US Bridges

Knife Box Road over Garey Mill Pond Branch

Fair

Caroline County, Maryland · 2.0 Miles North of Md 317 · Structure no. 200000CO0015010

Built
1996
29 years old
Condition
Fair
inspected December 2023
Type
Slab
Wood or Timber
Length
54 ft
2 main spans
Daily traffic
1,065
2022 count
Owner
County
County Highway Agency

About this bridge

Knife Box Road over Garey Mill Pond Branch is a wood or timber slab carrying Knife Box Road over Garey Mill Pond Branch in Caroline County, Maryland. It was built in 1996, so it is 29 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 1,065 vehicles a day, roughly 1% of them trucks, projected to reach 1,434 by 2042. The structure is 54 ft (16.5 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesKnife Box Road
CrossesGarey Mill Pond Branch
Location2.0 Miles North of Md 317
RouteCounty Highway 65
CountyCaroline County
StateMaryland
Coordinates38.92411, -75.75767
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating34.9 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length54 ft (16.5 m)
Longest span26 ft (7.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,065 (2022)
Projected traffic1,434 by 2042
Trucks1%
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 Knife Box Road over Garey Mill Pond Branch built?

It was built in 1996, making it 29 years old in 2025.

What condition is Knife Box Road over Garey Mill Pond 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 December 2023.

How much traffic does Knife Box Road over Garey Mill Pond Branch carry?

About 1,065 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Knife Box Road over Garey Mill Pond Branch?

The structure is 54 ft (16.5 m) long with a longest span of 26 ft (7.9 m) and a deck 32 ft wide.

Who owns Knife Box Road over Garey Mill Pond Branch?

It is owned by the County Highway Agency.