Title:
Repairing the Newport Hydroelectric Station
Author(s):
E. R. Colle
Publication:
Concrete International
Volume:
15
Issue:
3
Appears on pages(s):
42-46
Keywords:
buttress dams; cracking (fracturing); epoxy resins; preplaced aggregate concrete; silica fume concrete; spillways; General
DOI:
Date:
3/1/1993
Abstract:
The Newport Hydroelectric Station on the Shenandoah River in the Blue Ridge Mountains south of Front Royal, Virginia, is a slab-and-buttress dam dating from 1944. A severe flood in 1942 destroyed most of the ogee sections of the original structure, built in 1928. The dam was rebuilt by combining a slab-and- buttress construction with the buttress-supported-ogee section. Repairs in 1990 included partial and full repairs to the crest slabs using silica fume concrete, repairs to spalled and deteriorated spillway concrete, crack repairs with epoxy resin injection, full-depth replacement of the downstream face and sections of the 25 buttresses, a new concrete diversion wall at the spillway- gravity section, and gabion basket protection of the east abutment. Using the preplaced-aggregate concrete method for repairs to the downstream face of the buttresses underwater and in the dry was proposed.