Brier issues Determination of Nonsignificance for Stormwater Pipe project

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MyNNN-Logo-w-AllThe City of Brier has issued a Mitigated Determination of Nonsignificance for the Stormwater Conveyance Pipe Replacement project.

The City’s Public Works Department is proposing to replace a length of 18-inch corrugated metal stormwater conveyance pipe that is corroded and failing in the 23600 block of 35th Ave W, Brier.

The length of corroded pipe is unknown at this time. The pipe outfalls to Stream No 56. A 3-foot by 4-foot quarry spall pad will be placed below the pipe for energy dissipation to prevent erosion of the stream bank and to help oxygenate the water. The pipe is full of sediment which will be jetted and vactored to prevent the sediment laden water from entering the stream. All applicable Best Management Practices will be implemented to protect the stream.

There are options for the project in terms of pipe replacement: Option No. 1 is to replace only a short section of pipe, 4-6 feet at the outfall that is corroded. Option No. 2 is to replace 10 to 15 feet of pipe that is corroded to the outfall. Option No. 3 is to replace all 60 feet of pipe back to the type II control structure within the adjoining roadway to the outfall location.

The comment period closes at 5 p.m., Friday, July 10 and the appeal period closes 5 p.m., Friday, July 24. For more information contact: Nicole Gaudette, City Planner. Send comments to: City of Brier Attn: City Clerk 2901 228th St SW Brier, WA 98036

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