US Bridges

Hipsley Mill Road over Patuxent River

Fair

Montgomery County, Maryland · 1.8 Miles North of Md 650 · Structure no. 200000M-0125010

Built
1973
52 years old, rebuilt 1996
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
716
2024 count
Owner
County
County Highway Agency

About this bridge

Hipsley Mill Road over Patuxent River is a steel stringer/multi-beam or girder carrying Hipsley Mill Road over Patuxent River in Montgomery County, Maryland. It was built in 1973 and reconstructed in 1996, so it is 52 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 5 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 716 vehicles a day, roughly 3% of them trucks, projected to reach 967 by 2044. The structure is 42 ft (12.8 m) long and 25 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesHipsley Mill Road
CrossesPatuxent River
Location1.8 Miles North of Md 650
RouteCounty Highway 49
CountyMontgomery County
StateMaryland
Coordinates39.26542, -77.11475
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating80 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span38 ft (11.6 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic716 (2024)
Projected traffic967 by 2044
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Hipsley Mill Road over Patuxent River built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1996.

What condition is Hipsley Mill Road over Patuxent River 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 October 2024.

How much traffic does Hipsley Mill Road over Patuxent River carry?

About 716 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Hipsley Mill Road over Patuxent River?

The structure is 42 ft (12.8 m) long with a longest span of 38 ft (11.6 m) and a deck 25 ft wide.

Who owns Hipsley Mill Road over Patuxent River?

It is owned by the County Highway Agency.