US Bridges

Mt Brook Pkwy over Watkins Creek

Fair

Jefferson County, Alabama · Mt Brook Pkwy * Cahaba RD · Structure no. 002850

Built
1945
80 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
9,025
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mt Brook Pkwy over Watkins Creek is a concrete slab carrying Mt Brook Pkwy over Watkins Creek in Jefferson County, Alabama. It was built in 1945, so it is 80 years old, older 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 5 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 9,025 vehicles a day, roughly 1% of them trucks, projected to reach 13,000 by 2036. The structure is 26 ft (7.9 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMt Brook Pkwy
CrossesWatkins Creek
LocationMt Brook Pkwy * Cahaba RD
RouteCity Street 77
StateAlabama
Coordinates33.4761, -86.76359
Functional classUrban Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length26 ft (7.9 m)
Longest span23 ft (7 m)
Deck width35 ft (10.6 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,025 (2016)
Projected traffic13,000 by 2036
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$372,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mt Brook Pkwy over Watkins Creek built?

It was built in 1945, making it 80 years old in 2025.

What condition is Mt Brook Pkwy over Watkins Creek 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 March 2024.

How much traffic does Mt Brook Pkwy over Watkins Creek carry?

About 9,025 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Mt Brook Pkwy over Watkins Creek?

The structure is 26 ft (7.9 m) long with a longest span of 23 ft (7 m) and a deck 35 ft wide.

Who owns Mt Brook Pkwy over Watkins Creek?

It is owned by the City or Municipal Highway Agency.