US Bridges

Sunnen Lake RD over Branch of Allen CR

Good

Washington County, Missouri · S 22 T 37 N R 1 E · Structure no. 14361

Built
1922
103 years old
Condition
Good
inspected April 2024
Type
Tee Beam
Concrete
Length
27 ft
1 main span
Daily traffic
100
2024 count
Owner
County
County Highway Agency

About this bridge

Sunnen Lake RD over Branch of Allen CR is a concrete tee beam carrying Sunnen Lake RD over Branch of Allen CR in Washington County, Missouri. It was built in 1922, so it is 103 years old, older 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2044. The structure is 27 ft (8.2 m) long and 21 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSunnen Lake RD
CrossesBranch of Allen CR
LocationS 22 T 37 N R 1 E
RouteCounty Highway 65
Coordinates37.9147, -90.9185
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length27 ft (8.2 m)
Longest span25 ft (7.7 m)
Deck width21 ft (6.3 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic120 by 2044
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sunnen Lake RD over Branch of Allen CR built?

It was built in 1922, making it 103 years old in 2025.

What condition is Sunnen Lake RD over Branch of Allen CR 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 April 2024.

How much traffic does Sunnen Lake RD over Branch of Allen CR carry?

About 100 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Sunnen Lake RD over Branch of Allen CR?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.7 m) and a deck 21 ft wide.

Who owns Sunnen Lake RD over Branch of Allen CR?

It is owned by the County Highway Agency.