US Bridges

Thurston Road over Bennett Creek

Fair

Frederick County, Maryland · 0.75 MI S of Peters RD · Structure no. 200000F-0702010

Built
1964
61 years old, rebuilt 2018
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
1,632
2024 count
Owner
County
County Highway Agency

About this bridge

Thurston Road over Bennett Creek is a steel stringer/multi-beam or girder carrying Thurston Road over Bennett Creek in Frederick County, Maryland. It was built in 1964 and reconstructed in 2018, so it is 61 years old, older 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 1,632 vehicles a day, roughly 5% of them trucks, projected to reach 1,991 by 2044. The structure is 51 ft (15.5 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesThurston Road
CrossesBennett Creek
Location0.75 MI S of Peters RD
RouteCounty Highway 349
CountyFrederick County
StateMaryland
Coordinates39.29425, -77.3626
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 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 rating69.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length51 ft (15.5 m)
Longest span46 ft (14 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,632 (2024)
Projected traffic1,991 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Thurston Road over Bennett Creek built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2018.

What condition is Thurston Road over Bennett Creek 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 October 2024.

How much traffic does Thurston Road over Bennett Creek carry?

About 1,632 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Thurston Road over Bennett Creek?

The structure is 51 ft (15.5 m) long with a longest span of 46 ft (14 m) and a deck 28 ft wide.

Who owns Thurston Road over Bennett Creek?

It is owned by the County Highway Agency.