US Bridges

Chimney Rock NB over Spring Branch

Good

Harris County, Texas · 0.10 MI S of IH 10 · Structure no. 121020B14401027

Built
1989
36 years old
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Multiple
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 NB over Spring Branch is a prestressed concrete box beam or girders - multiple carrying Chimney Rock NB over Spring Branch in Harris County, Texas. It was built in 1989, so it is 36 years old, younger 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 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 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesChimney Rock NB
CrossesSpring Branch
Location0.10 MI S of IH 10
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.7816, -95.48474
Functional classUrban Minor Arterial

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 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 typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length152 ft (46.3 m)
Longest span50 ft (15.2 m)
Deck width34 ft (10.5 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 statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$9,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Chimney Rock NB over Spring Branch built?

It was built in 1989, making it 36 years old in 2025.

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

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

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

How long is Chimney Rock NB 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 34 ft wide.

Who owns Chimney Rock NB over Spring Branch?

It is owned by the City or Municipal Highway Agency.