US Bridges

Grand DR over Forest Park Pkwy

PoorPosted for load

St. Louis city, Missouri · S 18 T 45 N R 7 E · Structure no. 13485

Built
1961
64 years old
Condition
Poor
inspected April 2024
Type
Slab
Concrete Continuous
Length
65 ft
1 main span
Daily traffic
3,500
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Grand DR over Forest Park Pkwy is a concrete continuous slab carrying Grand DR 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 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. Its operating status is: posted for load restriction.

It carries about 3,500 vehicles a day, roughly 2% of them trucks, projected to reach 4,725 by 2043. The structure is 65 ft (19.9 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 DR
CrossesForest Park Pkwy
LocationS 18 T 45 N R 7 E
RouteCity Street 0
CountySt. Louis city
StateMissouri
Coordinates38.64307, -90.27002
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length65 ft (19.9 m)
Longest span64 ft (19.5 m)
Deck width80 ft (24.4 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2023)
Projected traffic4,725 by 2043
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Grand DR over Forest Park Pkwy built?

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

What condition is Grand DR over Forest Park Pkwy 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 April 2024.

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

About 3,500 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Grand DR over Forest Park Pkwy?

The structure is 65 ft (19.9 m) long with a longest span of 64 ft (19.5 m) and a deck 80 ft wide.

Who owns Grand DR over Forest Park Pkwy?

It is owned by the City or Municipal Highway Agency.