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PROPOSALFOR
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<br />RFP N0.. 23-030
<br />reviews of all projects, whenever possible, in order to
<br />obtain relevant site information.
<br />Surveying Approach: Our cutting -edge surveyors
<br />utilize the latest in ground survey equipment to
<br />perform topographic, boundary, right-of-way, ALTA,
<br />GIS data collection and control network surveys. All
<br />survey work is performed under the supervision of a
<br />Professional Land Surveyor, licensed in California.
<br />Tetra Tech surveyors utilize a combination of
<br />GPS and Robotic Total stations to perform most
<br />traditional surveys. Additionally, technologies such as
<br />Unmanned Aerial Systems (LAS), Vehicle mounted
<br />mobile LiDAR mapping, aerial photogrammetry and
<br />LiDAR, and terrestrial LiDAR scanning are available
<br />to supplement the City's survey needs. These
<br />technologies, combined with traditional techniques
<br />can increase efficiency and accuracy, while reducing
<br />staff exposure to dangerous situations.
<br />Our licensed surveyors can assist the City with
<br />all surveying and mapping needs, including the
<br />following:
<br />Each project will dictate the survey necessary and
<br />the level of accuracy. For example at a minimum for
<br />a project that affects the design and construction of a
<br />roadway, such as a Green Street or Complete Street
<br />Project, survey data will be collected with very high
<br />levels of accuracy. This may include, on a project
<br />specific basis, the survey of each intersection,
<br />including curb returns (BCRs/ECRs) and 25-feet to
<br />50-feet beyond, traffic signalization (controllers and
<br />signal detector loops), utility information, detailed
<br />information of existing curb ramps to verify ADA
<br />compliance and all other visual features. Along
<br />roadway corridors, 50-foot cross sections will be
<br />collected with additional cross sections included as
<br />directed by the engineering team, the City or at the
<br />surveying team's discretion. The corridor survey will
<br />include locations where sags, uplifts, depressions,
<br />deficiencies and other irregularities are present. Site
<br />features including pathways, sidewalks, roof and site
<br />drainage features, red curbs, house numbers will
<br />be noted, driveways, parking locations, and utility
<br />features (valve covers, manholes, fire hydrants, utility
<br />poles, guy wires, etc.) will be collected. As needed
<br />damaged pavements, sidewalks, curbs vaults or
<br />other feature will be noted at the time of the survey.
<br />Prior to the detailed design, the field survey will be
<br />visually verified by the engineering team.
<br />Utility Research and Coordination: The locations
<br />of existing utilities on a project site are critically
<br />important for facility design, any subsurface
<br />investigations, or any earthwork during construction.
<br />Tetra Tech will obtain and research all plans
<br />showing the locations and sizes of all aboveground
<br />and underground utility lines and appurtenances
<br />within the proposed project area. Research will
<br />include researching Prior Rights to clearly identify
<br />parties responsible for any relocation of conflicting
<br />utilities. Additionally, our coordination efforts will
<br />include researching whether any future utilities
<br />are proposed in the project area that may require
<br />accommodation through the improved area. When
<br />appropriate (particularly before any ground -disturbing
<br />activities on site), we will employ geophysical survey
<br />techniques, or Dig -Alert type services to physically
<br />locate any subsurface utility lines. Tetra Tech will
<br />perform a field review of all utility line locations and
<br />verify that the plotted or surveyed locations for all
<br />existing lines shown on drawings are correct.
<br />City of Santa Ana
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