US Bridges

Derby Pkwy over Seaboard R.R.

Good

Jefferson County, Alabama · Derby Pkwy * RR Alton · Structure no. 015240

Built
1990
35 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
147 ft
3 main spans
Daily traffic
2,000
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Derby Pkwy over Seaboard R.R. is a steel stringer/multi-beam or girder carrying Derby Pkwy over Seaboard R.R. in Jefferson County, Alabama. It was built in 1990, so it is 35 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 2,000 vehicles a day, roughly 1% of them trucks, projected to reach 2,500 by 2038. The structure is 147 ft (44.8 m) long and 87 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesDerby Pkwy
CrossesSeaboard R.R.
LocationDerby Pkwy * RR Alton
RouteCity Street 0
CountyJefferson County
StateAlabama
Coordinates33.57306, -86.645
Functional classUrban Local

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.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating62.9 US tons
Inventory rating37.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length147 ft (44.8 m)
Longest span62 ft (18.9 m)
Deck width87 ft (26.4 m)
Roadway width85 ft (25.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2018)
Projected traffic2,500 by 2038
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 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$3.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Derby Pkwy over Seaboard R.R. built?

It was built in 1990, making it 35 years old in 2025.

What condition is Derby Pkwy over Seaboard R.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 March 2024.

How much traffic does Derby Pkwy over Seaboard R.R. carry?

About 2,000 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Derby Pkwy over Seaboard R.R.?

The structure is 147 ft (44.8 m) long with a longest span of 62 ft (18.9 m) and a deck 87 ft wide.

Who owns Derby Pkwy over Seaboard R.R.?

It is owned by the City or Municipal Highway Agency.