HEI provided planning, design, and project management for a nitrate remediation project.  Our work included: initial feasibility study for combining 3 separate adjacent water systems; comprehensive water system plan for the newly combined water system composed of up to 80 residential connections; application for and management of grant and loan funding; construction and bid documents for a new domestic water system including new well, reservoir, pressure booster station, and distribution system; construction management for two phases of construction; source approval and water right change applications; and overall project management.  A major portion of the funding came through the Community Development Block Grant Program (CDBG) of Franklin County, Washington which amounted to $670,000.  The Washington Department of Health also participated with a planning grant to assist in the combining of the 3 water systems.

Over the course of 15 years, HEI has completed a range of projects for the 120 users of the Columbia View Water System.  These projects have included: planning documents such as Engineer's Project Reports for Nitrate Remediation, and writing and updating the Comprehensive Water System Plan; construction and bid documents for water system upgrades (new fire hydrants, booster station controls, and new water lines) and for a new distribution system; and project and construction management.  In 2007 and 2008, HEI worked with Columbia View and the Port of Walla Walla to develop an agreement in which Columbia View would purchase domestic water from the Port of Walla Walla's new nitrate treatment system.  Construction of the new domestic distribution system finished in November 2009.

Our scope of work for this farmworker housing project included: design and construction documents for a new Group A-TNC water system; ion exchange nitrate treatment system design; and source approval application.

North Slope Estates Property Association is a Group A water system that serves 28 single-family residences. This ongoing project began with an Engineer’s Project Report for Arsenic Remediation. Construction of the arsenic treatment system and water system improvements is underway. Water system improvements include: a new well pump and riser pipe; electrical system replacement, reservoir repairs and upgrades; and replacement of distribution system valves and blow-offs.

Our relationship with Wallula Water District 1 started in 2007 with an Engineer's Project Report for Arsenic Remediation.  In that report, HEI recommended that Wallula construct a new well to remediate their high arsenic.  Our work with Wallula toward implementing that recommendation has included: completion of a Small Water System Management Plan; application for a Drinking Water State Revolving Fund loan; coordination with Walla Walla County for application of a Community Development Block Grant (CDBG) Program General Purpose Grant; creation of an environmental review record; application for water right change; and design drawings and bid documents for well construction.  Additional work will include design of water system improvements (including a new reservoir, standby generator, booster station improvements, and security), as well as construction and general project management.  Project funding has included a CDBG grant of $802,335 through Walla Walla County and a Drinking Water State Revolving Fund Loan of $331,684.  Construction of the new well is underway.