Engineering Design
The Nevada Department of Motor Vehicles in Carson City was in the early design stage of a site rehabilitation project that included a new parking lot and access road, partial redesign of their south parking lot and scale area, pavement sealing of the north parking lot, and associated drainage improvements. Carson City, after performing a comprehensive storm drainage study, engaged RCI, who was already the design engineer on this DMV project, to prepare improvement plans for the replacement of a 72” deteriorating CMP culvert with two new 510-foot long 66” spiral steel culverts and concrete headwall.
Accelerated Schedule
The project had an accelerated design schedule since the surface design for State Public Works was already underway, and it was imperative to get the new culverts installed and operational prior to the site work. RCI priced out several culvert material options that included material, delivery, and construction costs, and worked closely with Carson City to choose the appropriate materials to meet the needs of the city. Included in RCI’s work were the geotechnical investigation, planning, design, and construction administration support to the city.
Cost Estimate on Track
Key challenges associated with the project included high groundwater, shallow cover, minimal slope, and connection into a downstream junction box with capacity constraints. The cost estimate RCI provided was the approximate average of all bids received by the city. While accelerated, RCI was able to maintain the schedule, and plans produced by RCI were constructible with very minimal requests for information by the contractor.
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