US Bridges

Grand Ave over Forest Park Pkwy

FairPosted for load

St. Louis city, Missouri · S 16 T 45 N R 7 E · Structure no. 13484

Built
1961
64 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
57 ft
1 main span
Daily traffic
34,100
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Grand Ave over Forest Park Pkwy is a concrete continuous slab carrying Grand Ave over Forest Park Pkwy in St. Louis city, Missouri. It was built in 1961, so it is 64 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 34,100 vehicles a day, roughly 5% of them trucks, projected to reach 46,035 by 2043. The structure is 57 ft (17.4 m) long and 80 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesGrand Ave
CrossesForest Park Pkwy
LocationS 16 T 45 N R 7 E
RouteCity Street 0
CountySt. Louis city
StateMissouri
Coordinates38.63316, -90.2342
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length57 ft (17.4 m)
Longest span56 ft (17.1 m)
Deck width80 ft (24.4 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,100 (2023)
Projected traffic46,035 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Grand Ave over Forest Park Pkwy built?

It was built in 1961, making it 64 years old in 2025.

What condition is Grand Ave over Forest Park Pkwy 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 March 2023.

How much traffic does Grand Ave over Forest Park Pkwy carry?

About 34,100 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Grand Ave over Forest Park Pkwy?

The structure is 57 ft (17.4 m) long with a longest span of 56 ft (17.1 m) and a deck 80 ft wide.

Who owns Grand Ave over Forest Park Pkwy?

It is owned by the City or Municipal Highway Agency.