US Bridges

Boyd Branch RD over Big Spring Hollow

Good

Jefferson County, Missouri · S 36 T 39 N R 5 E · Structure no. 22392

Built
1986
39 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
175
2023 count
Owner
County
County Highway Agency

About this bridge

Boyd Branch RD over Big Spring Hollow is a concrete continuous culvert carrying Boyd Branch RD over Big Spring Hollow in Jefferson County, Missouri. It was built in 1986, so it is 39 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 175 vehicles a day, roughly 2% of them trucks, projected to reach 350 by 2043. The structure is 28 ft (8.5 m) long and 29 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesBoyd Branch RD
CrossesBig Spring Hollow
LocationS 36 T 39 N R 5 E
RouteCounty Highway 351
CountyJefferson County
StateMissouri
Coordinates38.05395, -90.43237
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length28 ft (8.5 m)
Longest span12 ft (3.7 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2023)
Projected traffic350 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Boyd Branch RD over Big Spring Hollow built?

It was built in 1986, making it 39 years old in 2025.

What condition is Boyd Branch RD over Big Spring Hollow 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 January 2025.

How much traffic does Boyd Branch RD over Big Spring Hollow carry?

About 175 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Boyd Branch RD over Big Spring Hollow?

The structure is 28 ft (8.5 m) long with a longest span of 12 ft (3.7 m) and a deck 29 ft wide.

Who owns Boyd Branch RD over Big Spring Hollow?

It is owned by the County Highway Agency.