US Bridges

Bonny Brook Lane over Great Seneca Creek Tribu

Good

Montgomery County, Maryland · 0.05 Mi. N. of Hawkins CR · Structure no. 200000M-0490030

Built
2000
25 years old
Condition
Good
inspected October 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
22 ft
Daily traffic
200
2024 count
Owner
County
County Highway Agency

About this bridge

Bonny Brook Lane over Great Seneca Creek Tribu is a aluminum, wrought iron, or cast iron culvert carrying Bonny Brook Lane over Great Seneca Creek Tribu in Montgomery County, Maryland. It was built in 2000, so it is 25 years old, younger 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 200 vehicles a day, projected to reach 245 by 2044. The structure is 22 ft (6.6 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesBonny Brook Lane
CrossesGreat Seneca Creek Tribu
Location0.05 Mi. N. of Hawkins CR
RouteCounty Highway 7557
CountyMontgomery County
StateMaryland
Coordinates39.27037, -77.19011
Functional classRural 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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans0
Design loadHS 20
Structure length22 ft (6.6 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2024)
Projected traffic245 by 2044
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 Bonny Brook Lane over Great Seneca Creek Tribu built?

It was built in 2000, making it 25 years old in 2025.

What condition is Bonny Brook Lane over Great Seneca Creek Tribu 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 2024.

How much traffic does Bonny Brook Lane over Great Seneca Creek Tribu carry?

About 200 vehicles per day (2024 count).

How long is Bonny Brook Lane over Great Seneca Creek Tribu?

The structure is 22 ft (6.6 m) long with a longest span of 9 ft (2.7 m).

Who owns Bonny Brook Lane over Great Seneca Creek Tribu?

It is owned by the County Highway Agency.