US Bridges

Grants Mill RD over I - 459

Fair

Jefferson County, Alabama · I-459 * Grants Mill RD · Structure no. 012307

Built
1980
45 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
364 ft
4 main spans
Daily traffic
1,500
2024 count
Owner
State
State Highway Agency

About this bridge

Grants Mill RD over I - 459 is a steel continuous stringer/multi-beam or girder carrying Grants Mill RD over I - 459 in Jefferson County, Alabama. It was built in 1980, so it is 45 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 1,500 vehicles a day, roughly 1% of them trucks, projected to reach 2,500 by 2044. The structure is 364 ft (110.8 m) long and 111 ft wide.

CarriesGrants Mill RD
CrossesI - 459
LocationI-459 * Grants Mill RD
RouteCity Street 0
StateAlabama
Coordinates33.52422, -86.66416
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 inspectionOctober 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 rating61.3 US tons
Inventory rating36.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length364 ft (110.8 m)
Longest span100 ft (30.5 m)
Deck width111 ft (33.8 m)
Roadway width106 ft (32.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2024)
Projected traffic2,500 by 2044
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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$10 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Grants Mill RD over I - 459 built?

It was built in 1980, making it 45 years old in 2025.

What condition is Grants Mill RD 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 October 2024.

How much traffic does Grants Mill RD over I - 459 carry?

About 1,500 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Grants Mill RD over I - 459?

The structure is 364 ft (110.8 m) long with a longest span of 100 ft (30.5 m) and a deck 111 ft wide.

Who owns Grants Mill RD over I - 459?

It is owned by the State Highway Agency.