This concern will be evaluated as part of the application review process. Water quality will be reviewed under Snohomish County Code and the Drainage Manual. More information about water quality stormwater requirements can be found here. The subject application was routed to the Snohomish Health District (SHD) for comment. SHD will assist the County by providing records related to existing wells and associated well protection zones. All comments will be provided to the applicant to address and provide responses back to the County.
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The project will be reviewed for compliance with Snohomish County Critical Area Regulations (chapters 30.62A, B, and C) dealing with wetlands, streams, wildlife, geologically hazardous areas, and Critical Aquifer Recharge Areas. In addition, compliance with chapter 30.63A SCC drainage will be evaluated.
Environmental review by Snohomish County is ongoing. The Stillaguamish Tribe has indicated on their SEPA Checklist that the following environmental information was prepared for the project: December 22, 2017 Geotechnical Engineering Report, October 2017 Purdy Restoration Site Preliminary Advanced Mitigation Credits Calculation and Monitoring Plan, December 2013 Preliminary Jurisdictional Determination and Wetland Delineation, May 2017 Technical Memorandum, Additional 236th Street NE Improvement Project, July 24, 2017 Archaeological Investigation Report 236th NE Improvement Project, and 018 Biological Evaluation. Snohomish County received the following environmental information with the current LDA submittal: March 19, 2019 Critical Areas Report update by Cardno, February 13, 2018 Geotechnical Engineering Report by Geotest, November 2019 Drainage and Erosion Control Plan by SCJ Alliance, June 6, 2019 Groundwater Monitoring and Supplemental Explorations Memorandum by Geotest, June 2018 Intersection/Gap Analysis by Gibson Traffic Consultants, Inc., and November 2019 Illumination Design Report by SCJ Alliance.
De-watering of a stream typically is a construction method to isolate the work area within the stream corridor when stream flow is diverted around the construction site as to maintain stream flow while protecting water quality. This is typically employed when stream culverts are being replaced under the roadway.
Snohomish County, Washington State agencies such as Washington Department of Fish and Wildlife, Army Corps of Engineers (ACOE), and the Department of Ecology with jurisdiction are involved. During construction the site will be inspected frequently to ensure the project follows the approved plans.
The Stillaguamish Tribe has a timeline posted on their web site at www.stillaguamish.com. Timelines are often in flux given other authorizations required from agencies and their timelines and in-water work windows.
Yes. A June 2018 Intersection/Gap Analysis by Gibson Traffic Consultants, Inc. was included in the LDA submittal.
Yes. Upon submittal of the LDA application to Snohomish County notice was given to the school district requesting comments. Any concerns from the district will be evaluated.
Yes. ESA consultation will occur with the ACOE as a Nationwide Permit 14 will be required. Additionally, chapter 30.62A SCC (Critical Area Regulations) involves review for any ESA species located on-site.
Stream flow and hyporheic groundwater interception is reviewed as part of the application when utilities are proposed adjacent to a waterbody.
Accessibility and access for emergency vehicles will be reviewed with the application by our Traffic Operations Group in Public Works. A road closure plan is required. In the process of evaluation.