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Greenville County Storm Water Management Program Greenville County, SC Land Development Division NPDES MS4 Permit Implementation Construction/Post Construction.

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Presentation on theme: "Greenville County Storm Water Management Program Greenville County, SC Land Development Division NPDES MS4 Permit Implementation Construction/Post Construction."— Presentation transcript:

1 Greenville County Storm Water Management Program Greenville County, SC Land Development Division NPDES MS4 Permit Implementation Construction/Post Construction Program K.F. Holbrook, PE Woolpert, Inc. Construction Site Runoff Stormwater Management in Greenville County May 30, 2007 Furman University, Greenville, SC Future of the Construction and Post Construction Water Quality Program

2 Greenville County Storm Water Management Program In the Beginning (1994) Simple Program Simple Program Followed State Law and Regulations Followed State Law and Regulations Peak rate control Peak rate control Velocity control Velocity control Sediment control Sediment control Program operated by the SWCD Program operated by the SWCD

3 Greenville County Storm Water Management Program Program Evolution In 2000 Greenville County issued MS4 Storm Water Permit In 2000 Greenville County issued MS4 Storm Water Permit Ordinance revised to include authorities for implementation Ordinance revised to include authorities for implementation Program audit to set baseline performance Program audit to set baseline performance Automated permit tracking system implemented Automated permit tracking system implemented Computerized field inspection systems implemented Computerized field inspection systems implemented EPA evaluation of the MS4 program EPA evaluation of the MS4 program Flood protection projects initiated Flood protection projects initiated Program reorganized into Public Works Program reorganized into Public Works Second cycle NPDES permit effective July 2007 Second cycle NPDES permit effective July 2007 TMDL’s developed for Enoree and Reedy TMDL’s developed for Enoree and Reedy Ordinance revisions required Ordinance revisions required Cites become co-permittees Cites become co-permittees

4 Greenville County Storm Water Management Program

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9 Process Project Application logged upon receipt Project Application logged upon receipt Assigned to Plan Review Assigned to Plan Review Plan Review conducted comments provided Plan Review conducted comments provided For Subdivisions three iterations before permit For Subdivisions three iterations before permit For Commercial two iterations before permit For Commercial two iterations before permit Preconstruction meeting prior to issuing permit Preconstruction meeting prior to issuing permit SCDHEC approval for NPDES required SCDHEC approval for NPDES required Permit issued Permit issued Plans and Documents handed off to the inspectors for follow up Plans and Documents handed off to the inspectors for follow up Site inspections for compliance begin Site inspections for compliance begin Each site is inspected once every two weeks Each site is inspected once every two weeks Upon final stabilization project is closed and CO issued Upon final stabilization project is closed and CO issued

10 Greenville County Storm Water Management Program GREENVILLE COUNTY STORMWATER PROGRAM YEAR # APPLICATIONS # PROJECTS # INSPECTIONS 2003303169955 20043111752575 20053051553147 20063221142030 YEARLY AVERAGE 3101532117

11 Greenville County Storm Water Management Program

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13 PROJECTS BY DISTURBED AREA PROJECTS BY DISTURBED AREA DISTURBED AREA # PROJECTS 0 - 4.99 Acres 374 5 - 9.99 Acres 84 10 - 14.99 Acres 67 15 Acres and larger 96 TOTAL PROJECT AREA 25,792 ACRES 25,792 ACRES TOTAL REPORTED DISTURBED AREA 5,068 ACRES 5,068 ACRES

14 Greenville County Storm Water Management Program More Stats YEAR # COMPLAINTS 200469 2005132 200666

15 Greenville County Storm Water Management Program What is in the Future Staff analysis and assessment for meeting program needs Staff analysis and assessment for meeting program needs New enforcement procedure New enforcement procedure Improved complaint management Improved complaint management Improved permit and inspection tracking Improved permit and inspection tracking Third party inspection requirements Third party inspection requirements New application/inspection fee structure New application/inspection fee structure Implementation of TMDL requirements Implementation of TMDL requirements New ordinance revisions for water quality New ordinance revisions for water quality Credit policy modifications for enhanced maintenance Credit policy modifications for enhanced maintenance Updated design manual Updated design manual Design tool development Design tool development BMP development BMP development

16 Greenville County Storm Water Management Program Storm Water Management Design Manual Greenville County Storm Water Management Design Manual

17 Greenville County Storm Water Management Program Question/Comments Construction Site Runoff

18 Greenville County Storm Water Management Program Field Protocol 2 Field Auditors 2 Field Auditors Traversed entire site using the original erosion control plans as a guide Traversed entire site using the original erosion control plans as a guide Collect Data on Rugged Pentop Computers Collect Data on Rugged Pentop Computers Store data in database specifically design for field review Store data in database specifically design for field review Digital Pictures of Site and BMPs Digital Pictures of Site and BMPs Construction Site Runoff

19 Greenville County Storm Water Management Program Sediment Basins Construction Site Runoff

20 Greenville County Storm Water Management Program Sediment Basins Construction Site Runoff

21 Greenville County Storm Water Management Program Basin Outlet Structures Construction Site Runoff

22 Greenville County Storm Water Management Program Basin Outlet Structures Construction Site Runoff

23 Greenville County Storm Water Management Program Temporary Sediment Traps Construction Site Runoff

24 Greenville County Storm Water Management Program Silt Fence Construction Site Runoff

25 Greenville County Storm Water Management Program Rock Ditch Checks Construction Site Runoff

26 Greenville County Storm Water Management Program Riprap or Aggregate Construction Site Runoff

27 Greenville County Storm Water Management Program Outlet Protection Construction Site Runoff

28 Greenville County Storm Water Management Program Stabilized Construction Entrance Construction Site Runoff

29 Greenville County Storm Water Management Program Storm Drain Inlet Protection Construction Site Runoff

30 Greenville County Storm Water Management Program Pipe Slope Drains Construction Site Runoff

31 Greenville County Storm Water Management Program Runoff Control Measures Construction Site Runoff

32 Greenville County Storm Water Management Program Straw and Hay Bale Applications Construction Site Runoff


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