US Bridges

Slone RD (cr 324) over Turtle Creek

Fair

Matagorda County, Texas · 1.5 MI W of SH 35 · Structure no. 131580AA0336001

Built
1985
40 years old
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
134
2022 count
Owner
County
County Highway Agency

About this bridge

Slone RD (cr 324) over Turtle Creek is a prestressed concrete box beam or girders - multiple carrying Slone RD (cr 324) over Turtle Creek in Matagorda County, Texas. It was built in 1985, so it is 40 years old, younger than the Texas average of 44.4 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 134 vehicles a day, roughly 3% of them trucks, projected to reach 78 by 2042. The structure is 60 ft (18.3 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSlone RD (cr 324)
CrossesTurtle Creek
Location1.5 MI W of SH 35
RouteCounty Highway 324
CountyMatagorda County
StateTexas
Coordinates28.77199, -96.23476
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length60 ft (18.3 m)
Longest span58 ft (17.7 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic134 (2022)
Projected traffic78 by 2042
Trucks3%
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

OwnerCounty Highway Agency
Maintained byCounty 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 Slone RD (cr 324) over Turtle Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Slone RD (cr 324) over Turtle 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 Slone RD (cr 324) over Turtle Creek carry?

About 134 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Slone RD (cr 324) over Turtle Creek?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.7 m) and a deck 32 ft wide.

Who owns Slone RD (cr 324) over Turtle Creek?

It is owned by the County Highway Agency.