1. (1) A fair, just, reasonable, and sufficient rate for attachments to or in facilities shall assure the owner the recovery of not less than all the additional costs of procuring and maintaining the attachments, nor more than the actual capital and operating expenses, including just compensation, of the owner attributable to that portion of the facility used for the attachments, including a share of the required support and clearance space, in proportion to the space used for the attachment, as compared to all other uses made of the facility, and uses that remain available to the owner.

2. (2) The following formula for determining a fair, just, reasonable, and sufficient rate shall apply to attachments to poles:

   Maximum Rate

   =

   Space Factor

   x

   Net Cost ofa Bare Pole

   x

   CarryingCharge Rate

   Where Space Factor	=	Occupied Space
   Total Usable Space

3. (3) The following formula for determining a fair, just, reasonable, and sufficient rate shall apply to attachments to ducts or conduits:

   MaximumRate perLinear ft./m.

   =

   [

   1

   x

   1 Duct

   ]

   x

   [

   Number

   x

   Net Conduit Investment

   ]

   x

   CarryingChargeRate

   Number ofDucts

   Number ofInner Ducts

   of Ducts

   System Duct Length (ft./m.)

   (Percentage of Conduit Capacity)

   (Net Linear Cost of a Conduit)

   simplified as:

   MaximumRate perLinear ft./m.

   =

   [

   1 Duct

   ]

   x

   [

   Net Conduit Investment

   ]

   x

   CarryingChargeRate

   No. of Inner Ducts

   System Duct Length (ft./m.)

   If no inner duct or only a single inner duct is installed, the fraction "1 Duct divided by the Number of Inner Ducts" is presumed to be 1/2.

   Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency.

[Statutory Authority: RCW 80.01.040, 80.04.160, 80.54.020, and 80.54.060. WSR 15-21-090 (Docket U-140621, General Order R-582), § 480-54-060, filed 10/21/15, effective 1/1/16.]