PROJECTS
Takoma Substation
As a part of the Capital Grid project, the Takoma Substation, located in Prince George’s County, Maryland, is being upgraded to replace aging equipment and infrastructure. This substation was built in 1932, and it has served the area well for over 85 years. Project work includes installing high capacity transformers and feeders, upgrading the substation structure and equipment to improve performance, aesthetics and reduce the potential for outages, and connecting the substation to the new networked system.
CNC Civil Services provided air and hydro vacuum excavation and test pitting to investigate utility depths and prepared a detailed report for 41 test pits.
Benning Substation
Benning Area Plan is a coordinated effort to continue to improve the reliability of service by upgrading equipment such as utility poles and overhead lines, and adding new technology to the system. Pepco's project activities include replacing, upgrading, and hardening wires and other equipment to improve reliability of existing feeders ; extending an existing feeder to serve additional customers, adding a new feeder; adding equipment and reviewing existing systems for timely outage location identification and enhanced communication with other parts of the system to restore service.
CNC Civil Services performed topographic survey of two (2) substation yards, over 100 Utility test pits, and survey their locations to within 0.04' accuracy. CNC's tasks included field survey for approximately 5,000 linear feet of underground utilities, and office computations to process all data through Carlson traverse adjustment program for use final deliverables.
Downtown Resupply - L Street
Potomac Electric Power Company (Pepco) is planning to install four (4) new 34 kV underground transmission feeders to “L” Street and four (4) new 69 kV underground transmission feeders to “F” Street Substation. These feeders connect the Champlain Substation to resupply both “F” Street and “L” Street substations. “F” Street substation is being rebuilt and as a result, the distribution load needs to be temporarily transferred to “L” Street. The existing 34 kV feeders need to be double-legged, so the station has enough capacity to accommodate the extra load. These new developments are a part of a larger reliability initiative known as the Downtown Resupply.
CNC provided quality level B utility designating and mapping services as part of the project team. Prior to mobilizing, CNC performed thorough records research of all available utility records within the firms’ project limits. CNC then designated and mapped existing underground utilities throughout the corridor at various high-profile locations, including several embassies. CNC’s survey crews field located the utility marks by conventional and GPS survey, including all above-ground utility features (i.e. valves, hydrants, manholes, meters, etc). CNC then performed quality level A utility locating / test hole services at hundreds of locations of critical utility conflicts. Prior to mobilizing, CNC obtained occupancy and construction permits from DDOT and supplied the appropriate traffic control plans for lane closures. CNC provided the client with utility depth, size, and material makeup at these locations. CNC was responsible for managing traffic to ensure the safety of the public as well as the CNC employees working on the job site.
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G Street 4kV Conversion
Potomac Electric Power Company (PEPCO) is extending three (3) 13kV underground distribution feeders from Southwest Substation 018 to switches located at Pennsylvania Avenue & 12th Street SE in Washington, DC. These feeders are to supply the G Street 4kV to 13kV Conversion Project.
CNC provided quality level B utility designating and mapping services as part of the project team. Prior to mobilizing, CNC performed thorough records research of all available utility records within the firms’ project limits. CNC then designated and mapped existing underground utilities throughout the corridor at various high-profile locations, including the Architect of the Capitol. CNC’s survey crews field located the utility marks by conventional and GPS survey, including all above-ground utility features (i.e. valves, hydrants, manholes, meters, etc). CNC then performed quality level A utility locating / test hole services at hundreds of locations of critical utility conflicts. Prior to mobilizing, CNC obtained occupancy and construction permits from DDOT and supplied the appropriate traffic control plans for lane closures. CNC provided the client with utility depth, size, and material makeup at these locations. CNC was responsible for managing traffic to ensure the safety of the public as well as the CNC employees working on the job site.