Ten Mile Road and Deer Flat Road

Ada County Highway District (ACHD) is soliciting bids for the Ten Mile Road and Deer Flat Road roundabout under Project No. 321038 in Ada County, Idaho, with bids due November 18, 2026. The opportunity was posted November 3, 2026.

The work covers roundabout construction with concrete and asphalt paving, curb and gutter, multi-use pathways, Rectangular Rapid Flashing Beacons, school zone flashers, street lighting, stormwater, irrigation, and water line installations. The contractor must follow the 2017 Idaho Standards for Public Works Construction and ACHD supplemental provisions, implement a Stormwater Pollution Prevention Plan under the NPDES Construction General Permit, and maintain ADA-compliant temporary pedestrian routes. Construction staging and traffic control plans require ACHD approval before implementation. A superintendent must be on site from notice to proceed through completion. Fiber optic network disruptions are limited to weekends, and ACHD retains authority over power supply connections. Coordination is required with a separate ACHD contractor completing demolition of a residential structure at 1657 W Deer Flat Road (Parcel 5) by February 28, 2027, and with the Parcel 2 owner on two 6-inch pressure irrigation sleeves that must be installed before temporary road construction begins.

Payment is by unit price on actual quantities, with plan quantities measured as in-place, completed, and accepted units. ACHD runs independent verification of quality control and quality assurance testing for concrete, asphalt, and aggregates. Material that fails specifications is subject to price adjustment or rejection at ACHD's sole discretion. The contractor bears costs for damage beyond construction limits, material disposal, utility damage from blasting, and re-testing after failed quality assurance. Non-separately paid incidentals include dust control during cutting, site cleanup, temporary stormwater flow management, and construction staging plan preparation. A bid bond is required and is attached as Bid_Bond.pdf, serving as a financial guarantee that the awarded bidder will execute the contract at its bid price.