Consideration and Approval of Contract:  Job Order Contract with Kinney Construction for the Cheshire Park Dam Renovations in the amount of $142,382.00
 

1. Approve the Job Order Contract for Construction with Kinney Construction in the amount of $142,382.
2. Authorize the City Manager to execute the necessary documents.

The Cheshire Dam was built by Mr. CC Cheshire in 1953 as a low-head, in-line dam on the Rio de Flag within his ranch property. The dam was designed and built by the US Soil Conservation Service on behalf of Mr. Cheshire. Ownership of the dam was transferred to the City at the time of Mr. Cheshire's sale of his property for the new Cheshire Neighborhood and the City-owned Cheshire Park. The dam, and resulting pond, are managed by PROSE; however, dam safety/engineering is more regularly provided by Water Services. The dam and pond saw minor maintenance in 2000 with City funds, and again between 2005 and 2014 through a series of small State grants. Water Services staff have observed indications of a need for additional maintenance on the dam over the last few years, prompting the Stormwater Section to dredge the pond in the Spring of 2026 to expose the upstream face of the dam. An inspection of the dam was completed by JE Fuller Hydrology and Geomorphology, Ethos Engineering (geotechnical and structural engineering), and Atlas (geophysical structural engineering) in the Spring of 2026. The inspection resulted in recommended concrete repair measures and minor remediation measures to extend the useful life of the single span concrete arch dam.

Project Name: Cheshire Park Dam Renovations
Cost: $142,382
Account Number Budgeted: 206-08-331-1257-0-4237
FY Budgeted Amount: $1,177,817
Grant Funded: No 
Funding Source: Stormwater Utility Fund

On January 6, 2021 the City Council approved the master contract authorizing Kinney Construction to provide Job Order Contract services to the City of Flagstaff for horizontal construction.

1. Approve the Job Order Contract to Kinney Construction to repair the Cheshire Dam.
2. Deny the contract, and defer maintenance on the Cheshire Dam to a later date, which is not recommended by staff.

Cheshire Pond Dam is located across the primary flow path of the Rio De Flag adjacent to the Museum of Northern Arizona and Cheshire Park, Township 21N, Range 7E, Section 5 Gila-Salt River Meridian.  The small dam is referred to as “Narrows Dam” as shown on FEMA FIRM Panel 04005C6806G (Effective 9/3/2010). The dam is not considered "jurisdictional" and is exempt from Arizona Department of Water Resources inspections. The dam was built by CC Cheshire, president of Flagstaff Cheshire Motors, in 1953 for livestock and recreational use. The dam was designed and constructed by the US Soil Conservation Service for CC Cheshire. The property, including the dam, was transferred to the City of Flagstaff in 1969 by Jim Jamison and Don Buttrum at the cost of $1. The City has maintained the park site, including the dam, since that time.

The Stormwater Section contracted the dredge of the pond in early 2026 to expose the majority of the dam's face. After dredging, the dam was inspected by JE Fuller Hydrology and Geomorphology and their structural engineering sub-contractors. The purpose of this current contract is to conduct the recommended dam repairs to extend the useful life of the structure for recreational, ecological, and flood control use.

The Stormwater & Purchasing solicited bids from all the horizontal Job Order Contractors. KCS bid the lowest responsive and responsible submission. 

High Performing Governance: Serve the public by providing high quality customer service.
Safe and Healthy Community: Provide public safety services with resources, staff, and training responsive to the community's needs.
Sustainable and Innovative Infrastructure: Deliver outstanding services to residents through a healthy well-maintained infrastructure system.
Environmental Stewardship: Strengthen Flagstaffs resilience to climate change impacts on the built, natural, economic, health and social systems.
 

Goal E&C.3.
Policy E&C 3.1. Increase the region's preparedness for extreme climate events. Goal WR.5.
Policy WR.5.1. Preserve and restore existing natural watercourse corridors, including the 100-year floodplain, escarpments, wildlife corridors, natural vegetation, and other natural features using methods that result in a clear legal obligation to preserve corridors in perpetuity, where feasible.
Policy WR.5.4. Develop any necessary stormwater infrastructure improvements consistent with City of Flagstaff stormwater master plans or studies as adopted by the City.
Policy WR.5.5. Give preference to regional detention facilities that are designed in conjunction with smaller low-impact development features, rather than numerous smaller dispersed basins. Encourage regional detention basins to incorporate natural watershed characteristics as well as offering recreational components.
Goal PF.1.
Policy PF.1.2. Allocate available public resources necessary for the City and County to prepare and adapt for natural and human-caused hazards so that all government operations support community resiliency.
Policy PF.1.4. Build, sustain, and leverage partnerships with local and regional stakeholders for collective investment, efficient action, and shared responsibility in the building of local resiliency.
 

CR-2: Strengthen existing community systems to create resilience to both short-term shocks and long-term change.
 

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