US Bridges

IH 35 Ml & Wfr over Alligator Creek

Fair

Comal County, Texas · 3.2 MI N of SH 46 · Structure no. 150460001604014

Built
1948
77 years old, rebuilt 1994
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
191 ft
25 main spans
Daily traffic
112,918
2020 count
Owner
State
State Highway Agency

About this bridge

IH 35 Ml & Wfr over Alligator Creek is a concrete culvert carrying IH 35 Ml & Wfr over Alligator Creek in Comal County, Texas. It was built in 1948 and reconstructed in 1994, so it is 77 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 112,918 vehicles a day, roughly 20% of them trucks, projected to reach 106,840 by 2033. The structure is 191 ft (58.2 m) long and 200 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIH 35 Ml & Wfr
CrossesAlligator Creek
Location3.2 MI N of SH 46
RouteInterstate 35
StateTexas
Coordinates29.73724, -98.06844
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 inspectionJune 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
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 spans25
Design loadH 15
Structure length191 ft (58.2 m)
Longest span7 ft (2.1 m)
Deck width200 ft (61.1 m)
Roadway width158 ft (48.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112,918 (2020)
Projected traffic106,840 by 2033
Trucks20%
Lanes on structure8
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 & Wfr over Alligator Creek built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1994.

What condition is IH 35 Ml & Wfr over Alligator Creek 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 June 2024.

How much traffic does IH 35 Ml & Wfr over Alligator Creek carry?

About 112,918 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is IH 35 Ml & Wfr over Alligator Creek?

The structure is 191 ft (58.2 m) long with a longest span of 7 ft (2.1 m) and a deck 200 ft wide.

Who owns IH 35 Ml & Wfr over Alligator Creek?

It is owned by the State Highway Agency.