US Bridges

Mykawa RD NB over Sims Bayou

Good

Harris County, Texas · 0.70 MI S of Bellfort DR · Structure no. 121020B68025004

Built
2004
21 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
309 ft
3 main spans
Daily traffic
5,500
2011 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mykawa RD NB over Sims Bayou is a prestressed concrete box beam or girders - multiple carrying Mykawa RD NB over Sims Bayou in Harris County, Texas. It was built in 2004, so it is 21 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 5,500 vehicles a day, projected to reach 10,000 by 2031. The structure is 309 ft (94.2 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMykawa RD NB
CrossesSims Bayou
Location0.70 MI S of Bellfort DR
RouteCity Street 0
CountyHarris County
StateTexas
Coordinates29.65496, -95.31494
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length309 ft (94.2 m)
Longest span103 ft (31.4 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,500 (2011)
Projected traffic10,000 by 2031
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mykawa RD NB over Sims Bayou built?

It was built in 2004, making it 21 years old in 2025.

What condition is Mykawa RD NB over Sims Bayou 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 October 2023.

How much traffic does Mykawa RD NB over Sims Bayou carry?

About 5,500 vehicles per day (2011 count).

How long is Mykawa RD NB over Sims Bayou?

The structure is 309 ft (94.2 m) long with a longest span of 103 ft (31.4 m) and a deck 29 ft wide.

Who owns Mykawa RD NB over Sims Bayou?

It is owned by the City or Municipal Highway Agency.