Answer: sdak

AnswerCrossword Clue
SDAKCheyenne R. state
SDAKNeighbor of Neb.
SDAKPierre's home: Abbr.
SDAKIt's nearly bisected by the Missouri R.
SDAKPierre is its cap.
SDAKWounded Knee's st.
SDAKIts lic. plate reads "Great faces. Great places."
SDAKWhere T. Rex Sue was found
SDAKBadlands Natl. Park site
SDAKBelle Fourche, in this state, is about 20 mi. south of the U.S.'s geographic center
SDAKMount Rushmore's state: Abbr.
SDAKMinn. neighbor
SDAKWyo. neighbor
SDAKNebr. neighbor
SDAKBlack Hills st.
SDAKNeighbor of Mont.
SDAKBadlands st.
SDAKMt. Rushmore's loc.
SDAKNebraska neighbor (abbr.)
SDAKPierre's state (abbr.)
SDAKLake Oahe locale: Abbr.
SDAKCoyote state (abbr.)
SDAKWhere to find Pierre: abbr.
SDAKIt's above Neb.
SDAKNeighbor of Minn.
SDAK"Deadwood" setting: Abbr.
SDAKCrazy Horse Memorial loc.
SDAKRapid City's st.
SDAKWhere T. rex Sue was found
SDAKNorth of Neb.
SDAKPart of the USA
SDAKPierre's st.
SDAKMount Rushmore state (abbr.)
SDAKMt. Rushmore state
SDAKNeb. neighbor
SDAKMont. neighbor
SDAKMt. Rushmore's state
SDAKSt. since 11-2-1889
SDAK...of this st.
SDAKMount Rushmore site: Abbr.