Rolling Hills Dam #2 Reservoir Report
Nearby: Rolling Hills Dam #1 Stoeffer Dam
Last Updated: December 12, 2025
Rolling Hills Dam #2, located in Maxwell, Story County, Iowa, was completed in 1973 and serves multiple purposes including fire protection, stock, and a small fish pond.
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Summary
Owned privately, this earth dam stands at a height of 40 feet and has a length of 1055 feet, with a storage capacity of 134 acre-feet. The dam is regulated by the Iowa Department of Natural Resources and is periodically inspected to ensure its safety.
Situated on the TR-Rock Creek, Rolling Hills Dam #2 covers a surface area of 9.2 acres and has a drainage area of 0.27 square miles. Despite its low hazard potential, the dam is classified as having a moderate risk level (3). The dam features an uncontrolled spillway and is designed to withstand various environmental conditions. While it is primarily used for fire protection and livestock purposes, the dam also offers recreational opportunities for the local community.
Supported by the USDA NRCS, Rolling Hills Dam #2 serves as a vital water resource for the surrounding area. With its strategic location and efficient design, the dam plays a crucial role in water management and conservation efforts in the region. Enthusiasts of water resources and climate will appreciate the unique features and significance of Rolling Hills Dam #2 in maintaining a balance between human needs and environmental sustainability.
Year Completed |
1973 |
Dam Length |
1055 |
Dam Height |
40 |
River Or Stream |
TR-ROCK CREEK |
Primary Dam Type |
Earth |
Surface Area |
9.2 |
Drainage Area |
0.27 |
Nid Storage |
134 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
40 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Indian Creek Near Mingo
|
79cfs |
South Skunk River Below Squaw Creek Near Ames
|
130cfs |
Squaw Creek At Ames
|
53cfs |
South Skunk River Near Ames
|
92cfs |
Fourmile Creek Near Ankeny
|
9cfs |
South Skunk River At Colfax
|
211cfs |
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.
Rolling Hills Dam #2