US Bridges

FM 1485 over E Fork San Jacinto Riv

Fair

Montgomery County, Texas · 5.4 MI E of Lp 494 · Structure no. 121700106201011

Built
1969
56 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
280 ft
7 main spans
Daily traffic
11,160
2023 count
Owner
State
State Highway Agency

About this bridge

FM 1485 over E Fork San Jacinto Riv is a concrete stringer/multi-beam or girder carrying FM 1485 over E Fork San Jacinto Riv in Montgomery County, Texas. It was built in 1969, so it is 56 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 11,160 vehicles a day, roughly 4% of them trucks, projected to reach 15,624 by 2042. The structure is 280 ft (85.3 m) long and 46 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesFM 1485
CrossesE Fork San Jacinto Riv
Location5.4 MI E of Lp 494
RouteState Highway 1485
CountyMontgomery County
StateTexas
Coordinates30.14527, -95.12466
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 geometry5: 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 rating59 US tons
Inventory rating34.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadH 20
Structure length280 ft (85.3 m)
Longest span40 ft (12.2 m)
Deck width46 ft (13.9 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,160 (2023)
Projected traffic15,624 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 1485 over E Fork San Jacinto Riv built?

It was built in 1969, making it 56 years old in 2025.

What condition is FM 1485 over E Fork San Jacinto Riv 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 October 2024.

How much traffic does FM 1485 over E Fork San Jacinto Riv carry?

About 11,160 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is FM 1485 over E Fork San Jacinto Riv?

The structure is 280 ft (85.3 m) long with a longest span of 40 ft (12.2 m) and a deck 46 ft wide.

Who owns FM 1485 over E Fork San Jacinto Riv?

It is owned by the State Highway Agency.