Wind River Basin (April 2007)

• Current SNOTEL SWE is 70% of Average– Varies from 34 to 82%

• Normal – SWE about 14 inches– Meltout starts about April

15• Present

– SWE about 10 inches

• Runoff above Boysen– Average was 54% now

56%– Maximum was 71% of

Average now is 77%

Forecast Point PER MP MP% PER MP MP%-------------- ----- --- --- ----- --- ---WIND RIVER abv Bull Lake Cr APR-SEP 375 70 MAY-SEP 380 75WIND RIVER at Riverton APR-SEP 395 62 May-SEP 360 59BOYSEN RESERVOIR Inflow APR-SEP 435 54 MAY-SEP 425 56BULL LAKE CR near Lenore APR-SEP 127 70 May-SEP 117 66LT POPO AGIE RIVER nr Lander APR-SEP 33 62 MAY-SEP 34 69SF LT WIND nr Fort Washakie APR-SEP 60 71 MAY-SEP 62 77LT WIND RIVER nr Riverton APR-SEP 180 57 MAY-SEP 190 66

Wind River Basin (April 7th,2008)

• Currently SNOTELs are 97% – Varying from 88 to 111%

• Normal – SWE @ 14.3" – Meltout starts April 15

• Present – SWE @ 13.9“

• SWSI– SWSI @ -0.72

• Runoff above Boysen @ 4-1– Average is 96% – Maximum is 106%

Forecast Point PER MP MP% PER MP MP%--------------------------- ------- --- --- ------- --- ---WIND RIVER abv Bull Lake Cr APR-JUL 445 102 APR-SEP 550 103WIND RIVER at Riverton APR-JUL 535 98 APR-SEP 635 99BOYSEN RESERVOIR Inflow APR-JUL 685 96 APR-SEP 775 96BULL LAKE CR near Lenore APR-JUL 130 88 APR-SEP 160 88LT POPO AGIE RIVER nr Lander APR-JUL 41 89 APR-SEP 47 89SF LT WIND nr Fort Washakie APR-JUL 77 106 APR-SEP 86 102LT WIND RIVER nr Riverton APR-JUL 255 91 APR-SEP 285 91

Big Horn River Basin (April 2007)

• Current SNOTEL 75% of Average– Varies from 36 to 105%

• Normal – SWE about 13 inches– Meltout starts about April 15

• Present – SWE about 10 inches

• Runoff– Basin Average is 60% of

average– Maximum is 89% of

Average

Forecast Point PER MP MP% PER MP MP%-------------- ----- ---- --- ----- --- ---BOYSEN RESERVOIR Inflow APR-SEP 435 54 MAY-SEP 425 56GREYBULL RIVER nr Meeteetse APR-SEP 135 68 MAY-SEP 136 70SHELL CREEK nr Shell APR-SEP 64 89 MAY-SEP 59 86BIGHORN RIVER at Kane APR-SEP 670 60

Big Horn River Basin (April 7th, 2008)

• Currently SNOTELs are 100% – Varying from 73 to 196%

• Normal – SWE about 14.7 inches– Meltout starts @ April 15

• Present – SWE about 14.8 inches

• SWSI @ -0.27

• Runoff @ 4-1– Basin Average is 98%– Maximum is 105% – Minimum is 91%

Forecast Point PER MP MP% PER MP MP%-------------------------- ------- ---- --- ------- ---- ---BOYSEN RESERVOIR Inflow APR-JUL 685 96 APR-SEP 775 96GREYBULL RIVER nr Meeteetse APR-JUL 135 91 APR-SEP 183 92SHELL CREEK nr Shell APR-JUL 63 105 APR-SEP 75 104BIGHORN RIVER at Kane APR-SEP 980 98 APR-SEP 1090 98

Shoshone River Basin (April 2007)

• Current SNOTEL 64% of Average

– Varies from 27 to 85%• Normal

– SWE about 19.5 inches– Meltout starts about April 15

• Present – SWE about 12.7 inches

• Runoff– Basin Average is 77% of

average– Maximum is 86% of Average– Minimum is 59% of average

Forecast Point PER MP MP% PER MP MP%-------------- ----- --- --- ----- --- ---NF SHOSHONE RIVER at Wapiti APR-SEP 435 84 MAY-SEP 415 86SF SHOSHONE RIVER nr Valley APR-SEP 167 63 MAY-SEP 179 70SF SHOSHONE abv Buffalo Bill APR-SEP 145 64 MAY-SEP 126 59BUFFALO BILL DAM Inflow (2) APR-SEP 605 75 MAY-SEP 545 72CLARKS FORK RIVER nr Belfry APR-SEP 475 80 MAY-SEP 475 83

Shoshone River Basin (April 7th, 2008)

• Currently SNOTELs @ 99% – Varying from 73 to 113%

• Normal – SWE @ 18.8 "– Meltout starts about April 22

• Present– SWE @ 18.7"

• SWSI @ 3.22

• Runoff @ 4-1– Basin Average @ 118% – Maximum of 122% – Minimum of 108%

Forecast Point PER MP MP% PER MP MP%---------------------------- ------- --- --- ------- --- ---NF SHOSHONE RIVER at Wapiti APR-JUL 530 115 APR-SEP 600 115SF SHOSHONE RIVER nr Valley APR-JUL 250 111 APR-SEP 295 111SF SHOSHONE abv Buffalo Bill APR-JUL 245 114 APR-SEP 255 113BUFFALO BILL DAM Inflow (2) APR-JUL 790 110 APR-SEP 870 108CLARKS FORK RIVER nr Belfry APR-JUL 655 121 APR-SEP 725 122

Powder-Tongue River Basins (April 2007)

• Current SNOTEL 91% of Average

– Varies from 53 to 107%• Normal

– SWE about 11.5 inches– Meltout starts about April

15• Present

– SWE about 10.5 inches

• Runoff– Basin Average is 82% of

average– Maximum is 98% of

Average– Minimum is 72% of

average

Forecast Point PER MP MP% PER MP MP%-------------- ----- --- --- ----- --- ---TONGUE RIVER nr Dayton (2) APR-SEP 111 102 MAY-SEP 98 95BIG GOOSE nr Sheridan APR-SEP 60 100 MAY-SEP 55 95LITTLE GOOSE nr Bighorn APR-SEP 43 102 MAY-SEP 39 98TONGUE RIVER RESERVOIR Inflow APR-SEP 240 96 MAY-SEP 210 93MIDDLE FORK POWDER nr Barnum APR-SEP 13.6 73 NORTH FORK POWDER nr Hazelton APR-SEP 7.8 75 ROCK CREEK nr Buffalo APR-SEP 14.9 62PINEY CREEK at Kearney APR-SEP 39 72POWDER RIVER at Moorehead APR-SEP 145 63 MAY-SEP 143 72POWDER RIVER nr Locate APR-SEP 160 62

Powder-Tongue River Basins (April 7th, 2008)

• Currently SNOTELs @ 108% – Varying from 85 to 196%

• Normal – SWE @ 11.1"– Meltout starts about April 15

• Present– SWE @ 12"

• SWSI @ 2.20

• Runoff @ 4-1– Basin Average @ 108% – Maximum is 117% – Minimum is 102%

Forecast Point ER MP MP% PER MP MP%---------------------------- ------- ---- --- ------- ---- ---TONGUE RIVER nr Dayton (2) APR-JUL 100 104 APR-SEP 113 104BIG GOOSE nr Sheridan APR-JUL 55 106 APR-SEP 63 105LITTLE GOOSE nr Bighorn APR-JUL 35 103 APR-SEP 43 102TONGUE RIVER RESERVOIR Inflow APR-JUL 235 107 APR-SEP 260 104MIDDLE FORK POWDER nr Barnum APR-JUL 18.6 105 APR-SEP 19.4 104NORTH FORK POWDER nr Hazelton APR-JUL 11.2 117 APR-SEP 12 115ROCK CREEK nr Buffalo APR-JUL 23 116 APR-SEP 27 113PINEY CREEK at Kearney APR-JUL 57 116 APR-SEP 60 115POWDER RIVER at Moorehead APR-JUL 230 112 APR-SEP 260 113POWDER RIVER nr Locate APR-JUL 265 113 APR-SEP 300 115