100,000 SF site in SE corner of plant, underground and above ground demolition, (25 EA) 130-feet deep vertical rock reinforcement system between new shaft and Upper Ohio Interceptor Tunnel (UOIT), (40 EA) 220-feet deep pre-excavation grout holes, 115-feet diameter x 69-feet deep x 4-feet thick slurry wall at upper portion of shaft, rock blasting & excavation, shotcrete w/ rock-dowels below slurry wall, blindside membrane shaft waterproofing, 200-feet deep x 105-feet diameter shaft, 16- feet thick base mat foundation, 5-foot thick outer shaft wall, 56-feet diameter interior 5-feet thick inner shaft wall, approximately 35,000 CY of concrete work, two full-depth stair towers, several permanent hoists & cranes, one full depth elevator, six pumps, process piping, ventilation ductwork, extensive coatings & painting, 20,000 SF footprint 3 story (one below grade, two above) (CIP, PC, Masonry) pump house building over shaft, supported on 54-feet deep micro-piles outside of the shaft footprint, site finishes include paving and some landscape.
