STATE ENVIRONMENTAL POLICY ACT WAC 197-11-970 Determination of Non-Significance

Agency File Number(s): SEPA 2023-01 City of Dayton Shoreline Master Program (SMP) Periodic Review

Applicant: City of Dayton/Clark Posey, 111 S 1st St., Dayton, WA 99328

Project Description: The City of Dayton is proposing updates to the SMP in coordination with Ecology as part of the Shoreline Management Act (SMA) Periodic Review process. The SMP establishes standards for shoreline development. The state SMA requires each jurisdiction with shorelines of the state and shorelines of statewide significance to make and update these rules. The City is proposing to adopt the revised SMP as an update to its 2017 SMP in spring 2023. Proposed amendments to the existing 2017 SMP may be reviewed at

Location of proposal: The updated SMP will apply to all waterbodies under SMA jurisdiction within the City, including floodways; land within 200 feet of the ordinary high water mark (OHWM) of the waterways; and associated wetlands. The SMA regulated waterbody in the City is the Touchet River.

Threshold Determination: The lead agency for this proposal has determined that it does not have a probable significant adverse impact on the environment. An environmental impact statement (EIS) is not required under RCW 43.21C.030(2)(c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. Relevant documents for this project may be viewed during normal business hours at the City of Dayton Planning and Development Department and can be found online at

Comments: Comments may be submitted by email to This email address is being protected from spambots. You need JavaScript enabled to view it., or to Clark A. Posey, Manager at City of Dayton Planning & Development, 111 South 1st Street, Dayton, Washington 99328 This email address is being protected from spambots. You need JavaScript enabled to view it. or email project consultant Sara Noland at Comments submitted will be reviewed and considered by the Coalition and Ecology during the decision-making process. There is no need to submit the same comment to both agencies. Comments must be submitted in writing by 4:30 p.m. on April 27, 2023. Comments will be evaluated to retain, modify or withdraw this DNS.

Date of Issuance: April 13, 2023

Comment Deadline: April 27, 2023

Lead Agency: Columbia County, Washington

Responsible Official: Clark A. Posey, Planning & Development Manager, 111 South 1st Street, Dayton, WA 99328, This email address is being protected from spambots. You need JavaScript enabled to view it., 509-382.2361.

A person may appeal this DNS within 14 days of the close of the comment period. Appellants should be prepared to make specific factual objections. Contact the Planning Department to find out about procedures for SEPA appeals and the submittal process. CCC Chapter 18.05 outlines the appeal process.

Last modified onApril 19, 2023