US Bridges

Seibels RD over Hannon Slough

Fair

Montgomery County, Alabama · 0.2 MI W of Narrow Lane · Structure no. 008405

Built
1964
61 years old
Condition
Fair
inspected July 2023
Type
Channel Beam
Concrete
Length
170 ft
5 main spans
Daily traffic
600
1992 count
Owner
City
City or Municipal Highway Agency

About this bridge

Seibels RD over Hannon Slough is a concrete channel beam carrying Seibels RD over Hannon Slough in Montgomery County, Alabama. It was built in 1964, so it is 61 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 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 600 vehicles a day, roughly 1% of them trucks, projected to reach 1,100 by 2043. The structure is 170 ft (51.8 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSeibels RD
CrossesHannon Slough
Location0.2 MI W of Narrow Lane
RouteCounty Highway 80
CountyMontgomery County
StateAlabama
Coordinates32.30785, -86.28311
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating70 US tons
Inventory rating20 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadH 20
Structure length170 ft (51.8 m)
Longest span34 ft (10.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (1992)
Projected traffic1,100 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Seibels RD over Hannon Slough built?

It was built in 1964, making it 61 years old in 2025.

What condition is Seibels RD over Hannon Slough 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 Seibels RD over Hannon Slough carry?

About 600 vehicles per day (1992 count), of which roughly 1% are trucks.

How long is Seibels RD over Hannon Slough?

The structure is 170 ft (51.8 m) long with a longest span of 34 ft (10.4 m) and a deck 26 ft wide.

Who owns Seibels RD over Hannon Slough?

It is owned by the City or Municipal Highway Agency.