Iowa One Call Links
One Call Resources
Use these resources to review underground facility marking standards, excavation safety guidance, Iowa One Call materials, Iowa Code Chapter 480, and related damage prevention information.
Underground facility marking and safety resources
APWA Uniform Color Code
American Public Works Association APWA Uniform Color Code for Marking Underground Facilities.
CGA Best Practices Guide
Common Ground Alliance (CGA) Best Practices Guide (v 14.0 - March 2017)
Common Ground Iowa
Iowa One Call Video
Iowa One Call Video: Northern Natural Gas - Your Life Matters
Iowa law, manuals, and agency resources
Iowa Code Chapter 480
Iowa Code Chapter 480 (Underground Facilities Information)
Iowa One Call
Excavators Manual
Iowa One Call Excavators Manual (2024) - pdf download
Iowa Utilities Board
Attorney General One Call Law Page
Office of the Attorney General of Iowa - Iowa One Call Law page
Information on damages to underground facilities in Iowa
2017 Pipeline and CGA damage data
2017 (Iowa PHMSA Pipeline and CGA Dirt Data for damages to underground gas pipelines)
Environmental Law Division
Iowa Department of Justice, Office of the Attorney General
Environmental Law Division
1305 E. Walnut St.
Des Moines, IA 50139
P: 515-281-5164
E: webteam@ag.iowa.gov
Jacob Larson, Assistant Attorney General
P: 515-281-5341
E: jacob.larson@ag.iowa.gov
