Lake Ponderosa Dam

High HazardSatisfactory ConditionEmergency Action Plan: Yes

Location

StateIowa
CountyPoweshiek
Nearest CitySPRING VALLEY
River/StreamTR-MOON CREEK
Coordinates41.57900, -92.58220

Physical Characteristics

Dam TypeEarth
NID Height50 ft
Dam Height50 ft
Dam Length1,090 ft
Year Completed1969 (57 years old)

Storage & Hydraulics

NID Storage5,850 acre-ft
Max Storage5,850 acre-ft
Normal Storage2,500 acre-ft
Surface Area290 acres
Drainage Area6 sq mi
Spillway TypeUncontrolled

Ownership & Safety

PurposeOther
OwnerPoweshiek County Board of Supervisors
Owner TypeLocal Government
Hazard ClassificationHigh
Condition AssessmentSatisfactory
Last Inspection05/30/2024
Emergency Action PlanYes

Identifiers

NID IDIA00972
Federal IDIA00972
More InfoState Dam Safety Program

Nearby Dams

Malcom Dam 1.1 mi Low Lake Cimarron 1.1 mi High Diamond Lake Dam (poweshiek Co) 1.3 mi Significant Diamond Lake Watershed Site A-2 1.8 mi Low Diamond Lake Campground Dam 2.0 mi Low Diamond Lake Watershed Site B-9 2.6 mi Low Diamond Lake Watershed Site B-8 2.6 mi Significant Diamond Lake Watershed Site C-14 2.7 mi Significant Van Roekel Dam 2.9 mi Low Hughes Dam 4.4 mi Low