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Activities: Locating - the use of nondestructive digging equipment at critical points to determine the precise horizontal and vertical position of underground utilities, as well as their type, size, condition, composition, and other characteristics.
Quality Level "A" Quality Level "A" involves locating and is the highest level presently available. When surveyed and mapped, precise plan and profile information is available for use in making final design decisions. By knowing exactly where a utility is positioned in three dimensional, the designer can often make small adjustments in elevations or horizontal locations and avoid having to relocate utilities. Additional information such as utility composition, condition, size, soil contamination, paving thickness assists the designer and utility owner in their decisions. It is important to note that the end product (the CADD file or project plans) may contain any or all of these quality levels.
Quality Level "A" is the Three-dimensional horizontal and vertical mapping and characterization. This information is obtained through excavation (usually by non-destructive means, such as vacuum excavation) of test holes at points of conflict. This is the highest level of accuracy of subsurface utility engineering data currently available. It provides horizontal and vertical such as elevations, configurations, condition, size, composition, type of backfill, paving type and thickness, presence of contaminates, etc. It is used for engineering, construction, maintenance, remediation, condition assessment, and related efforts.
Three-Dimensional Precision Utility Data at Conflict Points The horizontal map is generally not sufficient for design. When accurate three-dimensional data are required, it is prudent to employ locating (Quality Level "A") services. Using the previously obtained information, potential design conflicts with the utilities are "staked out" in the field. Utilities are exposed through a non-destructive vacuum excavation process. Information is gathered on the exposed utilities and their environment. This information typically includes precise depth and horizontal location, elevation , size, configuration, composition, exterior condition, and cover material.
survey conditions.
of future excavation.
surveyor. The services are covered by special subsurface utility engineering liability insurance.
existing environment and new construction.
Utility Coordination Once the locating information is obtained, actual utility conflicts can be determined and necessary relocations can be planned and managed. Plans for relocating existing utilities are made before construction begins. Costs for relocation are determined and budgeted. Realistic relocation designs are engineered based upon the previous horizontal mapping and locating information.
Please click on Recent Projects for a plan/photograph and brief description of some past representative projects
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Applicable
information is referenced to establish survey control to provide elevations
and