US Bridges

Laguna Palma RD over Boyd Branch

Good

Jefferson County, Missouri · S 25 T 39 N R 5 E · Structure no. 37018

Built
2023
2 years old
Condition
Good
inspected January 2025
Type
Tee Beam
Prestressed Concrete
Length
105 ft
1 main span
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

Laguna Palma RD over Boyd Branch is a prestressed concrete tee beam carrying Laguna Palma RD over Boyd Branch in Jefferson County, Missouri. It was built in 2023, so it is 2 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 200 vehicles a day, roughly 2% of them trucks, projected to reach 400 by 2043. The structure is 105 ft (32 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesLaguna Palma RD
CrossesBoyd Branch
LocationS 25 T 39 N R 5 E
RouteCounty Highway 354
CountyJefferson County
StateMissouri
Coordinates38.05968, -90.42417
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length105 ft (32 m)
Longest span100 ft (30.5 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic400 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Laguna Palma RD over Boyd Branch built?

It was built in 2023, making it 2 years old in 2025.

What condition is Laguna Palma RD over Boyd Branch 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 Laguna Palma RD over Boyd Branch carry?

About 200 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Laguna Palma RD over Boyd Branch?

The structure is 105 ft (32 m) long with a longest span of 100 ft (30.5 m) and a deck 29 ft wide.

Who owns Laguna Palma RD over Boyd Branch?

It is owned by the County Highway Agency.