Electric Supply Cable Route in Nantucket Sound

Geospatial data from 1994 and 1996 shows the location of a 46kV submarine electric supply cable between Harwich Port, Cape Cod and Nantucket Harbor, Massachusetts. The line feature was created by SCIOPS using coordinates from a 1996 National Grid drawing and incorporates data from a marine survey conducted in 1994.

Use Cases

• Mapping the precise geographic route of the National Grid Nantucket Cable No. 1 using the provided line feature.
• Analyzing the cable's path in relation to other marine features using its geospatial coordinates.
• Referencing the 1994 marine survey data to understand seabed conditions along the cable route.
• Using the as-built survey representation from the 1996 drawing for infrastructure verification.

Strengths

• Data is based on an as-built survey drawing from the project's completion in 1996.
• Incorporates marine survey data from two specific periods in 1994 (June 26-July 4 and August 10-12).

Limitations

• The underlying survey data is from 1994, making it over 30 years old and potentially not reflecting current seabed conditions.
• The dataset describes only one of two cable lines in the area, providing an incomplete picture of the full infrastructure.

Provenance

Source

National Grid (Nantucket Cable Project drawing) and Ocean Surveys Inc. (marine survey).

Collection Method

Line feature created from hardcopy geographic coordinates in a 1996 drawing; marine survey performed in 1994.

Time Range

1994 (survey), 1996 (drawing).

Geography

Nantucket Sound, Massachusetts, from Harwich Port, Cape Cod to Nantucket Harbor.