US Bridges

NW 308th ST over Mcguire Br

Good

Clinton County, Missouri · S 24 T 56 N R 33 W · Structure no. 22431

Built
1997
28 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
56 ft
1 main span
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

NW 308th ST over Mcguire Br is a steel stringer/multi-beam or girder carrying NW 308th ST over Mcguire Br in Clinton County, Missouri. It was built in 1997, so it is 28 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25 vehicles a day, roughly 10% of them trucks, projected to reach 29 by 2043. The structure is 56 ft (17.1 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNW 308th ST
CrossesMcguire Br
LocationS 24 T 56 N R 33 W
RouteCounty Highway 355
Coordinates39.65276, -94.54614
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.7 US tons
Inventory rating22.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length56 ft (17.1 m)
Longest span54 ft (16.5 m)
Deck width25 ft (7.7 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic29 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 NW 308th ST over Mcguire Br built?

It was built in 1997, making it 28 years old in 2025.

What condition is NW 308th ST over Mcguire Br in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does NW 308th ST over Mcguire Br carry?

About 25 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NW 308th ST over Mcguire Br?

The structure is 56 ft (17.1 m) long with a longest span of 54 ft (16.5 m) and a deck 25 ft wide.

Who owns NW 308th ST over Mcguire Br?

It is owned by the County Highway Agency.