US Bridges

9th Ave SW over Lone Tree Creek 083

Fair

Richland County, Montana · SIDNEY-9th Ave SW · Structure no. M42104000+00101

Built
1999
26 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
123 ft
3 main spans
Daily traffic
1,494
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

9th Ave SW over Lone Tree Creek 083 is a concrete continuous slab carrying 9th Ave SW over Lone Tree Creek 083 in Richland County, Montana. It was built in 1999, so it is 26 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.

It carries about 1,494 vehicles a day, projected to reach 1,591 by 2043. The structure is 123 ft (37.6 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries9th Ave SW
CrossesLone Tree Creek 083
LocationSIDNEY-9th Ave SW
RouteCity Street 10411
CountyRichland County
StateMontana
Coordinates47.70799, -104.16789
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length123 ft (37.6 m)
Longest span32 ft (9.9 m)
Deck width48 ft (14.6 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,494 (2023)
Projected traffic1,591 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 9th Ave SW over Lone Tree Creek 083 built?

It was built in 1999, making it 26 years old in 2025.

What condition is 9th Ave SW over Lone Tree Creek 083 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 2023.

How much traffic does 9th Ave SW over Lone Tree Creek 083 carry?

About 1,494 vehicles per day (2023 count).

How long is 9th Ave SW over Lone Tree Creek 083?

The structure is 123 ft (37.6 m) long with a longest span of 32 ft (9.9 m) and a deck 48 ft wide.

Who owns 9th Ave SW over Lone Tree Creek 083?

It is owned by the City or Municipal Highway Agency.