Iowa City Community School District Bidopportunities #26-02 Cal883229BN & BS (Calhoun)

Construction of Pumped Nutrient Reduction Wetlands with Solar Powered Pumping Systems in Calhoun County, Iowa

This opportunity involves the construction of two pumped nutrient reduction wetlands in Calhoun County, Iowa, for the Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and Water Quality. - Government Buyer: - Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and Water Quality - Key contacts include Jake Hansen (Chief, Water Resources Bureau) and Mike Bourland - Project Scope: - Construction of Cal883229BN-North and Cal883229BS-South wetlands - Major work includes selective clearing, excavation (over 41,000 cubic yards total), grading, and earthfill - Installation of lift stations with solar powered, submersible axial-flow pumps (design rates 1.6–1.7 CFS), battery systems, and electrical controls - Installation of force mains, tile, inlet risers, water control structures, drawdown pipes, riprap, turf reinforcing mats, silt fences, and extensive seeding - North site: 31,200 CY earthwork, 833 LF polyethylene pipe, 92 LF PVC SCH-80 forcemain, 177 LF CMP drawdown pipe, 330 tons riprap/stone, 560 SY turf mat, 472 LF silt fence, 16.6 acres seeding - South site: 10,300 CY earthwork, 210 LF polyethylene pipe, 27 LF PVC SCH-80 forcemain, 114 LF CMP drawdown pipe, 250 tons riprap/stone, 395 SY turf mat, 304 LF silt fence, 1.0 acre seeding - Products and Materials: - Lift stations with solar powered pumps and battery systems (total 3) - Polyethylene and PVC piping (various diameters and lengths) - Corrugated metal pipe (CMP) for drawdown and water control structures - Riprap, clean stone, turf reinforcing mats, silt fences - Seeding for wetland structures and buffers - Unique/Notable Requirements: - Use of solar powered pumping systems with remote monitoring and battery backup - Compliance with NRCS standards and detailed engineering specifications (by Shive-Hattery, Inc.) - Tax-exempt purchase of construction materials - 100% performance/payment bond required - Strict deadlines for construction and seeding - OEMs and Vendors: - No specific OEMs are named for pumps, solar, or controls; bidders must provide compliant systems - Estimated Contract Value: - North site: $375,000–$475,000 - South site: $175,000–$275,000 - Eligibility: - Open to all qualified bidders registered with the Iowa Department of Inspections, Appeals & Licensing

Description

This solicitation is a request for bids for the construction of two pumped nutrient reduction wetlands in Calhoun County, Iowa. The project includes selective clearing, excavation, grading, installation of lift stations with solar powered pumps, force mains, tile, inlet risers, water control structures, drawdown pipes, riprap, and seeding. The work is divided into two sites, North and South, combined into one contract, with estimated construction costs ranging from $375,000 to $475,000 for the North site and $175,000 to $275,000 for the South site. The construction completion date is December 31, 2026, with seeding deadlines in May and June 2027.

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