Parvin Reservoir Report

Last Updated: December 5, 2025

Parvin, also known as Haviland, is a state-owned structure located in Larimer County, Colorado, specifically in Fort Collins.


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Summary

This dam, completed in 1925, serves primarily as a Fish and Wildlife Pond, with additional purposes including recreation. Standing at a height of 45 feet, Parvin boasts a significant hydraulic height of 58 feet and a structural height of 68 feet, making it a crucial water resource for the area.

With a storage capacity of 1300 acre-feet and a surface area of 60 acres, Parvin plays a vital role in managing the South Lone Pine river/stream. The dam, classified as an Earth dam type, features an uncontrolled spillway with a width of 35 feet. Despite its age, Parvin has been assessed to be in satisfactory condition, with a moderate risk level assigned to it. Regular inspections and maintenance ensure its structural integrity and the safety of downstream communities, highlighting the importance of effective water resource management in the face of changing climate conditions.

Managed by the Colorado State agency and regulated by the Department of Water Resources (DWR), Parvin represents a key infrastructure for both wildlife conservation and recreational activities in the region. Its historical significance, combined with its functional role in water storage and flood control, underscores the importance of sustainable water resource management practices in mitigating the impacts of climate change and ensuring the resilience of our ecosystems.

Year Completed

1925

Dam Length

427

Dam Height

45

River Or Stream

SOUTH LONE PINE

Primary Dam Type

Earth

Surface Area

60

Hydraulic Height

58

Drainage Area

17

Nid Storage

1300

Structural Height

68

Hazard Potential

Significant

Nid Height

68
       
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.