Section 19-105-13 - Utility crossings at highway structures(a) On active projects: (1) A utility may be supported by hangers or brackets attached to a structure and left exposed provided: (A) It is shielded from public view and is not visible from the freeway;(B) It can be accommodated without substantial increase in sections of the structure; and(C) It can be serviced without access from the freeway through-traffic roadways or ramps. See exhibit "N" attached at the end of this chapter.(2) A utility may be carried within a structure or through a box girder provided: (A) It will not adversely affect the structure;(B) An appropriate sleeve or concrete encasement is utilized;(C) It can be serviced without access from the freeway through-traffic roadways or ramps; and(D) That provisions for servicing the utility are incorporated in the design of the utility. See exhibits "L" and "M" attached at the end of this chapter.(3) Large utility lines or groups of lines may be supported on a separate utility structure provided provisions for servicing the utility are incorporated in the design of the structure. See exhibits "L" and "M" attached at the end of this chapter.(4) Liquid fuel lines other than fuel oil will not be permitted on structures.(b) On completed projects: On previously constructed state projects, a utility may be supported by hangers or brackets attached to a structure and left exposed provided they conform to the "active project" requirements specified in subsection (a) of this section. See exhibit "N" attached at the end of this chapter.(c) General requirements for utility crossings:(1) The encasing pipe shall be carried out for a minimum of 20 feet beyond the back of the bridge abutment.(2) Support of utility lines on structure shall in no way interfere with free movements of structure.(3) Location, size and number of utility lines permissible on bridge shall be determined by the State.(4) Design and installation of utility pipe lines shall conform to the requirements of section 19-105-12 and the AASHTO policy specified in section 19-105-10.(d) Domestic gas lines: (1) For gas lines, casing shall be provided with vents near abutments.(2) The maximum size of gas lines inside box girders shall be 6 inches.(3) Maximum pressure allowed in gas lines on highway structures shall be 65 PSIG (pounds per square inch gauge).(4) Gas lines and casings on structures shall be provided with cathodic protection where necessary.[Eff. MAY 30 1981 (Auth: HRS Sec. 264-24) (Imp: HRS Sec. 264-23)