US Bridges

Town Road over Mink Brook

Fair

Grafton County, New Hampshire · 50 Ft FR Hanover Ctr RD · Structure no. 011401120007100

Built
1980
45 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
27 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Town Road over Mink Brook is a steel stringer/multi-beam or girder carrying Town Road over Mink Brook in Grafton County, New Hampshire. It was built in 1980, so it is 45 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 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 96 vehicles a day, projected to reach 142 by 2043. The structure is 27 ft (8.2 m) long and 12 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

No coordinates are recorded for this structure.

CarriesTown Road
CrossesMink Brook
Location50 Ft FR Hanover Ctr RD
CountyGrafton County
StateNew Hampshire
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20 + Mod
Structure length27 ft (8.2 m)
Longest span23 ft (7 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
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 Town Road over Mink Brook built?

It was built in 1980, making it 45 years old in 2025.

What condition is Town Road over Mink Brook 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 August 2023.

How much traffic does Town Road over Mink Brook carry?

About 96 vehicles per day (2023 count).

How long is Town Road over Mink Brook?

The structure is 27 ft (8.2 m) long with a longest span of 23 ft (7 m) and a deck 12 ft wide.

Who owns Town Road over Mink Brook?

It is owned by the City or Municipal Highway Agency.