Iowa City Community School District Bidopportunities #26-03 Ham892326B

Iowa Seeks Bids for Nutrient Reduction Wetland Construction in Hamilton County

The Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and Water Quality, is seeking bids for the construction of a nutrient reduction wetland in Hamilton County, Iowa. - Government Buyer: - Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and Water Quality - Project Scope: - Construction of a Tile Zone nutrient reduction wetland - Major work includes selective clearing, excavation (approx. 19,671 cubic yards), grading, and earthfill (approx. 1,464 cubic yards) - Installation of reinforced concrete pipe (RCP) in 12", 15", and 18" diameters (totaling over 2,600 linear feet) - Installation of high density polyethylene (HDPE) dual wall pipe (15" diameter, approx. 1,579 linear feet) - Installation of tied concrete block mat (Flexamat Plus or engineer-approved equal, approx. 2,350 square feet) - Construction of concrete manholes, modified inlet and outlet structures, concrete aprons, and riprap (Class E) - Seeding of structure, channel, and buffer areas (over 21 acres) - Additional services: site stripping, crop damage mitigation, mobilization/demobilization, drain tile investigation and removal, tile connections - Products and Materials: - Flexamat Plus (tied concrete block mat) is specified, but engineer-approved equivalents are allowed - Reinforced concrete pipes, HDPE pipes, concrete structures, and erosion control materials - Notable Requirements: - 10% bid bond and 100% performance bond required - Strict completion deadlines for construction and seeding, with liquidated damages for delays - Compliance with Iowa DOT and NRCS specifications - Estimated contract value: $250,000 to $350,000 - Place of Performance: - Hamilton County, Iowa (Section 26, Township 89 North, Range 23 West) - Project oversight and administration from Des Moines, IA - No other OEMs are explicitly named besides Flexamat Plus; engineer-approved equals are permitted for the tied concrete block mat.

Description

This solicitation is for the construction of a Tile Zone nutrient reduction wetland in Hamilton County, Iowa. The work includes selective clearing, excavation, grading, installation of reinforced concrete pipe (RCP), high density polyethylene (HDPE) dual wall pipe, tied concrete block mat (Flexamat Plus or engineer approved equal), concrete manholes, and seeding. The project has specific completion dates: construction by November 15, 2026; seeding by May 15, 2027 (structure) and June 30, 2027 (buffer). The estimated contract value ranges between $250,000 and $350,000.

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