Land Surveying


California High Speed Rail Authority

Right of Way Engineering For Construction

The California High-Speed Rail Authority (Authority) is responsible for building the first high-speed rail system in the nation (San Francisco to Los Angeles).
GIS Surveyors is providing professional land surveying and GIS services to acquire the land rights needed to construct, operate, and maintain the high speed rail corridor. Using our data, the Authority is implementing a state-wide rail modernization plan that will invest billions of dollars in local and regional rail lines to meet the State’s 21st century transportation needs.

Southern California Edison (SCE)

Chino Hills Underground (CHUG)

This “first of its kind project” in the United States involved undergrounding 500KV electricity lines through the Southern California neighborhood of Chino Hills. GIS Surveyors provided staking for all underground utility trenching and appurtenances during construction as well as as-built record map drawings. Energized in the fourth quarter of 2016, multiple contractors constructed this project in order to provide renewable power to Southern California while reducing the impact on neighboring residents.

SoCalGas and SDG&E

Pipeline Safety Enhancement Plan (PSEP)

In response to the San Bruno residential gas explosion in 2010, the California Public Utilities Commission (CPUC) ordered all operators to do pressure tests of the pipeline system across the State. In support of this, GIS Surveyors provided land survey, Right of Way, GIS services, and utility research. This data was crucial in determining pressure weaknesses in the system and enforcing retrofitting actions for a safe gas supply to millions of residents.

San Diego Gas & Electric (SDGE)

Sunrise Powerlink

The Sunrise Powerlink is a 117-mile transmission line that meets the region’s power needs for the 21st century by delivering renewable energy from the Imperial Valley to San Diego County residents and businesses. GIS Surveyors provided land surveying and GIS consulting services to facilitate the construction of the Sunrise Powerlink Project including construction staking, road grade staking, as-built surveys, GIS analysis, and the development of web-based mapping products. The installation of the Sunrise Powerlink is helping battle climate change and keep greenhouse gas emissions in check.


East County Substation Project

The ECO Substation project interconnects SDG&E’s transmission grid with the existing 500 kV Southwest Powerlink transmission line, strengthening this part of the transmission system. GIS Surveyors was responsible for staking the limits of construction and power pole center points for the project as well as providing map exhibits, cartographic products, spatial analysis and web-based mapping solutions developed to assist the project management team in completing this project on schedule. The benefits of the construction of this project include delivering renewable, clean energy and improving reliability of the electric transmission grid.


South Orange County Reliability Enhancement Project (SOCRE)

To improve safety and reliability for South Orange County’s electric utility customers, SDG&E plans to upgrade the decades-old transmission lines, poles and substations in that area. GIS Surveyors provided land surveying services for proposed tower locations, right-of-way easements and access road limits as well as GIS spatial analysis services used in reports to the California Public Utilities Commission to assist SDG&E with project permitting. Upon completion, the benefits of this project will be improved reliability to the existing electric system in south Orange county, a modernized electric transmission system, the ability to meet current and future energy needs of local home and business demands and compliance with federal reliability standards.


Sycamore to Penasquitos Transmission Project (SX-PQ)

The SX-PQ project involved the installation of a new 230kV transmission line. GIS Surveyors provided GIS and land surveying consulting services to assist SDG&E in obtaining a permit to build the new transmission line. GSI obtained LiDAR data for the proposed over-head route in an existing SDG&E transmission corridor, provided staking for proposed power pole and access road locations, and developed GIS database and mapping products to show the aligned GIS route.


Cleveland National Forest Wood to Steel Transmission Project (CNF)

The CNF project involved replacing approximately 2,000 transmission poles from wood to steel in SDG&E services’ territory. GIS Surveyors provided field survey crews to delineate the area to be impacted by the project including roads, construction staking, stringing sites, and helipad sites. GIS databases and mapping products were generated to assist project management team members with operational awareness of the project.


Mapping for the Transmission Engineering & Design (TE&D) Division

GIS Surveyors supports the project management team for the TE&D division of SDG&E. Our GIS databases, maps, and reports are used to assist in the planning of new overhead and underground transmission projects. The SDG&E staff uses these in meetings with the California Public Utilities Commission, public hearings, and internal planning.

Southern California Edison (SCE)

Tehachapi Renewable Transmission Project (TRTP)

The TRTP high-voltage transmission line is capable of carrying 4,500 megawatts of electricity from renewable and other generators in Kern County south to Southern California. GIS Surveyors provided complete land surveying support throughout the varied and difficult terrain of the Angeles National Forest. This included construction layout for tower foundations, grading operations, environmental work limits, and development of AutoCAD as-built drawings. Our mapping exhibits and web based maps were instrumental in providing the project management teams with operational awareness during the course of this project’s construction.

Southern California Edison (SCE)

Eldorado Ivanpah Transmission Project

In an on-going commitment to California’s renewable power goals, the 35 mile EITP project delivers power from solar resources to Southern California and Nevada. GIS Surveyors was the sole source for land surveying on this project providing services for all construction and environmental contractors. Additional benefits to the public from this project include new telecommunications and distribution lines along with added capacity to facilitate access and delivery of new solar generation in California and Nevada.

Los Angeles Department of Water and Power

Barren Ridge Renewable Transmission Project (BRRTP)

The Barren Ridge Renewable Transmission Project is an important power infrastructure project that will deliver renewable wind and solar energy from the Tehachapi Mountains and Mojave Desert areas to Los Angeles. GIS Surveyors provided sole source land surveying and GIS solutions to all project teams associated with construction along a 62 mile Record of Survey filed in Kern and Los Angeles Counties. BRRTP is a major component of LADWP’s Integrated Resources Plan for reducing reliance on coal-fired power.

California Department of Water Resources (DWR)

Land Records Analysis and GIS Mapping

DWR is responsible for managing and protecting California’s water resources and needed an analysis of land records for approximately 1600 miles of levees in CA. GIS Surveyors services included reviewing land title records, deed analysis, record deed mapping, and GIS database development. This supports decisions for the environment, habitat, and people that depend on this water supply.