US Bridges

CR 170 over Drainage Ditch

Good

Brazoria County, Texas · 1.85 MI S of CR 169 · Structure no. 120200AA0859001

Built
2010
15 years old
Condition
Good
inspected November 2023
Type
Slab
Prestressed Concrete
Length
100 ft
1 main span
Daily traffic
10
2017 count
Owner
County
County Highway Agency

About this bridge

CR 170 over Drainage Ditch is a prestressed concrete slab carrying CR 170 over Drainage Ditch in Brazoria County, Texas. It was built in 2010, so it is 15 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 10 vehicles a day, roughly 1% of them trucks, projected to reach 10 by 2037. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCR 170
CrossesDrainage Ditch
Location1.85 MI S of CR 169
RouteCounty Highway 170
CountyBrazoria County
StateTexas
Coordinates29.33301, -95.2231
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
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 spans1 (+2 approach)
Design loadHL 93
Structure length100 ft (30.5 m)
Longest span40 ft (12.2 m)
Deck width30 ft (9.2 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2017)
Projected traffic10 by 2037
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 CR 170 over Drainage Ditch built?

It was built in 2010, making it 15 years old in 2025.

What condition is CR 170 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 November 2023.

How much traffic does CR 170 over Drainage Ditch carry?

About 10 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is CR 170 over Drainage Ditch?

The structure is 100 ft (30.5 m) long with a longest span of 40 ft (12.2 m) and a deck 30 ft wide.

Who owns CR 170 over Drainage Ditch?

It is owned by the County Highway Agency.