TxDOT Encasement RequirementsTexas Administrative Code
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TITLE 43
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TRANSPORTATION
PART 1
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TEXAS DEPARTMENT OF TRANSPORTATION
CHAPTER 21
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RIGHT OF WAY
SUBCHAPTER C
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UTILITY ACCOMMODATION
RULE §21.40
Underground Utilities
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(a) General.
(1) Encasement.
(A) Underground utilities crossing the highway shall be encased in
the interest of safety, protection of the utility, protection of the
highway, and for access to the utility. Casing shall consist of a pipe
or other separate structure around and outside the carrier line. The
utility must demonstrate that the casing will be adequate for the
expected loads and stresses.
(B) Casing pipe shall be steel, concrete, or plastic pipe as
approved by the district, except that if horizontal directional drilling
is used to place the casing, high-density polyethylene (HDPE) pipe must
be used in place of plastic pipe.
(C) Encasement may be of metallic or non-metallic material.
Encasement material shall be designed to support the load of the highway
and superimposed loads thereon, including that of construction
machinery. The strength of the encasement material shall equal or exceed
structural requirements for drainage culverts and it shall be composed
of material of satisfactory durability for conditions to which it may be
subjected. The length of any encasement under the roadway shall be
provided from top of backslope to top of backslope for cut sections,
five feet beyond the toe of slope for fill sections, and five feet
beyond the face of the curb for curb sections. These lengths of
encasement include areas under center medians and outer separations,
unless otherwise specifically addressed in subsections (b) - (f) of this
section.
(D) The department will provide an example graphic upon request of
a typical section showing encasement lengths.
Gentlemen;
Above are the TxDOT requirements for encasement as requested. Please
feel free to contact me at any time concerning this project.
Thanks,
Gary G. Gilmore
TxDOT East Dallas Area Utility / ROW Coordinator
972-225-0465
Gary.gilmore@txdot.gov <mailto:Gary.gilmore@txdot.gov>
Drink. Drive. Go to Jail.
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