US Bridges

County RD 177 over Br of Prairie Fk

Fair

Callaway County, Missouri · S 2 T 47 N R 7 W · Structure no. 24472

Built
1912
113 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 177 over Br of Prairie Fk is a steel stringer/multi-beam or girder carrying County RD 177 over Br of Prairie Fk in Callaway County, Missouri. It was built in 1912, so it is 113 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 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 30 vehicles a day, roughly 5% of them trucks, projected to reach 45 by 2043. The structure is 35 ft (10.7 m) long and 16 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCounty RD 177
CrossesBr of Prairie Fk
LocationS 2 T 47 N R 7 W
RouteCounty Highway 497
CountyCallaway County
StateMissouri
Coordinates38.86564, -91.66767
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.7 US tons
Inventory rating20.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length35 ft (10.7 m)
Longest span32 ft (9.8 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2043
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 County RD 177 over Br of Prairie Fk built?

It was built in 1912, making it 113 years old in 2025.

What condition is County RD 177 over Br of Prairie Fk 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 2024.

How much traffic does County RD 177 over Br of Prairie Fk carry?

About 30 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is County RD 177 over Br of Prairie Fk?

The structure is 35 ft (10.7 m) long with a longest span of 32 ft (9.8 m) and a deck 16 ft wide.

Who owns County RD 177 over Br of Prairie Fk?

It is owned by the County Highway Agency.