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Future of the Construction and Post Construction Water Quality Program Greenville County, SC Land Future of the Construction and Post Construction Water Quality Program Greenville County, SC Land Development Division NPDES MS 4 Permit Implementation Construction/Post Construction Program K. F. Holbrook, PE Woolpert, Inc. Stormwater Management in Greenville County May 30, 2007 Furman University, Greenville, SC Greenville County Storm Water Management Program Construction Site Runoff

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

Program Evolution n n n In 2000 Greenville County issued MS 4 Storm Water Program Evolution n n n In 2000 Greenville County issued MS 4 Storm Water Permit Ordinance revised to include authorities for implementation Program audit to set baseline performance Automated permit tracking system implemented Computerized field inspection systems implemented EPA evaluation of the MS 4 program Flood protection projects initiated Program reorganized into Public Works Second cycle NPDES permit effective July 2007 TMDL’s developed for Enoree and Reedy Ordinance revisions required Cites become co-permittees Greenville County Storm Water Management Program

Greenville County Storm Water Management Program Greenville County Storm Water Management Program

Greenville County Storm Water Management Program Greenville County Storm Water Management Program

Greenville County Storm Water Management Program Greenville County Storm Water Management Program

Greenville County Storm Water Management Program Greenville County Storm Water Management Program

Greenville County Storm Water Management Program Greenville County Storm Water Management Program

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

GREENVILLE COUNTY STORMWATER PROGRAM YEAR # APPLICATIONS # PROJECTS 2003 303 169 955 2004 GREENVILLE COUNTY STORMWATER PROGRAM YEAR # APPLICATIONS # PROJECTS 2003 303 169 955 2004 311 175 2575 2005 305 155 3147 2006 322 114 2030 YEARLY AVERAGE 310 153 2117 Greenville County Storm Water Management Program # INSPECTIONS

Greenville County Storm Water Management Program Greenville County Storm Water Management Program

Greenville County Storm Water Management Program Greenville County Storm Water Management Program

PROJECTS BY DISTURBED AREA # PROJECTS 0 - 4. 99 Acres 374 5 - PROJECTS BY 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 TOTAL REPORTED DISTURBED AREA 5, 068 ACRES Greenville County Storm Water Management Program

More Stats YEAR # COMPLAINTS 2004 69 2005 132 2006 66 Greenville County Storm More Stats YEAR # COMPLAINTS 2004 69 2005 132 2006 66 Greenville County Storm Water Management Program

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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