US Bridges

S 210 over Mrl Spur (not in Use)

Fair

Missoula County, Montana · Bonner · Structure no. S00210000+02131

Built
1929
96 years old, rebuilt 1953
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete
Length
89 ft
3 main spans
Daily traffic
2,075
2023 count
Owner
State
State Highway Agency

About this bridge

S 210 over Mrl Spur (not in Use) is a concrete tee beam carrying S 210 over Mrl Spur (not in Use) in Missoula County, Montana. It was built in 1929 and reconstructed in 1953, so it is 96 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 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 2,075 vehicles a day, roughly 1% of them trucks, projected to reach 2,179 by 2043. The structure is 89 ft (27 m) long and 37 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesS 210
CrossesMrl Spur (not in Use)
LocationBonner
RouteState Highway 8133
CountyMissoula County
StateMontana
Coordinates46.86686, -113.8724
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length89 ft (27 m)
Longest span29 ft (8.8 m)
Deck width37 ft (11.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,075 (2023)
Projected traffic2,179 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed6.2 mi (10 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S 210 over Mrl Spur (not in Use) built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1953.

What condition is S 210 over Mrl Spur (not in Use) 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 April 2023.

How much traffic does S 210 over Mrl Spur (not in Use) carry?

About 2,075 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is S 210 over Mrl Spur (not in Use)?

The structure is 89 ft (27 m) long with a longest span of 29 ft (8.8 m) and a deck 37 ft wide.

Who owns S 210 over Mrl Spur (not in Use)?

It is owned by the State Highway Agency.