Long Willow Bottom Reservoir Report

Last Updated: December 5, 2025

Long Willow Bottom is a state-regulated recreational dam located in Garfield, Utah, specifically in the city of Escalante.


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Summary

Built in 1961, this earth dam stands at a height of 17 feet and has a hydraulic height of 15 feet, with a storage capacity of 100 acre-feet. Situated on Twitchell Creek, this dam serves the primary purpose of recreation and offers a serene setting for water resource and climate enthusiasts to enjoy.

Managed by the Utah Division of Water Rights, Long Willow Bottom has a low hazard potential and is inspected every five years to ensure its structural integrity. While the dam's condition assessment is currently listed as "Not Rated," it remains a popular spot for outdoor activities such as fishing, boating, and wildlife viewing. With its picturesque surroundings and tranquil waters, this dam presents a captivating opportunity for individuals interested in water resource management and climate conservation to explore and appreciate the natural beauty of the area.

Overall, Long Willow Bottom serves as a recreational haven in the heart of Utah, offering a peaceful retreat for those passionate about water resources and climate conservation. As part of the state's jurisdiction, this dam provides a safe and enjoyable environment for visitors to connect with nature and appreciate the importance of sustainable water management practices. With its scenic location on Twitchell Creek and its low hazard potential, Long Willow Bottom is a must-visit destination for enthusiasts looking to immerse themselves in the beauty of the natural world while learning about the vital role of water resources in preserving our planet's climate.

Year Completed

1961

Dam Length

113

River Or Stream

TWITCHELL CREEK

Primary Dam Type

Earth

Hydraulic Height

15

Drainage Area

0.5

Nid Storage

100

Structural Height

17

Hazard Potential

Low

Nid Height

17
       
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.