National Dam Safety Program. Rohlfing Dam MO No name 408 Lake Dam (MO 30580), Missouri - Osage - Gasconade Basin, Osage County, Missouri. Phase I Inspection Report.
Abstract
The dam is an earth structure, oriented roughly east-west across a small drainageway. The right spillway is a vegetated earth channel cut into the west abutment. On the left side there is a small training dike which serves to divert high reservoir levels around the left end of the dam and away from the dam-abutment trough. This training dike was purposely breached in 1967 or 1968 when the right spillway was operating. Our inspection and evaluation indicates that in consideration of the small volume of water impounded, 50% of the Probable Maximum Flood is the appropriate design flood. The spillways of this dam meet this criteria. The spillways will pass the 100-year event as well as 50% of the Probable Maximum Flood (PMF) without overtopping the dam. Deficiencies visually observed by the inspection team were willow trees growing on the upstream slope, dead willows rooted below the water level on the upstream slope, trees (up to 8 in. diameter) and brush covering the downstream slope, rodent holes (up to 6 in. diameter) in the downstream slope, and seepage at the toe of the dam along each abutment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1978
- Accession Number
- ADA105304
Entities
People
- Harold P. Hoskins