US Bridges

IH 45 Access Rds over Alligator Crk N.Mc.

Fair

Montgomery County, Texas · 0.30 MI S of SH 105 · Structure no. 121700067508074

Built
1962
63 years old, rebuilt 2009
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
46 ft
4 main spans
Daily traffic
499
2022 count
Owner
State
State Highway Agency

About this bridge

IH 45 Access Rds over Alligator Crk N.Mc. is a concrete culvert carrying IH 45 Access Rds over Alligator Crk N.Mc. in Montgomery County, Texas. It was built in 1962 and reconstructed in 2009, so it is 63 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 499 vehicles a day, roughly 3% of them trucks, projected to reach 1,350 by 2042. The structure is 46 ft (14 m) long and 506 ft wide.

Location

Open in Google Maps
CarriesIH 45 Access Rds
CrossesAlligator Crk N.Mc.
Location0.30 MI S of SH 105
RouteInterstate 45
CountyMontgomery County
StateTexas
Coordinates30.31056, -95.46928
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than 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 spans4
Design loadHS 20
Structure length46 ft (14 m)
Longest span10 ft (3 m)
Deck width506 ft (154.2 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic499 (2022)
Projected traffic1,350 by 2042
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo
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 45 Access Rds over Alligator Crk N.Mc. built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2009.

What condition is IH 45 Access Rds over Alligator Crk N.Mc. 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 September 2024.

How much traffic does IH 45 Access Rds over Alligator Crk N.Mc. carry?

About 499 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is IH 45 Access Rds over Alligator Crk N.Mc.?

The structure is 46 ft (14 m) long with a longest span of 10 ft (3 m) and a deck 506 ft wide.

Who owns IH 45 Access Rds over Alligator Crk N.Mc.?

It is owned by the State Highway Agency.