US Bridges

Mc Knight ST over Chimney Rock Ditch

Good

Harris County, Texas · 0.30 MI S of W Bellfort · Structure no. 121020B43633182

Built
1978
47 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
750
2013 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mc Knight ST over Chimney Rock Ditch is a concrete culvert carrying Mc Knight ST over Chimney Rock Ditch in Harris County, Texas. It was built in 1978, so it is 47 years old, older 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 750 vehicles a day, projected to reach 3,565 by 2033. The structure is 23 ft (7 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMc Knight ST
CrossesChimney Rock Ditch
Location0.30 MI S of W Bellfort
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.65564, -95.47781
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
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 typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width50 ft (15.1 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2013)
Projected traffic3,565 by 2033
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Mc Knight ST over Chimney Rock Ditch built?

It was built in 1978, making it 47 years old in 2025.

What condition is Mc Knight ST over Chimney Rock Ditch 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 August 2023.

How much traffic does Mc Knight ST over Chimney Rock Ditch carry?

About 750 vehicles per day (2013 count).

How long is Mc Knight ST over Chimney Rock Ditch?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 50 ft wide.

Who owns Mc Knight ST over Chimney Rock Ditch?

It is owned by the City or Municipal Highway Agency.