US Bridges

Chimney Rock SB over Spring Branch

Fair

Harris County, Texas · 0.10 MI S of IH 10 · Structure no. 121020B14401028

Built
1965
60 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
152 ft
3 main spans
Daily traffic
11,105
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Chimney Rock SB over Spring Branch is a prestressed concrete stringer/multi-beam or girder carrying Chimney Rock SB over Spring Branch in Harris County, Texas. It was built in 1965, so it is 60 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.

It carries about 11,105 vehicles a day, roughly 2% of them trucks, projected to reach 15,547 by 2042. The structure is 152 ft (46.3 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesChimney Rock SB
CrossesSpring Branch
Location0.10 MI S of IH 10
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.7818, -95.48484
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
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
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length152 ft (46.3 m)
Longest span50 ft (15.2 m)
Deck width33 ft (10.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,105 (2022)
Projected traffic15,547 by 2042
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$9,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Chimney Rock SB over Spring Branch built?

It was built in 1965, making it 60 years old in 2025.

What condition is Chimney Rock SB over Spring Branch 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 December 2023.

How much traffic does Chimney Rock SB over Spring Branch carry?

About 11,105 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Chimney Rock SB over Spring Branch?

The structure is 152 ft (46.3 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns Chimney Rock SB over Spring Branch?

It is owned by the City or Municipal Highway Agency.