US Bridges

Shady Grove Road over Mill Creek

Fair

Montgomery County, Maryland · 1.1 MI South of Md 115 · Structure no. 200000M-0193020

Built
1975
50 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
25 ft
Daily traffic
37,762
2023 count
Owner
County
County Highway Agency

About this bridge

Shady Grove Road over Mill Creek is a concrete culvert carrying Shady Grove Road over Mill Creek in Montgomery County, Maryland. It was built in 1975, so it is 50 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 37,762 vehicles a day, roughly 5% of them trucks, projected to reach 44,030 by 2045. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesShady Grove Road
CrossesMill Creek
Location1.1 MI South of Md 115
RouteCounty Highway 212
CountyMontgomery County
StateMaryland
Coordinates39.13548, -77.15665
Functional classUrban Other Principal Arterial

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.4 US tons
Inventory rating50 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,762 (2023)
Projected traffic44,030 by 2045
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Shady Grove Road over Mill Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Shady Grove Road over Mill Creek 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 September 2024.

How much traffic does Shady Grove Road over Mill Creek carry?

About 37,762 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Shady Grove Road over Mill Creek?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Shady Grove Road over Mill Creek?

It is owned by the County Highway Agency.