US Bridges

Boles RD over Dunn Spring CR

Poor

Franklin County, Missouri · S 26 T 44 N R 1 E · Structure no. 14514

Built
1999
26 years old
Condition
Poor
inspected January 2025
Type
Culvert
Steel
Length
40 ft
1 main span
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

Boles RD over Dunn Spring CR is a steel culvert carrying Boles RD over Dunn Spring CR in Franklin County, Missouri. It was built in 1999, so it is 26 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 25 vehicles a day, roughly 8% of them trucks, projected to reach 45 by 2043. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesBoles RD
CrossesDunn Spring CR
LocationS 26 T 44 N R 1 E
RouteCounty Highway 69
CountyFranklin County
StateMissouri
Coordinates38.53881, -90.88587
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadOther
Structure length40 ft (12.2 m)
Longest span38 ft (11.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic45 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$153,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Boles RD over Dunn Spring CR built?

It was built in 1999, making it 26 years old in 2025.

What condition is Boles RD over Dunn Spring CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.

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

About 25 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Boles RD over Dunn Spring CR?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.6 m).

Who owns Boles RD over Dunn Spring CR?

It is owned by the County Highway Agency.