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Power Supply Outlook Update
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This is a snapshot of Northwest power supply and electricity
demand. For more information, contact John
Fazio.
February 2008 Summary: The region's power
supply is estimated to be about 2,900 average megawatts surplus (it
takes about 1,000 average megawatts to supply a city the size of
Seattle). The surplus includes about 2,400 average megawatts of
uncontracted regional resources and only counts hydroelectric
generation based on the driest historical condition. The likelihood
of a significant electricity service disruption due to a lack of
resources is forecast to be very low for the next 5 years. In June
of 2008, the Council will reassess the adequacy of the Northwest's
power supply
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Regional load: actual vs. forecasts
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This graph shows how closely
our predictions (blue) for power supply/needs match reality (gray).
The short-term forecast and actual loads both remain below the trend
forecast from the 5th power plan but the gap is closing. |
This graph shows the
difference between actual and long-term forecast on an annual basis. |
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Columbia River runoff volume forecast
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Updated biweekly between January and July
Last updated 07-08-2008
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Reservoir elevations and flows
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Updated daily
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Data for
September 14 |
Elevation
(ft) |
Normal Full
Pool (ft) |
Avg Sep 14 Elevation
for last 10 years (ft) |
| Hungry Horse |
3537.0 |
3561.0 |
3540.5 |
| Libby |
2441.2 |
2459.0 |
2439.6 |
| Grand Coulee |
1281.9 |
1290.0 |
1282.5 |
| Dworshak |
1521.7 |
1600.0 |
1520.1 |
| courtesy
of U of W's DART program |
Data for
September 14 |
Daily Outflow
(kcfs) |
Avg Sep 14 Outflow
for last 10 years (kcfs) |
| Lower Granite |
21.9 |
23.2 |
| The Dalles |
69.3 |
101.8 |
| courtesy
of U of W's DART program |
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The 1st table lists elevations for major U.S.
reservoirs.
The 2nd table lists river flow at key Lower Snake and Columbia
dams. |
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New Northwest generating resources
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Updated quarterly
Last updated July 2008
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New resources either
recently online or coming online soon.
See how much Northwest power comes from hydropower
vs other sources.
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Project
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Location
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Type
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Capacity (MW)
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Energy (MWa)
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Service Date
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Note
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Under construction
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| Diamond Willow |
Fallon Co, MT |
Windpower |
20 |
6 |
2008 |
In MRO reliability area; Est. energy |
| Glacier Wind Energy |
Toole/Glacier Cty, MT |
Windpower |
107 |
34 |
2008 |
Est. energy |
| Goodnoe Hills |
Klickitat Co., WA |
Windpower |
94 |
30 |
Apr 2008 |
Est. energy |
| Grays Harbor |
Satsop, WA |
Natural gas combined-cycle gas turbine |
650 |
As dispatched |
2008 |
Restart of suspended project |
| Marengo II |
Columbia Co., WA |
Natural gas combined-cycle gas turbine |
70 |
23 |
Jun 2008 |
Est. energy |
| Rattlesnake Road |
Gilliam Co., OR |
Windpower |
103 |
33 |
2009 |
Est. energy |
| Simpson Tacoma Cogen |
Tacoma, WA |
Wood residue steam cogen |
55 |
46 |
Aug 2009 |
Est. energy |
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Recently in-service
(last 12 months) |
| Biglow Canyon |
Sherman Co, OR |
Windpower |
125 |
42 |
Dec 2007 |
Est. energy |
Danskin CT1 |
Mountain Home, ID |
Natural gas simple cycle gas turbine |
170 |
As dispatched |
Jun 2008 |
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| Elkhorn |
Union Co, OR |
Windpower |
100 |
33 |
Dec 2007 |
Est. energy |
| Freres Lumber |
Lyons, OR |
Wood waste cogeneration |
10 |
9 |
Dec 2007 |
Est. energy |
| Klondike III |
Wasco Co., OR |
Windpower |
221 |
71 |
Mar 2008 |
Est. energy |
| Marengo |
Columbia Co., WA |
Windpower |
140 |
45 |
Aug 2007 |
Est. energy |
| Mint Farm |
Longview, WA |
Natural gas combined-cycle gas turbine |
319 |
As dispatched |
Jan 2008 |
Restart of suspended project |
| Raft River |
Cassia Co. ID |
Geothermal |
16 |
12 |
Jan 2008 |
Est. energy |
| White Creek |
Klickitat Co., WA |
Windpower |
205 |
60 |
Nov 2007 |
Est. energy |
Suspended
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| Emmett |
Emmett, ID |
Wood waste cogeneration |
11 |
7 |
2007 |
At Boise Emmett mill |
More detail > (~300k
Excel)
Power flow in and out of the region
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Updated daily
Current period: 16AUG08-14SEP08
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Intertie |
Avg power flow |
Direction |
| California (AC+DC) |
3496 mw |
export to California |
| Canada (BC) |
129 mw |
import from Canada |
| Total |
3367 mw |
export |
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This shows how much average power has been imported
and exported in the last 30 days.
For more information, see Bonneville's
intertie analyses
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Acronyms and glossary
DSI - Direct Service Industry, like aluminum processors
intertie - high-voltage transmission lines connecting the Northwest
to other regions
KCFS - thousand cubic feet per second
load - demand
MAF - million acre-feet
MW - megawatt
NMFS - National Marine Fisheries Service |
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