US Bridges

NH101 over Blood Brook

Fair

Hillsborough County, New Hampshire · 2.32 Mi. E. Peterboro Tl · Structure no. 025301050011300

Built
1931
94 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
23 ft
1 main span
Daily traffic
6,922
2023 count
Owner
State
State Highway Agency

About this bridge

NH101 over Blood Brook is a concrete tee beam carrying NH101 over Blood Brook in Hillsborough County, New Hampshire. It was built in 1931, so it is 94 years old, older 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 6,922 vehicles a day, roughly 7% of them trucks, projected to reach 10,244 by 2043. The structure is 23 ft (7 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNH101
CrossesBlood Brook
Location2.32 Mi. E. Peterboro Tl
RouteState Highway 101
CountyHillsborough County
StateNew Hampshire
Coordinates42.84181, -71.84108
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
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 rating27.7 US tons
Inventory rating16.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,922 (2023)
Projected traffic10,244 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 NH101 over Blood Brook built?

It was built in 1931, making it 94 years old in 2025.

What condition is NH101 over Blood 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 April 2024.

How much traffic does NH101 over Blood Brook carry?

About 6,922 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is NH101 over Blood Brook?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 40 ft wide.

Who owns NH101 over Blood Brook?

It is owned by the State Highway Agency.