US Bridges

IH 35 NB Off Ramp over San Francisco Drain

Good

Webb County, Texas · 1.60 MI N of US 59 · Structure no. 222400001806127

Built
1975
50 years old
Condition
Good
inspected November 2022
Type
Culvert
Concrete
Length
65 ft
2 main spans
Daily traffic
7,500
2013 count
Owner
State
State Highway Agency

About this bridge

IH 35 NB Off Ramp over San Francisco Drain is a concrete culvert carrying IH 35 NB Off Ramp over San Francisco Drain in Webb County, Texas. It was built in 1975, so it is 50 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 7,500 vehicles a day, roughly 5% of them trucks, projected to reach 10,510 by 2033. The structure is 65 ft (19.8 m) long.

CarriesIH 35 NB Off Ramp
CrossesSan Francisco Drain
Location1.60 MI N of US 59
RouteInterstate 35
StateTexas
Coordinates27.55387, -99.50343
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
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 spans2
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span7 ft (2.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2013)
Projected traffic10,510 by 2033
Trucks5%
Lanes on structure1
Traffic directionOne-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 NB Off Ramp over San Francisco Drain built?

It was built in 1975, making it 50 years old in 2025.

What condition is IH 35 NB Off Ramp over San Francisco Drain 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 NB Off Ramp over San Francisco Drain carry?

About 7,500 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is IH 35 NB Off Ramp over San Francisco Drain?

The structure is 65 ft (19.8 m) long with a longest span of 7 ft (2.1 m).

Who owns IH 35 NB Off Ramp over San Francisco Drain?

It is owned by the State Highway Agency.