US Bridges

CO 141 (middlebroo over Gunners Branch

Good

Montgomery County, Maryland · 0.1 Mile West of Is 270 · Structure no. 100000150184030

Built
1959
66 years old, rebuilt 1991
Condition
Good
inspected March 2023
Type
Culvert
Steel
Length
29 ft
2 main spans
Daily traffic
16,296
2006 count
Owner
State
State Highway Agency

About this bridge

CO 141 (middlebroo over Gunners Branch is a steel culvert carrying CO 141 (middlebroo over Gunners Branch in Montgomery County, Maryland. It was built in 1959 and reconstructed in 1991, so it is 66 years old, older than the Maryland average of 52.6 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 16,296 vehicles a day, projected to reach 19,516 by 2026. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCO 141 (middlebroo
CrossesGunners Branch
Location0.1 Mile West of Is 270
RouteCounty Highway 141
CountyMontgomery County
StateMaryland
Coordinates39.18279, -77.25556
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,296 (2006)
Projected traffic19,516 by 2026
Trucks—
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 CO 141 (middlebroo over Gunners Branch built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1991.

What condition is CO 141 (middlebroo over Gunners 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 March 2023.

How much traffic does CO 141 (middlebroo over Gunners Branch carry?

About 16,296 vehicles per day (2006 count).

How long is CO 141 (middlebroo over Gunners Branch?

The structure is 29 ft (8.8 m) long with a longest span of 13 ft (4 m).

Who owns CO 141 (middlebroo over Gunners Branch?

It is owned by the State Highway Agency.