Elk River TMDL

Background

In 1998 the North Coast Regional Water Quality Control Board (Regional Water Board) and the U.S. Environmental Protection Agency listed the Elk River Watershed under the Clean Water Act Section 303(d) as a sediment-impaired waterbody.

Sediment discharges and sedimentation exceeded the water quality objectives for sediment, suspended material, settleable matter, and turbidity resulting in adverse impacts to several beneficial uses, including domestic water supplies (MUN), agricultural water supplies (AGR), cold water habitat (COLD); spawning, reproduction and early development (SPWN); rare, threatened, or endangered species (RARE), and recreation (REC-1 and REC-2). Sedimentation has also resulted in conditions of nuisance, including elevated rates of annual flooding, loss of property, loss of use of property, loss of access to property, and risk to human health and welfare.

Overview

In 2016, the Upper Elk Sediment Total Maximum Daily Load Action Plan (Action Plan) was adopted by the North Coast Regional Water Quality Control Board (Resolution No. R1-2016-0017). The Action Plan was approved by the State Water Resources Control Board in 2017 (Resolution No. 2017-0046), and was approved by the Office of Administrative Law and approved by the United States Environmental Protection Agency in 2018.

The goals of the Action Plan are to achieve sediment related water quality standards, establish a sediment load, identify a process for assessing and implementing remediation and restoration actions, and describe a program of implementation.  The Action Plan was incorporated in the Water Quality Control Plan for the North Coast Region (Basin Plan) and identified three elements to achieve its goals: permitting of discharges of waste, an Elk River Recovery Assessment, and a Watershed Stewardship program. 

Additional information on each of these elements is included in the “Implementation” section below. Additional information on TMDLs is available from both the State Water Resources Control Board TMDL Program and the North Coast TMDL Program.

Map showing the impacted reach of the Elk River watershed Map showing the impacted reach of the Elk River watershed