Alabama Specifications & Guidelines

Alabama Department of Transportation

ALDOT Standard Specifications for Highway Construction, 2026 Edition

640.03 Minor Utility Adjustments, Construction Requirements

"... When adjusting, installing or otherwise working with non-metallic conduits for underground utilities, the Contractor shall install on the conduit a metallic tape or provide other suitable means whereby the installation can be relocated by electronic detection devices."

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641.03 Water Line, Construction Requirements

"... When installing non-metallic water pipe, the Contractor shall install a metallic tape or locating wire on the pipe or provide other suitable means approved by the Engineer to allow for location by electronic detection devices. ..."

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645.03 Sanitary Sewers, Construction Requirements

"... When installing non-metallic sewer force main pipe, the Contractor shall install a metallic tape on the pipe or provide other suitable means to allow for location by electronic detection devices. ..."

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646.03 Natural Gas Line, Construction Requirements

"... When installing non-metallic gas pipe, the Contractor shall install a detectable tape or locating wire on the pipe or provide other suitable means approved by the Engineer to allow for location by electronic detection devices. ..."

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853.03 Polyvinyl Chloride Sewer Pipe (PVC) and Fittings

"... Marking tape shall be provided for all PVC force mains to allow for locating by location equipment."

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2021 ALDOT Standard and Special Drawings for Highway Construction

I.T.S. - 729 - 003 Type 1 (Open Trench Method) Encasement for Fiber Optic Cable and Condutors (Installed Under New Pavement)

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RLD-008 Details Showing Installation of Electrical Conduit Under Roadways and Ramps, Type 1 and Type 5

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ALDOT Utility Manual, November 2022

2.19.5 Appurtenances, Detection of Non-Metallic Pipe

"... When installing non-metallic pipe underground the utility owner will install suitable markers that will enable the pipe to be located by electronic detection devices. Metallic tape or 12-gauge copper wire may be used for this purpose."

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Links last updated: 
January 12, 2026