US Bridges

Liberty Parkway over Old Overton Rd;cahaba R

Good

Jefferson County, Alabama · .1 MI E I459 N · Structure no. 015799

Built
1984
41 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
311 ft
4 main spans
Daily traffic
2,625
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Liberty Parkway over Old Overton Rd;cahaba R is a prestressed concrete stringer/multi-beam or girder carrying Liberty Parkway over Old Overton Rd;cahaba R in Jefferson County, Alabama. It was built in 1984, so it is 41 years old, younger than the Alabama average of 51.1 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.

It carries about 2,625 vehicles a day, roughly 10% of them trucks, projected to reach 3,600 by 2043. The structure is 311 ft (94.7 m) long and 67 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesLiberty Parkway
CrossesOld Overton Rd;cahaba R
Location.1 MI E I459 N
RouteCounty Highway 0
CountyJefferson County
StateAlabama
Coordinates33.4854, -86.70837
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating78.2 US tons
Inventory rating37.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length311 ft (94.7 m)
Longest span79 ft (24.1 m)
Deck width67 ft (20.4 m)
Roadway width63 ft (19.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,625 (2023)
Projected traffic3,600 by 2043
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost$5.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Liberty Parkway over Old Overton Rd;cahaba R built?

It was built in 1984, making it 41 years old in 2025.

What condition is Liberty Parkway over Old Overton Rd;cahaba R 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 July 2023.

How much traffic does Liberty Parkway over Old Overton Rd;cahaba R carry?

About 2,625 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Liberty Parkway over Old Overton Rd;cahaba R?

The structure is 311 ft (94.7 m) long with a longest span of 79 ft (24.1 m) and a deck 67 ft wide.

Who owns Liberty Parkway over Old Overton Rd;cahaba R?

It is owned by the City or Municipal Highway Agency.