Overview
The Rios Group completes all Subsurface Utility Engineering (SUE) services in accordance with the recommended practices and procedures described in ASCE publication CI/ASCE 38-22 “Standard Guidelines for the Collection and Depiction of Existing Subsurface Utility Data.” As described in the publication, four levels have been established to describe and depict the quality of subsurface utility information.
SUE Leadership
SUE Four Levels of Quality Offered
Quality Level D (QLD)
Information obtained from existing utility records.
Quality Level C (QLC)
Surveyed data depicting visible above-ground features supplemented with QLD information.
Quality Level B (QLB)
Two-dimensional horizontal information obtained through the application and interpretation of non-destructive surface geophysical methods. Also known as “designating,” this level incorporates QLC and QLD information and provides surveyed horizontal positioning of subsurface utilities.
Quality Level A (QLA)
Three-dimensional horizontal and vertical information obtained through non-destructive vacuum excavation equipment to expose utilities at critical points. Also known as “locating,” this level incorporates QLB information and provides precise horizontal and vertical positioning of subsurface utilities.
Contact Us
For general information or to discuss a request for proposal, please complete the form below and we will be in touch within 24 hours. Thanks for your interest.
For general information or to discuss a request for proposal, please complete the form below and we will be in touch within 24 hours. Thanks for your interest.