US Bridges

Heintz Road over Branch of Mattese

Good

St. Louis County, Missouri · S 15 T 43 N R 6 E · Structure no. 36845

Built
2022
3 years old
Condition
Good
inspected April 2024
Type
Tee Beam
Prestressed Concrete
Length
94 ft
1 main span
Daily traffic
6,582
2024 count
Owner
County
County Highway Agency

About this bridge

Heintz Road over Branch of Mattese is a prestressed concrete tee beam carrying Heintz Road over Branch of Mattese in St. Louis County, Missouri. It was built in 2022, so it is 3 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 6,582 vehicles a day, roughly 3% of them trucks, projected to reach 8,886 by 2044. The structure is 94 ft (28.8 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesHeintz Road
CrossesBranch of Mattese
LocationS 15 T 43 N R 6 E
RouteCounty Highway 513
CountySt. Louis County
StateMissouri
Coordinates38.45836, -90.32485
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.3 US tons
Inventory rating54.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length94 ft (28.8 m)
Longest span92 ft (28 m)
Deck width41 ft (12.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,582 (2024)
Projected traffic8,886 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Heintz Road over Branch of Mattese built?

It was built in 2022, making it 3 years old in 2025.

What condition is Heintz Road over Branch of Mattese 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 Heintz Road over Branch of Mattese carry?

About 6,582 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Heintz Road over Branch of Mattese?

The structure is 94 ft (28.8 m) long with a longest span of 92 ft (28 m) and a deck 41 ft wide.

Who owns Heintz Road over Branch of Mattese?

It is owned by the County Highway Agency.