.5 0.2 20% 35% 4,698 3,480 T8 Dual carriageway - divided rural road 8.0 1.50 11.0 0.2 28% 35% 3,802 2,816 NEW 2ND CWAY New 2nd c/way 8.0 1.50 11.0 0.2 28% 35% 3,802 2,816 NEW BYPASS New bypass 9.0 1.50 12.0 0.2 26% 35% 4,082 3,024 NEW T2 New T2 - NEW T3 New T3 7.0 0.1 32% 35% 1,247 924 NEW T4 New T4 6.0 1.00 8.0 0.2 32% 35% 2,851 2,112 NEW T5 New T5 7.0 1.25 9.5 0.2 30% 35% 3,335 2,470 NEW T6 New T6 8.0 1.50 11.0 0.2 28% 35% 3,802 2,816 NEW T6&7 New T6 & T7 11.5 1.50 14.5 0.2 20% 35% 4,698 3,480 NEW T6-9 New T6 (9m wide) 9.0 1.50 12.0 0.2 26% 35% 4,082 3,024 NEW T8 New T8 Dual Carriageway 16.0 1.50 22.0 0.2 28% 35% 7,603 5,632 O/T LANES Overtaking / Passing lanes 3.5 1.50 5.0 0.2 29% 35% 1,742 1,290 UPGRADE- INTERSECTION Upgrade intersection – Quantity is an Assumption. 30% - 1,000 UPGRADE T2 Upgrade to T2 -- UPGRADE T3 Upgrade to T3 7.0 0.1 32% 35% 1,247 924 UPGRADE T4 Upgrade to T4 6.0 1.00 8.0 0.2 32% 35% 2,851 2,112 UPGRADE T5 Upgrade to T5 7.0 1.25 9.5 0.2 30% 35% 3,335 2,470 UPGRADE T6 Upgrade to T6 8.0 1.50 11.0 0.2 28% 35% 3,802 2,816 UPGRADE T6-P Upgrade to T6 & add passing lanes 11.5 1.50 14.5 0.2 20% 35% 4,698 3,480 UPGRADE T6-9 Upgrade to T6 (9m wide) 9.0 1.50 12.0 0.2 26% 35% 4,082 3,024 UPGRADE T7 Upgrade to T7 11.5 1.50 14.5 0.2 20% 35% 4,698 3,480 UPGRADE T7-P Upgrade to T7 & add passing lanes 11.5 1.50 14.5 0.2 20% 35% 4,698 3,480 WIDEN S-P Widen shoulders & add passing lanes 1.00 2.0 0.2 84% 35% 994 736 WIDEN T3 Widen to T3 2.0 1.00 4.0 0.1 40% 35% 756 560 WIDEN T4 Widen to T4 2.0 1.00 4.0 0.2 32% 35% 1,426 1,056 WIDEN T5 Widen to T5 2.0 1.25 4.5 0.2 30% 35% 1,580 1,170 WIDEN T5-P Widen to T5 & add passing lanes 5.5 1.25 8.0 0.2 24% 35% 2,678 1,984 WIDEN T6 Widen to T6 2.0 1.50 5.0 0.2 29% 35% 1,742 1,290 WIDEN T6-P Widen to T6 & add passing lanes 5.5 1.50 8.5 0.2 23% 35% 2,823 2,091 MAIN ROADS Western Australia May 2008 Page 6 of 9 ROAD BUILDING MATERIAL NEEDS.doc 2.4 TOTAL RBM NEEDS – loose volume Table 2 LOCAL ROADS STATE ROADS HIGHWAYS REGIONAL TOTAL (m3) ANNUAL (m3) % of (m3) % of (m3) % of % of USAGE REGION total total total total (m3/year) KIMBERLEY 4,169,929 4.4 1,858,784 2.0 2,283,065 2.4 8,311,778 8.8 488,928 PILBARA 728,464 0.8 2,723,684 2.9 20,681 0.0 3,472,829 3.7 204,284 GASCOYNE 3,329,683 3.5 2,681,708 2.8 0 0.0 6,011,391 6.4 353,611 MID - WEST 8,850,634 9.4 1,090,131 1.2 15,726 0.0 9,956,492 10.6 585,676 GOLDFIELDS- 10,626,883 11.3 3,758,751 4.0 782,613 0.8 15,168,248 16.1 892,250 ESPERANCE WHEATBELT-NORTH 16,483,658 17.5 1,980,669 2.1 1,753,368 1.9 20,217,696 21.4 1,189,276 WHEATBELT-SOUTH 12,303,842 13.0 2,039,180 2.2 0 0.0 14,343,021 15.2 843,707 SOUTH - WEST 6,111,263 6.5 3,047,806 3.2 36,750 0.0 9,195,818 9.8 540,930 GREAT SOUTHERN 7,061,803 7.5 572,242 0.6 0 0.0 7,634,046 8.1 449,062 69,666,160 73.9% 19,752,955 20.9% 4,892,203 5.2% 94,311,318 100.0 MAIN ROADS Western Australia May 2008 Page 7 of 9 ROAD BUILDING MATERIAL NEEDS.doc 3.