Division 1 of this Project consists of, but is not limited to, the following: raw water pump station including passive intake screen, intake line, wetwell, two (2) vertical turbine pumps and space for a third pump, bridge crane, and potassium permanganate feed system; cast-in-place concrete 2.5 MGD pretreatment facilities including two-stage rapid mix, two-stage flocculation, high rate sedimentation using plate settlers, and hoseless sludge collectors; 2.5 MGD (expandable to 5.0 MGD membrane filtration facility including membrane filtration treatment modules, CIP system, neutralization system, onsite hypochlorite generation system, chemical feed systems, control room, lab, restrooms, locker room, offices, break room, finished water pumping facilities (two (2) vertical turbine pumps and space for a third pump); finished water storage consisting of a 75-foot-diameter by 30-foot tall 1.0-MG pre-stressed concrete storage tank; plant control system (PCS) consisting of field mounted instruments and control devices, non-proprietary distributed control system utilizing personal computers (PCs) and programmable logic controllers (PLCs); all related site work, piping, electrical, and any other activities incidental to the completion of this Project. Division 2 of this Project consists of, but is not limited to, approximately 8,975 linear feet of 20-inch ductile iron raw water transmission main from the new Lake Hartwell Raw Water Intake on Durham Road to the existing 20-inch main on South Carolina State Highway 59 near the intersection with Fair Play Boulevard in Fair Play, South Carolina, including all related equipment and appurtenances, connections to existing waterlines and facilities, erosion control, grassing, and any other activities incidental to the completion of this Project. No additional specifications were given.

Stiver Engineering was retained by the contractor to provide structural engineering services for the design of the caisson (raw water pump station).  The caisson is 16 ft. diameter by 50 ft. deep.  The contractor successfully sunk the caisson in wet sand.  Stiver Engineering designed the reinforced concrete caisson to be sunk and sealed underwater.  This is a technique that we spent many years learning from working with contractors while sinking caissons in the saturated sandy soils of South Texas.

The DigIndy Project is a nearly 28-mile long network of 18 foot diameter deep rock tunnels being built 250-feet beneath the city.  Beginning near the Indiana State Fairgrounds on the north, and ending on the south side of Indianapolis, DigIndy will be the largest public works project in the city’s history.

The tunnel system will extend along Fall Creek, White River, Pogues Run, Pleasant Run and Bean Creek to create a collective, underground storage and transport facility for wastewater.  All sewage stored and transported in the tunnel system is sewage that otherwise could have gone directly into local waterways. The tunnel system is a component of the federally-mandated plan to reduce raw sewage overflows into the waterways.

The Indianapolis Deep Rock Tunnel Connector Pump Station Project included a screening and grit removal system consisting of 180 feet of 6 foot diameter connector tunnel, a subterranean pump room that is 60 feet wide by 98 feet long by 66 feet tall, a 44 foot diameter main access shaft with an enclosed elevator, enclosed stairway and various utility systems.  The subterranean pump room is located 250 feet below ground surface.  The project also includes a 23 foot diameter equipment shaft with embedded electrical conduits, an at grade pump station building, an at grade main access shaft building, an at grade discharge chamber and miscellaneous site work.

Stiver Engineering was retained for construction consulting by the contractor to design thrust blocks and pipe supports for the intake piping, miscellaneous piping running up the 250 foot access shaft walls and piping for the discharge chamber.  Stiver Engineering designed the permanent dewatering system for the large subterranean pump room 250 feet below the surface.  We also assisted in the design of a mobile concrete forming system for the construction of the 6 foot diameter connector tunnel.