Middle Br.
Wind
Humidity
Park River #8, also known as Johnston Dam or Skyrud Dam, is a flood risk reduction structure located in Grafton, North Dakota. Built in 1970 by the USDA NRCS, this earth dam stands at a height of 69.5 feet and has a structural height of 79 feet, with a length of 2400 feet. It serves the primary purpose of flood risk reduction for the Middle Branch Park River, with a storage capacity of 3615 acre-feet and a surface area of 20.5 acres.
Managed by the NDSWC and regulated by the state of North Dakota, Middle Br. Park River #8 is classified as having a significant hazard potential and a moderate risk level. Despite not being rated for its condition, this dam has not been modified since its completion and does not have outlet gates or locks. The spillway, with a width of 350 feet, is uncontrolled in case of overflow, ensuring the safety of the surrounding area in case of heavy rainfall or flooding events.
With its location in Walsh County and its critical role in flood risk reduction for the Middle Branch Park River, Middle Br. Park River #8 is a key infrastructure for water resource and climate enthusiasts. Its design and construction by the USDA NRCS highlight the importance of sustainable water management practices in mitigating the impact of extreme weather events on local communities.
Year Completed |
1970 |
Dam Length |
2400 |
Dam Height |
69.5 |
River Or Stream |
MIDDLE BRANCH PARK RIVER |
Primary Dam Type |
Earth |
Surface Area |
20.5 |
Drainage Area |
20.4 |
Nid Storage |
3615 |
Structural Height |
79 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
79 |
Tongue River At Akra
|
53cfs |
Little South Pembina River Nr Walhalla
|
5cfs |
Forest River Nr Fordville
|
32cfs |
Park River At Grafton
|
26cfs |
Pembina River At Walhalla
|
138cfs |
Forest River At Minto
|
44cfs |