Mortimer Canyon Dam

Mortimer Canyon Dam is an earth dam located in Harney County, Oregon, built in 1951. It carries a Low hazard potential classification.

About Mortimer Canyon Dam

The primary purpose of Mortimer Canyon Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Robert Smith (private). It impounds the Mortimer Canyon Creek near No Downstream Settlement.

The dam stands 30 feet tall and stretches 605 feet across, creates a reservoir covering 30 acres, has a maximum storage capacity of 300 acre-feet, and collects water from a drainage area of 7 square miles. Completed in 1951, the structure is well into its service life at over 50 years old.

This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 06/07/2017.

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Low HazardNot Rated ConditionEmergency Action Plan: Not Required

Location

StateOregon
CountyHarney
Nearest CityNo Downstream Settlement
River/StreamMortimer Canyon Creek
Coordinates43.64498, -118.76944

Physical Characteristics

Dam TypeEarth
NID Height30 ft
Dam Height30 ft
Dam Length605 ft
Year Completed1951 (75 years old)

Storage & Hydraulics

NID Storage300 acre-ft
Max Storage300 acre-ft
Normal Storage212 acre-ft
Surface Area30 acres
Drainage Area7 sq mi
Max Discharge900 cfs

Ownership & Safety

PurposeIrrigation
OwnerROBERT SMITH
Owner TypePrivate
Hazard ClassificationLow
Condition AssessmentNot Rated
Last Inspection06/07/2017
Emergency Action PlanNot Required

Identifiers

NID IDOR00173
Federal IDOR00173
More InfoState Dam Safety Program

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