US Bridges

Crystal Rock Drive over Little Seneca Creek Trib

Fair

Montgomery County, Maryland · 0.6 Miles North of Md 27 · Structure no. 200000M-0365030

Built
1988
37 years old
Condition
Fair
inspected December 2023
Type
Culvert
Steel
Length
32 ft
Daily traffic
7,114
2022 count
Owner
County
County Highway Agency

About this bridge

Crystal Rock Drive over Little Seneca Creek Trib is a steel culvert carrying Crystal Rock Drive over Little Seneca Creek Trib in Montgomery County, Maryland. It was built in 1988, so it is 37 years old, younger than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 7,114 vehicles a day, roughly 2% of them trucks, projected to reach 9,603 by 2042. The structure is 32 ft (9.9 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCrystal Rock Drive
CrossesLittle Seneca Creek Trib
Location0.6 Miles North of Md 27
RouteCounty Highway 0
CountyMontgomery County
StateMaryland
Coordinates39.20006, -77.27637
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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
MaterialSteel
DeckNot applicable
Main spans0
Design loadHS 20
Structure length32 ft (9.9 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,114 (2022)
Projected traffic9,603 by 2042
Trucks2%
Lanes on structure3
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 Crystal Rock Drive over Little Seneca Creek Trib built?

It was built in 1988, making it 37 years old in 2025.

What condition is Crystal Rock Drive over Little Seneca Creek Trib in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2023.

How much traffic does Crystal Rock Drive over Little Seneca Creek Trib carry?

About 7,114 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Crystal Rock Drive over Little Seneca Creek Trib?

The structure is 32 ft (9.9 m) long with a longest span of 8 ft (2.4 m).

Who owns Crystal Rock Drive over Little Seneca Creek Trib?

It is owned by the County Highway Agency.