US Bridges

Harmony Road over Little Catoctin Creek

Good

Frederick County, Maryland · 0.25 MI South of US 40 · Structure no. 200000F-1624010

Built
1999
26 years old
Condition
Good
inspected July 2023
Type
Slab
Wood or Timber
Length
77 ft
2 main spans
Daily traffic
1,296
2021 count
Owner
County
County Highway Agency

About this bridge

Harmony Road over Little Catoctin Creek is a wood or timber slab carrying Harmony Road over Little Catoctin Creek in Frederick County, Maryland. It was built in 1999, so it is 26 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 1,296 vehicles a day, roughly 5% of them trucks, projected to reach 1,930 by 2041. The structure is 77 ft (23.4 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesHarmony Road
CrossesLittle Catoctin Creek
Location0.25 MI South of US 40
RouteCounty Highway 136
CountyFrederick County
StateMaryland
Coordinates39.48218, -77.53487
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating95 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length77 ft (23.4 m)
Longest span37 ft (11.3 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,296 (2021)
Projected traffic1,930 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Harmony Road over Little Catoctin Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is Harmony Road over Little Catoctin Creek 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 July 2023.

How much traffic does Harmony Road over Little Catoctin Creek carry?

About 1,296 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Harmony Road over Little Catoctin Creek?

The structure is 77 ft (23.4 m) long with a longest span of 37 ft (11.3 m) and a deck 32 ft wide.

Who owns Harmony Road over Little Catoctin Creek?

It is owned by the County Highway Agency.