Aspinall UnitSeasonal Operation Goals

• Fill Blue Mesa Reservoir before end of runoff.• Operate to the 2012 Aspinall ROD at the Whitewater Gage.• Meet the NPS Black Canyon water right peak flow.• Meet all state water right needs on the river downstream.• Maximize hydro power production.• Meet Blue Mesa Reservoir End of December ice target of 7490.0 ft• Meet flood control needs of storing water in Blue Mesa Reservoir

and to avoid flooding down river in the town of Delta.• Adjust river flows for diversion needs through the Gunnison

Diversion Tunnel.• Adjust flows for trout spawning needs in the fall and spring months.

6400 cfs

March 15 Forecast850 KAF

200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 15000

2000

4000

6000

8000

10000

12000

14000

16000

Peak Flow Target at Whitewater

Forecast BM Apr-Jul Inflow (thousand af)

Pe

ak

Q (

cfs

)

DRY

WETMODWET

AVGWET

AVGDRY

MODDRY

Apr-July Forecast Half bank Duration Peak Flow Duration (1000 AF) (days @ 8,070 cfs) (days @ up to 14,350 cfs) <381 0 0 381-516 0 0 516-709 10 0 709-831 20 2 831-1123 40 10 >1123 60 15

14,350 cfs

3/21

/201

43/

25/2

014

3/29

/201

44/

2/20

144/

6/20

144/

10/2

014

4/14

/201

44/

18/2

014

4/22

/201

44/

26/2

014

4/30

/201

45/

4/20

145/

8/20

145/

12/2

014

5/16

/201

45/

20/2

014

5/24

/201

45/

28/2

014

6/1/

2014

6/5/

2014

6/9/

2014

6/13

/201

46/

17/2

014

6/21

/201

46/

25/2

014

6/29

/201

47/

3/20

147/

7/20

147/

11/2

014

7/15

/201

47/

19/2

014

7/23

/201

47/

27/2

014

7/31

/201

48/

4/20

148/

8/20

148/

12/2

014

8/16

/201

48/

20/2

014

8/24

/201

48/

28/2

014

9/1/

2014

9/5/

2014

9/9/

2014

9/13

/201

49/

17/2

014

9/21

/201

49/

25/2

014

9/29

/201

410

/3/2

014

10/7

/201

410

/11/

2014

10/1

5/20

1410

/19/

2014

10/2

3/20

1410

/27/

2014

10/3

1/20

1411

/4/2

014

11/8

/201

411

/12/

2014

11/1

6/20

1411

/20/

2014

11/2

4/20

1411

/28/

2014

12/2

/201

412

/6/2

014

12/1

0/20

1412

/14/

2014

12/1

8/20

1412

/22/

2014

12/2

6/20

1412

/30/

2014

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

7440.00

7445.00

7450.00

7455.00

7460.00

7465.00

7470.00

7475.00

7480.00

7485.00

7490.00

7495.00

7500.00

7505.00

7510.00

7515.00

7520.00

Aspinall 2014 Projected Operations 850,000 AF Forecast(1996 Pattern Year)

Inflow

Crystal Release

Tunnel Diversion

River Flow Below

Blue Mesa Elevation

Date

Flo

w R

ate

(cfs

)

Ele

vati

on

(fe

et)

Reservoir fills in late June.

Reserved BC Water Right 24-Hr Peak of

6400 cfs