State-Tribal Compacts
13 formal agreements between Montana and 7 federally recognized tribal nations covering 2 policy domains.
Compacts
13
Tribal nations
7
Policy domains
2
Most recent
2025
Tribal nation
Blackfeet Nation
1 compact on file
- Water rightsEffective·Signed 2009 · Effective 2016
Montana–Blackfeet Nation Water Rights Compact
Quantifies the Blackfeet Nation's federal reserved water rights to the St. Mary, Milk, and Cut Bank river systems. Includes a Birch Creek Management Plan, federal infrastructure funding for the Blackfeet Irrigation Project, and a Tribal Water Code adopted in 2018.
MCA 85-20-1501Read compact
Tribal nation
Chippewa Cree Tribe of the Rocky Boy's Reservation
2 compacts on file
- Class III gamingEffective·Signed 2012 · Effective 2013
Montana–Chippewa Cree Tribe of the Rocky Boy's Reservation Class III Gaming Compact
Class III gaming compact authorizing up to 750 video gambling machines (500 at $10/$3,000 regular stakes, 250 at $10/$5,000 high stakes) at Northern Winz Casino.
IGRA 25 USC 2710(d) · MCA 23-5-1001Read compact - Water rightsEffective·Signed 1997 · Effective 1999
Montana–Chippewa Cree Tribe of the Rocky Boy's Reservation Water Rights Compact
Quantifies the Chippewa Cree Tribe's federal reserved water rights at the Rocky Boy's Indian Reservation, including a Tribal Water Code mechanism and Rocky Boy/North Central Montana Regional Water System development funding.
MCA 85-20-601Read compact
Tribal nation
Confederated Salish and Kootenai Tribes
2 compacts on file
- Class III gamingEffective·Signed 2025 · Effective 2026
Montana–Confederated Salish and Kootenai Tribes Class III Gaming Compact
Class III gaming compact (newly signed 2025; replaces 2006-lapsed prior compact). Authorizes up to 925 video gambling machines with regular ($10/$3,000) and high-stakes ($50/$5,000) tiers; includes sports wagering. Covers KwaTaqNuk Resort, Gray Wolf Peak Casino, and other CSKT facilities.
IGRA 25 USC 2710(d) · MCA 23-5-1001Read compact - Water rightsEffective·Signed 2015 · Effective 2020
Montana–Confederated Salish and Kootenai Tribes Water Rights Compact
Quantifies the CSKT's federal reserved water rights at the Flathead Reservation, plus on- and off-reservation rights including the Flathead River, Flathead Lake, and tributaries. The largest and most complex of the seven Montana tribal water compacts; settlement act includes federal infrastructure funding and resolution of the Flathead Indian Irrigation Project rights.
MCA 85-20-1901Read compact
Tribal nation
Crow Tribe of Indians
2 compacts on file
- Water rightsEffective·Signed 1999 · Effective 2010
Montana–Crow Tribe of Indians Water Rights Compact
Quantifies the Crow Tribe's federal reserved water rights to the Bighorn River and Yellowstone River. Includes a federally funded Crow Irrigation Project rehabilitation, Yellowtail Reservoir storage allocation, and a Crow Municipal, Rural, and Industrial Water System.
MCA 85-20-901Read compact - Class III gamingEffective·Signed 1998 · Effective 2014
Montana–Crow Tribe of Indians Class III Gaming Compact
Class III gaming compact (original 1998, currently operating under 8th Amendment, 2014; extended 15 years). Authorizes 925 machines split 2/3 regular stakes ($10/$3,000) and 1/3 high stakes ($50/$5,000) at Apsaalooke Nights Casino.
IGRA 25 USC 2710(d) · MCA 23-5-1001Read compact
Tribal nation
Fort Belknap Indian Community
2 compacts on file
- Water rightsAwaiting federal ratification·Signed 2001
Montana–Fort Belknap Indian Community Water Rights Compact
Quantifies the Gros Ventre and Assiniboine Tribes' federal reserved water rights at the Fort Belknap Reservation. State-ratified 2001; federal congressional ratification (the "Aaniiih Nakoda Settlement Act") remains pending.
MCA 85-20-1001Read compact - Class III gamingEffective·Signed 2007
Montana–Fort Belknap Indian Community (Gros Ventre and Assiniboine) Class III Gaming Compact
Class III gaming compact authorizing up to 400 video gambling machines with a $5 maximum wager and $2,000 maximum payout at Aaniiih Nakoda Casino.
IGRA 25 USC 2710(d) · MCA 23-5-1001Read compact
Tribal nation
Fort Peck Assiniboine and Sioux Tribes
2 compacts on file
- Class III gamingEffective·Signed 2023 · Effective 2024
Montana–Fort Peck Assiniboine and Sioux Tribes Class III Gaming Compact
Class III gaming compact (renewed 2023) authorizing up to 925 video gambling machines split 2/3 regular stakes ($10/$3,000) and 1/3 high stakes ($50/$5,000) at Silver Wolf Casino. Includes sports wagering authorization.
IGRA 25 USC 2710(d) · MCA 23-5-1001Read compact - Water rightsEffective·Signed 1985 · Effective 2020
Montana–Fort Peck Assiniboine and Sioux Tribes Water Rights Compact
Quantifies the Fort Peck Tribes' federal reserved water rights to the Missouri River and tributaries on and adjacent to the Fort Peck Reservation. The first Indian water compact negotiated by the Reserved Water Rights Compact Commission. Includes a Tribal Water Code mechanism and Tribal-State coordination provisions.
MCA 85-20-201Read compact
Tribal nation
Northern Cheyenne Tribe
2 compacts on file
- Class III gamingEffective·Signed 2013
Montana–Northern Cheyenne Tribe Class III Gaming Compact
Class III gaming compact authorizing up to 750 video gambling machines with $3,000 maximum payouts at Charging Horse Casino.
IGRA 25 USC 2710(d) · MCA 23-5-1001Read compact - Water rightsEffective·Signed 1991 · Effective 1992
Montana–Northern Cheyenne Tribe Water Rights Compact
Quantifies the Northern Cheyenne Tribe's federal reserved water rights to the Tongue River, Rosebud Creek, and other waters of the Northern Cheyenne Reservation. Includes a Tongue River Reservoir storage allocation and provisions for the Tongue River Dam rehabilitation.
MCA 85-20-301Read compact