US Bridges

SR91 Tpk NB 153.1 over SR 70

Good

St. Lucie County, Florida · 2.6 Miles North of SR-709 · Structure no. 940135

Built
1991
34 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
210 ft
3 main spans
Daily traffic
23,450
2022 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR91 Tpk NB 153.1 over SR 70 is a prestressed concrete stringer/multi-beam or girder carrying SR91 Tpk NB 153.1 over SR 70 in St. Lucie County, Florida. It was built in 1991, so it is 34 years old, younger than the Florida average of 41.3 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 23,450 vehicles a day, roughly 20% of them trucks, projected to reach 40,686 by 2042. The structure is 210 ft (64 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR91 Tpk NB 153.1
CrossesSR 70
Location2.6 Miles North of SR-709
RouteState Highway 91
CountySt. Lucie County
StateFlorida
Coordinates27.41239, -80.40184
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length210 ft (64 m)
Longest span118 ft (36 m)
Deck width59 ft (18.1 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,450 (2022)
Projected traffic40,686 by 2042
Trucks20%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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 SR91 Tpk NB 153.1 over SR 70 built?

It was built in 1991, making it 34 years old in 2025.

What condition is SR91 Tpk NB 153.1 over SR 70 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 December 2023.

How much traffic does SR91 Tpk NB 153.1 over SR 70 carry?

About 23,450 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is SR91 Tpk NB 153.1 over SR 70?

The structure is 210 ft (64 m) long with a longest span of 118 ft (36 m) and a deck 59 ft wide.

Who owns SR91 Tpk NB 153.1 over SR 70?

It is owned by the State Toll Authority.