Home › Montana › Rosebud County › All bridges

Every bridge in Rosebud County, Montana

Name: Every bridge in Rosebud County, Montana
Creator: Bridge Report Card
License: https://creativecommons.org/publicdomain/zero/1.0/

112 inventoried bridges, busiest first

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Rosebud County, Montana, has 112 bridges in the 2025 National Bridge Inventory: 18 rated good, 87 fair, and 7 poor (as of August 20, 2026).
This index lists every one of them, busiest first; each links to its own condition record.

Bridge	Built	Vehicles/day	Condition
Irr Bia Rte 6 over Lame Deer Creek	1976	3,000	Good
I 94 over Int East Forsyth	1977	2,749	Fair
I 94 over Int East Forsyth	1977	2,749	Fair
I 94 over Graveyard Creek	1962	2,636	Fair
I 94 over Graveyard Creek	1977	2,636	Fair
I 94 over Int W Rosebud 446-447	1970	2,636	Fair
I 94 over Int W Rosebud 446-447	1970	2,636	Fair
I 94 over Rosebud Creek	1970	2,636	Fair
I 94 over Rosebud Creek	1970	2,636	Fair
I 94 over Sep Frontage-old Hwy 10	1970	2,636	Fair
I 94 over Sep Frontage-old Hwy 10	1970	2,636	Fair
I 94 over Sep Wright Ln	1970	2,636	Fair
I 94 over Sweeney Creek-co Rd	1970	2,636	Fair
I 94 over Sweeney Creek-co Rd	1970	2,636	Fair
US 212 over Otter Creek	2013	2,593	Fair
I 94 EB over Smith Creek-sep Co Rd	1967	2,166	Good
I 94 WB over Smith Creek-sep Co Rd	1972	2,166	Fair
I 94 over Armells Cr-rr	1967	2,166	Good
I 94 over Armells Cr-rr	1972	2,166	Fair
Irr - US 212 over Tongue River	1949	2,126	Fair
I 94 EB over Int Reservation Cr-rd	1967	2,094	Fair
I 94 WB over Int Reservation Cr-rd	1973	2,094	Fair
I 94 over Sep Wright Ln	1970	2,094	Fair
S 59 over Dry House Creek	2007	1,258	Fair
Irr - S 39 over Rr-power Plant Road	1981	1,250	Fair
US 12 over Int West Forsyth I 94	1977	1,249	Fair
US 12 over RR	1977	1,249	Fair
Power Rd over RR 076	1982	948	Fair
Irr over Tongue River	1970	877	Fair
Irr - S 39 over Armells Creek	1983	833	Fair
Irr - S 39 over Int Colstrip I 94	1967	833	Fair
Irr - S 39 over RR	1983	833	Fair
Irr Bia Rte 4 over Tongue River	1970	800	Fair
Irr - S 39 over East Fork Armells Creek	1983	787	Fair
Irr - S 39 over RR	1983	787	Fair
Irr - S 39 over Sheep Creek	1982	787	Fair
US 12 over Yellowstone River	1958	722	Fair
Irr - S 39 over Rosebud Creek	2004	671	Good
Old Hwy 10 E over Smith Creek 053	1928	638	Fair
Pine Butte Drive over Armells Creek 077	1981	508	Fair
Old Hwy 10 over Rosebud Creek	2005	376	Fair
Old Hwy 10 E over Armells Creek 045	1932	352	Fair
Old Hwy 10 E over Drainage 052	1941	352	Fair
Old Hwy 10 over Reservation Creek 043	1936	273	Fair
Old Hwy 10 over Wyant Coulee 044	1932	273	Fair
S 446 over RR	1970	257	Fair
S 446 over Yellowstone River	1970	257	Fair
Irr Bia Rte 4 over Birney Creek	2007	250	Good
US 12 over Home Creek	2019	241	Good
US 12 over Muggins Creek	1947	241	Fair
US Hwy 12 over Musselshell River	2019	241	Good
US 12 over Anderson Creek	1940	222	Fair
US 12 over Drainage	1947	222	Fair
US 12 over Drainage	1947	222	Poor
US 12 over Drainage	1947	222	Fair
US 12 over Drainage	1941	222	Fair
US 12 over Drainage	1941	222	Fair
US 12 over Drainage	1941	222	Fair
US 12 over Drainage	1941	222	Poor
US 12 over Drainage	1940	222	Fair
US 12 over Dry Wash	1947	222	Fair
US 12 over Horse Creek	2012	222	Good
US 12 over Horse Creek	1940	222	Fair
US 12 over Big Porcupine Creek	2004	214	Good
US 12 over Big Porcupine Overflow	1988	214	Fair
US 12 over Drainage	1938	214	Poor
US 12 over Drainage	2012	214	Good
US 12 over Drainage	2012	214	Good
US 12 over Drainage	2012	214	Good
US 12 over East Spring Coulee	2012	214	Good
US 12 over Greasewood Creek	2012	214	Good
US 12 over Mcgraws Coulee	2012	214	Good
Lil Porcupine CR R over Little Porcupine CR 014	1978	190	Fair
Hammond Valley Rd over Big Porcupine CR 034	1977	142	Fair
Hammond Valley Rd over Greasewood Creek 033	1979	142	Fair
Cartersville Rd over Sand Creek 042	2012	139	Fair
Frontage Road 303 over Graveyard Creek 055	1928	128	Poor
Old Hwy 10 over Sweeney Creek 064	1930	128	Poor
Old US 10 over Butte Creek 041	2015	128	Fair
Old US 10 over Int E Rosebud I 94 003	1970	128	Fair
Acorn Flats Rd over Big Porcupine CR 005	2007	100	Good
Big Porcupine Rd over Big Porcupine CR 010	1992	100	Fair
Bridge Rd over Musselshell River 001	1930	100	Fair
Cartersville Rd over Little Porcupine CR 027	1970	100	Fair
County Road 105 over W Blacktail Creek 007	1940	100	Poor
Frontage Road 148 over Sep I 94 009	1970	100	Fair
Graveyard CR Rd over Int Hathway I 94 012	1977	100	Fair
Hirsch Rd - Rd 210 over Dirty Woman Creek	1970	100	Fair
Ingomar Rd over W Fk Froze to Death 006	1979	100	Fair
Irr - L44235 over Armells Creek	1967	100	Fair
Lee Creek Rd over Hanging Woman Creek 075	1981	100	Fair
Nnn Rd over Mcginnis Creek 004	1986	100	Fair
Petroleum Rd over Big Porcupine CR	2022	100	Good
Sand Creek Rd W over Sand Creek 029	1987	100	Fair
Sand Creek Rd over Cartersville Canal 030	1935	100	Fair
Sand Creek Rd over Sand Creek 031	1925	100	Fair
Schiffer Rd over Sep I 94 Schiffer Rd 013	1977	100	Fair
W Fk Amells CR Rd over Armells Creek 038	1981	100	Fair
Wendel Kincheloe R over Rattlesnake Creek 002	1950	100	Poor
S 332 over Tongue River	1963	64	Fair
S 447 over Rosebud Creek	1971	61	Fair
S 447 over Rosebud Creek Overflow	1971	61	Fair
S 566-tongue R Rd over Canyon Creek	1990	53	Fair
S 566-tongue R Rd over Hanging Woman Creek	1975	53	Fair
S 566-tongue R Rd over Tongue River	1980	53	Fair
S 566-tongue R Rd over Bridge Creek	2004	47	Good
Rosebud Creek Rd over Rosebud CR Ovrflow 046	1980	37	Fair
Rosebud Creek Rd over Rosebud Creek 047	1983	37	Fair
Rosebud Creek Rd over Rosebud Creek 048	1982	37	Fair
S 332 over Drainage	1986	29	Fair
Frontage Road 020 over Reservation Creek 036	1928	25	Fair
Big Porcupine Rd over Big Porcupine Creek 011	2006	17	Fair

Source: FHWA National Bridge Inventory, 2025.

Rosebud County bridge conditions · Montana bridges by county.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.