US Bridges

Rock Prairie RD over SH 6

Good

Brazos County, Texas · 3.58 MI SE of SH 30 · Structure no. 170210004912133

Built
1990
35 years old, rebuilt 2014
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
260 ft
4 main spans
Daily traffic
21,360
2015 count
Owner
State
State Highway Agency

About this bridge

Rock Prairie RD over SH 6 is a prestressed concrete stringer/multi-beam or girder carrying Rock Prairie RD over SH 6 in Brazos County, Texas. It was built in 1990 and reconstructed in 2014, 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 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 21,360 vehicles a day, roughly 1% of them trucks, projected to reach 34,000 by 2035. The structure is 260 ft (79.2 m) long and 145 ft wide.

CarriesRock Prairie RD
CrossesSH 6
Location3.58 MI SE of SH 30
RouteCity Street 0
StateTexas
Coordinates30.58489, -96.28495
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span70 ft (21.3 m)
Deck width145 ft (44.2 m)
Roadway width77 ft (23.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,360 (2015)
Projected traffic34,000 by 2035
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Rock Prairie RD over SH 6 built?

It was built in 1990, making it 35 years old in 2025. It was reconstructed in 2014.

What condition is Rock Prairie RD over SH 6 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 February 2023.

How much traffic does Rock Prairie RD over SH 6 carry?

About 21,360 vehicles per day (2015 count), of which roughly 1% are trucks.

How long is Rock Prairie RD over SH 6?

The structure is 260 ft (79.2 m) long with a longest span of 70 ft (21.3 m) and a deck 145 ft wide.

Who owns Rock Prairie RD over SH 6?

It is owned by the State Highway Agency.