204517 NOTICE OF DETERMINATION OF NONSIGNIFICANCE (DNS) Whitman County Planning issued a Determination of Nonsignificance (DNS) under the State Environmental Policy Act Rules (Chapter 197-11 WAC) for the following project: Through summer and fall of 2026, Palouse Conservation District proposes to install bioengineered structures to stabilize the streambank along Thorn Creek in the north half of Section 18, Township 19N., Range 43E., W.M., Whitman County, WA. Copies of the SEPA DNS are available at no charge from the Planning Division located on the second floor of the Public Service Building, 310 N. Main Street, Colfax, WA 99111. The public may submit environmentally-focused written comments to the Planning Division which can be submitted in person, by email to Grace Di Biase at grace.dibiase@whitman county.gov, or Alan Thomson at alan.thomson@whitman county.gov, or mailed to: Whitman County Planning Division, P.O. Box 430, Colfax, WA 99111. There is a 14-day comment period for the SEPA DNS which begins Thursday, April 16, 2026, and ends by 5:00 PM Thursday, April 30, 2026. ____________________________ Grace Di Biase Assistant County Planner (SEPA 26-010)