US Bridges

SH 87 over Keith Lake

Fair

Jefferson County, Texas · 6.85 MI S of SH 82 · Structure no. 201240030701008

Built
1964
61 years old, rebuilt 1987
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
280 ft
7 main spans
Daily traffic
8,761
2022 count
Owner
State
State Highway Agency

About this bridge

SH 87 over Keith Lake is a prestressed concrete stringer/multi-beam or girder carrying SH 87 over Keith Lake in Jefferson County, Texas. It was built in 1964 and reconstructed in 1987, so it is 61 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 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 8,761 vehicles a day, roughly 16% of them trucks, projected to reach 12,265 by 2042. The structure is 280 ft (85.3 m) long and 46 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesSH 87
CrossesKeith Lake
Location6.85 MI S of SH 82
RouteState Highway 87
CountyJefferson County
StateTexas
Coordinates29.77534, -93.942
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length280 ft (85.3 m)
Longest span40 ft (12.2 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,761 (2022)
Projected traffic12,265 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$301,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 87 over Keith Lake built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1987.

What condition is SH 87 over Keith Lake 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 July 2024.

How much traffic does SH 87 over Keith Lake carry?

About 8,761 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is SH 87 over Keith Lake?

The structure is 280 ft (85.3 m) long with a longest span of 40 ft (12.2 m) and a deck 46 ft wide.

Who owns SH 87 over Keith Lake?

It is owned by the State Highway Agency.