US Bridges

Nunnally Lake Road over Unknown Creek

Fair

Calhoun County, Alabama · Nunnally Lake Road · Structure no. 017798

Built
2002
23 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
55 ft
4 main spans
Daily traffic
2,498
2019 count
Owner
County
County Highway Agency

About this bridge

Nunnally Lake Road over Unknown Creek is a concrete culvert carrying Nunnally Lake Road over Unknown Creek in Calhoun County, Alabama. It was built in 2002, so it is 23 years old, younger 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 2,498 vehicles a day, roughly 5% of them trucks, projected to reach 3,639 by 2044. The structure is 55 ft (16.9 m) long and 70 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNunnally Lake Road
CrossesUnknown Creek
LocationNunnally Lake Road
RouteCounty Highway 0
CountyCalhoun County
StateAlabama
Coordinates33.85361, -85.97609
Functional classRural Minor 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98 US tons
Inventory rating79.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length55 ft (16.9 m)
Longest span11 ft (3.5 m)
Deck width70 ft (21.3 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,498 (2019)
Projected traffic3,639 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nunnally Lake Road over Unknown Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is Nunnally Lake Road over Unknown Creek 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 February 2024.

How much traffic does Nunnally Lake Road over Unknown Creek carry?

About 2,498 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Nunnally Lake Road over Unknown Creek?

The structure is 55 ft (16.9 m) long with a longest span of 11 ft (3.5 m) and a deck 70 ft wide.

Who owns Nunnally Lake Road over Unknown Creek?

It is owned by the County Highway Agency.