HLA prepared an engineering report for the Snoqualmie Pass Utility District (District) to address improvements and eliminate use of a forest sprayfield. Phase 1 of the recommended membrane bioreactor (MBR) treatment process will be used as a pilot test to size future facilities and later be converted to process waste sludge.
Improvements included construction of a new MBR treatment process building, new office facilities, and a separate headworks building. Both buildings were constructed to handle the extreme snow loads found at the Pass. MBR equipment was pre-purchased so construction and installation could take place during the short summer season. Phase 1 was completed in 2022.
HLA provided USDA - RD funding application assistance, engineer’s estimate, design, plans, specifications, bidding support, construction survey, inspection, and administration.
Click on the photos below for a larger view.
©2022 HLA Engineering and Land Surveying, Inc. • All Rights Reserved.