US Bridges

SH 256 Log 1.73 over Black Bayou

Fair

Lonoke County, Arkansas · 3.5 MI S JCT SH 165 · Structure no. 0000000000M3537

Built
1949
76 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
105 ft
4 main spans
Daily traffic
140
2018 count
Owner
State
State Highway Agency

About this bridge

SH 256 Log 1.73 over Black Bayou is a steel stringer/multi-beam or girder carrying SH 256 Log 1.73 over Black Bayou in Lonoke County, Arkansas. It was built in 1949, so it is 76 years old, older than the Arkansas average of 45.1 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 140 vehicles a day, roughly 1% of them trucks, projected to reach 442 by 2028. The structure is 105 ft (32 m) long and 25 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSH 256 Log 1.73
CrossesBlack Bayou
Location3.5 MI S JCT SH 165
RouteState Highway 256
CountyLonoke County
StateArkansas
Coordinates34.50206, -91.97305
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.1 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length105 ft (32 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2018)
Projected traffic442 by 2028
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 256 Log 1.73 over Black Bayou built?

It was built in 1949, making it 76 years old in 2025.

What condition is SH 256 Log 1.73 over Black Bayou 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 July 2024.

How much traffic does SH 256 Log 1.73 over Black Bayou carry?

About 140 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is SH 256 Log 1.73 over Black Bayou?

The structure is 105 ft (32 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns SH 256 Log 1.73 over Black Bayou?

It is owned by the State Highway Agency.