Harrison County Roadgrade Dam 18-79-43

Significant HazardFair ConditionEmergency Action Plan: Not Required

Location

StateIowa
CountyHarrison
Nearest CityMISSOURI RIVER
River/StreamTR-WILLOW CREEK
Coordinates41.65890, -95.90080

Physical Characteristics

Dam TypeEarth
NID Height66 ft
Dam Height66 ft
Dam Length395 ft
Year Completed1959 (67 years old)

Storage & Hydraulics

NID Storage486 acre-ft
Max Storage486 acre-ft
Normal Storage246 acre-ft
Surface Area14 acres
Drainage Area1 sq mi
Spillway TypeUncontrolled

Ownership & Safety

PurposeOther
OwnerHarrison County Board of Supervisors
Owner TypeLocal Government
Hazard ClassificationSignificant
Condition AssessmentFair
Last Inspection10/11/2023
Emergency Action PlanNot Required

Identifiers

NID IDIA00475
Federal IDIA00475
More InfoState Dam Safety Program

Nearby Dams

Schwertley Dam 1.1 mi Low Olsen Dam 1.6 mi Low South Magnolia Watershed Site 1 1.8 mi Low South Magnolia Watershed Site 4 2.1 mi Low South Magnolia Watershed Site 5 2.2 mi Low South Magnolia Watershed Site 3 2.2 mi Low South Magnolia Watershed Site Z 2.3 mi Low Buss Dam 3.0 mi Low Grap Dam 3.3 mi Low Cunard Dam 3.6 mi Low