CATAWBA DAM EMBANKMENT SEISMIC STABILITY IMPROVEMENT PROJECT – PHASE I & II
Location: Nebo, North Carolina
Completion Date: February 2011
Phillips & Jordan Role: Prime Contractor
Based upon a nationwide effort initiated by the Federal Energy Regulatory Commission (FERC) to improve the performance of existing dams during large earthquake events, the owner of the Catawba Dam was required to implement embankment seismic stability improvements (ESSI) to comply with FERC requirements. Phillips & Jordan was awarded the contract for construction of the Catawba Dam ESSI Phase I and Phase II Projects. The Phase I Project involved site preparation for the actual modification of the dam and spillway structure.
The Phase II Project was 150 acres in size and involved construction of a new earthen embankment downstream from the original dam. Work scope elements for the Phase II Project included site clearing and excavation, construction of haul roads and retention ponds, foundation dewatering, construction of an earthen embankment, installation of fine and coarse blanket filter drain material, installation of an inclined chimney filter drain and seepage collection channel, construction of Roller Compacted Concrete buttress and wing walls, spillway demolition and resurfacing, demolition of the right bulkhead and wing wall, and conversion of the right bulkhead to a new ogee crest spillway.
WATER RESOURCES SECTOR
Reservoirs • Dams • Levees • Waterways
Over the past 60 years, Phillips & Jordan has completed various water resource projects involving the construction for reservoirs, dams, impoundments, canals, and conveyance structures designed for water storage, flood control, transportation, power generation, and recreation.