Tunnel Dam Reservoir Report
Nearby: Carnahan Lake Dam Turner Lake Dam
Last Updated: December 19, 2025
Tunnel Dam, also known as Niangua Lake, is a gravity dam located on the Niangua River in Camden, Missouri.
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Summary
Built in 1930 for hydroelectric purposes, this concrete and earth dam stands at a height of 24 feet and has a length of 878 feet. With a storage capacity of 2650 acre-feet, it serves as a crucial water resource for the region, covering a surface area of 360 acres and draining a watershed area of 627 square miles.
Managed by the Federal Energy Regulatory Commission, Tunnel Dam is classified as having a low hazard potential and a moderate risk assessment. Despite its age, the dam remains in good condition according to the latest inspection in May 2019. While not state regulated, the dam plays a key role in providing hydroelectric power and maintaining water levels in the area. With its uncontrolled spillway and maximum discharge capacity of 62,000 cubic feet per second, Tunnel Dam exemplifies engineering excellence in harnessing water resources for sustainable energy production.
For water resource and climate enthusiasts, Tunnel Dam offers a fascinating glimpse into the intersection of technology, environment, and energy production. Its multi-arch design and soil foundation showcase innovative engineering practices from the early 20th century, while its continued operation highlights the importance of sustainable water management in the face of changing climate patterns. As a vital component of the region's water infrastructure, Tunnel Dam stands as a testament to the enduring legacy of hydroelectric power in shaping our relationship with the natural world.
Year Completed |
1930 |
Dam Length |
878 |
Dam Height |
24 |
River Or Stream |
Niangua River |
Primary Dam Type |
Gravity |
Surface Area |
360 |
Drainage Area |
627 |
Nid Storage |
2650 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
24 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Ho-Humm Canoe Rental & Campground
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Niangua River Oaisis Family Campground
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Niangua River Oaisis Campground
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Tunnel Dam