US Bridges

FM 1375 over Lake Conroe

Fair

Walker County, Texas · 6.7 MI W of IH 45 · Structure no. 172360140202009

Built
1972
53 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
690 ft
9 main spans
Daily traffic
1,319
2019 count
Owner
State
State Highway Agency

About this bridge

FM 1375 over Lake Conroe is a prestressed concrete stringer/multi-beam or girder carrying FM 1375 over Lake Conroe in Walker County, Texas. It was built in 1972, so it is 53 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 1,319 vehicles a day, roughly 4% of them trucks, projected to reach 1,583 by 2039. The structure is 690 ft (210.3 m) long and 42 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesFM 1375
CrossesLake Conroe
Location6.7 MI W of IH 45
RouteState Highway 1375
CountyWalker County
StateTexas
Coordinates30.52502, -95.60243
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length690 ft (210.3 m)
Longest span80 ft (24.4 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,319 (2019)
Projected traffic1,583 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

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 FM 1375 over Lake Conroe built?

It was built in 1972, making it 53 years old in 2025.

What condition is FM 1375 over Lake Conroe 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 July 2023.

How much traffic does FM 1375 over Lake Conroe carry?

About 1,319 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is FM 1375 over Lake Conroe?

The structure is 690 ft (210.3 m) long with a longest span of 80 ft (24.4 m) and a deck 42 ft wide.

Who owns FM 1375 over Lake Conroe?

It is owned by the State Highway Agency.