US Bridges

US 36 W over Big Parsons CR

Fair

Linn County, Missouri · S 1 T 57 N R 22 W · Structure no. 958

Built
1967
58 years old, rebuilt 2007
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
385 ft
3 main spans
Daily traffic
6,409
2024 count
Owner
State
State Highway Agency

About this bridge

US 36 W over Big Parsons CR is a steel continuous stringer/multi-beam or girder carrying US 36 W over Big Parsons CR in Linn County, Missouri. It was built in 1967 and reconstructed in 2007, so it is 58 years old, older than the Missouri average of 45.1 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 6,409 vehicles a day, roughly 36% of them trucks, projected to reach 11,216 by 2044. The structure is 385 ft (117.3 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS 36 W
CrossesBig Parsons CR
LocationS 1 T 57 N R 22 W
RouteU.S. Route 36
CountyLinn County
StateMissouri
Coordinates39.77785, -93.32464
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+6 approach)
Design loadH 20
Structure length385 ft (117.3 m)
Longest span60 ft (18.3 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,409 (2024)
Projected traffic11,216 by 2044
Trucks36%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 US 36 W over Big Parsons CR built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2007.

What condition is US 36 W over Big Parsons CR 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 September 2024.

How much traffic does US 36 W over Big Parsons CR carry?

About 6,409 vehicles per day (2024 count), of which roughly 36% are trucks.

How long is US 36 W over Big Parsons CR?

The structure is 385 ft (117.3 m) long with a longest span of 60 ft (18.3 m) and a deck 35 ft wide.

Who owns US 36 W over Big Parsons CR?

It is owned by the State Highway Agency.