US Bridges

Little Bear RD over Big Bear Creek 118

FairPosted for load

Gallatin County, Montana · 4M S Gallatin Gateway · Structure no. L16818001+09001

Built
1987
38 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
29 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Little Bear RD over Big Bear Creek 118 is a wood or timber stringer/multi-beam or girder carrying Little Bear RD over Big Bear Creek 118 in Gallatin County, Montana. It was built in 1987, so it is 38 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 29 ft (8.9 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesLittle Bear RD
CrossesBig Bear Creek 118
Location4M S Gallatin Gateway
RouteCounty Highway 16818
StateMontana
Coordinates45.54603, -111.16999
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating28 US tons
Inventory rating19 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length29 ft (8.9 m)
Longest span28 ft (8.4 m)
Deck width29 ft (8.8 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Little Bear RD over Big Bear Creek 118 built?

It was built in 1987, making it 38 years old in 2025.

What condition is Little Bear RD over Big Bear Creek 118 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does Little Bear RD over Big Bear Creek 118 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Little Bear RD over Big Bear Creek 118?

The structure is 29 ft (8.9 m) long with a longest span of 28 ft (8.4 m) and a deck 29 ft wide.

Who owns Little Bear RD over Big Bear Creek 118?

It is owned by the County Highway Agency.