US Bridges

CR 171 over Drainage Ditch

GoodPosted for load

Brazoria County, Texas · 0.50 MI NE of SH 35 · Structure no. 120200AA0812006

Built
1963
62 years old
Condition
Good
inspected December 2023
Type
Slab
Concrete
Length
54 ft
2 main spans
Daily traffic
2,770
2012 count
Owner
County
County Highway Agency

About this bridge

CR 171 over Drainage Ditch is a concrete slab carrying CR 171 over Drainage Ditch in Brazoria County, Texas. It was built in 1963, so it is 62 years old, older 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. Its operating status is: posted for load restriction.

It carries about 2,770 vehicles a day, roughly 2% of them trucks, projected to reach 3,500 by 2032. The structure is 54 ft (16.5 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCR 171
CrossesDrainage Ditch
Location0.50 MI NE of SH 35
RouteCounty Highway 171
CountyBrazoria County
StateTexas
Coordinates29.17172, -95.41119
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span27 ft (8.2 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,770 (2012)
Projected traffic3,500 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-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 statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$4,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 171 over Drainage Ditch built?

It was built in 1963, making it 62 years old in 2025.

What condition is CR 171 over Drainage Ditch 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 December 2023.

How much traffic does CR 171 over Drainage Ditch carry?

About 2,770 vehicles per day (2012 count), of which roughly 2% are trucks.

How long is CR 171 over Drainage Ditch?

The structure is 54 ft (16.5 m) long with a longest span of 27 ft (8.2 m) and a deck 28 ft wide.

Who owns CR 171 over Drainage Ditch?

It is owned by the County Highway Agency.