Welling No 2 Reservoir Report

Last Updated: December 20, 2025

Welling No 2, also known as Welling Big Dam, is a privately owned structure located in Bear Lake, Idaho.


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Summary

This earth dam, constructed in 1962 for irrigation purposes, stands at a height of 28.8 feet with a hydraulic height of 26.3 feet. The dam has a storage capacity of 147 acre-feet and serves the Bear Lake Springs area.

The dam's spillway, which is controlled, and its low hazard potential make it a vital resource for managing water in the region. Despite its satisfactory condition assessment as of August 2013, the dam poses a very high risk due to its location and function. The structure has a drainage area of 0.8 square miles and a storage area of 14 acres, making it a key component in the water management system for the area.

With state regulation, inspection, and enforcement in place, Welling No 2 continues to play a crucial role in supporting irrigation activities in Bear Lake. Its presence ensures the consistent supply of water for agricultural purposes, highlighting the importance of maintaining and monitoring water resources in the face of changing climate conditions.

Year Completed

1962

Dam Length

650

Dam Height

28.8

River Or Stream

SPRINGS BEAR LAKE

Surface Area

14

Hydraulic Height

26.3

Drainage Area

0.8

Nid Storage

147

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

29
       
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.