C. P. P. Dam Reservoir Report

Last Updated: December 19, 2025

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Summary

P. P. Dam, located in Palmer, Alaska, is a private dam regulated by the Alaska Department of Natural Resources. Standing at a height of 7.3 meters with a hydraulic height of 6.6 meters, this earth dam serves multiple purposes with a primary use classified as 'Other'. The dam has a low hazard potential and is deemed to be in satisfactory condition as of the last assessment in December 2012.

Constructed with a buttress core type, C. P. P. Dam has a length of 420 meters and a storage capacity of 197 acre-feet. The spillway, which is uncontrolled, has a width of 90 meters. In 2012, the dam underwent hydraulic modifications to enhance its performance. Despite having no outlet gates, the dam has a maximum storage capacity of 197 acre-feet and a normal storage of 178 acre-feet.

With a moderate risk assessment rating of 3, C. P. P. Dam is equipped with emergency action plans and meets regulatory guidelines. Although the last inspection date is unspecified, the dam has a history of satisfactory condition assessments and is monitored for enforcement, permitting, and inspection by the state regulatory agency - AKDNR. As a crucial water resource structure in Matanuska-Susitna County, Alaska, C. P. P. Dam plays a vital role in water management and climate resilience efforts in the region.

Years Modified

2012 - Hydraulic

Dam Length

420

Dam Height

7.3

Primary Dam Type

Earth

Surface Area

27

Hydraulic Height

6.6

Nid Storage

197

Outlet Gates

None

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

7
       
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.
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