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Every bridge in Carbon County, Montana

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

81 inventoried bridges, busiest first

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

Carbon County, Montana, has 81 bridges in the 2025 National Bridge Inventory: 31 rated good, 46 fair, and 4 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
US 310 over Sand Creek	1987	4,907	Good
US 310 over Rock Creek	1934	4,561	Fair
US 212 over Rock Creek	1974	3,817	Fair
US 212 over Rock Creek	2001	2,491	Good
US 310 over Bridger Creek	1971	1,932	Fair
US 310 over Clarks Fk Yellowstone	1971	1,932	Fair
S 72 over Bear Creek	2013	1,732	Good
S 72 over Clarks Fork Yellowstone	2013	1,732	Fair
S 72 over Clarks Fork Yellowstone	2011	1,732	Fair
S 72 over Silver Tip Creek	2011	1,732	Good
S 72 over Clarks Fork Yellowstone	1970	1,507	Good
US 310 over RR	2001	1,504	Fair
S 308 over Rock Creek	2003	1,253	Good
US 212 Fh 59 over West Fork Rock Creek	1980	1,142	Good
E River St over Clarks Fk Yellowstne 053	2008	1,105	Good
S Main St over Rock Creek 046	1987	896	Fair
US 212 Fh 59 over Rock Creek	1965	721	Good
S 78 Fh 83 over East Rosebud Creek	1959	661	Fair
Secondary 78 over East Rosebud Creek	2019	661	Good
Boyd Cooney Dam Rd over Cooney Res Spillway 014	1982	593	Fair
Boyd Cooney Dam Rd over Red Lodge Creek 013	1991	593	Fair
Boyd Cooney Dam Rd over Rock Creek 027	1973	593	Fair
S 78 Fh 83 over Red Lodge Creek	1953	481	Poor
Cottonwood Rd over Clarks Fk Yellowstne 028	1997	416	Good
E Pryor Rd over Clarks Fk Yellowstne 056	1980	413	Fair
E Pryor Rd over Five Mile Creek 057	2016	413	Good
19TH Street over Rock Creek 059	2012	361	Good
E Bridger Rd over Clarks Fk Yellowstne 055	1980	260	Fair
Bridger Fromberg R over Bluewater Creek 001	1913	175	Fair
Joliet Fromberg Rd over Elbow Creek 035	1979	111	Fair
Bluewater Rd over Bluewater Creek 038	1915	100	Fair
Carbon Ave over Rock Creek 026	1982	100	Fair
Chance Rd over Clarks Fk Yellowstne 004	2004	100	Fair
Chance Rd over Clarks Fk Yellowstone	2024	100	Good
Cherry Springs Rd over Clear Creek 062	1942	100	Fair
Dutch Ln over Silvertip Creek 060	2006	100	Fair
East Side Road over Rock Creek	2023	100	Good
East Side Road over Rock Creek	2023	100	Good
Fox East Bench Rd over Rock Creek 025	2006	100	Fair
Golden Ln over Clarks Fk Yellowstne 008	1981	100	Fair
Homesteader Rd over Five Mile Creek 058	2018	100	Good
Leslie Rd over Elbow Creek 036	1913	100	Fair
Lone Tree Rd over Red Lodge Creek 045	1972	100	Fair
Lower River Rd over Bluewater Creek 002	1932	100	Fair
Luther Roscoe Road over Butcher Creek	2014	100	Fair
Meeteetse Trail over Rock Creek	2023	100	Good
Montaqua Rd over Elbow Creek 048	2007	100	Good
Montaqua Rd over Rock Creek 047	2014	100	Good
Pryor Mountain Roa over Bridger Creek	2020	100	Good
Red Lodge CR Rd over E Red Lodge Creek 010	1970	100	Fair
Red Lodge CR Rd over Red Lodge Creek 011	2017	100	Good
Red Lodge CR Rd over Red Lodge Creek 012	2005	100	Fair
Red Lodge CR Rd over Volney Creek 015	1991	100	Fair
Riverview Ln over Clarks Fk Yellowstne 007	1981	100	Fair
Shane Ridge Rd over Red Lodge Creek 044	2013	100	Good
Tuttle Ln over E Rosebud Creek 003	2009	100	Good
Two Mile Bridge Rd over Rock Creek 024	1982	100	Fair
Volney Creek Rd over Red Lodge Creek 042	1930	100	Fair
W Pryor Rd over Elbow Creek 037	1964	100	Poor
Willow Creek Rd over Willow Creek 061	1942	100	Poor
E Rosebud Rd over East Rosebud Creek 017	2010	76	Fair
E Rosebud Rd over East Rosebud Creek 018	1993	76	Fair
1-lane Road over Lake Fork Rock Creek	1952	50	Fair
1-lane Road over Main Fork Rock Creek	1952	50	Fair
1-lane Road over South Fork Spring Creek	1979	50	Fair
1-lane Road over West Fork Rock Creek	1956	50	Fair
1-lane Road over West Rosebud Creek	1959	50	Fair
2-lane Road over Rock Creek	1970	50	Poor
2-lane Road over West Fork Rock Creek	1965	50	Fair
No Data Entered over Ef Chicken Creek	2021	50	Good
No Data Entered over Lake Fork Rock Creek	1952	50	Fair
No Data Entered over Rock Creek	1954	50	Fair
No Data Entered over West Fork Rock Creek	1972	50	Fair
No Data Entered over East Rosebud Creek	2007	40	Good
No Data Entered over East Rosebud Creek	2007	40	Good
No Data Entered over Rock Creek Tributary	2010	40	Good
No Data Entered over West Fork Rock Creek	2010	40	Good
No Data Entered over Willow Creek	2010	40	Good
Gibson Rd over Rock Creek 029	1979	31	Fair
01017: Crooked Cre over Gypsum Creek	2010	25	Good
Access Road over Layout Creek	1983	23	Fair

Source: FHWA National Bridge Inventory, 2025.

Carbon County bridge conditions · Montana bridges by county.

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