Pierce County s Clarks Creek Restoration Plan

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1 Clarks Creek Dissolved Oxygen and Sediment TMDL Pierce County s Clarks Creek Restoration Plan SWAB Update May 19, 2016

2 Federal Clean Water Act CWA establishes that it is illegal to discharge point source pollutants to WOTUS, unless a permit was obtained. EPA's National Pollutant Discharge Elimination System (NPDES) permit program controls discharges. Non-point not subject to the permit program.

3 State Clean Water Act (RCW 90.48) WA State is delegated authority to enforce CWA and manage the NPDES program. RCW states its unlawful to discharge pollutants to waters of the state. State law is the primary instrument used to regulate nonpoint sources.

4 Key Elements of the Program TMDL - Total Maximum Daily Load Determines the maximum amount (load) of a pollutant that a water body can receive and still maintain its designated beneficial uses. (allocates this load to sources in the watershed) Implementation Plan A detailed description of the regulatory and management measures deemed necessary to achieve the pollutant reductions (diet) identified in the TMDL.

5 What Is a TMDL? A TMDL is a Scientific Analysis (using HSPF and QUAL2k modeling ) that: determines the maximum amount (or load) of a particular pollutant that a receiving water body (WOTUS) can receive and still maintain applicable water quality standards Issues Allocations, which are allowable loads assigned to point and nonpoint sources of pollution in the watershed

6 Conceptual TMDL Equation NL + WLA + LA + (MOS + Reserve) = Watershed Pollutant Retention Capacity + Assimilative Capacity of Receiving Water

7 TMDL Timeline Clarks Creek TMDL issued 5/21/14 Clarks Creek TMDL Submitted to EPA 12/12/14 EPA Approved TMDL: 5/27/15 Dispute Resolution Agreement: 6/30/15 Project Initiation Document: 8/31/15 Project Delivery Plan 9/14/15 Tailored Project Scope 9/29/15 Brown and Caldwell Contract 10/22/15 Restoration Plan Submitted 06/30/16

8 Dispute Resolution Agreement (DRA) Plan Scope of Work, Schedule and Criteria for Approval II. June 30 th, Submit Restoration Plan. (May 6 th Draft Circulated for 2 week Internal Review) - Identify and prioritize projects and actions to address stormwater flows (DO) and sediment transport from the County s MS4. - Describe five (5) year re-assessment process to guide remaining TMDL implementation.

9 Required Plan Elements IV.d: Creditable projects and actions include: i. Capital Projects operational since 10/21/03 ii. New Public Water Quality Improvement Projects iii. Private BMPs (retrofit / redevelopment) iv. Enhanced Road Operations v. Enhanced Asset Maintenance Operations vi. Changes to Codes, Rules and Standards vii. In-Stream Restoration Projects

10 The Five (5) Year Re-assessment i. Delineate Urban Planning Catchments ii. Develop improved modeling tools iii. Enhance monitoring for watershed diagnostics iv. Evaluate emerging technologies and strategies v. Use a variety of ecosystem indicators vi. Re-assess the flow and sediment targets (WLAs) vii. Develop the method for tracking and reporting

11 Implementation Plan Road Map Water Quality Standards Compliance Demonstration Design and Implement: TMDL Water 1. Stormwater Quality = Stormwater BMPs = Waste Load Allocations = Quality Standards = Beneficial Uses Improvement Projects (i.e. Apply Technology) (Pollution Diet) Achieved Protected 2. W.Q. Program Actions (Sweeping, Inspections) A Plan Design that Attempts to Create Program Alignment and Policy Accountability through Reasonable Assurance Analysis

12 What is Reasonable Assurance Analysis? Focus on Right Pollutants Design the Right Projects At the Right Scale Construct In the Right Place For the Right Cost Increased Certainty of Outcome (Investment Insurance)

13 Project Management Team Pierce County Surface Water Management Division Water Quality Capital Improvement Program Maintenance and Operations Environmental Planning Communications Roads and Transportation Division Planning and Land Services Department Brown and Caldwell: Project Manager Water Quality Planner Modeling Engineers (Hydrologic, Hydraulic, Sediment, Water Quality) Fluvial Geomorphologist

14 Project Status Update Brown and Caldwell Contract: $249, Invoice Payment Expenditures to Date: $206, Pierce County Expenditure Match: TBD Seven (7) Project Status Update Memorandums since 10/22/15

15 Proposed Five (5) Year WQIP List Clarks Creek Restoration Plan - Capital Projects Implementation Schedule Project Name Woodland Creek 84th St. E. & 72nd Ave. E. Stormwater Treatment System Diru Creek Bank Stabilization Woodland Creek 104th St. E. Stormwater Treatment System Rody Creek Channel Stabilization Diru Creek 67th Ave. E. Water Quality Retrofit Diru Creek 64th Ave. E. Water Quality Retrofit Clarks Creek Project Sampling Clarks Creek Modeling = Construction Year Total by Year Total Estimated Cost $600,000 $600,000 $165,142 $500,616 $665,758 $560,000 $239,000 $40,000 $1,616,478 $2,455,478 $30,000 $67,000 $30,000 $1,170,496 $1,297,496 $117,000 $205,000 $322,000 $117,000 $200,000 $317,000 Total Capital Project Cost $5,657,732 $187,500 $187,500 $187,500 $187,500 $750,000 $117,500 $117,500 Total Cost $235,000 $6,642,732 $560,000 $1,338,642 $1,000,116 $1,951,478 $1,592,496 $200,000

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17 The Good News