6953 04/18

Legend

Electron Heights to Enumclaw 55 kV to 115 kV conversion projects

Existing substation

Future 115kV substation

115kV transmission line operating at 115kV Existing 115kV transmission operating at 55kV Existing 55kV transmission line to remain 55kV (to Greenwater)Future 115kV transmission line New 115kV transmission line to operate at 55kV (to Greenwater)

264th Ave. S

E

410

410

164

169

162

162

165

162

162

Lake Tapps169

1. Build roughly 1.5 miles of 115kV transmission line (to operate at 55 kV) from Enumclaw substation (Battersby Ave)), along Garrett Street (following existing distribution line) to the existing 55 kV transmission line east on Stevenson Ave.

2. Upgrade electrical equipment at our Enumclaw substation on Battersby Ave in Enumclaw.

3. Install a 115 kV capacitor bank within our Krain Corner substation (268th Ave SE, Enumclaw).

4. Build a new 115 kV transmission line to a new Buckley substation off 112th St E and install a new fiber line between the new Buckley substation and Krain Corner substation.

5. Rebuild the Wilkeson substation from 55 kV to 115 kV and install a new 115 kV transformer and other related equipment.

6. Demolish the old Buckley substation. 7. Remove the old 55 kV equipment from the Electron Heights substation. 8. Convert the entire transmission system voltage from operating at 55 kV to

operate at 115 kV. This conversion means the red line on the map will begin operating at 115kV.

12

3

6

4

5

7

8

165

Electron Heightssubstation

Wilkesonsubstation

Buckleysubstation

(new)

Buckley substation(removed after future

is in operation)

Enumclawsubstation

165

165

165

410

Krain Cornersubstation

410