US Bridges

SR 99 over Swan Creek

Good

Limestone County, Alabama · 0.1 M W JCT SR 99 & SR 3 · Structure no. 019074

Built
2009
16 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
180 ft
3 main spans
Daily traffic
11,120
2024 count
Owner
State
State Highway Agency

About this bridge

SR 99 over Swan Creek is a prestressed concrete stringer/multi-beam or girder carrying SR 99 over Swan Creek in Limestone County, Alabama. It was built in 2009, so it is 16 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 11,120 vehicles a day, roughly 3% of them trucks, projected to reach 14,977 by 2033. The structure is 180 ft (54.9 m) long and 54 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSR 99
CrossesSwan Creek
Location0.1 M W JCT SR 99 & SR 3
RouteState Highway 99
CountyLimestone County
StateAlabama
Coordinates34.8188, -86.9473
Functional classUrban Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating69.2 US tons
Inventory rating47.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span60 ft (18.3 m)
Deck width54 ft (16.4 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,120 (2024)
Projected traffic14,977 by 2033
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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$2.6 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 99 over Swan Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is SR 99 over Swan Creek 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 June 2024.

How much traffic does SR 99 over Swan Creek carry?

About 11,120 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is SR 99 over Swan Creek?

The structure is 180 ft (54.9 m) long with a longest span of 60 ft (18.3 m) and a deck 54 ft wide.

Who owns SR 99 over Swan Creek?

It is owned by the State Highway Agency.