Assigned to NREW FOR COMMITTEE
ARIZONA STATE SENATE
Fifty-Sixth Legislature, Second Regular Session
FACT SHEET FOR H.B. 2002
power plants; transmission lines; definition
Purpose
Specifies that the definition of transmission line excludes a substation or switchyard
located on the substation, switchyard or generating site to which the line connects.
Background
Transmission line means five or more new structures that span more than one mile in length
as measured from the first structure outside of the substation, switchyard or generating site to
which the line connects to the fifth structure and that are erected above ground and support one or
more conductors designed for the transmission of electric energy at nominal voltages of 150,000
volts or more and all new expenditures or financial commitments for land acquisition, materials,
construction or engineering exceeding $50,000 have not been made before August 13, 1971. A
transmission line does not include structures located on the substation, switchyard or generating
site to which the line connects (A.R.S. ยง 40-360).
A substation is a high-voltage electric system facility. It is used to switch generators,
equipment and circuits or lines in and out of a system. It is also used to change alternating current
voltages from one level to another or change alternating currents to direct current. A switchyard is
a substation without transformers that functions solitary at a single voltage level (OSHA).
There is no anticipated fiscal impact to the state General Fund associated with this
legislation.
Provisions
1. Specifies that a transmission line does not include a substation or switchyard, in addition to
structures, that are located on the substation, switchyard or generating site to which the line
connects.
2. Makes conforming changes.
3. Becomes effective on the general effective date.
House Action
NREW 1/23/24 DP 7-2-0-0
3
rd
Read 2/27/24 41-17-1-0-1
Prepared by Senate Research
March 19, 2024
RA/KP/slp