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Falls Lake Nutrient Management Strategy Overview

This document outlines the Adaptive Implementation Strategy for Falls Lake, including monitoring, reporting, and recommendations to the Environmental Management Commission (EMC), addressing water quality issues. Consultation with local governments and stakeholders is a key aspect.

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Falls Lake Nutrient Management Strategy Overview

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  1. TJCOG - June 26, 2012 Overview of Falls Lake Nutrient Management StrategyADAPTIVE IMPLEMENTATION

  2. Falls Lake Adaptive Implementation - .0275(5) • Monitoring - .0275 (5)(a) • Division shall perform WQ monitoring throughout reservoir • Shall accept WQ data by other parties • Must meet Division standards & quality assurance protocols • Evaluate use support determinations to judge progress • Segments listed in Sub-Items (5)(a)(i) - (5)(a)(vii)

  3. Falls Lake Report to EMC - .0275(5)(b) • Report to EMC and public every 5 yrs starting in 2016 • Address uncertainties & advances in technology • Changes in nutrient loading to reservoir • State of wastewater and stormwater N&P control technology • Use & projected use of wastewater reuse & land application • Utilization of nutrient offsets & projected changes • Assessment of instream benefits of programmatic measurers

  4. Falls Lake Report to EMC - .0275(5)(b) Continued • Results of any studies evaluating: • Changes in atmospheric deposition • Instream loading changes resulting from implementing rules • Loading from conventional septic systems and discharging SF • Loading from groundwater • Updates to nutrient loading accounting tools

  5. Falls Lake Report to EMC in 2025 - .0275(5)(c) • Shall address the following • Physical, chemical, and biological conditions of Upper Lake • Whether alternative regulatory action is sufficient to protect • Impact on reservoir management on WQ in Upper Lake • Compliance methodology & potential for alt methods • Feasibility of achieving Stage II objective • Costs & Benefits of achieving Stage II objective

  6. Falls Lake Reports to EMC - .0275(5)(d)(e) • The Division shall make recommendations, if any on rule revisions based on the information reported • In developing the reports, the Division shall consult with and consider information submitted by local governments and other persons with an interest in Falls Lake

  7. Falls Lake Supplemental Modeling- .0275(5)(f) • A person may develop & submit a supplemental model based on additional data for EMC approval • Shall obtain Division review and approval of monitoring study plan & modeling framework • Shall meet Division requirements for data quality and model support/design • Supplemental model shall include a minimum of three years of lake WQ data

  8. Falls Lake Supplemental Modeling- .0275(5)(f) • EMC May Accept modeling products that include: • Range of combination of N&P % load reductions needed to meet the goal of the Falls NMS • Allowable loads to Falls lake from the five upper subwatersheds • Division shall assure supplemental modeling is conducted in accordance with quality assurance requirements • EMC may initiate rulemaking to establish those allowable loads as the revised objective of Stage II

  9. John Huisman - NC Division of Water Quality Nonpoint Source Planning Unit John.Huisman@ncdenr.gov 919-807-6436 DWQ Falls Lake Website: http://www.fallslake.org Questions?

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