US Bridges

Thrasher Road over Blow-Me-Down Brook

Good

Sullivan County, New Hampshire · 0.2 MI from Plainfield T · Structure no. 005500760016800

Built
1996
29 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Thrasher Road over Blow-Me-Down Brook is a steel stringer/multi-beam or girder carrying Thrasher Road over Blow-Me-Down Brook in Sullivan County, New Hampshire. It was built in 1996, so it is 29 years old, younger than the New Hampshire average of 56.9 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 96 vehicles a day, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 55 ft (16.8 m) long and 20 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesThrasher Road
CrossesBlow-Me-Down Brook
Location0.2 MI from Plainfield T
CountySullivan County
StateNew Hampshire
Coordinates43.5174, -72.37029
Functional classRural Local

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length55 ft (16.8 m)
Longest span51 ft (15.5 m)
Deck width20 ft (6.1 m)
Roadway width17 ft (5.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$314,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Thrasher Road over Blow-Me-Down Brook built?

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

What condition is Thrasher Road over Blow-Me-Down Brook 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 September 2023.

How much traffic does Thrasher Road over Blow-Me-Down Brook carry?

About 96 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Thrasher Road over Blow-Me-Down Brook?

The structure is 55 ft (16.8 m) long with a longest span of 51 ft (15.5 m) and a deck 20 ft wide.

Who owns Thrasher Road over Blow-Me-Down Brook?

It is owned by the City or Municipal Highway Agency.