Sweet Grass County, MT
89 public highway bridges
Sweet Grass County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Sweet Grass County, Montana contains 89 public highway bridges. Roughly 21.3% are rated “Good,” 49.4% “Fair,” and 5.6% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Condition Distribution
All Bridges (89)
I 90
UnknownOver: INT SPRINGDALE
SPRINGDALE, Sweet Grass, MT
I 90
UnknownOver: INT SPRINGDALE
SPRINGDALE, Sweet Grass, MT
I 90
UnknownOver: JARRETT CR FARM ACCESS
3.1M E SPRINGDALE, Sweet Grass, MT
I 90
UnknownOver: SEP COUNTY ROAD
5M W BIG TIMBER, Sweet Grass, MT
I 90
UnknownOver: SEP COUNTY ROAD
5M W BIG TIMBER, Sweet Grass, MT
I 90
UnknownOver: INT WEST BIG TIMBER
1.2M W BIG TIMBER, Sweet Grass, MT
I 90
UnknownOver: INT WEST BIG TIMBER
1.2M W BIG TIMBER, Sweet Grass, MT
I 90
UnknownOver: INT GREYCLIFF
GREYCLIFF, Sweet Grass, MT
I 90
UnknownOver: INT GREYCLIFF
GREYCLIFF, Sweet Grass, MT
I 90
UnknownOver: GREYCLIFF CREEK RD
3.7M E GREYCLIFF, Sweet Grass, MT
I 90
UnknownOver: GREYCLIFF CREEK RD
3.7M E GREYCLIFF, Sweet Grass, MT
I 90
UnknownOver: INT BRIDGER CREEK
6.2M E GREYCLIFF, Sweet Grass, MT
I 90
UnknownOver: INT BRIDGER CREEK
6.2M E GREYCLIFF, Sweet Grass, MT
I 90
UnknownOver: SEP WORK CREEK ROAD
3.1M W REED POINT, Sweet Grass, MT
I 90
UnknownOver: SEP WORK CREEK ROAD
3.1M W REED POINT, Sweet Grass, MT
I 90
UnknownOver: SEP HUMP CREEK ROAD
1.2M W REED POINT, Sweet Grass, MT
I 90
UnknownOver: SEP HUMP CREEK ROAD
1.2M W REED POINT, Sweet Grass, MT
OLD BOULDER RD
UnknownOver: SEP I 90 008
1M E BIG TIMBER, Sweet Grass, MT
DEHART TRAIL
UnknownOver: INT DEHART I 90 007
7M SW BIG TIMBER, Sweet Grass, MT
S 91
UnknownOver: INT EAST BIG TIMBER I 90
2M E BIG TIMBER, Sweet Grass, MT
MAIN BOULDER RD
UnknownOver: SEP I 90
BIG TIMBER, Sweet Grass, MT
TERLAND RD
FairOver: BRIDGER CREEK 053
5M SE GREYCLIFF, Sweet Grass, MT
HOWIE RD
FairOver: BIG TIMBER CREEK
1M NE BIG TIMBER, Sweet Grass, MT
MELVILLE RD
FairOver: SWEET GRASS CREEK 01
W MELVILLE, Sweet Grass, MT
BOULDER RD
FairOver: BOULDER RIVER 002
19M S MCLEOD, Sweet Grass, MT
E BOULDER RD
FairOver: E BOULDER RIVER 034
6M S MCLEOD, Sweet Grass, MT
E BOULDER RD
FairOver: E BOULDER RIVER 032
4M S MCLEOD, Sweet Grass, MT
E BOULDER RD
FairOver: E BOULDER RIVER 033
5M S MCLEOD, Sweet Grass, MT
LOWER SWEET GRASS
FairOver: YELLOWSTONE RIVER 038
SE GREYCLIFF, Sweet Grass, MT
OLD US 10
FairOver: PUMP CREEK 042
2.5M W REED POINT, Sweet Grass, MT
E BOULDER RD
FairOver: E BOULDER RIVER 031
3M S MCLEOD, Sweet Grass, MT
OLD US 10
FairOver: LOWER DEER CREEK 006
2M NW GREYCLIFF, Sweet Grass, MT
US 191
FairOver: CAYUSE CREEK
1M NE MELVILLE, Sweet Grass, MT
I 90
FairOver: JARRETT CR FARM ACCESS
3.1M E SPRINGDALE, Sweet Grass, MT
I 90
FairOver: BRIDGER CREEK
6.8M E GREYCLIFF, Sweet Grass, MT
US 191
FairOver: SWEET GRASS CREEK
2M S MELVILLE, Sweet Grass, MT
MAIN BOULDER RD
FairOver: BOULDER RIVER
8M S BIG TIMBER, Sweet Grass, MT
MAIN BOULDER RD
FairOver: WEST BOULDER RIVER
MCLEOD, Sweet Grass, MT
I 90
FairOver: CNTY RD 113-FRYER CREEK
4.3M E SPRINGDALE, Sweet Grass, MT
WORK CREEK RD
FairOver: WORK CREEK 050
9M SE GREYCLIFF, Sweet Grass, MT
OLD US 10
FairOver: BRIDGER CREEK 040
6M SE GREYCLIFF, Sweet Grass, MT
S 91
FairOver: BOULDER RIVER
BIG TIMBER, Sweet Grass, MT
MAIN BOULDER RD
FairOver: BOULDER RIVER
3M NE MCLEOD, Sweet Grass, MT
1-LANE ROAD
FairOver: W.FORK STILLWATER RIVER
NO DATA ENTERED, Sweet Grass, MT
OLD US 10
FairOver: WORK CREEK 041
4M W REED POINT, Sweet Grass, MT
US 191
FairOver: YELLOWSTONE RIVER
1M N BIG TIMBER, Sweet Grass, MT
I 90
FairOver: BOULDER RIVER
BIG TIMBER, Sweet Grass, MT
I 90
FairOver: BOULDER RIVER
BIG TIMBER, Sweet Grass, MT
N YELLOWSTONE TRL
FairOver: YELLOWSTONE RIVER 010
6M SW BIG TIMBER, Sweet Grass, MT
I 90
FairOver: BRIDGER CREEK
6.8M E GREYCLIFF, Sweet Grass, MT
Read our methodology - how this data is sourced, computed, and verified.
Related
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.