US Bridges

Old HWY 87 over Fly Creek 090

Fair

Big Horn County, Montana · 15M W Hardin · Structure no. L02313006+08001

Built
2002
23 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
564
2023 count
Owner
State
State Highway Agency

About this bridge

Old HWY 87 over Fly Creek 090 is a prestressed concrete stringer/multi-beam or girder carrying Old HWY 87 over Fly Creek 090 in Big Horn County, Montana. It was built in 2002, so it is 23 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 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 564 vehicles a day, roughly 2% of them trucks, projected to reach 592 by 2043. The structure is 75 ft (23 m) long and 30 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesOld HWY 87
CrossesFly Creek 090
Location15M W Hardin
RouteState Highway 81016
StateMontana
Coordinates45.73322, -107.93209
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length75 ft (23 m)
Longest span75 ft (23 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic564 (2023)
Projected traffic592 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Old HWY 87 over Fly Creek 090 built?

It was built in 2002, making it 23 years old in 2025.

What condition is Old HWY 87 over Fly Creek 090 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 November 2023.

How much traffic does Old HWY 87 over Fly Creek 090 carry?

About 564 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Old HWY 87 over Fly Creek 090?

The structure is 75 ft (23 m) long with a longest span of 75 ft (23 m) and a deck 30 ft wide.

Who owns Old HWY 87 over Fly Creek 090?

It is owned by the State Highway Agency.