US Bridges

Boles RD over Dunne Spring CR

FairPosted for load

Franklin County, Missouri · S 27 T 44 N R 1 E · Structure no. 14521

Built
1928
97 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

Boles RD over Dunne Spring CR is a concrete continuous culvert carrying Boles RD over Dunne Spring CR in Franklin County, Missouri. It was built in 1928, so it is 97 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. Its operating status is: posted for load restriction.

It carries about 25 vehicles a day, roughly 25% of them trucks, projected to reach 45 by 2043. The structure is 25 ft (7.6 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesBoles RD
CrossesDunne Spring CR
LocationS 27 T 44 N R 1 E
RouteCounty Highway 69
CountyFranklin County
StateMissouri
Coordinates38.53122, -90.89089
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length25 ft (7.6 m)
Longest span10 ft (3 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic45 by 2043
Trucks25%
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 Boles RD over Dunne Spring CR built?

It was built in 1928, making it 97 years old in 2025.

What condition is Boles RD over Dunne Spring 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 January 2025.

How much traffic does Boles RD over Dunne Spring CR carry?

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

How long is Boles RD over Dunne Spring CR?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m) and a deck 25 ft wide.

Who owns Boles RD over Dunne Spring CR?

It is owned by the County Highway Agency.