Bolen Reservoir Report

Nearby: Anderson #6

Last Updated: December 5, 2025

Bolen, Anderson, Jacobs (B-A-J) is a local government-owned dam located in Grand Junction, Colorado, on Kannah Creek.


°F

°F

mph

Wind

%

Humidity

Summary

Constructed in 1969, this earth-type dam stands at a height of 19 feet and has a length of 1500 feet, providing a storage capacity of 568 acre-feet. The primary purpose of the dam is water supply, with a normal storage capacity of 236 acre-feet and a surface area of 55 acres.

Managed by the Colorado Department of Water Resources, B-A-J is regulated, inspected, and enforced by state authorities. Despite being classified as low hazard potential with fair condition assessment, the dam poses a high risk due to its location and the surrounding area's vulnerability. The emergency action plan (EAP) for the dam was last revised in January 2015, with inspection frequency set at every 6 years.

Overall, Bolen, Anderson, Jacobs serves as a vital water resource infrastructure in Mesa County, Colorado, ensuring water supply for the local community. While it has a relatively low hazard potential, the dam's high-risk assessment underscores the importance of continued monitoring and maintenance to ensure the safety and reliability of this essential water source in the region.

Year Completed

1969

Dam Length

1500

Dam Height

19

River Or Stream

KANNAH CREEK-TR

Primary Dam Type

Earth

Surface Area

55

Hydraulic Height

19

Nid Storage

568

Structural Height

19

Outlet Gates

Slide (sluice gate), Uncontrolled

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

19
       
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.