US Bridges

Co. Hwy. 450 Ext. over Muddy Prong Creek

FairPosted for load

Shelby County, Alabama · 2 MI East CR 55 · Structure no. 007594

Built
1962
63 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
59 ft
3 main spans
Daily traffic
200
2024 count
Owner
County
County Highway Agency

About this bridge

Co. Hwy. 450 Ext. over Muddy Prong Creek is a wood or timber stringer/multi-beam or girder carrying Co. Hwy. 450 Ext. over Muddy Prong Creek in Shelby County, Alabama. It was built in 1962, so it is 63 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 200 vehicles a day, roughly 10% of them trucks, projected to reach 280 by 2044. The structure is 59 ft (17.9 m) long and 16 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesCo. Hwy. 450 Ext.
CrossesMuddy Prong Creek
Location2 MI East CR 55
RouteCounty Highway 0
CountyShelby County
StateAlabama
Coordinates33.3353, -86.51717
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating15.7 US tons
Inventory rating11.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length59 ft (17.9 m)
Longest span19 ft (5.9 m)
Deck width16 ft (5 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2024)
Projected traffic280 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$301,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Co. Hwy. 450 Ext. over Muddy Prong Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Co. Hwy. 450 Ext. over Muddy Prong 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 September 2024.

How much traffic does Co. Hwy. 450 Ext. over Muddy Prong Creek carry?

About 200 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Co. Hwy. 450 Ext. over Muddy Prong Creek?

The structure is 59 ft (17.9 m) long with a longest span of 19 ft (5.9 m) and a deck 16 ft wide.

Who owns Co. Hwy. 450 Ext. over Muddy Prong Creek?

It is owned by the County Highway Agency.