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Water Quality Program

Historical Permit Information

2017 permit modification

A public comment period on the permit permit modification began December 7, 2016 and ended March 7, 2017.

2014 permit

A 45-day public comment period on the draft permit and Environmental Impact Statement (EIS) began January 2, 2014 and ended February 15, 2014.

A public workshop and hearing was held on, Saturday, February 1, 2014. During the hearing Ecology presented information on the draft permit and accepted oral comments on the draft permit and EIS.

Public Comment Documents

On June 18-19, 2013 the Shorelands and Environmental Assistance Program of Ecology sponsored a science and policy forum to discuss the science and management of Zostera japonica in Washington. A summary of the meeting conclusions as well as meeting materials may be accessed here: Non-Native Eelgrass: Zostera japonica.

Ecology held an informational public meeting on Dec. 6, 2012, to discuss the possible development of a general permit for Zostera japonica management on commercial clam beds in Willapa Bay.

Risk Assessment of the Herbicide Imazamox

Frequently Asked Questions

Permit Development Public Comments (November 2012)

Permit Development Public Comments (March 2012)

Ecology proposed to issue a general permit for the application of the aquatic herbicide imazamox to control Zostera japonica on commercial clam beds in Willapa Bay. Based on comments on Ecology’s earlier proposal to issue a permit for all commercial shellfish beds, Ecology narrowed the scope of the proposed permit to include only commercial clam beds (excluding geoduck culture) in Willapa Bay in Pacific County.

These management activities may result in the discharge of the aquatic herbicide imazamox and marker dye to surface waters of the state of Washington in Willapa Bay. Ecology issued a scoping notice for an Environmental Impact Statement (EIS) to cover this activity. Ecology requested comments from the public about whether or not it is appropriate for Ecology to develop a permit for this activity. The comment period for this revised permit proposal was from October 3, 2012 through November 2, 2012.

Determination of Significance and Environmental Impact Statement Scoping Notice

Public Notice of Proposed Permit (October 3, 2012)

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Picture of a Willapa Bay Zostera japonica eelgrass bed from Dr. Kim Patten
Zostera japonica bed photo by Dr. Kim Patten

Focus Sheet: Control of non-native eelgrass (Zostera japonica) on commercial shellfish beds in Willapa Bay

State NWCB Zostera japonica noxious weed listing

Aquatic Pesticide NPDES Permit ListServ