Alabama Specifications & Guidelines

Alabama Department of Transportation

ALDOT Standard Specifications for Highway Construction, 2022 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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729.03 Intelligent Transportation Systems, Construction Requirements

"... 7. Installation of Warning Tape.

For Type 1 “Open Trench” Conduit Installations, the Contractor shall place the warning tape within the same ground cut (ditch) as the conduit and locate tone wire as shown on the Plans. Once the conduit and locate tone wire are placed, the cut/ditch shall then be backfilled up to a point no more than 12 inches {305 mm} below grade and at a maximum of 6 inches {152 mm} below grade where the Contractor shall then apply on continuous, unbroken length of the warning tape between the CommBoxes. The cut/ditch shall be completely filled in and prepared to its original state or as specified by the Engineer.

For Type 5 “Directional Bore” Conduit Installations, the warning tape shall not be required unless otherwise indicated on the Plans."

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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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893.10 Conduit, Conductor, Locate Tone Wire, Messenger, and Warning Tape

"Warning Tape shall consist of an underground/buried tape marking the locations of conduits containing fiber optic cables and/or electrical conductors as indicated on the Plans.

Warning tape shall be 3 inch {7.6 cm} wide, elastic PVC, tear resistant, corrosion resistant and durable to extreme weather conditions. The color of the tape shall be orange with “ALDOT FIBER OPTIC CABLE - CALL ALDOT [insert phone number to be provided by the TSMO Engineer]” printed every 3 feet {0.9 meter} in black letters, unless otherwise noted on the Plans.

The physical test methods along with typical properties and values are specified below:

TEST METHOD (TEST SPECIFICATION) - TEST VALUE/UNITS
Standard Weight (ASTM-D2103) - 20 lbs/100 feet
Thickness-overall (ASTM-D2103) - 4 mil
3 in. Tensile Break-MD (ASTM-D882) - 35 lbs/ft
3 in. Tensile Strength-MD (ASTM-D882) - 4 kpsi
3 in. Tensile Break-TD (ASTM-D882) - 38 lbs/ft
3 in. Tensile Strength-TD (ASTM-882) - 5 kpsi
Elongation-MD (ASTM-882) - 530%
Elongation-TD (ASTM-882) - 660%
Tear Strength (ASTM-D2261) - 1.5 lbs/f

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2021 ALDOT Standard and Special Drawings for Highway Construction

I.T.S. - 729 - 003 Open Trench Construction for Fiber Optic Cable

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

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ALDOT Utilities Manual

2.20 Pipeline Guidelines, 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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