Stanley Road Over Excelsior Ditch Culvert Replacement

Alamosa County is requesting proposals for the replacement of the Stanley Road Bridge over the Excelsior Ditch, including removal of the existing structure, installation of a 12-foot by 6-foot concrete box culvert with buried bottom slab, ancillary earthwork, and miscellaneous construction items, with proposals due September 21, 2026. A pre-bid conference is scheduled for August 27, 2026 at 8:00 a.m. at the Alamosa County Road and Bridge Building, with virtual participation available via Google Meet; site visits are encouraged but will not include individual county showings.

The county will obtain required grading, public way, and floodplain permits as well as approval from the Excelsior Ditch Company. Major work items include structure excavation (340 cubic yards), concrete box culvert (140.7 cubic yards), reinforcing steel (40,426 pounds), and guardrail installation (163 linear feet). All work within the Excelsior Ditch must occur between mid-November and April 1 when irrigation is closed.

The county estimates approximately $40,000 in work items to be performed by county forces, with remaining construction items available for contractor bidding. All work must comply with the 2025 Colorado Department of Transportation Standard Specifications for Road and Bridge Construction.

Award will be made to the qualified bid demonstrating lowest cost, best experience with similar projects, ability to meet the project schedule, and familiarity with Alamosa County operations. The contractor must provide performance and payment bonds equal to the contract price, comprehensive general liability insurance with minimum limits of $1,000,000 per occurrence and $2,000,000 aggregate, comprehensive automobile insurance of $1,000,000 combined single limit, employer's liability insurance of $500,000, and builder's risk insurance for the full contract price.

Written questions are due August 31, 2026 at 4:00 p.m.; responses will be posted as addenda by September 3, 2026. Proposals must be received by 4:00 p.m. on September 21, 2026 via email or delivery to the Road & Bridge Department; bids will be opened and read aloud during the September 23 Alamosa County Commissioners Meeting. The selected respondent has the first right to negotiate an agreement; if satisfactory terms cannot be reached, the county may negotiate with remaining respondents or re-issue the RFP.