Welcome to Frontier-Kemper Constructors, Inc.

Interim Plant Upgrade

Contractor: Frontier-Kemper, Durr Mechanical, Perini JV
Owner: New York City Department of Environmental Protection
Location: Borough of Queens, New York
Project Description: Rehabilitation and upgrade of structural and mechanical systems to include open cut excavation, concrete demolition and construction, and process mechanical installation. The project also includes the installation of various sewer and air header pipes, a 60” diversion sewer, eight (8) large capacity sewer pumps, mechanical controls, new process piping within the plant’s underground tunnel system (galleries), construction of numerous operational buildings and the restoration of the plant roadways. In addition, there is extensive work in the plant’s preliminary and final tanks which involves the installation of new weirs and troughs and extensive structural concrete additions and repairs. All work must be performed in cooperation with three other contractors (electrical, HVAC, and plumbing) who are working concurrently on the site. Project completion is currently projected to be 2008.

NYC DEP City Tunnel 3, Stage 2

Contractor: Schiavone/Shea/Frontier-Kemper, A Joint Venture
Owner: New York City Department of Environmental Protection
Location: Manhattan, New York
Project Description: Excavation and Lining of the Manhattan Portion of City Tunnel No. 3, Stage Two: A total of nine shafts (24B – 33B) at 500 VF deep. Excavation of 27,000 LF of tunnel using same TBM at 12.25 ft. diameter that was used to excavate the 18,000 LF of tunnel for Project 01.10. Work also includes concrete lining all 45,000 LF at 10 ft. diameter.
Brightwater Central Tunnel Project

Contractor: Vinci/Parsons/Frontier-Kemper JV
Owner: King County
Location: Seattle, Washington
Project Description: Work includes 11,600 LF of 16.5 ft diameter tunnel from the North Kenmore Shaft to the existing North Creek Shaft and 20,000 LF of 14 ft diameter tunnel running west from the North Kenmore Shaft. The project also includes 4,500 LF x 4 ft diameter microtunnel and cut/cover construction between the North Kenmore Shaft and the existing Swamp Creek Interceptor. Shaft excavation includes a 60 VF x 86 ft. diameter shaft at North Kenmore and a 28 ft diameter x 200 ft deep receiving shaft at Ballinger Way.

Ashlu Creek Hydro Project

Contractor: Frontier-Kemper Constructors, ULC
Owner: Ashlu Creek Investments Limited Partnership (Innergex & Ledcor Partnership)
Location: Squamish, British Columbia
Project Description: A design-build, operate, transfer, run-of-the-river hydroelectric project. It consists of an upriver diversion weir, drop shaft, tunnel and downriver powerhouse. The weir diverts part of the river into the drop shaft and tunnel which then conveys the water 4.3 kilometers downstream to a powerhouse, and is finally discharged back into Ashlu Creek. Frontier-Kemper’s portion of the work includes the design and construction of a 130 meter deep raise bored shaft and boring the 4.3 kilometers of 4.1 meter diameter tunnel.

Delaware Aqueduct Rehabilitation

Contractor: Rondout Constructors, JV
Owner: New York City Department of Enviromental Protection
Location: New York
Project Description: Work includes the rehabilitation of the Delaware Aqueduct for New York City Department of Enviromental Protection. Scope of work includes preparation for what will be a future repair contract for the Rondout – West Branch Tunnel. The Project will also increase the level of readiness if it becomes necessary for NYC to respond to a sudden failure within the tunnel. Work includes installing a new tunnel dewatering system at Shaft No. 6 and performing a 700 ft. deep underwater saturation dive to inspect the bottom of Shaft No.6 which is presently flooded. The purpose of the dive will be to assess the condition of the access door as well as various existing pipes and valves. Additional work includes installation of all new piping, a hoist system, an electrical substation, and reanchoring the existing shaft rail.

Pearl River Storage & Conveyance Tunnel

Contractor: Triad/FKCI JV
Owner: The City of Lafayette – Department of Public Works
Location: Lafayette, Indiana
Project Description: Work includes the construction of a 2000 ft x 10 ft diameter tunnel with two work shafts, several drop structures, miscellaneous sewer connections, and a 42 in. microtunnel. Excavation of the tunnel will be accomplished by the use of a specialized compressed air digger shield (see photo). Liner plate will provide the initial ground support and the final lining will be cast-in-place concrete.

Croton Aqueduct Raise Bore Shafts

Contractor: Frontier-Kemper Constructors, Inc.
Owner: Schiavone/Picone JV
Location: New York
Project Description: Work includes raise drilling one shaft 12 ft. 6 in. in diameter and two shafts 13 ft. 3 in. in diameter as part of the Croton Water Treatment Plant Rehabilitation Project. The shafts will range from 55 ft. to 80 ft. in depth.