Martin

Martin is an earth dam located in Johnson County, Wyoming, built in 1910. It carries a Significant hazard potential classification and has a fair condition assessment.

About Martin

The primary purpose of Martin is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Big Horn Reservoir Company (private). It impounds the Cross Creek near Big Horn.

The dam stands 43 feet tall and stretches 1,200 feet across, creates a reservoir covering 50 acres, has a maximum storage capacity of 634 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1910, the structure is over a century old.

This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 08/08/2023.

At 43 feet, this dam is taller than 89% of dams nationwide.

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Significant HazardFair ConditionEmergency Action Plan: Not Required

Location

StateWyoming
CountyJohnson
Nearest CityBig Horn
River/StreamCross Creek
Coordinates44.54972, -107.20083

Physical Characteristics

Dam TypeEarth
NID Height43 ft
Dam Height43 ft
Dam Length1,200 ft
Year Completed1910 (116 years old)

Storage & Hydraulics

NID Storage634 acre-ft
Max Storage634 acre-ft
Normal Storage561 acre-ft
Surface Area50 acres
Drainage Area0 sq mi
Max Discharge7,837 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeIrrigation
OwnerBIG HORN RESERVOIR COMPANY
Owner TypePrivate
Hazard ClassificationSignificant
Condition AssessmentFair
Last Inspection08/08/2023
Emergency Action PlanNot Required

Identifiers

NID IDWY00651
Federal IDWY00651
More InfoState Dam Safety Program

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