US Bridges

Glen Mill Road over Piney Branch

Fair

Montgomery County, Maryland · 0.6 Miles N of Glen Road · Structure no. 200000M-0016010

Built
1960
65 years old, rebuilt 2002
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
12,144
2022 count
Owner
County
County Highway Agency

About this bridge

Glen Mill Road over Piney Branch is a steel stringer/multi-beam or girder carrying Glen Mill Road over Piney Branch in Montgomery County, Maryland. It was built in 1960 and reconstructed in 2002, so it is 65 years old, older 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 12,144 vehicles a day, roughly 3% of them trucks, projected to reach 13,692 by 2042. The structure is 29 ft (8.8 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesGlen Mill Road
CrossesPiney Branch
Location0.6 Miles N of Glen Road
RouteCounty Highway 193
CountyMontgomery County
StateMaryland
Coordinates39.05387, -77.21714
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75.5 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span27 ft (8.2 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,144 (2022)
Projected traffic13,692 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Glen Mill Road over Piney Branch built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2002.

What condition is Glen Mill Road over Piney Branch 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 June 2024.

How much traffic does Glen Mill Road over Piney Branch carry?

About 12,144 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Glen Mill Road over Piney Branch?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.2 m) and a deck 33 ft wide.

Who owns Glen Mill Road over Piney Branch?

It is owned by the County Highway Agency.