US Bridges

Black Rock RD over Hcfcd Ditch

Good

Harris County, Texas · 0.90 MI S of Wallisvil RD · Structure no. 121020AA4642001

Built
1980
45 years old
Condition
Good
inspected September 2023
Type
Slab
Prestressed Concrete
Length
75 ft
3 main spans
Daily traffic
2,500
2013 count
Owner
County
County Highway Agency

About this bridge

Black Rock RD over Hcfcd Ditch is a prestressed concrete slab carrying Black Rock RD over Hcfcd Ditch in Harris County, Texas. It was built in 1980, so it is 45 years old, older 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 2,500 vehicles a day, roughly 1% of them trucks, projected to reach 4,000 by 2033. The structure is 75 ft (22.9 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBlack Rock RD
CrossesHcfcd Ditch
Location0.90 MI S of Wallisvil RD
RouteCounty Highway 0
CountyHarris County
StateTexas
Coordinates29.79589, -95.16742
Functional classUrban Local

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
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 typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span25 ft (7.6 m)
Deck width40 ft (12.3 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2013)
Projected traffic4,000 by 2033
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Black Rock RD over Hcfcd Ditch built?

It was built in 1980, making it 45 years old in 2025.

What condition is Black Rock RD over Hcfcd 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 September 2023.

How much traffic does Black Rock RD over Hcfcd Ditch carry?

About 2,500 vehicles per day (2013 count), of which roughly 1% are trucks.

How long is Black Rock RD over Hcfcd Ditch?

The structure is 75 ft (22.9 m) long with a longest span of 25 ft (7.6 m) and a deck 40 ft wide.

Who owns Black Rock RD over Hcfcd Ditch?

It is owned by the County Highway Agency.