Wash. Admin. Code § 468-34-290 – Vertical clearance

The vertical clearance for overhead power and communication lines above the highway and the lateral and vertical clearance from bridges shall conform with the National Electrical Safety Code and/or with the clearances as shown below, whichever is greater.

type of utility line	lines crossingroadways	longi-tudinal
Communications and Cable Television	24'	20'
Communications and/or Cable Television joint usage with electrical	20'	20'
electrical
0 - 750 volts	24'	24'
751 - 15,000 volts	30'	27'
15,001 - 50,000 volts	32'	32'
50,001 volts and over	34'	32'

(1) The minimum height of highway crossing shall be measured from the point of the roadway directly under the crossing.
(2) The minimum height of longitudinal lines shall be measured from ground line.
(3) All clearances shall be at State Electrical Construction Code temperature and loading standards, and comply with all other requirements of this code.

[Statutory Authority: Chapter 47.44 RCW. WSR 89-05-022 (Order 119), § 468-34-290, filed 2/10/89. Statutory Authority: 1977 ex.s. c 151. WSR 79-01-033 (DOT Order 10 and Comm. Order 1, Resolution No. 13), § 468-34-290, filed 12/20/78. Formerly WAC 252-04-255.]