US Bridges

Grimville Road over Gillis Falls

Fair

Carroll County, Maryland · 0.04 MI N of Flag Marsh · Structure no. 200000CL0308010

Built
1981
44 years old
Condition
Fair
inspected July 2023
Type
Truss - Thru
Steel
Length
67 ft
1 main span
Daily traffic
280
2021 count
Owner
County
County Highway Agency

About this bridge

Grimville Road over Gillis Falls is a steel truss - thru carrying Grimville Road over Gillis Falls in Carroll County, Maryland. It was built in 1981, so it is 44 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 280 vehicles a day, roughly 5% of them trucks, projected to reach 459 by 2041. The structure is 67 ft (20.4 m) long and 18 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesGrimville Road
CrossesGillis Falls
Location0.04 MI N of Flag Marsh
RouteCounty Highway 600
CountyCarroll County
StateMaryland
Coordinates39.3785, -77.09019
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.4 US tons
Inventory rating25.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length67 ft (20.4 m)
Longest span61 ft (18.6 m)
Deck width18 ft (5.5 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2021)
Projected traffic459 by 2041
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$115,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Grimville Road over Gillis Falls built?

It was built in 1981, making it 44 years old in 2025.

What condition is Grimville Road over Gillis Falls 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 July 2023.

How much traffic does Grimville Road over Gillis Falls carry?

About 280 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Grimville Road over Gillis Falls?

The structure is 67 ft (20.4 m) long with a longest span of 61 ft (18.6 m) and a deck 18 ft wide.

Who owns Grimville Road over Gillis Falls?

It is owned by the County Highway Agency.