US Bridges

Mercury DR over Dredge Fill Basin

Fair

Harris County, Texas · 1.80 MI S of IH 10 · Structure no. 121020AA4000005

Built
1985
40 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
4,900
2013 count
Owner
County
County Highway Agency

About this bridge

Mercury DR over Dredge Fill Basin is a prestressed concrete box beam or girders - multiple carrying Mercury DR over Dredge Fill Basin in Harris County, Texas. It was built in 1985, so it is 40 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 4,900 vehicles a day, projected to reach 7,000 by 2035. The structure is 36 ft (11 m) long and 46 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMercury DR
CrossesDredge Fill Basin
Location1.80 MI S of IH 10
RouteCounty Highway 0
CountyHarris County
StateTexas
Coordinates29.74925, -95.24051
Functional classUrban Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span36 ft (11 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,900 (2013)
Projected traffic7,000 by 2035
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Mercury DR over Dredge Fill Basin built?

It was built in 1985, making it 40 years old in 2025.

What condition is Mercury DR over Dredge Fill Basin 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 October 2023.

How much traffic does Mercury DR over Dredge Fill Basin carry?

About 4,900 vehicles per day (2013 count).

How long is Mercury DR over Dredge Fill Basin?

The structure is 36 ft (11 m) long with a longest span of 36 ft (11 m) and a deck 46 ft wide.

Who owns Mercury DR over Dredge Fill Basin?

It is owned by the County Highway Agency.