Greenland L&C Stockwater Reservoir Report

Last Updated: December 5, 2025

Greenland L&C Stockwater, located in Larkspur, Colorado, is a privately owned structure built in 1950 for multiple purposes including fire protection, stock watering, and small fish pond.


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Summary

With a dam height of 18 feet and a length of 876 feet, this earth dam has a storage capacity of 100 acre-feet and serves a drainage area of 1 square mile. The dam has a low hazard potential and is currently in fair condition, last inspected in May 2012.

The primary source agency for regulation and inspection of Greenland L&C Stockwater is the Colorado Division of Water Resources (DWR), ensuring compliance with state permitting, inspection, and enforcement requirements. The spillway of the dam is uncontrolled with a width of 48 feet, capable of handling a maximum discharge of 1650 cubic feet per second. Despite its moderate risk assessment score of 3, the structure has not been modified in recent years and does not have an emergency action plan in place, raising some concerns about preparedness in case of a potential failure.

Overall, Greenland L&C Stockwater plays a crucial role in water resource management in the region, providing vital services for fire protection, livestock, and recreational activities. Climate enthusiasts and water resource professionals should keep a close eye on this structure to ensure proper maintenance and emergency preparedness measures are in place to safeguard against any potential risks to the surrounding community and environment.

Year Completed

1950

Dam Length

876

Dam Height

18

River Or Stream

CARPENTER CREEK-TR

Primary Dam Type

Earth

Surface Area

10

Hydraulic Height

18

Drainage Area

1

Nid Storage

100

Structural Height

18

Hazard Potential

Low

Nid Height

18
       
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.