In 2019, The Church Ditch Water Authority decided to improve a deteriorating culvert crossing under Arapahoe Street in Golden, CO. ERC was tasked with designing a new culvert and overseeing the construction process. Tasks included: initial site survey and hydraulic design, structural design, preparation of bid documents, helping select a construction contractor, and managing construction. The final design piped the ditch under the road and across adjacent property that was difficult to access and maintain. ERC obtained permits from the City of Golden and the Colorado Department of Transportation (CDOT), and worked closely with adjacent property owners. Construction was completed before the 2022 water-delivery season. The final product eliminated stormwater runoff into the ditch, improved hydraulic efficiency and reduced maintenance headaches.