US Bridges

Southfork DR WB over Detention Ditch

Fair

Brazoria County, Texas · 0.25 MI W of Old Choc Byu · Structure no. 120200AA2006001

Built
1985
40 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
630
2011 count
Owner
County
County Highway Agency

About this bridge

Southfork DR WB over Detention Ditch is a prestressed concrete box beam or girders - multiple carrying Southfork DR WB over Detention Ditch in Brazoria 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 630 vehicles a day, projected to reach 1,200 by 2031. The structure is 39 ft (11.9 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSouthfork DR WB
CrossesDetention Ditch
Location0.25 MI W of Old Choc Byu
RouteCounty Highway 648
CountyBrazoria County
StateTexas
Coordinates29.5421, -95.35185
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
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
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span37 ft (11.3 m)
Deck width32 ft (9.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic630 (2011)
Projected traffic1,200 by 2031
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Southfork DR WB over Detention Ditch built?

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

What condition is Southfork DR WB over Detention Ditch 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 August 2023.

How much traffic does Southfork DR WB over Detention Ditch carry?

About 630 vehicles per day (2011 count).

How long is Southfork DR WB over Detention Ditch?

The structure is 39 ft (11.9 m) long with a longest span of 37 ft (11.3 m) and a deck 32 ft wide.

Who owns Southfork DR WB over Detention Ditch?

It is owned by the County Highway Agency.