Haw. Code R. § 19-105-12 - Underground utility crossings
(a) All new utility
installations involving pressure pipelines shall comply with the American
National Standards Institute (ANSI) code for pressure piping B31.1, B31.4 and
B31.8. Installations for electric and communication systems shall comply with
State of Hawaii "Public Utilities Commission's General Order No. 10" (Hawaii
Administrative Rules, title 6, chapter 70).
(b) All utility installations carrying
flammable and combustible products shall meet the requirements of the: Part
192, Title 49 Code of Federal Regulations, Minimum Safety Standards for Gas
Lines: national fire code; State of Hawaii "Public Utilities Commission's
General Order No 9" (Hawaii Administrative Rules, title 6, chapter 69); and
local county and state codes and requirements.
(c) Utilities crossing underground below the
roadways of freeways shall be of durable materials and so installed as to
virtually preclude any necessity for disturbing the roadways to perform
maintenance or expansion operations. Utility lines shall be encased or
jacketed. See exhibit "A" attached at the end of this chapter for terminology
for encasement and other protection. Casing shall consist of a pipe or other
separate structure around and outside of the carrier line or duct line and
shall be designed to support the load of the highway and superimposed loads
thereon, and shall equal or exceed structural requirements for drainage
culverts. The casing shall be composed of materials of satisfactory durability
under conditions to which they may be exposed.
(d) Upon the completion of a new freeway, all
utility installations shall be installed by the boring, jacking or tunneling
method.
(e) The minimum depth of
utility lines shall be 3 feet from the finished grade of pavement to sleeve or
concrete jacket in pavement areas. The director may reduce the 3-foot minimum
clearance specified above to 2 feet if ground conditions are ascertained to be
of rocky material, provided the utility lines do not encroach into the pavement
structure.
(f) A utility shall make
every effort to plan, coordinate, converge, and construct its installation in
conjunction with the highway construction. A utility shall further give
considerations to the construction of a joint utility tunnel with other
utilities or sleeves at strategic locations to accommodate future utility
crossings in conjunction with the highway construction.
Notes
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