There are two basic ways to construct a natural gas pipeline: the bore method and the trench method.
The trench method of pipeline construction involves digging a trench into which the pipeline is laid and covered by 36 inches or more of soil. During trenching, a temporary construction workspace is needed alongside the pipeline easement. Excavated soil is piled on one side of the trench and used for backfilling after the pipe is installed in the trench. The trench method is often used in areas where construction space is less restrictive.
The bore method is commonly used when there is a need to cross underneath a surface, such as a road, with minimal impact. A guided boring machine creates an underground pathway for the pipeline by drilling a bore from one side to the other. After reaching the opposite side, the machine pulls the string of pipe back through the hole it just created. Typical depths range between three to 60 feet underground.
Site Restoration
TMGS makes every effort to work with landowners to reclaim the easement and repair any damages which might have occurred due to pipeline construction. Depending upon negotiations with the owner or permitting entity, TMGS will restore the land to its original or improved condition, or the property owner will receive compensation for the surface damages, allowing them to complete the restoration of their own property.
Site restoration is only necessary within pipeline construction areas. When the bore method is used, restoration will occur at each end of the bore, while the trench method requires the restoration of the entire length of the easement above the pipeline.
Certain improvements may be made on the easement including sidewalks, driveways and small-scale landscaping. The pipeline route’s impact on existing trees is determined on a case-by-case basis, and often, no trees will be impacted. No deep-rooted trees or permanent structures are allowed to be constructed over an easement. These restrictions are in place to ensure that the pipeline is easily accessible for safety inspections and ongoing maintenance.
Playground equipment at Bicentennial Park in Crowley is located near a natural gas pipeline.