NCDOT Falls Lake Stormwater Program Overview
The NCDOT Falls Lake Stormwater Program outlines reduction objectives, rules, and requirements for new and existing developments to improve water quality in Falls Lake. The program aims to achieve specific nutrient reduction targets and implement stormwater management practices to meet regulatory standards by designated timelines.
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Presentation Transcript
APPROVAL OF NCDOTS FALLS LAKE NEW & EXISTING DEVELOPMENT STORMWATER PROGRAM & DELEGATION OF FUTURE APPROVAL Environmental Management Commission January 2014
Falls Lake Strategy -Overview Rules Effective January 2011 Reduction objectives: 40% TN 77% TP Baseline: 2006 Staged Implementation Stage I (2011- 2021) Initial reductions watershed wide Achieve standards in lower lake Stage II (2021 2036) Additional reduction in upper watershed Achieve standards throughout lake by 2041
Falls Lake Rules (15A NCAC 2b) .0275 Purpose and Scope (Goals) .0276 Definitions .0277 Stormwater New Development .0278 Stormwater Existing Development .0279 Wastewater Discharges .0280 Agriculture .0281 Stormwater State & Federal Entities .0282 Trading
State & Federal Entities Rule Falls (.0281) Stormwater requirements for state & fed lands Applies to NCDOT & Non-DOT Entities Similar to requirements for local governments New Development -N & P loading export targets Existing Development -% reduction goals Accounting tool Modified Jordan / Falls Lake Stormwater Nutrient Accounting Tool (JLSLAT)
NCDOT Requirements (.0281 ) Implement Single Stormwater Mgt. Program For New Development & Existing Development New Development Non-Road Projects: 2.2 lbs/ac/yr TN & .33 lbs/ac/yr TP New DOT Road Projects meet buffer requirements Existing Development Stage I: Reduce loads back to 2006 baseline Stage II: Achieve overall N & P % reductions Minimum of 6 stormwater retrofits per year Annual Reports
NCDOT Implementation Timeline January 2011 - Rules Adopted July 2012 EMC Approved NCDOT Accounting Tool & Baseline Loads July 2013 NCDOT Submitted New & Existing Dev. Stormwater Program January 2014 DWR makes recommendations to EMC January 15, 2014 DOT Implements EMC Approved Stormwater Program
NCDOT New Development Program Elements Post-construction runoff control New Roads & Non-Road Development Process for DWR review of projects Delineate scope of vested projects Define lower thresholds of significance
NCDOT Existing Development Program Elements Nutrient Loads for Baseline & Interim Development Baseline Loads Approved by EMC July 2012 Interim Load Calculations Implementation Rate & Schedule of BMPs Stormwater System Inventory & Prioritization Illegal Discharge Detection & Elimination Fertilizer Management Education
NCDOT Existing Development Interim Loading Development between Jan. 1, 2007 Jan. 15, 2014 Method Post-Dev. load vs. uniform Pre-Dev. load Uniform annual load option provided in rule Result: Net Decline In Interim Development Loads 99% of interim development secondary roads Low road runoff concentrations Does not change BMP implementation rate
Annual Reporting Required for both New & Existing D. Summarize Implementation Activities Types of projects Describe measures implemented & offset payments Reductions achieved Submitted in conjunction with NPDES Report
Recommendations Staffs request the Committee recommend that the Commission approve NCDOT's Falls Stormwater Program as meeting the minimum requirements established in Item (9) of the rule. Staff also requests the Committee recommend that the Commission approve delegation of authority to the Director to approve any subsequent program amendments that the NCDOT may propose in the future.
QUESTIONS? John Huisman - NC Division of Water Resources Nonpoint Source Planning Unit John.Huisman@ncdenr.gov 919-807-6436
