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Every bridge in Mineral County, Montana

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

153 inventoried bridges, busiest first

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

Mineral County, Montana, has 153 bridges in the 2025 National Bridge Inventory: 37 rated good, 99 fair, and 17 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
I 90 over Drainage	1986	8,111	Good
I 90 over Int Taft	1973	7,824	Fair
I 90 over Sep Local Road	1973	7,824	Fair
I 90 over Sep Local Road	1973	7,824	Fair
I 90 over Sep Randolph Creek Road	1973	7,824	Fair
I 90 over St. Regis River	1973	7,824	Fair
I 90 over Int Lozeau County Road	1967	7,649	Good
I 90 over Int Henderson	1980	7,448	Fair
I 90 over Int Saltese	1973	7,448	Fair
I 90 over St. Regis River	1973	7,448	Fair
I 90 over St. Regis Rvr-local Rd	1979	7,448	Fair
I 90 over St. Regis Rvr-local Rd	1979	7,448	Fair
I 90 over Int Cyr-clark Fork Rvr	1981	4,585	Fair
I 90 over Int Cyr-clark Fork Rvr	1965	4,585	Fair
I 90 over Local-rr	1981	4,585	Fair
I 90 over Local-rr	1964	4,585	Fair
I 90 over Clark Fork River	1981	4,088	Fair
I 90 over Clark Fork River	1965	4,088	Poor
I 90 over Int Tarkio County Road	1959	4,088	Fair
I 90 over Int Tarkio County Road	1959	4,088	Fair
I 90 over RR	1981	4,088	Fair
I 90 over RR	1965	4,088	Fair
I 90 over Sep Elizabeth Ln	1981	4,088	Good
I 90 over Sep Elizabeth Ln	1965	4,088	Poor
I 90 EB over Int Drexel	1980	4,056	Fair
I 90 EB over St. Regis River	1981	4,056	Fair
I 90 over Int Drexel	1980	4,056	Fair
I 90 over Int Two Mile-st Regis R	1981	4,056	Fair
I 90 over Int Two Mile-st Regis R	1981	4,056	Fair
I 90 over St. Regis River	1981	4,056	Fair
I 90 over St. Regis River	1981	4,056	Fair
I 90 over St. Regis River	1981	4,056	Fair
I 90 over St. Regis River	1981	4,056	Fair
I 90 over St. Regis River	1981	4,056	Good
I 90 EB over RR	1967	3,825	Fair
I 90 WB over RR	1967	3,825	Fair
I 90 over Cedar Creek	1966	3,825	Fair
I 90 over Cedar Creek	1960	3,825	Good
I 90 over Clark Fork River	1966	3,825	Fair
I 90 over Clark Fork River	1960	3,825	Fair
I 90 over Clark Fork River	1967	3,825	Fair
I 90 over Clark Fork River	1967	3,825	Fair
I 90 over Clark Fork River	1967	3,825	Fair
I 90 over Clark Fork River	1967	3,825	Fair
I 90 over Int Lozeau County Road	1967	3,825	Fair
I 90 over Int Superior	1960	3,825	Good
I 90 over Int Superior	1960	3,825	Good
I 90 EB over St. Regis River	1980	3,724	Fair
I 90 EB over St. Regis River	1980	3,724	Fair
I 90 over Int De Borgia	1976	3,724	Good
I 90 over Int De Borgia	1976	3,724	Good
I 90 over Int Haugan	1976	3,724	Fair
I 90 over Int Haugan	1976	3,724	Fair
I 90 over Clark Fork River	1982	3,719	Fair
I 90 over Clark Fork River	1984	3,719	Poor
I 90 over Clark Fork River	1960	3,719	Fair
I 90 over Int Dry Creek	1983	3,719	Fair
I 90 over Int Dry Creek	1983	3,719	Fair
I 90 EB over Clark Fork Rvr-local Rd	1982	3,559	Fair
I 90 EB over Sep Red Hill Road	1978	3,559	Fair
I 90 EB over Sep Southside Road	1984	3,559	Fair
I 90 EB over St. Regis River	1983	3,559	Fair
I 90 WB over Clark Fork Rvr-local Rd	1984	3,559	Fair
I 90 WB over Sep Red Hill Road	1978	3,559	Fair
I 90 WB over Sep Southside Road	1984	3,559	Fair
I 90 over Clark Fork Rvr-rr-local	1982	3,559	Fair
I 90 over Clark Fork Rvr-rr-local	1982	3,559	Fair
I 90 over Int Sloway	1978	3,559	Good
I 90 over Int Sloway	1978	3,559	Fair
I 90 over Int St. Regis	1983	3,559	Fair
I 90 over Int St. Regis	1983	3,559	Fair
I 90 over St. Regis River	1983	3,559	Fair
River St N over Clark Fork 003	1972	2,346	Fair
I 90 over St. Regis Rvr-int Ramp	1983	1,321	Fair
Diamond Match Rd over Cedar Creek	1955	743	Good
Diamond Match Rd over RR	1955	743	Fair
Railroad Ave over Int Alberton-i 90	1963	661	Good
I 90 over St. Regis Rvr-int Ramp	1983	625	Fair
Fish Creek Rd over Int Fish Creek-i 90 009	1965	356	Fair
Old Hwy 10 W over Clark Fork 054	1932	356	Poor
Rivulet Rd over Fish Creek 058	1986	356	Good
Upham Gulch Rd over Cedar Creek 051	2005	319	Good
Southside Crossing over Clark Fork 015	1982	299	Fair
Southside Rd over Dry Creek 002	1962	299	Good
Lozeau Crossovr Rd over Clark Fork 045	1944	221	Fair
S Frontage Rd W over Clark Fork 053	1916	174	Poor
Mullan Gulch Rd over Rock Creek 013	1931	150	Fair
Mullan Gulch Rd over Twelvemile Creek 014	1931	150	Fair
Old Hwy 10 E over Clark Fk-rr 060	1942	140	Fair
Old Hwy 10 E over St Regis River 059	1937	140	Poor
Big Creek Rd over St Regis River 019	1972	100	Fair
I 90 over Clark Fork River	1976	100	Fair
Lkout Pss Ski Area over Int Lkout Pass-i 90 004	1973	100	Good
Mullan Rd E over Nemote Creek 006	1931	100	Poor
Old Mill Loop over RR 056	1999	100	Fair
Packer Creek Rd over Packer Creek 008	1957	100	Fair
Packer Creek Rd over St Regis River 007	1957	100	Fair
Sloway Frntge Rd E over Abandoned RR 001	1956	100	Poor
Little Joe CR Rd over Sep I 90 005	1983	58	Good
Little Joe CR Rd over St Regis River 027	1965	58	Good
300-1 over St Regis River	1955	50	Fair
Fish CR Rd over S Fk Fish Creek	1965	50	Poor
Fish CR Rd over W Fk Fish Creek	1966	50	Poor
Montana Creek Road over South Fork Fish CR	1973	50	Fair
No Data Entered over Cedar CR	1935	50	Fair
No Data Entered over Deer CR	2004	50	Good
No Data Entered over North Fork Little Joe	2023	50	Good
No Data Entered over Packer Creek	1980	50	Good
No Data Entered over S Fk Fish Creek	1973	50	Poor
No Data Entered over Savenac Creek	2009	50	Good
No Data Entered over Sf Little Joe Creek	2020	50	Good
No Data Entered over Silver Creek	1984	50	Fair
No Data Entered over St Regis River	1963	50	Good
No Data Entered over St Regis River	1960	50	Good
No Data Entered over St Regis River	1940	50	Fair
No Data Entered over St Regis River	1900	50	Fair
No Data Entered over Trout Creek	1950	50	Fair
No Data Entered over Van Ness Creek	2019	50	Good
Rd 1181 over E Fk Big Creek	1954	50	Fair
Rd 18720 over Ward Creek	1972	50	Good
Rd 236 over Deer Creek	1991	50	Good
Rd 250 over Trout CR	1965	50	Fair
Rd 320 over Cedar CR	1959	50	Poor
Rd 342 over Dry CR	1959	50	Fair
Rd 343-2 over S Fk Fish Creek	1966	50	Poor
Rd 352 over Twelvemile Creek	1955	50	Fair
Rd 352 over Twelvemile Creek	1955	50	Poor
Rd 352 over Twelvemile Creek	1955	50	Poor
Rd 352 over Twelvemile Creek	1955	50	Fair
Rd 3822 over Big Creek	2019	50	Good
Rd 386 over St Regis River	1972	50	Fair
Rd 388 over Cedar CR	1954	50	Poor
Rd 388 over Hoodoo Creek	1957	50	Fair
Rd 431 over St Regis River	1957	50	Fair
Rd 450 over Trout CR	1967	50	Fair
Rd 450 over Windfall CR	1967	50	Fair
Rd 506 over St Regis River	1954	50	Fair
Rd 810 over St Regis River	1957	50	Fair
Rd 889 over Ward CR	1968	50	Good
Rd 889 over Ward Creek	1960	50	Fair
Rd 9117 over Twelvemile Creek	1963	50	Fair
Thompson CR Rd over S Fk Fish Creek	1999	50	Good
No Data Entered over Big Creek	1951	40	Fair
No Data Entered over Fish Creek	1967	40	Fair
No Data Entered over Flat Creek Creek	2004	40	Good
No Data Entered over Hair Ball	2004	40	Good
No Data Entered over Henderson Creek	1955	40	Poor
No Data Entered over Lower No Elk Creek	2004	40	Good
No Data Entered over No Elk Creek	2004	40	Good
No Data Entered over Randolf Creek	1991	40	Good
Rd 431 over Twomile Creek	1959	40	Fair
Surveyor Creek over Surveyor Creek	2015	40	Good
I 90 over St. Regis Rvr-int Ramp	1981	22	Fair

Source: FHWA National Bridge Inventory, 2025.

Mineral County bridge conditions · Montana bridges by county.

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