US Bridges

SH 347 NB over FM 366

Fair

Jefferson County, Texas · At FM 366 Int · Structure no. 201240066701007

Built
1964
61 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
313 ft
3 main spans
Daily traffic
10,465
2022 count
Owner
State
State Highway Agency

About this bridge

SH 347 NB over FM 366 is a steel continuous stringer/multi-beam or girder carrying SH 347 NB over FM 366 in Jefferson County, Texas. It was built in 1964, so it is 61 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 10,465 vehicles a day, roughly 11% of them trucks, projected to reach 13,450 by 2033. The structure is 313 ft (95.4 m) long and 33 ft wide.

Location

Open in Google Maps
CarriesSH 347 NB
CrossesFM 366
LocationAt FM 366 Int
RouteState Highway 347
CountyJefferson County
StateTexas
Coordinates29.98565, -94.00156
Functional classUrban Other Principal Arterial

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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadH 20
Structure length313 ft (95.4 m)
Longest span100 ft (30.5 m)
Deck width33 ft (10.1 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,465 (2022)
Projected traffic13,450 by 2033
Trucks11%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$18,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH 347 NB over FM 366 built?

It was built in 1964, making it 61 years old in 2025.

What condition is SH 347 NB over FM 366 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 2024.

How much traffic does SH 347 NB over FM 366 carry?

About 10,465 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is SH 347 NB over FM 366?

The structure is 313 ft (95.4 m) long with a longest span of 100 ft (30.5 m) and a deck 33 ft wide.

Who owns SH 347 NB over FM 366?

It is owned by the State Highway Agency.