US Bridges

CO RD 18 over I - 459

Fair

Jefferson County, Alabama · CO RD 18 * I459 · Structure no. 012700

Built
1982
43 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
360 ft
4 main spans
Daily traffic
5,000
2024 count
Owner
State
State Highway Agency

About this bridge

CO RD 18 over I - 459 is a steel continuous stringer/multi-beam or girder carrying CO RD 18 over I - 459 in Jefferson County, Alabama. It was built in 1982, so it is 43 years old, younger than the Alabama average of 51.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,000 vehicles a day, roughly 6% of them trucks, projected to reach 6,500 by 2044. The structure is 360 ft (109.7 m) long and 72 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCO RD 18
CrossesI - 459
LocationCO RD 18 * I459
RouteCounty Highway 18
CountyJefferson County
StateAlabama
Coordinates33.33257, -86.99793
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating47.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length360 ft (109.7 m)
Longest span100 ft (30.5 m)
Deck width72 ft (21.8 m)
Roadway width69 ft (20.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2024)
Projected traffic6,500 by 2044
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$6.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was CO RD 18 over I - 459 built?

It was built in 1982, making it 43 years old in 2025.

What condition is CO RD 18 over I - 459 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does CO RD 18 over I - 459 carry?

About 5,000 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is CO RD 18 over I - 459?

The structure is 360 ft (109.7 m) long with a longest span of 100 ft (30.5 m) and a deck 72 ft wide.

Who owns CO RD 18 over I - 459?

It is owned by the State Highway Agency.