Newland No. 4 Reservoir Report
Nearby: Lone Tree Bull Creek
Last Updated: December 5, 2025
Newland No.
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Summary
4, located in Crook, Wyoming, is a privately owned earth dam completed in 1955 with a primary purpose of fire protection, stock, or small fish pond. This dam on Cow Creek has a height of 21 feet and a storage capacity of 133 acre-feet, with a normal storage level of 53 acre-feet. Despite its low hazard potential, the dam is currently in poor condition and was last inspected in August 2021, with an inspection frequency of 5 years.
The dam features an uncontrolled spillway with a width of 60 feet, and its risk assessment indicates a moderate risk level. The structure is regulated by the Wyoming State Engineer's Office, with permitting, inspection, and enforcement all carried out by state authorities. The surrounding area has a surface area of 12 acres and no drainage area, making it crucial for local fire protection and stock water supply. With its proximity to Belle Fourche, SD, and its critical functions, Newland No. 4 serves as an important water resource for the region, despite its current maintenance challenges.
Year Completed |
1955 |
Dam Length |
589 |
Dam Height |
21 |
River Or Stream |
COW CREEK |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
16 |
Nid Storage |
133 |
Structural Height |
22 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Newland No. 4