Global Navigation Satellite System (GNSS) off I-15 in San Diego County
Summary
SCH Number
2026060070
Public Agency
California Department of Transportation, District 11
(DOT)
Document Title
Global Navigation Satellite System (GNSS) off I-15 in San Diego County
Document Type
NOE - Notice of Exemption
Received
Posted
6/2/2026
Document Description
Caltrans District 11 Land Surveys Division proposes to install a Global Navigation Satellite System (GNSS) Real Time Network (RTN) Base Station within Caltrans Right-of-Way to support the department geospatial activities in this area. This is needed by the Land Surveys division to supplement other stations in the area as part of the Caltrans Spatial Reference Network (CTSRN). This network supports geospatial positioning for Land Surveys, Construction, and other divisions in the department. This station consists of a cabinet mounted atop a small (±25 square foot) concrete pad. It will have a solar panel mounted to it. There is also a GNSS antenna mount about 15’ away, which consists of four 1” stainless steel rods driven 15’ – 20’ into the ground (1 vertical and spaced at 120°) that converge to a point about 5’ above ground. A GNSS antenna and radome are mounted atop the rods. There is a conduit running between them 1’ – 2’ below ground. Caltrans will provide its own power using a solar panel and battery.
Contact Information
Name
Emery McCaffery
Agency Name
Caltrans
Job Title
Environmental Scientist
Contact Types
Lead/Public Agency / Project Applicant
Phone
Location
Cities
San Diego, unincorporated area
Counties
San Diego
Regions
Countywide
Other Location Info
West side of I-15 approximately 2.5 miles south of community of Rainbow at postmile 50 in San Diego County
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
15301
Reasons for Exemption
Project consists of the repair, maintenance, of existing public or private structures, facilities, mechanical equipment, or topographical features, involving negligible or no expansion of existing or former use. Specifically, Caltrans proposes to install a Global Navigation Satellite System (GNSS) Real Time Network (RTN) Base Station within Caltrans Right-of-Way to support the department geospatial activities in this area. This is needed by the Land Surveys division to supplement other stations in the area as part of the Caltrans Spatial Reference Network (CTSRN).
Attachments
Notice of Exemption
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