Central Street Crossing of Short Creek Design

The County of Mohave, on behalf of the Flood Control District , is inviting the submission of Statements of Qualification (“SOQ”) from firms or individuals qualified to offer professional Civil Engineering services for the design of a drainage crossing in Colorado City, Arizona. All proposals are due before 2:00 pm on Wednesday, May 6, 2026 .

The intent of this effort is to provide 100% design of the upgraded crossing of Short Creek at Central Street to FEMA. A 30% design was submitted as part of the application. The two proposed 48’ Conspan culverts will raise the Central Street crossing by approximately 8 feet while allowing the 100-year flow in Short Creek to pass under the road.

The Mohave County Flood Control District has been awarded a Hazard Mitigation Grant Program (HMGP) grant through the Arizona Department of Emergency and Military Affairs (DEMA) to design an upgraded crossing at the intersection of Short Creek and Central Street. The HMGP Grant is federally funded and must comply with all guidelines, rules, and regulations including a 404 permit. The design project budget is $400,000, from a combination of HMGP and local funds. The Period of Performance set by DEMA ends November 31, 2026.

Short Creek Wash is the primary watercourse through Colorado City. During large storm events, local officials must close the street to protect residents from hazardous conditions, which also impacts response time for police, fire and ambulance services.

On September 14, 2015, massive rains in the Colorado City area impacted a roadway drainage crossing upstream of Central Street, in Hilldale, Utah. At this crossing 12 people lost their lives as they were watching the flood; they were cut off by an adjacent drainage crossing, and a vehicle was swept into the wash. Additional people died in neighboring watersheds from the same storm as it passed over the region. Due to the large number of residents, business owners, and civic organizations (churches and schools) who have access impacted at the Central Street crossing, many lives are put at risk by this very dangerous wash.

Mohave County Flood Control District received Federal funds in 2018 through the FEMA Cooperating Technical Partners Program to perform a hydrologic and hydraulic analysis of this watershed. This study was completed in 2020 and submitted to FEMA as a Letter of Map Revision to update the re-delineated areas within the project boundaries. The Central Street Crossing of Short Creek was identified within both the Areas of Mitigation Interest report completed with the CTP project and within the Mohave County Multi-Jurisdictional Hazard Mitigation Plan.