US Bridges

SR 99 - I-95B Loop over Altamaha Canal

Good

Glynn County, Georgia · 0.5 MI W of JCT SR 25 · Structure no. 000000012700400

Built
1967
58 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
4,170
2024 count
Owner
State
State Highway Agency

About this bridge

SR 99 - I-95B Loop over Altamaha Canal is a concrete culvert carrying SR 99 - I-95B Loop over Altamaha Canal in Glynn County, Georgia. It was built in 1967, so it is 58 years old, older than the Georgia average of 47.5 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 4,170 vehicles a day, roughly 1% of them trucks, projected to reach 4,230 by 2031. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 9.9 mi (16 km).

CarriesSR 99 - I-95B Loop
CrossesAltamaha Canal
Location0.5 MI W of JCT SR 25
RouteState Highway 99
StateGeorgia
Coordinates31.30956, -81.46774
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,170 (2024)
Projected traffic4,230 by 2031
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$199,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 99 - I-95B Loop over Altamaha Canal built?

It was built in 1967, making it 58 years old in 2025.

What condition is SR 99 - I-95B Loop over Altamaha Canal 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 October 2024.

How much traffic does SR 99 - I-95B Loop over Altamaha Canal carry?

About 4,170 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is SR 99 - I-95B Loop over Altamaha Canal?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m).

Who owns SR 99 - I-95B Loop over Altamaha Canal?

It is owned by the State Highway Agency.