National Dam Inspection Program. Lofty Reservoir Dam (NDI Number PA-00681, DER Number 54-1), Susquehanna River Basin, Messers Run, Schuykill County, Pennsylvania. Phase I Inspection Report.
BERGER ASSOCIATES INC HARRISBURG PA
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The Lofty Dam is an earthfill structure which was built in 1896-97. It was raised in elevation two times during its existence once in 1912 and once in 1915. The 1915 modifications were not completed until 1922 because of a lack of funds. There were no major changes in the dam since 1922 and the embankment, spillway and outlet pipe of that design are reflected in the dam as it stands today. The embankment length is 1,100 feet and the spillway at the left abutment has a crest length of 29 feet. The spillway is a concrete broad crested weir with concrete side walls. The spillway apron is also concrete. The outlet feature of this dam is an 20-inch diameter pipe with a 20-inch control valve on the downstream end. The valve control is exposed, sitting at the existing ground surface. The upstream end of the 20-inch pipe is submerged and has no positive closure. The dam functioned as a reserve water supply source feeding the Blue Head Dam 2.7 miles downstream through the natural stream channel to which the spillway and outlet of Lofty Dam discharge.
- Civil Engineering