Jay Dee Contractors, Inc.

This job is one of a series of projects designed to increase the capacity of the City of Columbus sewer system. This project consists of approximately 20,000 lft of 14' I.D. tunnel. Tunnel excavation through boulder laden sand and gravel is being performed by a 193" Lovat Earth Pressure Balanced Tunnel Boring Machine. The tunnel is being lined with precast concrete segments. Other aspects of the project include a large excavation box sever, a river crossing and several access shafts and manholes.

This west coast project, part of the Brightwater Conveyance System adjacent to Puget Sound, c

alls for construction of over 21,000 lft of 13' I.D. tunnel in glacial till. The tunnel is to be lined with pre-cast concrete segments with 2,500 lft to be lined with 10' diameter steel pipe. tunnel that is lined. A portal structure and sampling facility will also be constructed.

This project calls for the rock excavation of approximately 3,600 lft of 12' 6" diameter cast in place concrete storm water conduit. Diversion, Drop, Outfall and Transition structures will also be constructed on this project.

This project included the excavation of tw

o different sized diameter tunnels. Excavation of unlined tunnels included 7,900 LFT of 22' diameter and 2,700 LFT of 8' diameter excavations through dolomite limestone. The project also included two large underground structures and a diversion structure.

Calumet Tunnel System - Little Calumet Leg

South Holland, Illinois

Metropolitan Water Reclamation District of Greater Chicago

This project included approximately 19,000

linear feet of various sizes of connecting sewer and entrance conduit structures varying in size from 24 to 120 inches. This project included several drop and access shafts with diameters from 4 feet
to 15 feet and from 160 to 200 feet in elevation. Various other regulating structures were also constructed.

Rehabilitation of Complexes A & B Sludge Thickeners and Associated Facilities

Detroit, Michigan

Detroit Water and Sewerage Department

This rehabilitation project at the Detroit Wastewate

r Treatment Plant called for the overhaul of Sludge Thickening Complexes, Sludge Storage Tank associated control buildings and pipe galleries. This project required the skills of Process Mechanical, Electrical, HVAC, Instrumentation, Demolition and concrete trades. This project required careful coordination with Plant Operations as work was completed in an active Plant Setting.

Cady Marsh Drainage Ditch

Griffith, Indiana

Department of Army

Constructed to eliminate perennial area flooding, this project consists of approximately one mile of 10' concrete lined tunnel through silty clay. Several structures were built including inlet and outlet structures, and both discharge and overflow weirs.,

Empire WWTP Outfall & Rosemount Interceptor Phases II and III

Rosemount, Minnesota

Metropolitan Council of Environmental Services

Approximately 4,700 lft of 66" diameter and 4,700 lft of 78" diameter pipe was placed in a tunnel using both the jack pipe and rib and lag tunneling methods.

Crosstown 8 Collector System
Milwaukee, Wisconsin

Milwaukee Metropolitan Sewerage District

5,150 lft of 108" sewer was constructed with one-pass concrete segmental lining. Excavation was performed with a 126" Lovat Earth Pressure Balance Tunnel Boring Machine through silty clays and saturated sands. Several junction and drop structures were also built.

10,030 lft of 60" sewer tunnel was installed by the pipe jack method, using a Decker Tunnel Boring Machine. The tunnel was lined with reinforced concrete pipe utilizing the jack pipe tunneling method. The tunnel was excavated through soil conditions of clay, silt, and boulders at an average depth of 27 feet. The longest tunneling run on the project was 1,045 lft.

Two Decker Tunnel Boring Machines were used to construct 16,778 lft of sewer tunnel utilizing both the jack pipe and rib and lag tunneling methods. The mining took place at an average depth of 59 feet through saturated sands and silts, and slickensided clays. The project also included various junction structures. The longest tunneling run on the project was 1,563 lft. Portions of the tunneling took place under the White Oak Bayou.

Located within the Mobil Oil Refinery, this storm water separation tunnel consisted of 2,500 lft of 102" I.D. fiberglass pipe inside a 128" O.D. fabricated steel liner. A 133" diameter Lovat Earth Pressure Balance TBM was utilized to excavate through slickensided clays, saturated sands and silts. Two 60 ft deep caissons were also constructed, one 25 feet in diameter and one 50 feet in diameter. Since this was a "Design / Build" project, Jay Dee also provided the design services.

This project consisted of 10,223 lft of 108" I.D. reinforced concrete pipe in tunnel utilizing the pipe jacking tunneling method. The average tunnel depth was 58 feet with the average distance between shafts of 1,278 lft. Tunneling was completed by means of a 131" diameter Earth Pressure Balance TBM through clays, silt, and silty clays. Other major features included a large drop shaft / deaeration chamber excavated in rock along with a connection to an existing Deep Tunnel owned by the Metropolitan Water Reclamation District of Greater Chicago.

This Combined Sewer Overflow project included 7,950 lft of 120" diameter tunnel in boulder laden sands, glacial till, silts, and clay. A 159" Lovat Tunnel Boring Machine was utilized. The project also included the demolition of the Michigan State University Fisheries Facilities, as well as the construction of a Wier / Baffle structure, pump station, and outfall. A large portion of the project took place on the campus of Michigan State University.

Approximately 7,000 lft of 96" tunnel was constructed and 2,200 lft of opencut on this relief sewer project. A 133" diameter Lovat TBM was used for excavating through clachi shale soil conditions including river crossing near the Downtown section of Fort Worth. Also included was 2,400 lft of 24" sewer installed by microtunneling.

8,197 lft of 42" sewer in tunnel was constructed by means of the jack pipe tunneling method. A 54" Decker Tunnel Boring Machine was employed to excavate the tunnel through boulder laden clays, silts and sands at an average depth of 37 feet.

This Combined Sewer Overflow project for the County of Wayne, Michigan included 25,700 lft of 90" diameter tunnel excavated through soft clay laden with boulders. At an average depth of 50 feet, the pipe-in-tunnel method was employed wherein 90" diameter concrete pipe were placed inside the previously excavated tunnel and grouted in place. The tunnel, excavated by a 125" Lovat TBM, had a primary lining of ribs and lagging. The project also included approximately 1,400 lft of smaller diameter tunnel and several underground junction and control structures. Hydrogen Sulfide was present in the groundwater for the entire duration of the tunneling operation.

This storm water project included 5,300 lft of 120" sewer tunnel with an outlet transition structure and outfall into the St. Joseph River. The tunnel was excavated by a 163" Lovat TBM and was supported with a primary liner of ribs and lagging. The 120" final lining consisted of a monolithically cast-in-place concrete.

This project included the construction of a building to house the secondary treatment facility. Major items included an oxidation ditch, raw sewage pump station, two final settling tanks, and sludge thickening and aerobic digestion components.

Construction of this new waste water treatment plant included three 65 ft. diameter clarifiers, 130 ft. diameter oxidation tank, ultraviolet disinfection facilities, grit removal facilities, and a raw sewage pumping station.

This tunnel pump station project was constructed utilizing the caisson construction method. The 50 ft. diameter caisson houses several high capacity sewage and chopper pumps. Buildings for both the electrical and mechanical equipment were also constructed. Site and civil work included concrete paving, storm and sanitary sewers and temporary sheeting. Miscellaneous off-site tunnel and basin work including instrumentation and control provisions was also completed.