US Bridges

Old Alvin RD over Hickory Slough

Good

Brazoria County, Texas · 0.02 MI S of Knapp RD · Structure no. 120200M01825002

Built
2012
13 years old
Condition
Good
inspected August 2023
Type
Slab
Prestressed Concrete
Length
78 ft
3 main spans
Daily traffic
3,100
2011 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Old Alvin RD over Hickory Slough is a prestressed concrete slab carrying Old Alvin RD over Hickory Slough in Brazoria County, Texas. It was built in 2012, so it is 13 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,100 vehicles a day, projected to reach 4,500 by 2031. The structure is 78 ft (23.8 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesOld Alvin RD
CrossesHickory Slough
Location0.02 MI S of Knapp RD
RouteCity Street 0
CountyBrazoria County
StateTexas
Coordinates29.59077, -95.27852
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length78 ft (23.8 m)
Longest span26 ft (7.9 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2011)
Projected traffic4,500 by 2031
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$10,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Alvin RD over Hickory Slough built?

It was built in 2012, making it 13 years old in 2025.

What condition is Old Alvin RD over Hickory Slough in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Old Alvin RD over Hickory Slough carry?

About 3,100 vehicles per day (2011 count).

How long is Old Alvin RD over Hickory Slough?

The structure is 78 ft (23.8 m) long with a longest span of 26 ft (7.9 m) and a deck 30 ft wide.

Who owns Old Alvin RD over Hickory Slough?

It is owned by the Town or Township Highway Agency.