Environmental Management Commission January 2014 Approval of NCDOT’s Falls Lake New & Existing Development Stormwater Program & Delegation of Future Approval Good afternoon chairman Elken and members of the committee. My name is John Huisman. I work in the Nonpoint Source Planning Unit of the planning section here at DWQ. I am here today on behalf of the Falls Lake Watershed Oversight Committee to request approval of Agriculture Nutrient Tracking & Accounting Methods for the Falls Lake Watershed. I am also joined by my colleague and fellow WOC member Kelly Ibrahim with the Division of Soil & Water Conservation who has graciously agreed to assist in answering any questions you may have following the presentation. I would like to point out that the Water Quality Committee saw a similar presentation at your July meeting when you approved the Ag accounting tools for the Jordan Watershed. The accounting methods I will review today are similar to those you approved for Jordan in July with slight variations given the different reduction needs in between the two watersheds. Environmental Management Commission January 2014

Background The Falls Lake Watershed is located in the upper portion of the Neuse River basin. It is 770 square Miles in size spans portions of six counties (Wake, Durham, Orange, Granville, Person, and Franklin). And includes portions of seven municipalities Raleigh, Durham, Hillsborough, Creedmoor, Butner, Roxboro, Stem. The lake serves as a water supply to over 450,000 residents in Wake County. For the purpose of discussing the strategy, the Upper watershed is defined as the areas of the watershed draining to the portion of the lake above NC-50. The lower watershed is the portion of the watershed draining to the the portion of the lake below NC-50 The lake is currently listed on the EPA 303d list for chl-a violations throughout the lake. Senate Bill 981 – Charged the EMC with adopting NMS no later than January 2015

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 Division requests that the Commission approve NCDOT's Falls Stormwater Program as meeting the minimum requirements established in Item (9) of the rule. Staff also requests delegation of authority to the Director to approve any subsequent program amendments that the NCDOT may propose in the future. The Director would forward unique future program revisions of concern to the Water Quality Committee for review.

Questions? John Huisman - NC Division of Water Resources Nonpoint Source Planning Unit John.Huisman@ncdenr.gov 919-807-6436