NC Phase I Perspective Steps undertaken by Charlotte for Post-Construction Controls SC Stormwater Forum May 8, 2007

Charlotte NPDES Facts First NPDES permit in 1993 Third permit renewal being finalized Expect a 2009 deadline for Post construction controls (NC Phase II is ‘07) Over half local streams are impaired –Bacteria, turbidity/sediment, biological NC State Minimum: –Control & treat runoff from first 1-inch –30’ stream buffer on intermittent downstream

Stakeholder Involvement Multi-Objective Process Local government partnership –Mecklenburg and Charlotte, and Towns 36 meetings held over 18 months Multiple objectives considered Consensus reached Elected official decisions ongoing

Stakeholder Process Goals 1.Achieve compliance with the Phase I and Phase II minimum requirements 2.Address the concerns of NCWRC and USFWS for the Yadkin Basin –Federally endangered mussel –Affects permitting for water sewer line expansion –Slows/halts development and annexation 3.Address the causes of impairment 303d & TMDL (key for redevelopment) 4.Address detention measures for the control of storm water volumes and peaks (flooding)

Stakeholder Goal #3 – Recommendations to Address 303d Phase II minimums and NEW development Ordinance applies to redevelopment Other City priorities Areas of compromise Detention & fee-in-lieu for these redeveloping areas Balances competing objectives Impairment reversal through redevelopment

Other Unique Points of Charlotte Draft Ordinance Five watershed districts Phosphorus controls and buy-down program Detention for flooding, including downstream analysis; Also 1-yr volume City maintenance of BMP’s…

City BMP Maintenance and Preparation of Local BMP Manual Construction & maintenance is very important BMP’s built now often have problems Stakeholders/Staff agreed HOA’s are unlikely to be successful Recommended City funded maintenance of SF BMP’s Fee funded – expect 10-15% budgetary impact

City BMP Maintenance and Preparation of Local BMP Manual Charlotte monitors 20 structural BMP’s Monitoring results used to develop local BMP manual –Sizing driven by local monitoring data –Long term operation, inspection, maintenance in mind –Minimize long term costs, maximize success –Prescriptive and gives examples –Equal or better protection than NCDENR manual More info on Char-Meck website

Next Steps Outlying Towns adopt ordinance July ’07 Charlotte still looking at costs of stakeholder version of ordinance City Council to hear details of stakeholder process this summer Possible adoption by Early 2008

Daryl Hammock, PE Water Quality and Environmental Permitting Manager Charlotte Storm Water Services