US Bridges

Mirror Lake Circle over Detention Basin

Good

Montgomery County, Texas · 0.2 MI W of Highlands Pkw · Structure no. 121700AA6477060

Built
2021
4 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
250
2022 count
Owner
County
County Highway Agency

About this bridge

Mirror Lake Circle over Detention Basin is a prestressed concrete stringer/multi-beam or girder carrying Mirror Lake Circle over Detention Basin in Montgomery County, Texas. It was built in 2021, so it is 4 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 250 vehicles a day, projected to reach 1,000 by 2042. The structure is 73 ft (22.3 m) long and 53 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesMirror Lake Circle
CrossesDetention Basin
Location0.2 MI W of Highlands Pkw
RouteCity Street 0
CountyMontgomery County
StateTexas
Coordinates30.13213, -95.31227
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable 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 spans1
Design loadHL 93
Structure length73 ft (22.3 m)
Longest span73 ft (22.3 m)
Deck width53 ft (16.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2022)
Projected traffic1,000 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Mirror Lake Circle over Detention Basin built?

It was built in 2021, making it 4 years old in 2025.

What condition is Mirror Lake Circle over Detention Basin 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 Mirror Lake Circle over Detention Basin carry?

About 250 vehicles per day (2022 count).

How long is Mirror Lake Circle over Detention Basin?

The structure is 73 ft (22.3 m) long with a longest span of 73 ft (22.3 m) and a deck 53 ft wide.

Who owns Mirror Lake Circle over Detention Basin?

It is owned by the County Highway Agency.