US Bridges

Hillridge RD over Big Island Slough

FairPosted for load

Harris County, Texas · 0.05 MI E of Roseberry DR · Structure no. 121020L32002001

Built
1968
57 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
103 ft
3 main spans
Daily traffic
1,200
2011 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Hillridge RD over Big Island Slough is a concrete stringer/multi-beam or girder carrying Hillridge RD over Big Island Slough in Harris County, Texas. It was built in 1968, so it is 57 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. Its operating status is: posted for load restriction.

It carries about 1,200 vehicles a day, projected to reach 1,400 by 2031. The structure is 103 ft (31.4 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHillridge RD
CrossesBig Island Slough
Location0.05 MI E of Roseberry DR
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.65921, -95.07655
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length103 ft (31.4 m)
Longest span41 ft (12.5 m)
Deck width39 ft (12 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2011)
Projected traffic1,400 by 2031
Trucks0%
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

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$18,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Hillridge RD over Big Island Slough built?

It was built in 1968, making it 57 years old in 2025.

What condition is Hillridge RD over Big Island Slough 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 September 2023.

How much traffic does Hillridge RD over Big Island Slough carry?

About 1,200 vehicles per day (2011 count).

How long is Hillridge RD over Big Island Slough?

The structure is 103 ft (31.4 m) long with a longest span of 41 ft (12.5 m) and a deck 39 ft wide.

Who owns Hillridge RD over Big Island Slough?

It is owned by the Town or Township Highway Agency.