HR Green named an ACEC-IA Award Winner
HR Green has been named an ACEC-IA award winner for work performed for the Iowa Great Lakes Sanitary District (IGLSD) on the Van Steenburg Estates Sanitary Sewer Relocation. HR Green completed preliminary study, final design, and construction phase services for this project. The Van Steenburg Estates sanitary sewer serves 24 residential properties.
IGLSD had wanted to address sewer relocation project for some time in order to resolve accessibility issues and eliminate permanent easement in middle of residential properties. During cleaning of a line they noticed that cracks were starting to appear so the project was accelerated. The project relocated the existing 50-year old eight inch gravity sanitary sewer that runs through residential properties in the Van Steenburg Estates on the western shore of West Okoboji Lake.
Approximately 2,000 feet of new 12-inch vitrified clay pipe (VCP) sanitary sewer main was installed in the ROW of Highway 86 using pilot-tube micro-tunneling (PTMT) trenchless construction method. Eight manholes were installed within the Highway 86 ROW located the PTMT boring pits. Twenty-four four-inch sanitary sewer service lines were installed via horizontal directional drilling (HDD) and reconnected to the existing individual sanitary sewer services at each residence using an innovative approach that completed the connection entirely from the exterior of each structure.
No properties were without sewer service as the new sewer system was constructed. The trustees of the Sanitary District had this project on a priority list for several years and wanted to do the project for the protection of public health, as well as water quality of West Okoboji Lake. The Iowa Great Lakes Sanitary District (IGLSD) serves the wastewater collection and treatment needs for seven Iowa cities: Spirit Lake, Arnolds Park, Okoboji, West Okoboji, Wahpeton, Orleans and Milford, and the unincorporated areas in the region around the Iowa Great Lakes in Northwest Iowa