US Bridges

Cowan Road over Drainage Ditch

Good

Galveston County, Texas · 0.15 MI E of Rymal Road · Structure no. 120850AA0117001

Built
1999
26 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
150
2010 count
Owner
County
County Highway Agency

About this bridge

Cowan Road over Drainage Ditch is a concrete culvert carrying Cowan Road over Drainage Ditch in Galveston County, Texas. It was built in 1999, so it is 26 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 150 vehicles a day, projected to reach 150 by 2028. The structure is 24 ft (7.3 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesCowan Road
CrossesDrainage Ditch
Location0.15 MI E of Rymal Road
RouteCounty Highway 0
CountyGalveston County
StateTexas
Coordinates29.40811, -95.16336
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width31 ft (9.3 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2010)
Projected traffic150 by 2028
Trucks0%
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 Cowan Road over Drainage Ditch built?

It was built in 1999, making it 26 years old in 2025.

What condition is Cowan Road 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 October 2023.

How much traffic does Cowan Road over Drainage Ditch carry?

About 150 vehicles per day (2010 count).

How long is Cowan Road over Drainage Ditch?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m) and a deck 31 ft wide.

Who owns Cowan Road over Drainage Ditch?

It is owned by the County Highway Agency.