US Bridges

Mackland Ave over Rvr Des Peres

GoodPosted for load

St. Louis city, Missouri · S 2037 T 45 N R 7 E · Structure no. 12432

Built
1926
99 years old, rebuilt 1986
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
121 ft
2 main spans
Daily traffic
5,587
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mackland Ave over Rvr Des Peres is a prestressed concrete stringer/multi-beam or girder carrying Mackland Ave over Rvr Des Peres in St. Louis city, Missouri. It was built in 1926 and reconstructed in 1986, so it is 99 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. Its operating status is: posted for load restriction.

It carries about 5,587 vehicles a day, roughly 5% of them trucks, projected to reach 7,542 by 2044. The structure is 121 ft (36.9 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMackland Ave
CrossesRvr Des Peres
LocationS 2037 T 45 N R 7 E
RouteCity Street 0
Coordinates38.62217, -90.27608
Functional classUrban Collector

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 protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating49.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length121 ft (36.9 m)
Longest span60 ft (18.3 m)
Deck width35 ft (10.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,587 (2024)
Projected traffic7,542 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$986,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mackland Ave over Rvr Des Peres built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1986.

What condition is Mackland Ave over Rvr Des Peres 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 March 2024.

How much traffic does Mackland Ave over Rvr Des Peres carry?

About 5,587 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Mackland Ave over Rvr Des Peres?

The structure is 121 ft (36.9 m) long with a longest span of 60 ft (18.3 m) and a deck 35 ft wide.

Who owns Mackland Ave over Rvr Des Peres?

It is owned by the City or Municipal Highway Agency.