Investor Presentaiton
L
MegaWatts (MW)
Appendix 34
Accredited Capacity Contribution in Montana
NorthWestern Energy Montana - Accredited Capacity Contribution of Resources
(2020 Resource Mix of Owned and Long-Term Contracted Resources)
60%
600 Total Nameplate Capacity (MW):
1,467
Total Accredited Capacity Contribution (MW):
2020 Peak Load (MW):
835
Capacity
Contribution
13%
1,200
Capacity
Contribution
484
500
455
400
98%
92%
Capacity
Contribution
Capacity
300
Contribution
222
202 197
97%
204
200
100
Capacity
Contribution
87
84
0
Natural Gas
Thermal - Long-
Term Contracted
Coal - Owned
290
Hydro
Wind
5%
Capacity
Contribution
59
17
1
Solar
■Nameplate Capacity (MW)
■Accredited Capacity Contribution (MW)
Accredited Capacity Contribution is the ability of each resource fuel-type to contribute to meet demand during
peak energy usage by customers.
Accredited Capacity Contribution or Peak Load Contribution is based on Effective Load Carrying Capability
(ELCC) E3 Study on Peak Load Measurement included in North Western Energy's 2020 Supplement to the
2019 Montana Electric Supply Resource Procurement Plan.
Note: 2020 Nameplate Capacity MW's include resources that are on-line or in service as of 12/31/2020.
Thermal long-term contracted resources of Yellowstone Energy Limited Partnership (YELP) and Colstrip
Energy Limited Partnership (CELP) are listed at their contracted capacity rather than nameplate capacity.
On a megawatt basis, wind generation
comprises a very significant portion of
our electric generation portfolio.
However, based upon its 13%
accredited capacity, it provides a much
less significant contribution to our
overall capacity deficit.View entire presentation