US Bridges

Mcashan Drive over I - 20/59

Fair

Jefferson County, Alabama · Rock Mt Lake Exit · Structure no. 012918

Built
1983
42 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
288 ft
4 main spans
Daily traffic
2,000
2023 count
Owner
State
State Highway Agency

About this bridge

Mcashan Drive over I - 20/59 is a prestressed concrete stringer/multi-beam or girder carrying Mcashan Drive over I - 20/59 in Jefferson County, Alabama. It was built in 1983, so it is 42 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 2,000 vehicles a day, roughly 50% of them trucks, projected to reach 3,000 by 2043. The structure is 288 ft (87.8 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMcashan Drive
CrossesI - 20/59
LocationRock Mt Lake Exit
RouteCounty Highway 0
CountyJefferson County
StateAlabama
Coordinates33.32419, -87.04814
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.6 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length288 ft (87.8 m)
Longest span70 ft (21.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2023)
Projected traffic3,000 by 2043
Trucks50%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost$3.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mcashan Drive over I - 20/59 built?

It was built in 1983, making it 42 years old in 2025.

What condition is Mcashan Drive over I - 20/59 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 July 2023.

How much traffic does Mcashan Drive over I - 20/59 carry?

About 2,000 vehicles per day (2023 count), of which roughly 50% are trucks.

How long is Mcashan Drive over I - 20/59?

The structure is 288 ft (87.8 m) long with a longest span of 70 ft (21.3 m) and a deck 43 ft wide.

Who owns Mcashan Drive over I - 20/59?

It is owned by the State Highway Agency.