Keeping traffic moving and water flowing in eastern North Dakota
Near Blanchard, North Dakota, substandard pavement conditions on ND 200A were compromising roadway safety. At the same time, a pair of structurally deficient culverts was causing roadway settlement where the north branch of the Elm River crosses the highway. Add ongoing bank erosion—calling for a stream realignment—and what was originally a straightforward minor rehabilitation became more complicated for the North Dakota Department of Transportation.
Our team contributed engineering services for the minor roadway rehabilitation, which included a thin lift overlay and sliver widening. Original problem solved. We then designed the culvert replacement and stream realignment, repurposing an abandoned stream segment to mitigate wetland impacts.
The combination of stream realignment and on-site wetland mitigation triggered several permitting requirements. To meet the scheduled letting date, the team needed to rapidly coordinate with local, state, and federal permitting agencies. We quickly held an interagency field review so that all agencies understood the proposed stream work and the design team understood the permitting requirements. As a result, permits were successfully secured, and the final design was completed on schedule.
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