US Bridges

Grimes Avenue over Drainage Ditch D

Fair

Cameron County, Texas · 0.08 MI E of Lp 499 · Structure no. 210310E00485001

Built
1991
34 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
4,575
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Grimes Avenue over Drainage Ditch D is a concrete culvert carrying Grimes Avenue over Drainage Ditch D in Cameron County, Texas. It was built in 1991, so it is 34 years old, younger 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 4,575 vehicles a day, roughly 5% of them trucks, projected to reach 4,410 by 2029. The structure is 23 ft (7 m) long and 136 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesGrimes Avenue
CrossesDrainage Ditch D
Location0.08 MI E of Lp 499
RouteCity Street 485
StateTexas
Coordinates26.20548, -97.65332
Functional classUrban Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width136 ft (41.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,575 (2024)
Projected traffic4,410 by 2029
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Grimes Avenue over Drainage Ditch D built?

It was built in 1991, making it 34 years old in 2025.

What condition is Grimes Avenue over Drainage Ditch D 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 March 2024.

How much traffic does Grimes Avenue over Drainage Ditch D carry?

About 4,575 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Grimes Avenue over Drainage Ditch D?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 136 ft wide.

Who owns Grimes Avenue over Drainage Ditch D?

It is owned by the City or Municipal Highway Agency.