Ralston Subwatershed Site M-2

Ralston Subwatershed Site M-2 is an earth dam located in Cherokee County, Iowa, built in 1969. It carries a Low hazard potential classification.

About Ralston Subwatershed Site M-2

The primary purpose of Ralston Subwatershed Site M-2 is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Cherokee County Swcd (local government). It impounds the Tr-little Sioux River near Washta.

The dam stands 27 feet tall and stretches 885 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 108 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1969, 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.

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Low HazardNot Rated ConditionEmergency Action Plan: Not Required

Location

StateIowa
CountyCherokee
Nearest CityWashta
River/StreamTr-little Sioux River
Coordinates42.56830, -95.76530

Physical Characteristics

Dam TypeEarth
NID Height27 ft
Dam Height27 ft
Dam Length885 ft
Year Completed1969 (57 years old)

Storage & Hydraulics

NID Storage108 acre-ft
Max Storage108 acre-ft
Normal Storage35 acre-ft
Surface Area4 acres
Drainage Area0 sq mi
Spillway TypeUncontrolled

Ownership & Safety

PurposeFire Protection, Stock, Or Small Fish Pond
OwnerCherokee County SWCD
Owner TypeLocal Government
Hazard ClassificationLow
Condition AssessmentNot Rated
Emergency Action PlanNot Required

Identifiers

NID IDIA00181
Federal IDIA00181
More InfoState Dam Safety Program

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