US Bridges

Snwdn-Chambers Rd. over Drainage Relief

Good

Montgomery County, Alabama · 2.7 MI East of CO 61 · Structure no. 011417

Built
1981
44 years old
Condition
Good
inspected October 2023
Type
Channel Beam
Concrete
Length
144 ft
6 main spans
Daily traffic
430
1993 count
Owner
County
County Highway Agency

About this bridge

Snwdn-Chambers Rd. over Drainage Relief is a concrete channel beam carrying Snwdn-Chambers Rd. over Drainage Relief in Montgomery County, Alabama. It was built in 1981, so it is 44 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 430 vehicles a day, roughly 1% of them trucks, projected to reach 600 by 2044. The structure is 144 ft (43.9 m) long and 28 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesSnwdn-Chambers Rd.
CrossesDrainage Relief
Location2.7 MI East of CO 61
RouteCounty Highway 18
StateAlabama
Coordinates32.24728, -86.24932
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
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 alignment6: Equal to present minimum criteria
Operating rating75.9 US tons
Inventory rating45.5 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans6
Design loadHS 20
Structure length144 ft (43.9 m)
Longest span24 ft (7.3 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic430 (1993)
Projected traffic600 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$1.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Snwdn-Chambers Rd. over Drainage Relief built?

It was built in 1981, making it 44 years old in 2025.

What condition is Snwdn-Chambers Rd. over Drainage Relief 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 2023.

How much traffic does Snwdn-Chambers Rd. over Drainage Relief carry?

About 430 vehicles per day (1993 count), of which roughly 1% are trucks.

How long is Snwdn-Chambers Rd. over Drainage Relief?

The structure is 144 ft (43.9 m) long with a longest span of 24 ft (7.3 m) and a deck 28 ft wide.

Who owns Snwdn-Chambers Rd. over Drainage Relief?

It is owned by the County Highway Agency.