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Surveys

To develop a pipeline route that minimizes overall impact on landowners, the environment and cultural resources, we conducted a series of civil and environmental surveys within a preliminary study corridor. Throughout the survey process, our survey teams evaluated the proposed route for constructability and environmental impacts, and we worked closely with landowners to address their concerns.

The initial study corridor was approximately 600 feet wide, which allowed room for route adjustments to address landowner, environmental and construction related concerns. Now that surveys are complete and a final route has been determined, the pipeline route will be reduced to a much narrower width – approximately 100 feet for construction and 50 feet for the permanent easement.

NEXUS worked collaboratively with each landowner to perform surveys in a minimal amount of time with little to no inconvenience to their daily lives. While some states have existing laws that allow companies to access private properties for surveys, our preference was always to conduct these surveys with the landowner’s permission. Providing survey access to the property does not authorize NEXUS to build a pipeline on the property, nor does it imply that the landowner supports or agrees with the project.

Below is a brief explanation for each of the main types of surveys we performed.

Civil Surveys

Civil Surveys

Civil surveys involve small crews of four or five personnel walking along the study corridor to identify physical features such as homes and buildings, as well as delineate the boundaries of the study corridor with wooden stakes. Depending upon the length of the proposed study corridor on the property being surveyed, this activity typically takes no longer than two days for each property surveyed.

Additionally, small teams of geologists perform geotechnical investigations to support the engineering design for the crossing of certain sensitive resources, roads and railroads located along the pipeline route. The duration of geological surveys varies depending on the conditions of each property; however, preliminary survey activity is usually completed in one or two days for each property.

Environmental

Environmental

Our specialized teams of environmental scientists perform in-depth surveys to evaluate certain environmental features within the study corridor.

For stream and wetland surveys, small crews of two or three environmental scientists walk along the study corridor to identify wetland areas and surface waters, such as streams and rivers. In addition to marking wetland areas with small colored flags, the crews measure certain water body features, such as width, depth, and ordinary high water mark. Depending on the length of the route on a given property, this activity typically takes no longer than three days for each property surveyed.

For plant and animal species surveys, small crews of ecologists, biologists and botanists walk along the study corridor to identify and analyze the presence of any threatened or endangered species, if a suspected habitat is located within the staked area. Depending on the length of the route of the pipeline on the property being surveyed, this activity typically takes no longer than three days for each property surveyed.

Cultural

Cultural

Cultural resources surveys entail a team of two to four trained archeologists and architectural historians walking within the staked study corridor to identify historic structures such as homes and barns, as well as indicators of potential archaeological resources. If a site is suspected of archeological resources, then the archaeologists would return to that location with spade shovels to perform a limited excavation of a test hole measuring approximately 2×2 feet square and approximately 2 to 3 feet deep. Any area that is excavated for this type of survey is restored to its preexisting condition once surveying is complete. Depending on the length of the route of the pipeline on the property being surveyed, the archaeological walkover typically takes less than one day. If a limited archaeological excavation is necessary, it typically takes no longer than two days, weather permitting.

To reach emergency personnel for NEXUS 24/7, call toll-free

(855) 329-1781

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