R&M designed a bottomless arch culvert with aluminum headwalls and wingwalls to replace the aging, scour-critical Little Goldstream Creek Bridge. The crossing is located on a fish stream near Nenana. The bottomless arch concept was selected based on an alternatives analysis that developed 35% designs and cost estimates for three alternatives. The unusual bottomless arch structure best addressed difficult construction conditions and poor foundation soils at the site, which consisted of frozen silts. R&M performed a site visit, developed a flood frequency analysis, and assembled a hydraulic model to aid in the design of the culvert and associated erosion protection.
Services for this Project