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<br />ar the Wyoming-South
<br />IOling. and 13,786 feet,
<br />The mean elevation of
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<br />'at have headwaters in
<br />Columbia River Basin,
<br />of the area of the state
<br />
<br />northwest corner in
<br />the backbone of the
<br />~ Great Divide Basin in
<br />Sierra Madre Range to
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<br />i lakes in Wyoming.
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<br />~ follows:
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<br />Yellowstone Park; major
<br />ters.
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<br />I Ind Beartooth ranges in
<br />Ilaries are the Lamar and
<br />I Clarks Fork of the
<br />
<br />I
<br />
<br />3. Big Horn River.
<br />The Big Horn River heads as the Wind River in the Wind River and
<br />Absaroka ranges and becomes the Big Horn River below Wind River
<br />Canyon where its tributaries drain the Absaroka, Owl Creek, and Big
<br />Horn mountains; major tributaries include the Wind, Po po Agie,
<br />Greybull, and Shoshone rivers, Ten Sleep, Paintrock and Shell creeks.
<br />4. Tongue River.
<br />This system drains the northeast end of the Big Horn Range; major
<br />tributaries are Big and Little Goose creeks and the Little Tongue River.
<br />5. Powder River.
<br />The Powder River System drains the Powder River Basin in north and
<br />central Wyoming and a part of the east slope of the Big Horn
<br />Mountains; major tributaries include the Little Powder River, Clear, and
<br />Crazy Woman creeks.
<br />6. Little Missouri River.
<br />The Little Missouri System drains the plains region north and west of
<br />the Black Hills.
<br />7. Belle Fourche River.
<br />This system drains the Black Hills and adjacent plains; major tributaries
<br />are Inyan Kara, Beaver, Sand, and Red Water creeks.
<br />8. Cheyenne River.
<br />This system drains the arid plains of east-central Wyoming; most
<br />tributaries are intermittent; a major tributary is Stockade-Beaver Creek,
<br />draining the south slope of the Black Hills.
<br />9. Niobrara River.
<br />The Niobrara River System also drains the plains of east-central
<br />Wyoming; most tributaries are intermittent; a major tributary is Van
<br />Tassel Creek.
<br />10. North Platte River.
<br />The North Platte River arises in Colorado, flows into Wyoming north to
<br />Casper, thence southeast to the Nebraska state line; major tributaries
<br />include the Encampment, Sweetwater, and Laramie rivers, with many
<br />small tributary creeks.
<br />11. South Platte River.
<br />This drainage system is represented by Lodgepole, Crow, Lonetree, and
<br />Dale creeks in extreme southeastern Wyoming.
<br />
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<br />B. Colorado River Basin.
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<br />12. Little Snake River.
<br />The#Little Snake River System drains the west slope of the Sierra Madre
<br />Range and adjacent plains; a major tributary is Savery Creek.
<br />
<br />13. Wyoming Basin.
<br />A closed basin in central Wyoming; Pickett Lake, a few springs, and
<br />Hays Reservoir are the only bodies of water of consequence.
<br />
<br />14. Green River.
<br />The Green River System arises in the Wind River Mountains and drains
<br />the Green River Basin; major tributaries include the Newfork River, Big
<br />Sandy Creek, Hams Fork, Blacks Fork and Henrys Fork.
<br />
<br />11
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