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SECTION 6 Integrated Stormwater Management Strategy The purpose of this section is to summarize the flood control, water quality, and stormwater related natural resource elements of the integrated stormwater management strategy for the River Road Santa Clara basin as they were presented in Sections 3.0, 4.0, and 5.0 respectively. The capital project elements of the stormwater management strategy are shown on Figures 3 -2 through 3 -8. These CPs and development standard strategies are summarized in subsection 6.1. Subsection 6.2 provides a summary of strategy benefits and subsection 6.3 provides a summary of strategy implementation and costs. 6.1 CP and Development Standard Strategies Flood Control Strate2y Two categories of flood control capital projects were identified for implementation. The first category of flood control CPs were identified to address predicted capacity deficiencies. These projects are listed as follows: Al -1: Open Channel Improvements: Regrade the existing open channel segment (RSA1090B) from node 72789 to 78790 (18'). Al -2: Flood Control (Culvert Replacement) at Irving Road and Gent Road: Upsize and replace the existing 36" CMP culvert (RSA1090A) with a 48" CMP culvert. Al -3: Flood Control (Storage) at Prairie Road and Beltline Road: Construct storage facilities at nodes 72782 and 72102 to provide a total of 85 acre -ft of storage. Al -4: Flood Control (Culvert Replacement) at Prairie Road and Beltline Road: Upsize and replace the existing 24" CMP culvert (RSA1100I) with a 36" CMP culvert. Al -5: Flood Control (Culvert Replacement) South of Irving Road: Upsize and replace the existing 3 -24" CMP culverts (RSA1090E) with a 2' x 8' box culvert. Al -6: Flood Control (Culvert Replacement) at Carol Avenue: Upsize and replace the existing 24" CMP culvert (RSA1060L) with a 2' x 4' box culvert. Al -7: Flood Control (Culvert Replacement) at Kelso Street: Upsize and replace the existing 18" and 24" CSP culverts (RSA1060G) with a 2' x 4.5' box culvert. Al -8: Flood Control (Storage) at Maxwell Road West of N. Park Avenue: Construct storage facilities at nodes 72725 and 59020 to provide a total of approximately 135 acre -ft of storage. Al -9: Al Channel Survey: Conduct survey of open channel segments to identify available storage above the top of banks. FC -1: Flood Control (Culvert Replacement) at Calla Street: Upsize and replace the existing 3 -12" CSP culverts (RSFCO50D) with a 1.5' x 5.0' box culvert. SC -1: Flood Control (Culvert Replacement) at Katy Lane: Upsize and replace the two existing 30" CSP culverts (RSSCO50B) with a 12' long pedestrian bridge. WO -1: Flood Control (Culvert Replacement) East of Azalea Dr.: Upsize and replace the existing 18" CMP culvert (RSWO070D) with a 66" CSP culvert. WO -2: Flood Control (Culvert Replacement) East of Edgewood Dr.: Upsize and replace the existing 36" CSP culvert (RSWO110A) with a 60" CSP culvert. WO -3: Flood Control (Culvert Replacement) East of Yvonne St.: Upsize and replace the existing 48" CSP culvert (RSWO080A) with a 66" CSP culvert. 0:\25695978 Eugene RR -SC Final Basin P1an\Master P1anTINAL 2- 2010\Master_Plan 3- 11- 10_FINAL_ Word _Version.doc 6-1