North Fork

North Fork is an earth dam located in Chaffee County, Colorado, built in 1953. It carries a High hazard potential classification and has a satisfactory condition assessment.

About North Fork

The primary purpose of North Fork is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Upper Arkansas Water Conservancy District (terry S (local government). It impounds the N Fork South Arkansas Ri near Poncha Springs.

The dam stands 35 feet tall and stretches 500 feet across, creates a reservoir covering 33 acres, has a maximum storage capacity of 810 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1953, the structure is well into its service life at over 50 years old.

This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/13/2022.

At 35 feet, this dam is taller than 82% of dams nationwide.

Living Downstream

If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Colorado dam safety program can provide more specific information about emergency planning for this structure.

Search for dams near your address to see all dams in your area with hazard classifications and safety data.

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateColorado
CountyChaffee
Nearest CityPoncha Springs
River/StreamN Fork South Arkansas Ri
Coordinates38.61000, -106.32390

Physical Characteristics

Dam TypeEarth
NID Height35 ft
Dam Height29 ft
Dam Length500 ft
Year Completed1953 (73 years old)

Storage & Hydraulics

NID Storage810 acre-ft
Max Storage810 acre-ft
Normal Storage602 acre-ft
Surface Area33 acres
Drainage Area3 sq mi
Max Discharge3,028 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeRecreation
OwnerUPPER ARKANSAS WATER CONSERVANCY DISTRICT (TERRY S
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection10/13/2022
Emergency Action PlanYes

Identifiers

NID IDCO00457
Federal IDCO00457
More InfoState Dam Safety Program

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