US Bridges

IH 35 Ml & NB FR over Drainage Ditch

Fair

Bexar County, Texas · 0.65 MI S of Loop 1604 · Structure no. 150150001607024

Built
1934
91 years old, rebuilt 1987
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
29 ft
5 main spans
Daily traffic
223,597
2022 count
Owner
State
State Highway Agency

About this bridge

IH 35 Ml & NB FR over Drainage Ditch is a concrete culvert carrying IH 35 Ml & NB FR over Drainage Ditch in Bexar County, Texas. It was built in 1934 and reconstructed in 1987, so it is 91 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 223,597 vehicles a day, roughly 10% of them trucks, projected to reach 313,036 by 2042. The structure is 29 ft (8.8 m) long and 72 ft wide.

Location

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CarriesIH 35 Ml & NB FR
CrossesDrainage Ditch
Location0.65 MI S of Loop 1604
RouteInterstate 35
CountyBexar County
StateTexas
Coordinates29.5611, -98.34111
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
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
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
DeckNot applicable
Main spans5
Design loadH 15
Structure length29 ft (8.8 m)
Longest span5 ft (1.5 m)
Deck width72 ft (21.9 m)
Roadway width0 ft (0 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic223,597 (2022)
Projected traffic313,036 by 2042
Trucks10%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 & NB FR over Drainage Ditch built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1987.

What condition is IH 35 Ml & NB FR over Drainage Ditch in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

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

About 223,597 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is IH 35 Ml & NB FR over Drainage Ditch?

The structure is 29 ft (8.8 m) long with a longest span of 5 ft (1.5 m) and a deck 72 ft wide.

Who owns IH 35 Ml & NB FR over Drainage Ditch?

It is owned by the State Highway Agency.