US Bridges

Buck Mountain RD over Doe Run CR

Fair

St. Francois County, Missouri · S 29 T 35 N R 5 E · Structure no. 36554

Built
2020
5 years old
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
35
2023 count
Owner
County
County Highway Agency

About this bridge

Buck Mountain RD over Doe Run CR is a prestressed concrete box beam or girders - multiple carrying Buck Mountain RD over Doe Run CR in St. Francois County, Missouri. It was built in 2020, so it is 5 years old, younger 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 53 by 2043. The structure is 65 ft (19.8 m) long and 24 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesBuck Mountain RD
CrossesDoe Run CR
LocationS 29 T 35 N R 5 E
RouteCounty Highway 176
CountySt. Francois County
StateMissouri
Coordinates37.71856, -90.49778
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.3 US tons
Inventory rating51.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span62 ft (18.8 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2023)
Projected traffic53 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Buck Mountain RD over Doe Run CR built?

It was built in 2020, making it 5 years old in 2025.

What condition is Buck Mountain RD over Doe Run 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 December 2024.

How much traffic does Buck Mountain RD over Doe Run CR carry?

About 35 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Buck Mountain RD over Doe Run CR?

The structure is 65 ft (19.8 m) long with a longest span of 62 ft (18.8 m) and a deck 24 ft wide.

Who owns Buck Mountain RD over Doe Run CR?

It is owned by the County Highway Agency.