- CADD Survey Editing
- Hydrologic & Hydraulic Analysis
- Final Design
Rice Lake, located in Emmons County, ND, rose several feet
and threatened the US Highway 83 embankment and overall
safety of area motorists. The North Dakota Department of
Transportation retained the services of Apex Engineering Group to
perform the closed basin hydrologic and hydraulic analysis in
conjunction with the US Highway 83 widening and safety improvement
The Rice Lake outlet was located and surveyed to determine the
ultimate height for a future grade raise on US Highway 83.
Hydrologic calculations were performed on Rice Lake based on the
past three years of precipitation from the contributing and
noncontributing watersheds. If wet cycles continue, calculations
indicated that Rice Lake will overflow relatively soon.
A major tributary to Rice Lake passes under US Highway
83, which required a grade raise and the installation of
a new box culvert. Apex completed the hydraulic analysis and
report for the new crossing, providing a basis of design by
identifying three alternatives and associated cost opinions for the
The NDDOT completed the the final grade raise design as
identified in the hydrologic and hydraulic analysis.