Summary
Constructed in 1976, this earth dam stands at a height of 22.3 feet and has a hydraulic height of 18.1 feet. It impounds Lyons Creek and the Snake River, providing a storage capacity of 55 acre-feet with a normal storage level of 55 acres. With a surface area of 6 acres and a drainage area of 9.2 square miles, Webster plays a crucial role in supporting agricultural activities in the region.
Despite being classified as having a low hazard potential, Webster is subject to state regulation, inspection, and enforcement by the Idaho Department of Water Resources. The dam's condition was assessed as fair during its last inspection in April 2018, with an inspection frequency of every 5 years. The spillway, with a width of 13 feet, is of the uncontrolled type. The risk assessment for Webster indicates a moderate level of risk (3), emphasizing the importance of ongoing monitoring and maintenance to ensure the safety and reliability of this vital water resource infrastructure.
Overall, Webster serves as a key component of the water management system in the area, contributing to the irrigation needs of the local agricultural community. With its modest size and low hazard potential, the dam presents a manageable level of risk that is regularly assessed and monitored. As climate change continues to impact water resources, maintaining the integrity of structures like Webster will be essential in ensuring sustainable water management practices for the future.
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Wind
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Humidity
15-Day Weather Outlook
Year Completed |
1976 |
Dam Length |
220 |
Dam Height |
22.3 |
River Or Stream |
LYONS CREEK SNAKE RIVER |
Surface Area |
6 |
Hydraulic Height |
18.1 |
Drainage Area |
9.2 |
Nid Storage |
55 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
22 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Dry Bed Nr Ririe Id
|
104cfs |
Snake River Nr Heise Id
|
1640cfs |
Willow Creek Nr Ririe Id
|
0cfs |
South Fork Teton River Nr Rexburg Id
|
508cfs |
Snake River At Lorenzo Id
|
911cfs |
Nf Teton River Nr Sugar City Id
|
260cfs |
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 |
|---|---|---|
Aspen Grove Inn
|
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Twin Bridges Co Park
|
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Kelly Island Campground
|
||
Table Rock Campground
|
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Tablerock
|
||
Kelly Island
|
Webster
Heise Bridge Boat Access
Byington Boat Ramp
Wolf Flats Recreation Area
Bonneville County
Lorenzo Boat Access
South Fork Snake River