New Pipeline Installation

CobbFendley was responsible for the engineering and design of over 10 miles of proposed 12-inch high pressure distribution main to provide increased capacity and system reliability for Northwest Harris County, connecting two existing high pressure systems.  Over 10 engineered HDDs were proposed ranging from 600 feet to over 3,700 feet long. The project was designed to be piggable with pig traps installed at each end of the system. Three proposed regulator stations were designed to feed the local distribution system from the newly installed pipeline which included station design and layout, access layout, fence detail, and grounding.

The newly installed pipeline will initially be cathodically protected by sacrificial anodes throughout the multi-phase project.  Insulators were installed at each end to tie-in to the existing high pressure systems.  Jumpers were installed to allow flexibility to bond to the existing systems, with impressed current, to create one large system or to keep the systems separate.  An engineered AC mitigation design was included to protect the proposed pipeline from AC induction within the high voltage electric transmission corridor, which included SSDs, zinc ribbon, ground rods, and coupon test stations.  Barriers were installed around the SSDs to protect them from mowers and construction of the surrounding neighborhood development.