US Bridges

Frankfort RD over Throckmorton Branch

PoorPosted for load

Colbert County, Alabama · Frankfort RD near Old Lee · Structure no. 002231

Built
1940
85 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
40 ft
2 main spans
Daily traffic
1,550
1990 count
Owner
City
City or Municipal Highway Agency

About this bridge

Frankfort RD over Throckmorton Branch is a steel continuous stringer/multi-beam or girder carrying Frankfort RD over Throckmorton Branch in Colbert County, Alabama. It was built in 1940, so it is 85 years old, older than the Alabama average of 51.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 1,550 vehicles a day, roughly 2% of them trucks, projected to reach 3,000 by 2044. The structure is 40 ft (12.3 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFrankfort RD
CrossesThrockmorton Branch
LocationFrankfort RD near Old Lee
RouteCity Street 0
CountyColbert County
StateAlabama
Coordinates34.72373, -87.71548
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating3 US tons
Inventory rating2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length40 ft (12.3 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,550 (1990)
Projected traffic3,000 by 2044
Trucks2%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$389,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Frankfort RD over Throckmorton Branch built?

It was built in 1940, making it 85 years old in 2025.

What condition is Frankfort RD over Throckmorton Branch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does Frankfort RD over Throckmorton Branch carry?

About 1,550 vehicles per day (1990 count), of which roughly 2% are trucks.

How long is Frankfort RD over Throckmorton Branch?

The structure is 40 ft (12.3 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns Frankfort RD over Throckmorton Branch?

It is owned by the City or Municipal Highway Agency.