Table 2

Calculated Electric and Magnetic Fields and Noise Within Right-of-Way

XceI Energy 115 kV Red Rock-Wilson Transmission Line

3 Feet Above the Ground

50-Foot-Wide Right-of-Way

N4aximum Estimated Electric Field (kv/rn) Magnetic Field (mG) Audible Noise (dB(A))

Voltage Loading Left Maximum Right Left Maximum Right Left Maximum Right
Case Circuit Description (kV) (Amps) RIW Value R/W R/W Value R/W R/W Value R/W

1 Existing Single-Circuit Line 121 800 1.0 1.1 1.0 86.7 131.6 86.7 20.4 21.7 20.4

2 Proposed Double-Circuit Line 121 400/400 0.6 0.8 0.6 21.0 36.0 21.0 24.5 25.3 24.5

3a Alternative Single-Circuit Line 121 400 0.4 0.9 0.5 15.9 28.4 18.9 23.0 24.3 23.2
(Tangent Structure)

3b Alternative Single-Circuit Line 121 400 0.3 1.1 0.6 21.3 37.3 27.2 21.8 23.1 22.4
(Light Angle Structure)

4 Alternative Double-Circuit 121 400/400 None None None 1.2 17.2 1.0 None None None
Underground Line

40-Foot-Wide Right-of-Way

\4aximum Estimated Electric Field (kV/m) Magnetic Field (mG) Audible Noise (dB(A))

Voltage Loading Left Maximum Right Left Maximum Right Left Maximum Right
Case Circuit Description (kV) (Amps) R/W Value R]W R/W Value P1W P1W Value R/W

1 Existing Single-Circuit Line 121 800 1.1 1.1 1.1 101.3 131.6 101.3 20.8 21.7 20.8

2 Proposed Double-Circuit Line 121 400/400 0.7 0.8 0.7 25.1 36.0 25.1 24.8 25.3 24.8

3a Alternative Single-Circuit Line 121 400 0.5 0.9 0.7 18.7 28.4 21.8 23.3 24.3 23.6
(Tangent Structure)

3b Alternative Single-Circuit Line 121 400 0.4 1.1 0.7 24.5 37.3 30.7 22.1 23.1 22.7
(Light Angle Structure)

4 Alternative Double-Circuit 121 400/400 None None None 2.4 17.2 2.4 None None None
Underground Line

¹Audible noise is calculated using the standard 5-foot microphone height

EMF calculations assumed a 30-foot average conductor height.

Overhead conductor assumed to be 795 kcmil SSAC 2617. Underground conductor assumed to be 1500 kcmil cable.

Source: Calculations by Commonwealth Associates, Inc.