Iowa City Community School District Bidopportunities #26-09 Har892022C

Construction of Nutrient Reduction Wetland in Hardin County, Iowa

The Iowa Department of Agriculture and Land Stewardship is seeking bids for the construction of a nutrient reduction wetland in Hardin County, Iowa. - Government Buyer: - Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and Water Quality - Natural Resources Conservation Service (NRCS) is referenced for technical standards - Products & Materials Requested: - Reinforced Concrete Pipe (RCP): 36" diameter, 79 LF for wetland outlet - Precast Concrete Water Control Structure: 4' x 4', 1 unit - Corrugated Polyethylene Pipe (HDPE): - 4" single wall: 1,195 LF - 6" single wall: 1,455 LF - 8" single wall: 413 LF - 8" dual wall: 916 LF - 10" dual wall: 51 LF - 12" dual wall: 409 LF - Corrugated Metal Pipe (CMP) Tile Outlets: - 8" (3 units), 10" (2 units), 12" (1 unit), 15" (1 unit), each 20 LF - Riprap: 245 tons for erosion control - Stop Log Storage Structure: 1 unit - 2" Clean Stone: 30 tons for site access - Geotextile Fabric and steel for water control structure - Services Requested: - Site stripping and preparation (clearing, grubbing, vegetation removal) - Drain tile investigation and removal (2,800 LF) - General excavation (904 CY) - Earthfill (general: 3,680 CY; dam: 1,358 CY; dam core: 2,572 CY; wetland bottom scarify/recompact: 3,008 CY) - Topsoil placement (5,591 CY) - Seeding (buffer: 5.8 AC; structure/channel: 1.5 AC) with specific seed mixes and periods - Mobilization and demobilization - Crop damage compensation - Unique/Notable Requirements: - Compliance with NRCS and Iowa DNR dam safety standards - Specific seeding windows and seed mixes (native grasses, Smooth Brome, forbs) - Liquidated damages for late completion - Tax-exempt status for materials - Contractors must be registered with Iowa Department of Inspections, Appeals & Licensing - Electronic grading files available from project engineer - All materials must meet Iowa DOT and NRCS specifications - OEMs: - No specific OEMs are named; standard construction materials and methods are referenced - Estimated Contract Value: - $200,000 to $300,000 - Period of Performance: - All construction except seeding by June 15, 2027 - Buffer seeding by June 30, 2027; structure seeding by September 15, 2027 - Seeding must occur within specified periods; liquidated damages apply for delays

Description

This solicitation is for the construction of a Tile Zone nutrient reduction wetland in Hardin County, Iowa. The work includes selective clearing, drain tile investigation and removal, excavation, grading, installation of reinforced concrete pipe (RCP), high density polyethylene (HDPE) dual wall pipe installation with corrugated metal pipe (CMP) tile outlets, concrete water control structure, and seeding. The estimated construction cost range is between $200,000 and $300,000. Completion dates are set for June 15, 2027 for construction, June 30, 2027 for buffer seeding, and September 15, 2027 for structural seeding.

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