US Bridges

Groff Road over Unicorn Branch

Good

Queen Anne's County, Maryland · 0.1 MI from Md RTE 313 · Structure no. 200000Q-0008010

Built
2007
18 years old
Condition
Good
inspected May 2024
Type
Slab
Wood or Timber
Length
54 ft
2 main spans
Daily traffic
56
2024 count
Owner
County
County Highway Agency

About this bridge

Groff Road over Unicorn Branch is a wood or timber slab carrying Groff Road over Unicorn Branch in Queen Anne's County, Maryland. It was built in 2007, so it is 18 years old, younger than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 56 vehicles a day, roughly 5% of them trucks, projected to reach 69 by 2044. The structure is 54 ft (16.5 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesGroff Road
CrossesUnicorn Branch
Location0.1 MI from Md RTE 313
RouteCounty Highway 44
Coordinates39.25092, -75.86167
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating60 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 25 or greater
Structure length54 ft (16.5 m)
Longest span25 ft (7.6 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56 (2024)
Projected traffic69 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Groff Road over Unicorn Branch built?

It was built in 2007, making it 18 years old in 2025.

What condition is Groff Road over Unicorn Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does Groff Road over Unicorn Branch carry?

About 56 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Groff Road over Unicorn Branch?

The structure is 54 ft (16.5 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns Groff Road over Unicorn Branch?

It is owned by the County Highway Agency.