US Bridges

IH 35 Ml & Nbfr over Drainage Ditch

Good

Webb County, Texas · 1.20 MI N of US 83 · Structure no. 222400001806091

Built
1965
60 years old
Condition
Good
inspected November 2022
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
7,847
2024 count
Owner
State
State Highway Agency

About this bridge

IH 35 Ml & Nbfr over Drainage Ditch is a concrete culvert carrying IH 35 Ml & Nbfr over Drainage Ditch in Webb County, Texas. It was built in 1965, so it is 60 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.

It carries about 7,847 vehicles a day, roughly 18% of them trucks, projected to reach 70,420 by 2033. The structure is 33 ft (10.1 m) long and 261 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIH 35 Ml & Nbfr
CrossesDrainage Ditch
Location1.20 MI N of US 83
RouteInterstate 35
StateTexas
Coordinates27.52356, -99.50291
Functional classUrban Principal Arterial - Interstate

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 inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span7 ft (2.1 m)
Deck width261 ft (79.6 m)
Roadway width149 ft (45.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,847 (2024)
Projected traffic70,420 by 2033
Trucks18%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IH 35 Ml & Nbfr over Drainage Ditch built?

It was built in 1965, making it 60 years old in 2025.

What condition is IH 35 Ml & Nbfr 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 2022.

How much traffic does IH 35 Ml & Nbfr over Drainage Ditch carry?

About 7,847 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is IH 35 Ml & Nbfr over Drainage Ditch?

The structure is 33 ft (10.1 m) long with a longest span of 7 ft (2.1 m) and a deck 261 ft wide.

Who owns IH 35 Ml & Nbfr over Drainage Ditch?

It is owned by the State Highway Agency.