National Dam Inspection Program. Labelle Slurry Pond 3 (NDI Number PA 00295, Penn DER Number 26-105), Ohio River Basin, Tributary to Monongahela River, Fayette County, Pennsylvania. Phase I Inspection Report
Abstract
Based on a review of available information, visual observations of conditions as they existed on the date of the field inspections, and supporting engineering calculations, the general condition of LaBelle Slurry Pond 3 is considered to be fair. This assessment is based primarily on visual observations of embankment and spillway conditions and hydrology/hydraulic analyses of reservoir/spillway capacity. The structure is classified as a 'large' size, 'significant' hazard dam. Corps of Engineers guidelines recommend the Probable Maximum Flood (PMF) as the Spillway Design Flood for a 'large' size, 'significant' hazard dam. LaBelle Slurry Pond 3's Spillway Design Flood is the Probable Maximum Flood. Spillway capacity is 'inadequate' because the non- overtopping flood discharge was found, by using the HEC-1 computer program, to be 79 percent of the PMF. The Phase I investigation of LaBelle Slurry Pond 3 revealed deficiencies and conditions which should be corrected or improved through implementation of the following recommended improvement efforts. Recommendations are: (1) Embankment Improvements; (2) Principal Spillway: The owner should immediately clean the principal Spillway trash cage of debris and improve the inflow channel to permit unrestricted flow from the reservoir to the pipe; (3) Emergency Spillway: The emergency spillway should either be improved or eliminated; (4) Emergency Operation and Warning Plan; (5) Monitoring of Seepage Zones; and (6) Maintenance and Inspection Procedures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1981
- Accession Number
- ADA109161
Entities
People
- James Ellsworth Barrick Ii
- James P. Hannan
- Samuel G. Mazzella