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Every bridge in Stillwater County, Montana

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

92 inventoried bridges, busiest first

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

Stillwater County, Montana, has 92 bridges in the 2025 National Bridge Inventory: 28 rated good, 63 fair, and 1 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 Cove Irrigation Ditch	1970	12,321	Good
I 90 over Int Exit 396	1963	10,845	Fair
I 90 over Int Park City	1967	7,580	Fair
I 90 over Int Park City	1967	7,580	Fair
I 90 over Sep Pope Road	1967	7,580	Fair
I 90 over Sep Pope Road	1967	7,580	Fair
I 90 over Big Ditch	1970	6,161	Fair
I 90 over Big Ditch	1970	6,161	Fair
I 90 over Hensley Cr-hensley CR Rd	1970	6,161	Fair
I 90 over Hensley Cr-hensley CR Rd	1970	6,161	Fair
I 90 over Int Columbus-9th St N	1971	6,161	Fair
I 90 over Int Columbus-9th St N	1971	6,161	Fair
I 90 over Pine Crest Road	1970	6,161	Fair
I 90 over Pine Crest Road	1970	6,161	Fair
I 90 over Ronan Ranch Road	1970	6,161	Fair
I 90 over Ronan Ranch Road	1970	6,161	Fair
I 90 over Sep Valley Creek Road	1970	6,161	Fair
I 90 over Sep Valley Creek Road	1970	6,161	Fair
I 90 over Sep Yegens County Road	1970	6,161	Fair
I 90 over Sep Yegens County Road	1970	6,161	Fair
I 90 over Sep Youngs Point Road	1970	6,161	Good
I 90 over Sep Youngs Point Road	1970	6,161	Fair
I 90 over Valley Creek	1970	6,161	Fair
I 90 over Valley Creek	1970	6,161	Fair
I 90 over Berry Creek	1971	5,861	Good
I 90 over Int Springtime	1971	5,861	Fair
I 90 over Int Springtime	1971	5,861	Fair
I 90 over Keyser Creek	1971	5,861	Fair
I 90 over Keyser Creek	1971	5,861	Fair
I 90 over Berry Creek	1963	5,423	Good
I 90 over Int Reed Point	1963	5,423	Fair
I 90 over Int Reed Point	1963	5,423	Good
I 90 over RR	1962	5,423	Fair
I 90 over RR	1976	5,423	Fair
I 90 over Yellowstone River	1961	5,423	Fair
I 90 over Yellowstone River	1976	5,423	Fair
S 78 over Yellowstone River	1957	5,017	Poor
S 78 over Shane Creek	2007	3,144	Fair
S 78 over Beaver Creek	2010	2,376	Good
S 78 over Joe Hill Creek	2007	2,376	Good
S 78 over Whitebird Creek	2007	2,376	Fair
S 78 over Butcher Creek	2010	1,898	Good
Old US 10 over Allen Creek 016	1928	1,617	Fair
Old US 10 over Big Ditch 017	1955	1,617	Good
Old US 10 over Brown Creek 013	1935	1,617	Fair
Old US 10 over Cove Ditch 015	1928	1,617	Fair
Old US 10 over Hensley Creek 014	1928	1,617	Fair
Old US 10 over Valley Creek 019	1928	1,617	Fair
Hwy 10 over Keyser Creek	2004	1,280	Fair
Nye Rd-s 419 over E Rosebud Creek Overflow	1992	1,074	Fair
Nye Rd-s 419 over East Rosebud Creek	1992	1,074	Fair
Nye Rd-s 419 over W Rosebud Creek Overflow	1991	1,074	Good
Nye Rd-s 419 over Fishtail Creek	1994	1,061	Good
Nye Rd-s 419 over West Rosebud Creek	1991	1,061	Fair
Old US 10 over Big Ditch 010	1928	828	Fair
Old US 10 over Cove Ditch 011	1928	828	Fair
Old US 10 over Cove Ditch 012	1928	828	Fair
Nye Rd-s 419 over Stillwater River	1945	598	Fair
Stillwater Riv Rd over W Fork Stillwater River	2003	598	Good
Stillwater Riv Rd over W Fork Stillwater River	2003	598	Good
W Grove St over Rosebud Creek	1989	507	Good
Rapelje Rd over Keyser Creek	1976	453	Fair
Rapelje Rd over Sep Rapelje-i 90	1971	453	Fair
Whitebird CR Rd over Whitebird Creek 049	1998	263	Fair
Johnson Bridge Rd over Stillwater River	2021	201	Good
Reed Point Rd over Yellowstone River 004	2000	175	Fair
1ST St NW over Big Ditch 005	1935	100	Fair
Cemetery Rd over Valley Creek 039	1940	100	Fair
Centennial Rd over Keyser Creek 043	2005	100	Good
Columbus-molt Rd over Sep Columbus-molt Rd I 9	1970	100	Fair
Countryman CR Rd over Countryman Creek 050	1996	100	Good
Countryman CR Rd over Stillwater R Ovflow 002	2006	100	Fair
Countryman CR Rd over Stillwater River 003	1988	100	Fair
Frontage Road 120 over Valley Creek 048	1969	100	Fair
Grove Creek Rd over Fishtail Creek 038	2004	100	Good
Ingersoll Creek Ro over W Rosebud Creek	2019	100	Good
N Stillwater Rd over Stillwater River 021	2001	100	Good
Nitche Rd over Rosebud Creek 029	2003	100	Fair
Old US 10 over Berry Creek 024	1931	100	Fair
Old US 10 over Coulee Creek 023	1931	100	Fair
Rosebud Cemetery R over Butcher Creek 030	2013	100	Good
Sleepy Hollow Rd over W Rosebud Creek 032	2004	100	Good
Spring Creek Rd over Stillwater River 036	2018	100	Good
Stillwater Riv Rd over Stillwater River 026	2009	100	Good
Valley Creek Rd over Valley Creek 008	2010	100	Fair
Valley Creek Rd over Valley Creek 009	2008	100	Good
W Fork Rd over Limestone Creek 051	2004	100	Good
W Rosebud Rd over W Rosebud Creek 033	2004	100	Good
W Rosebud Rd over W Rosebud Creek 034	2017	100	Good
Youngs Point Rd over Big Ditch 044	2004	100	Fair
Woodbine Campgrd over Stillwater River	1962	99	Fair
1-lane Road over West Rosebud Creek	1965	50	Fair

Source: FHWA National Bridge Inventory, 2025.

Stillwater County bridge conditions · Montana bridges by county.

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