US Bridges

Karnack Ave over Unnamed Drainage

PoorPosted for load

Harrison County, Texas · 600 N of 51st ST · Structure no. 000021594-68093

Built
1950
75 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
71 ft
3 main spans
Daily traffic
10
2024 count
Owner
Federal
Bureau of Fish and Wildlife

About this bridge

Karnack Ave over Unnamed Drainage is a steel continuous stringer/multi-beam or girder carrying Karnack Ave over Unnamed Drainage in Harrison County, Texas. It was built in 1950, so it is 75 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, projected to reach 15 by 2044. The structure is 71 ft (21.6 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesKarnack Ave
CrossesUnnamed Drainage
Location600 N of 51st ST
RouteFederal Lands Road 0
CountyHarrison County
StateTexas
Coordinates32.68233, -94.135
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length71 ft (21.6 m)
Longest span21 ft (6.4 m)
Deck width23 ft (7 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deck107 ft (32.7 m)

Traffic and service

Average daily traffic10 (2024)
Projected traffic15 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Fish and Wildlife
Maintained byBureau of Fish and Wildlife
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$442,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Karnack Ave over Unnamed Drainage built?

It was built in 1950, making it 75 years old in 2025.

What condition is Karnack Ave over Unnamed Drainage in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Karnack Ave over Unnamed Drainage carry?

About 10 vehicles per day (2024 count).

How long is Karnack Ave over Unnamed Drainage?

The structure is 71 ft (21.6 m) long with a longest span of 21 ft (6.4 m) and a deck 23 ft wide.

Who owns Karnack Ave over Unnamed Drainage?

It is owned by the Bureau of Fish and Wildlife.