National Dam Inspection Program. Piney Run Dam (NDI-ID Number MD139), Chesapeake Bay Basin, Piney Run, Carroll County, Maryland. Phase I Inspection Report,

reportActive / Technical Report | Accession Number: ADA091258 | Open PDF

Abstract:

Piney Run Dam was constructed as a zoned earthfill structure. The dam embankment consists of an impervious clay core extending from dam foundation to crest, and upstream and downstream embankment shells. Piney Run Dam has a maximum toe to crest height of 73 ft., a crest width of 22 ft., and is 624 ft. long. Upstream and downstream embankments slope 3H1V. Hydraulic discharge facilities include a principal spillway riser, reservoir drain, water supply intake and outlet structure, and an emergency spillway channel. Based on the evaluation of available design information and visual observations of conditions as they existed on the dates of the field reconnaissances, the general condition of Piney Run Dam is considered to be good. Review of available design information indicates the emergency spillway can pass the PMF without overtopping the dam crest. Therefore, spillway discharge capacity is assessed adequate and in accordance with recommended guideline criteria.

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