Washington Administrative Code › Title 468 - Transportation, Department of (See Title 88) › Chapter 468-34 - Utility lines - Franchises and permits › Section 468-34-270 - Installations on highway structures

Current through Register Vol. 24-14, July 15, 2024
Attachment of utility lines to a highway structure may be
				allowed where such attachment shall conform to sound engineering considerations
				for preserving the highway, its safe operation, maintenance and appearance. The
				attachment shall be in accordance with the following:
(1) Each proposed bridge attachment should be
			 considered on its individual merits and separately designed so as to be
			 compatible with the appearance of the structure.
(2) Bridge attachment of a utility should not
			 be considered unless the structure in question is of a design that is adequate
			 to support the additional load and to accommodate the utility facility without
			 compromise of highway features, including reasonable ease of bridge
			 maintenance.
(3) Utility
			 positionings on a structure which would inhibit access to any structure part
			 for bridge painting, repair or maintenance should not be allowed. Manholes for
			 utility access shall not be allowed in the bridge deck on
			 overcrossings.
(4) Attachment on a
			 structure of a pipeline carrying a hazardous transmittant shall be avoided
			 where practical.
(5) The utility
			 attachment shall not effectively reduce the clearance of the structure where
			 such clearance is critical.
(6)
			 Generally, utility attachments should be beneath the structure's floor, between
			 the girders or beams or within a cell and at an elevation above low
			 superstructure steel or masonry. Attachment to the outside of the bridges
			 should be avoided where there are reasonable alternatives.
(7) Utility mountings should be of a type
			 which will not create noise resulting from vibration.
(8) The hole created in the bridge abutment
			 shall be of the minimum size necessary to accommodate the utility line. The
			 hole shall be sealed to prevent any leakage of water or backfill
			 material.
(9) The utility line back
			 of the bridge abutment should curve or angle out to align outside the roadbed
			 area in as short a distance as is operationally practicable.
(10) Acceptable utility attachment methods
			 are hangers and/or roller assemblies suspended from inserts in the underside of
			 the bridge floor or from hanger rods clamped to the flange of some substructure
			 member or as otherwise specified by the department.
(11) Utility construction shall conform to
			 applicable codes, standards and specifications.
(12) The utility company shall be responsible
			 for any restoration or repair of any portion of bridge or highway disturbed by
			 the utility installation or use.
(13) Communication and electric power line
			 attachments shall be suitably insulated, grounded, and carried in protective
			 conduit or pipe from point of exit from ground to reentry. The cable shall be
			 carried to a manhole located beyond the backwall of the structure. Carrier pipe
			 and casing pipe shall be suitably insulated from electric power line
			 attachments.
(14) WAC
			 468-34-210 shall apply to
			 installations on structures.
Statutory Authority: 1977 ex.s. c 151. 79-01-033 (DOT Order
				  10 and Comm. Order 1, Resolution No. 13), § 468-34-270, filed 12/20/78.
				  Formerly WAC 252-04-235.