An environmental group has accused a Washington sawmill of discharging pollutants from lumber manufacturing and log storage into local waterways contrary to the Clean Water Act.

The Twin Harbors Waterkeeper nonprofit has filed a federal complaint claiming the Sierra Pacific Industries facility in Aberdeen, Wash., has violated water quality standards by releasing contaminated runoff.

A representative of Sierra Pacific Industries did not respond to requests for comment as of press time.

The lawsuit alleges polluted stormwater leaves the sawmill and enters the Chehalis River and eventually Grays Harbor, contributing to “ecological impacts” and breaching the terms of the facility’s Clean Water Act permit.

According to the complaint, the facility lacks best management practices to prevent excessively turbid water and other pollutants from leaving the site and has failed to comply with monitoring and record-keeping requirements.

The lawsuit seeks an injunction prohibiting the company from unlawfully discharging pollutants and asks a federal judge to impose civil penalties of about $66,700 per day of violation.

The plaintiff has also asked to receive regulatory documents from the defendant for three years, among other conditions, and wants to be reimbursed for its attorney fees and other litigation expenses.

In October, Twin Harbors Waterkeeper settled a similar Clean Water Act complaint with a local port and another company operating in Aberdeen, Wash.

Under the terms of that deal, the Port of Grays Harbor and Ag Processing Inc. agreed to jointly pay local Tribes and nonprofits $375,000 for conservation work and $55,000 to the nonprofit for litigation costs.

Ag Processing Inc., a Nebraska-based exporter of soybean products and other farm goods, must also install equipment and improve operations to prevent pollutant discharge.