US Bridges

FM 1764 over Drainage Ditch

Fair

Galveston County, Texas · 0.40 MI E of SH 146 · Structure no. 120850160701004

Built
1959
66 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
49 ft
4 main spans
Daily traffic
26,174
2023 count
Owner
State
State Highway Agency

About this bridge

FM 1764 over Drainage Ditch is a concrete culvert carrying FM 1764 over Drainage Ditch in Galveston County, Texas. It was built in 1959, so it is 66 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 5 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 26,174 vehicles a day, roughly 4% of them trucks, projected to reach 36,644 by 2042. The structure is 49 ft (14.9 m) long and 97 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFM 1764
CrossesDrainage Ditch
Location0.40 MI E of SH 146
RouteState Highway 1764
CountyGalveston County
StateTexas
Coordinates29.39533, -94.94434
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length49 ft (14.9 m)
Longest span10 ft (3 m)
Deck width97 ft (29.7 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,174 (2023)
Projected traffic36,644 by 2042
Trucks4%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
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$10,000
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 1764 over Drainage Ditch built?

It was built in 1959, making it 66 years old in 2025.

What condition is FM 1764 over Drainage Ditch 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 August 2024.

How much traffic does FM 1764 over Drainage Ditch carry?

About 26,174 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is FM 1764 over Drainage Ditch?

The structure is 49 ft (14.9 m) long with a longest span of 10 ft (3 m) and a deck 97 ft wide.

Who owns FM 1764 over Drainage Ditch?

It is owned by the State Highway Agency.