![Page 1: Bighorn Lake/Yellowtail Dam Operations · 2015. 5. 21. · 3590. 3595. 3600. 3605. 3610. 3615. 3620. 3625. 3630. 3635. 3640. 3645. Nov-14. Dec-14. Jan-15. Feb-15. Mar-15. Apr-15](https://reader036.vdocuments.us/reader036/viewer/2022071212/6023d98c1348516b2e71c645/html5/thumbnails/1.jpg)
Bighorn Lake/Yellowtail Dam Operations November 12, 2014
![Page 2: Bighorn Lake/Yellowtail Dam Operations · 2015. 5. 21. · 3590. 3595. 3600. 3605. 3610. 3615. 3620. 3625. 3630. 3635. 3640. 3645. Nov-14. Dec-14. Jan-15. Feb-15. Mar-15. Apr-15](https://reader036.vdocuments.us/reader036/viewer/2022071212/6023d98c1348516b2e71c645/html5/thumbnails/2.jpg)
Water Year 2014 Review
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0
2
4
6
8
10
12
14
16
18
20
22
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep
Snow
Wat
er E
quiv
alen
t (in
ches
)
Mountain Snowpack
Average 2014 2013
109%
128%
134%
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0
1
2
3
4
5
6
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep
Prec
ipita
tion
(inch
es)
Bighorn River Basin Precipitation
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0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
3600
3605
3610
3615
3620
3625
3630
3635
3640
3645
Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14
Flow
(cfs
)
Lake
Ele
vatio
n (fe
et)
Bighorn Lake Operations 2014
Elevation Inflow River Release
Top of Joint Use: Elevation 3640.0 feet (1,020.6 kaf)
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0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
3600
3605
3610
3615
3620
3625
3630
3635
3640
3645
Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14
Flow
(cfs
)
Lake
Ele
vatio
n (fe
et)
Bighorn Lake Operations 2014
Elevation Inflow River Release
Top of Joint Use: Elevation 3640.0 feet (1,020.6 kaf)
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2014 April-July Forecasts & Rule Curve Targets
Apr-Jul Rule Curve Date Forecast % of Avg Min Elev. Date Jan. 1 1,143,200 107% 3613.3 5/06 Feb. 1 1,140,000 107% 3613.3 5/06 Mar. 1 1,646,700 154% 3606.8 5/16 April 1 1,960,800 183% 3600.4 5/18 May 1 1,952,400 183% 3603.8 5/18 June 1 1,633,384 153% 3619.2 6/01 Actual 1,724,900 161%
![Page 8: Bighorn Lake/Yellowtail Dam Operations · 2015. 5. 21. · 3590. 3595. 3600. 3605. 3610. 3615. 3620. 3625. 3630. 3635. 3640. 3645. Nov-14. Dec-14. Jan-15. Feb-15. Mar-15. Apr-15](https://reader036.vdocuments.us/reader036/viewer/2022071212/6023d98c1348516b2e71c645/html5/thumbnails/8.jpg)
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
3600
3605
3610
3615
3620
3625
3630
3635
3640
3645
Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14
Flow
(cfs
)
Lake
Ele
vatio
n (fe
et)
Bighorn Lake Operations 2014
Elevation Rule Curve Inflow River Release
Top of Joint Use: Elevation 3640.0 feet (1,020.6 kaf)
![Page 9: Bighorn Lake/Yellowtail Dam Operations · 2015. 5. 21. · 3590. 3595. 3600. 3605. 3610. 3615. 3620. 3625. 3630. 3635. 3640. 3645. Nov-14. Dec-14. Jan-15. Feb-15. Mar-15. Apr-15](https://reader036.vdocuments.us/reader036/viewer/2022071212/6023d98c1348516b2e71c645/html5/thumbnails/9.jpg)
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
3600
3605
3610
3615
3620
3625
3630
3635
3640
3645
Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14
Flow
(cfs
)
Lake
Ele
vatio
n (fe
et)
Bighorn Lake Operations 2014
Elevation Inflow River Release
Top of Joint Use: Elevation 3640.0 feet (1,020.6 kaf)
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0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
3600
3605
3610
3615
3620
3625
3630
3635
3640
3645
Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14
Flow
(cfs
)
Lake
Ele
vatio
n (fe
et)
Bighorn Lake Operations 2014
Elevation Inflow River Release
Top of Joint Use: Elevation 3640.0 feet (1,020.6 kaf)
3618.7’
3602.4’
3640.0’ 3641.8’
8,470 cfs 6,160 cfs
6,000 cfs
8,500 cfs
7,000 cfs
2,660 cfs 2,500 cfs
13,780 cfs
1,500 cfs
4,500 cfs
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0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
3600
3605
3610
3615
3620
3625
3630
3635
3640
3645
Oct-13 Nov-13 Dec-13 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14
Flow
(cfs
)
Lake
Ele
vatio
n (fe
et)
Bighorn Lake Operations 2014
Elevation Inflow River Release
Top of Joint Use: Elevation 3640.0 feet (1,020.6 kaf)
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Water Year 2015 Fall and Winter Outlook
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Elevation 3637.5 - 2.5 feet below full pool 2.9 feet lower than last year Storage 989,700 acre-feet: 111% of average 97% full Inflows 2,200 cfs Outflow 3,000 cfs
Conditions on November 1, 2014
![Page 14: Bighorn Lake/Yellowtail Dam Operations · 2015. 5. 21. · 3590. 3595. 3600. 3605. 3610. 3615. 3620. 3625. 3630. 3635. 3640. 3645. Nov-14. Dec-14. Jan-15. Feb-15. Mar-15. Apr-15](https://reader036.vdocuments.us/reader036/viewer/2022071212/6023d98c1348516b2e71c645/html5/thumbnails/14.jpg)
November through March Gains and Release
April-October Gain = 320,800 acre-feet Calculated November-March Gain = 268,900 acre-feet Upstream Reservoir Fall & Winter Releases = Boysen = 940 cfs Buffalo Bill = 365 cfs End-of-October Storage = 989,700 acre-feet Projected End-of-March Target Elevation = 3617 Calculated Fall & Winter Release for Yellowtail: River = 2,880 cfs
![Page 15: Bighorn Lake/Yellowtail Dam Operations · 2015. 5. 21. · 3590. 3595. 3600. 3605. 3610. 3615. 3620. 3625. 3630. 3635. 3640. 3645. Nov-14. Dec-14. Jan-15. Feb-15. Mar-15. Apr-15](https://reader036.vdocuments.us/reader036/viewer/2022071212/6023d98c1348516b2e71c645/html5/thumbnails/15.jpg)
November through March Gains and Release
April-October Gain = 320,800 acre-feet Calculated November-March Gain = 268,900 acre-feet Upstream Reservoir Fall & Winter Releases = Boysen = 940 cfs Buffalo Bill = 365 cfs End-of-October Storage = 989,700 acre-feet Projected End-of-March Target Elevation = 3619 Calculated Fall & Winter Release for Yellowtail: River = 2,830 cfs
![Page 16: Bighorn Lake/Yellowtail Dam Operations · 2015. 5. 21. · 3590. 3595. 3600. 3605. 3610. 3615. 3620. 3625. 3630. 3635. 3640. 3645. Nov-14. Dec-14. Jan-15. Feb-15. Mar-15. Apr-15](https://reader036.vdocuments.us/reader036/viewer/2022071212/6023d98c1348516b2e71c645/html5/thumbnails/16.jpg)
November Monthly Operating Plans
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0
2,000
4,000
6,000
8,000
10,000
Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15
Riv
er F
low
(cfs
)
Approximate Powerplant Capacity
3590
3595
3600
3605
3610
3615
3620
3625
3630
3635
3640
3645
Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15
Elev
atio
n (fe
et)
Most Probable Inflow Operations
Top of Joint Use: Elevation 3640.0 feet (1,020.6 kaf)
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3590
3595
3600
3605
3610
3615
3620
3625
3630
3635
3640
3645
Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15
Elev
atio
n (fe
et)
Most and Minimum Probable Inflow Operations
Top of Joint Use: Elevation 3640.0 feet (1,020.6 kaf)
0
2,000
4,000
6,000
8,000
10,000
Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15
Riv
er F
low
(cfs
)
Approximate Powerplant Capacity
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3590
3595
3600
3605
3610
3615
3620
3625
3630
3635
3640
3645
Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15
Elev
atio
n (fe
et)
Most and Maximum Probable Inflow Operations
Top of Joint Use: Elevation 3640.0 feet (1,020.6 kaf)
0
2,000
4,000
6,000
8,000
10,000
Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15
Riv
er F
low
(cfs
)
Approximate Powerplant Capacity
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3590
3595
3600
3605
3610
3615
3620
3625
3630
3635
3640
3645
Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15
Elev
atio
n (fe
et)
Most, Minimum, and Maximum Probable Inflow Operations
Top of Joint Use: Elevation 3640.0 feet (1,020.6 kaf)
0
2,000
4,000
6,000
8,000
10,000
Nov-14 Dec-14 Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15
Riv
er F
low
(cfs
)
Approximate Powerplant Capacity
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www.usbr.gov/gp/lakes_reservoirs/wareprts/main_menu.html
• near real-time data available through the HYDROMET data system
• summaries and plots of historical data • annual reservoir operating plan publication • monthly water supply reports • project data • snow plots • links to related internet sites
Reclamation’s Internet Website
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Questions and Comments