New Underwood Land Partners Dam Reservoir Report
Nearby: Pace Dam New Underwood
Last Updated: December 5, 2025
New Underwood Land Partners Dam in Pennington, South Dakota, is a privately owned earth dam completed in 1986 with a primary purpose not specified.
°F
°F
mph
Wind
%
Humidity
Summary
The dam stands at a height of 14 feet and has a length of 170 feet, providing a storage capacity of 120 acre-feet. Situated on a tributary of Boxelder Creek, the dam is regulated by the South Dakota Department of Agriculture and Natural Resources, with inspection, permitting, and enforcement all being carried out by state authorities.
Despite being assessed as having a low hazard potential and not rated in terms of condition, New Underwood Land Partners Dam has not undergone any recent evaluations or updates in terms of emergency action planning or risk management measures. The dam's primary function and associated structures remain unspecified, and no outlet gates or spillways are mentioned in the available data. While the dam's last inspection dates back to June 1987, its location and purpose are not clearly defined, leaving room for further exploration by water resource and climate enthusiasts interested in understanding the role and impact of dams in the region.
Year Completed |
1986 |
Dam Length |
170 |
Dam Height |
14 |
River Or Stream |
TRIB. BOXELDER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
14 |
Drainage Area |
2 |
Nid Storage |
120 |
Hazard Potential |
Low |
Nid Height |
14 |
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.
New Underwood Land Partners Dam