Unalakleet Public Water System
Start Date: June 2011.
End Date: March 2014
Project Location: Unalakleet, Alaska
The City of Unalakleet public water system utilizes a surface water source containing elevated levels of organics. The communities existing water treatment plant employed a direct filtration process that did not provide organics removal, resulting in finished water with elevated disinfectant byproducts. Additionally, the system had limited capacity to meet the summer water demands exerted by the local fish processing plant. CRW lead the effort to upgrade the water treatment plant to include a new direct filtration process featuring additional treatment capacity, a coagulant injection system targeting organics removal, and a pH adjustment system. CRW in conjunction with the Village Safe Water program, performed engineering services for all phases of the project including preliminary jar testing, a pilot study, and design of the proposed upgrades, procurement, construction administration, project startup, and project closeout. Following startup of the new system DBP levels in the distribution system were sampled at levels well below their MCLs.