Engineering department outlines retention-pond, culvert and impact-fee work tied to Belt Route corridor

Iron County engineering staff reported on Sept. 20 that the county has purchased land for a retention pond intended to relieve local flood risk, is negotiating right-of-way and culvert work on Mid Valley Road, and is advancing a combined capital-improvement plan and impact-fee study to guide future infrastructure investments.

The engineer said the recently purchased retention pond property is oversized by about 35% for the immediate need and that staff are coordinating a 36-inch culvert across Mid Valley Road to route water from the Peak View subdivision and the Webster Ditch toward the retention pond. The county is seeking a 25-foot right-of-way to cross Mid Valley Road and is coordinating property purchases and easements in the industrial corridor (56 and Iron Springs Road) to support the larger Belt Route project.

Engineering staff said SunRock has a contract to dig the retention pond, and the county has engaged Morley McConkie (St. George) for commercial property appraisals to support corridor acquisitions. The department also reported work on vegetation- and borrow-ditch management, including a proposal to use goats for weed control in hard-to-reach ditches to avoid repeated buildup from mowing.

The engineer described a forthcoming capital-improvement plan that will be paired with an impact-fee study; the combined work is intended to identify projects that benefit broad areas (transportation and stormwater) and to guide fee-setting and prioritization. Staff noted some detention/retention crediting assumptions (for lawns and xeriscape) may be overstated and can lead to undersized drainage facilities, an issue the county will consider during planning.