No GF

So GF

E Bil

Boz-Bil

B-M

Balancing Authority Area Transmission Service Cost Estimates

25 MW Generator Location

Cost (in Millions of

dollars)

South of Great Falls

$0See footnote 1

on the next page

North of Great Falls $8.75

East of Billings $25

Bozeman-Billings $12.5

Missoula-Butte $0

WAPA Unknown

WAPA

Transmission Cost AttributableTo 25 MW Project

25 MW Generator Location

Full/Share (Full-CREP Triggers upgrade,

Share-CREP shares in cost for upgrade)

Cost (in Millions of

dollars)

Total Potential Cost (in Millions

of dollars) Comments

South of Great Falls Full $0 - $14.25 $01

No known congestion at this time with the current TSR queue. If needed, CREP will reconductor the line they are connected to in the SOGF area.

North of Great Falls Full $8.75 $8.75

If needed, CREP will reconductor the line they are connected to in the NOGF area.

East of Billings Full $10 - $25 $25

If needed, CREP will reconductor the line in the Billings area.

Bozeman-Billings Full $10 - $12.5 $12.50

If needed, CREP will reconductor the line in the Bozeman - Billings area.

Missoula-Butte N/A $0 $0

At this time, no transmission congestion has been identified and it is assumed that there is capacity on the lines to accommodate 25 MW.

WAPA NE MT Full N/A Unknown

WAPA interconnection, balancing and regulation reserves, and transmission service costs are unknown.

1. Assumes the project is injecting its power a the Great Falls 230 Switch Yare. Should a project connect on one of 100 kV lines in the south of Great Falls transmission system, there is a likelihood that the 100 kV would need to be reconductored.