US Bridges

Granite Creek RD over Big Cherry Creek 119

Fair

Lincoln County, Montana · 5M SW Libby · Structure no. L27207000+09001

Built
1977
48 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
100 ft
1 main span
Daily traffic
334
2023 count
Owner
County
County Highway Agency

About this bridge

Granite Creek RD over Big Cherry Creek 119 is a prestressed concrete tee beam carrying Granite Creek RD over Big Cherry Creek 119 in Lincoln County, Montana. It was built in 1977, so it is 48 years old, older 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 334 vehicles a day, roughly 3% of them trucks, projected to reach 357 by 2043. The structure is 100 ft (30.5 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesGranite Creek RD
CrossesBig Cherry Creek 119
Location5M SW Libby
RouteCounty Highway 27207
StateMontana
Coordinates48.32747, -115.52914
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating23.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span99 ft (30.2 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic334 (2023)
Projected traffic357 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Granite Creek RD over Big Cherry Creek 119 built?

It was built in 1977, making it 48 years old in 2025.

What condition is Granite Creek RD over Big Cherry Creek 119 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 October 2024.

How much traffic does Granite Creek RD over Big Cherry Creek 119 carry?

About 334 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Granite Creek RD over Big Cherry Creek 119?

The structure is 100 ft (30.5 m) long with a longest span of 99 ft (30.2 m) and a deck 27 ft wide.

Who owns Granite Creek RD over Big Cherry Creek 119?

It is owned by the County Highway Agency.