Tigers Reservoir Report

Last Updated: December 5, 2025

Tigers is a local government-owned dam located in Thornton, Colorado, along the South Platte River.


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Summary

Built in 2004 by the Applegate Group, Tigers serves as a crucial water supply structure in the region. The earth dam stands at 8 feet in height, with a hydraulic height of 5 feet and a structural height of 10 feet. It has a length of 6800 feet and a storage capacity of 2974 acre-feet, providing essential water resources for the surrounding area.

Despite its low hazard potential and satisfactory condition assessment, Tigers is subject to state regulation and inspection by the Colorado Department of Water Resources. The dam features an uncontrolled spillway with a width of 1900 feet, ensuring the safe discharge of excess water during periods of high flow. In the event of an emergency, the dam's risk assessment is categorized as moderate, indicating a need for proactive risk management measures to mitigate potential threats to the structure and surrounding communities. Overall, Tigers plays a vital role in water resource management and climate resilience efforts in the region.

Year Completed

2004

Dam Length

6800

Dam Height

8

River Or Stream

SOUTH PLATTE RIVER-OS

Primary Dam Type

Earth

Surface Area

106

Hydraulic Height

5

Nid Storage

2974

Structural Height

10

Hazard Potential

Low

Foundations

Soil

Nid Height

10
       
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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.