90MWI32-301 — Excavation Authorization Procedures

90MWI32-301 governs excavation authorization procedures for protecting underground utilities, sensitive environments, and historic and outlying facilities.

Search 90MWI32-301

  • Publication number: 90MWI32-301
  • Title: EXCAVATION AUTHORIZATION PROCEDURES
  • Date: 2022-09-28

View 90MWI32-301 on armypubs.army.mil


It covers utility-location coordination, excavation requests, AF IMT 103 processing, permit validity, emergency requests, and underground utility marking codes. It requires excavation areas to be identified, requests to include specified information, markings to be maintained, and signed permits to remain on site during excavation.

Applies to: It applies to 90th Missile Wing, 20th Air Force, associated and tenant units assigned, attached, or supported by the 90th Missile Wing, Francis E. Warren Air Force Base.

Topics covered

  • Underground utility coordination
  • Excavation requests
  • AF IMT 103 processing
  • Digging permits
  • Utility marking codes
  • Emergency excavation requests

Questions and answers

Who makes Wyoming One-Call requests for digging permits?

All Wyoming One- Call requests will be made by the Base Civil Engineer’s Requirements and Optimization section.

How long is a signed excavation form valid?

When signed by 90 CES/CEO or 90 CES/CEN Flight Chief or delegated authority, the form is valid for 14 calendar days and excavation may begin. (paragraph 3-18)

How long must the signed AF IMT 103 remain on site?

Original signed AF IMT 103 or a copy of the signed original must remain on site at all times during excavation. (paragraph 3-18)

What color marks gas, oil, petroleum, or gaseous material utilities?

YELLOW - Gas, oil, petroleum or gaseous materials. (paragraph 3-18)

What does 90MWI32-301 require if excavation work exceeds 14 calendar days?

If work is to exceed the initial 14 calendar days, the requester must renew digging permit for an additional 14 calendar days. (paragraph 3-18)

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