H. Hulm Reservoir Report

Nearby: Jones Merkel

Last Updated: December 12, 2025

H.


°F

°F

mph

Wind

%

Humidity

Summary

Hulm is a privately owned earth dam located in Dewey, South Dakota, with a fascinating history dating back to its completion in 1938. This dam stands at a height of 25 feet and has a storage capacity of 80 acre-feet, with a normal storage level of 40 acre-feet. The dam serves the important purpose of regulating water flow in the TR-MISSONot RatedI river or stream, contributing to flood control efforts in the area.

Managed by the South Dakota Department of Environment and Natural Resources (DENR), H. Hulm is classified as having a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite its age, the dam remains an integral part of the local water resource infrastructure, with state-mandated inspections, permitting, and enforcement ensuring its continued functionality and safety. Furthermore, H. Hulm is situated within the St. Paul District of the US Army Corps of Engineers, underscoring its significance in water resource management in the region.

With its rich history, strategic location, and state-regulated operations, H. Hulm serves as a noteworthy example of the intersection between water resource management and climate resilience. As climate change continues to impact water availability and quality, dams like H. Hulm play a crucial role in safeguarding communities against floods and ensuring sustainable water use. By upholding rigorous regulatory standards and maintenance practices, H. Hulm exemplifies the importance of proactive management in maintaining the integrity of water infrastructure in the face of evolving environmental challenges.

Year Completed

1938

Dam Length

370

Dam Height

25

River Or Stream

TR-MISSONot RatedI

Primary Dam Type

Earth

Hydraulic Height

25

Nid Storage

80

Hazard Potential

Low

Nid Height

25
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.