Davenport Ionwave #27-17

Davenport Goose Creek Park WQI Step Pools Construction and Stormwater Management Project

The City of Davenport, Iowa is seeking bids for the Goose Creek Park WQI Step Pools project, a major stormwater management and environmental restoration initiative. - Government Buyer: - City of Davenport, Iowa - Purchasing Division and Engineering & Capital Projects offices - Project Scope: - Construction of a large bioretention cell and a series of stormwater step pools to manage and treat roadway runoff before it enters Goose Creek - Major earthwork including 13,162 cubic yards of excavation and 2,200 cubic yards of topsoil - Installation of stormwater infrastructure: - 30 linear feet of 12-inch HDPE storm sewer pipe - 215 linear feet of 8-inch perforated HDPE subdrain - Rain Guardian intake structure (or approved equal) - Precast intake and manhole adjustments - Pavement and site work: - 19 square yards of reinforced concrete pavement - Disc golf tee pad installation - 24.5 square yards of pavement removal - Erosion and sediment control: - 3,000 linear feet of silt fence and ditch checks (with removal and sediment management) - 1,900 square yards of temporary rolled erosion control product - 1,300 linear feet of straw wattles (installation and removal) - 232 tons of riffle mix and 453 tons of cascade mix rip rap - 36 limestone blocks for stream features - Temporary stream crossing for construction access - Planting and restoration: - 1,070 and 1,845 live plant plugs (procurement and installation) - 18 five-gallon shrubs - 39 cubic yards of shredded hardwood mulch - 262 cubic yards of modified soil mix - Seeding and mulching for 1.6 acres (Type 5) and 1 acre (nurse crop) - Project management and compliance: - SWPPP (Stormwater Pollution Prevention Plan) management - Construction survey and layout - Temporary traffic control - Mobilization and warranty for completed work - Notable Requirements: - Compliance with Iowa SUDAS and City of Davenport supplemental specifications - Adherence to Iowa DNR NPDES General Permit No. 2 for stormwater - 1-year warranty period for plant establishment - Bid, performance, and maintenance bonds required for contracts over $100,000 - Disadvantaged Business Enterprise (DBE) participation encouraged - Insurance requirements specified - OEMs and Products: - Rain Guardian (intake structure) is referenced as a preferred or approved equal product - Aggregates must meet ASTM #57 and #8 standards - No other specific OEMs are named; most materials are standard construction commodities - All bids must be submitted electronically through the city's e-bidding system; a pre-bid meeting is encouraged.

Description

The City of Davenport is soliciting bids for the Goose Creek Park WQI Step Pools project, which involves constructing a large bioretention cell and a series of stormwater conveyance step pools. These features will collect and transport stormwater runoff from a roadway down a hill into Goose Creek. The project is coordinated with a larger environmental restoration effort at Goose Creek Park. Bidders must submit their proposals electronically through the City's e-bidding system by September 3, 2026, and a pre-bid meeting is scheduled for August 25, 2026.

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