MM-39. 45-H. 75, Rapid Creek Culvert Replacement

Mesa County is soliciting bids for the Rapid Creek Culvert Replacement Project (IFB-25-RCC-83), which involves replacing an existing 120-inch Corrugated Metal Pipe (CMP) along Rapid Creek Road with a 10' x 8' Reinforced Concrete Box Culvert (RCBC). The project will include road improvements, shoulder enhancements, and horizontal curve radius modifications. Contractors must be pre-qualified with the Colorado Department of Transportation (CDOT) in General Construction, with pre-qualification in a dollar amount equal to or exceeding the bid value. The bid submission deadline is October 15, 2025, at 10:00 AM Mountain Time, with electronic submissions required through RockyMountainBidSystem.com. Work is expected to commence within 10 days of the Notice to Proceed and be completed within 90 working days. Contractors will need to provide comprehensive insurance coverage, including Workers' Compensation, Commercial General Liability, Comprehensive Automotive Liability, and Professional Liability insurance with specified minimum coverage amounts. The project also requires contractors to manage public information services, coordinate utilities, acquire necessary permits, and maintain access for local residents and businesses during construction.

The solicitation does not explicitly specify set-aside designations or restrictions for disadvantaged enterprises. The project is located in Larimer County, Colorado, with a total project budget of $80,000, including a Force Account line item for potential additional work or modifications. Geotechnical investigations have been completed, revealing challenging terrain with steep hillsides composed of basalt cobbles and boulders in a clayey sand matrix. The existing site conditions require careful construction approach, with recommended bearing capacity of 3,500 psf for the box culvert structure and specific guidelines for foundation design, structural fill placement, and compaction. Laboratory testing indicated "Severe" sulfate concentrations that could potentially impact concrete durability, necessitating specialized construction techniques. The project involves comprehensive environmental mitigation, including native seeding, soil conditioning, and erosion control measures. Contractors should be prepared to address potential geotechnical challenges, including slope stability and rockfall mitigation.