US Bridges

Adlong School RD over Adlong Ditch

Good

Harris County, Texas · 0.4 MI S of US 90 · Structure no. 121020AA3650001

Built
1988
37 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
154 ft
3 main spans
Daily traffic
455
2022 count
Owner
County
County Highway Agency

About this bridge

Adlong School RD over Adlong Ditch is a prestressed concrete box beam or girders - multiple carrying Adlong School RD over Adlong Ditch in Harris County, Texas. It was built in 1988, so it is 37 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 455 vehicles a day, roughly 3% of them trucks, projected to reach 270 by 2042. The structure is 154 ft (46.9 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesAdlong School RD
CrossesAdlong Ditch
Location0.4 MI S of US 90
RouteCounty Highway 0
CountyHarris County
StateTexas
Coordinates29.93782, -95.02191
Functional classUrban Collector

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length154 ft (46.9 m)
Longest span60 ft (18.3 m)
Deck width38 ft (11.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic455 (2022)
Projected traffic270 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Adlong School RD over Adlong Ditch built?

It was built in 1988, making it 37 years old in 2025.

What condition is Adlong School RD over Adlong 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 September 2023.

How much traffic does Adlong School RD over Adlong Ditch carry?

About 455 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Adlong School RD over Adlong Ditch?

The structure is 154 ft (46.9 m) long with a longest span of 60 ft (18.3 m) and a deck 38 ft wide.

Who owns Adlong School RD over Adlong Ditch?

It is owned by the County Highway Agency.