The Sixth principal meridian at 97ð22â²08â³W extends from the baseline coincident with the north boundary of Kansas in latitude 40ðN south through the state to its south boundary in latitude 37ðN and north through Nebraska to the Missouri River and governs the surveys in Kansas and Nebraska; the surveys in Wyoming except those referred to the Wind River meridian and base line, which intersect in latitude 43ð01â²20â³N and longitude 108ð48â²40â³W from Greenwich; the surveys in Colorado except those projected from the New Mexico and Ute meridians the latter intersecting its baseline in latitude 39ð06â²40â³N and longitude 108ð33â²20â³W from Greenwich; and the surveys in South Dakota extended or to be extended over the tract embracing the Pine Ridge and Rosebud Indian Reservations.