US Bridges

FM 1663 over Sweet Bay Bayou

Fair

Chambers County, Texas · 0.95 MI W of FM 1410 · Structure no. 200360146401005

Built
1962
63 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
60 ft
2 main spans
Daily traffic
411
2024 count
Owner
State
State Highway Agency

About this bridge

FM 1663 over Sweet Bay Bayou is a concrete stringer/multi-beam or girder carrying FM 1663 over Sweet Bay Bayou in Chambers County, Texas. It was built in 1962, 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 411 vehicles a day, roughly 20% of them trucks, projected to reach 459 by 2042. The structure is 60 ft (18.3 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFM 1663
CrossesSweet Bay Bayou
Location0.95 MI W of FM 1410
RouteState Highway 1663
CountyChambers County
StateTexas
Coordinates29.85944, -94.50665
Functional classRural Minor 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 protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length60 ft (18.3 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic411 (2024)
Projected traffic459 by 2042
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 1663 over Sweet Bay Bayou built?

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

What condition is FM 1663 over Sweet Bay Bayou 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 May 2024.

How much traffic does FM 1663 over Sweet Bay Bayou carry?

About 411 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is FM 1663 over Sweet Bay Bayou?

The structure is 60 ft (18.3 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns FM 1663 over Sweet Bay Bayou?

It is owned by the State Highway Agency.