US Bridges

FM 1847 over Drainage Ditch

Good

Cameron County, Texas · 1.90 MI S of SH 100 · Structure no. 210310180101006

Built
2009
16 years old
Condition
Good
inspected March 2023
Type
Slab
Prestressed Concrete
Length
130 ft
3 main spans
Daily traffic
15,304
2023 count
Owner
State
State Highway Agency

About this bridge

FM 1847 over Drainage Ditch is a prestressed concrete slab carrying FM 1847 over Drainage Ditch in Cameron County, Texas. It was built in 2009, so it is 16 years old, younger than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15,304 vehicles a day, roughly 1% of them trucks, projected to reach 14,290 by 2033. The structure is 130 ft (39.6 m) long and 70 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFM 1847
CrossesDrainage Ditch
Location1.90 MI S of SH 100
RouteState Highway 1847
CountyCameron County
StateTexas
Coordinates26.04384, -97.47872
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length130 ft (39.6 m)
Longest span45 ft (13.7 m)
Deck width70 ft (21.4 m)
Roadway width68 ft (20.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,304 (2023)
Projected traffic14,290 by 2033
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM 1847 over Drainage Ditch built?

It was built in 2009, making it 16 years old in 2025.

What condition is FM 1847 over Drainage Ditch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does FM 1847 over Drainage Ditch carry?

About 15,304 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is FM 1847 over Drainage Ditch?

The structure is 130 ft (39.6 m) long with a longest span of 45 ft (13.7 m) and a deck 70 ft wide.

Who owns FM 1847 over Drainage Ditch?

It is owned by the State Highway Agency.