US Bridges

Clark RD over Brazos Riv Auth Canal

FairPosted for load

Brazoria County, Texas · 0.40 MI NE of Kirchner RD · Structure no. 120200W00215002

Built
1990
35 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
54 ft
4 main spans
Daily traffic
330
2018 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Clark RD over Brazos Riv Auth Canal is a wood or timber stringer/multi-beam or girder carrying Clark RD over Brazos Riv Auth Canal in Brazoria County, Texas. It was built in 1990, so it is 35 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 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 330 vehicles a day, projected to reach 550 by 2038. The structure is 54 ft (16.5 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesClark RD
CrossesBrazos Riv Auth Canal
Location0.40 MI NE of Kirchner RD
RouteCity Street 0
CountyBrazoria County
StateTexas
Coordinates29.46423, -95.37588
Functional classUrban 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating38 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span14 ft (4.3 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2018)
Projected traffic550 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$3,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Clark RD over Brazos Riv Auth Canal built?

It was built in 1990, making it 35 years old in 2025.

What condition is Clark RD over Brazos Riv Auth Canal 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 October 2023.

How much traffic does Clark RD over Brazos Riv Auth Canal carry?

About 330 vehicles per day (2018 count).

How long is Clark RD over Brazos Riv Auth Canal?

The structure is 54 ft (16.5 m) long with a longest span of 14 ft (4.3 m) and a deck 20 ft wide.

Who owns Clark RD over Brazos Riv Auth Canal?

It is owned by the Town or Township Highway Agency.