US Bridges

Thurston Road over Little Bennett Creek

Good

Frederick County, Maryland · 1.8 MI S of Peters RD · Structure no. 200000F-0703010

Built
1986
39 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
478
2009 count
Owner
County
County Highway Agency

About this bridge

Thurston Road over Little Bennett Creek is a steel stringer/multi-beam or girder carrying Thurston Road over Little Bennett Creek in Frederick County, Maryland. It was built in 1986, so it is 39 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 478 vehicles a day, roughly 5% of them trucks, projected to reach 574 by 2032. The structure is 57 ft (17.4 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesThurston Road
CrossesLittle Bennett Creek
Location1.8 MI S of Peters RD
RouteCounty Highway 349
Coordinates39.28061, -77.35846
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 rating71.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span52 ft (15.9 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic478 (2009)
Projected traffic574 by 2032
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 Little Bennett Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Thurston Road over Little Bennett 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 June 2023.

How much traffic does Thurston Road over Little Bennett Creek carry?

About 478 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Thurston Road over Little Bennett Creek?

The structure is 57 ft (17.4 m) long with a longest span of 52 ft (15.9 m) and a deck 27 ft wide.

Who owns Thurston Road over Little Bennett Creek?

It is owned by the County Highway Agency.