During a routine test on its raw water supply, the City of Bellevue discovered radium levels, while within the limits set by the EPA, were borderline high in terms of acceptability to the City. IIW worked with the City to determine a Radium Removal Facility would be needed to mitigate the high radium levels.
The Radium Removal Facility will house vertical pressure filters that utilize the addition of hydrous manganese oxide (HMO) to the raw water to remove radium from the City’s two wells. The chemicals will be injected into the treated water in one location in lieu of the two separate well waterworks buildings they currently use.
Water main will be installed with the project to route raw water from the wells to the facility. Various process piping and chemical addition will also be installed.
The site selected for the facility had very poor soils. A special foundation was designed, utilizing steel piles and pile caps, to prevent substantial settling from occurring.
IIW assisted the City in applying for a 75% forgivable loan for the project through the Iowa DNR. The City was awarded the loan to construct the facility. IIW also worked with the City to apply to the IDNR for SRF funding to cover the remaining cost of the project. We assisted the City in completing a PER, IUP application, and Environmental Review documents necessary for applying for SRF funding. Once submitted, IIW worked with the IDNR to get final approval for the funding.
IIW is providing architectural; structural, civil, and municipal engineering; and land survey for the project. IIW will be providing construction administration and construction observation services during construction. Construction of the project will be completed in 2019.