US Bridges

Marriottsville RD over Piney Run

Fair

Carroll County, Maryland · 0.13 MI N Howard CO Line · Structure no. 200000CL0333010

Built
1977
48 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
77 ft
1 main span
Daily traffic
12,255
2021 count
Owner
County
County Highway Agency

About this bridge

Marriottsville RD over Piney Run is a steel stringer/multi-beam or girder carrying Marriottsville RD over Piney Run in Carroll County, Maryland. It was built in 1977, so it is 48 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 12,255 vehicles a day, roughly 8% of them trucks, projected to reach 20,090 by 2041. The structure is 77 ft (23.5 m) long and 39 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesMarriottsville RD
CrossesPiney Run
Location0.13 MI N Howard CO Line
RouteCounty Highway 740
CountyCarroll County
StateMaryland
Coordinates39.35331, -76.89708
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating71 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length77 ft (23.5 m)
Longest span72 ft (21.9 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,255 (2021)
Projected traffic20,090 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Marriottsville RD over Piney Run built?

It was built in 1977, making it 48 years old in 2025.

What condition is Marriottsville RD over Piney Run 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 August 2023.

How much traffic does Marriottsville RD over Piney Run carry?

About 12,255 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Marriottsville RD over Piney Run?

The structure is 77 ft (23.5 m) long with a longest span of 72 ft (21.9 m) and a deck 39 ft wide.

Who owns Marriottsville RD over Piney Run?

It is owned by the County Highway Agency.