12-8

12-8 is an earth dam located in Brown County, Kansas, built in 2004. It carries a Significant hazard potential classification and has a fair condition assessment.

About 12-8

The primary purpose of 12-8 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Wolf River Wjd No 66 (local government). It impounds the South Fork Of Wolf River.

The dam stands 38 feet tall and stretches 970 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 1,225 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2004, the structure is relatively new.

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. An emergency action plan is in place for this dam. The most recent inspection on record was 07/08/2020.

At 38 feet, this dam is taller than 85% of dams nationwide.

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Significant HazardFair ConditionEmergency Action Plan: Yes

Location

StateKansas
CountyBrown
River/StreamSouth Fork Of Wolf River
Coordinates39.66295, -95.35273

Physical Characteristics

Dam TypeEarth
NID Height38 ft
Dam Height38 ft
Dam Length970 ft
Year Completed2004 (22 years old)

Storage & Hydraulics

NID Storage1,225 acre-ft
Max Storage1,225 acre-ft
Normal Storage290 acre-ft
Surface Area25 acres
Drainage Area1 sq mi
Max Discharge4,473 cfs
Spillway TypeUncontrolled

Ownership & Safety

PurposeFlood Risk Reduction
OwnerWOLF RIVER WJD NO 66
Owner TypeLocal Government
Hazard ClassificationSignificant
Condition AssessmentFair
Last Inspection07/08/2020
Emergency Action PlanYes

Identifiers

NID IDKS07932
Federal IDKS07932
More InfoState Dam Safety Program

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