US Bridges

Keyes Hill Road over Blood Brook

Good

Hillsborough County, New Hampshire · 0.58MI Temple Tl · Structure no. 027700600010900

Built
1999
26 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
59 ft
1 main span
Daily traffic
189
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Keyes Hill Road over Blood Brook is a wood or timber stringer/multi-beam or girder carrying Keyes Hill Road over Blood Brook in Hillsborough County, New Hampshire. It was built in 1999, so it is 26 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 189 vehicles a day, projected to reach 279 by 2043. The structure is 59 ft (18 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesKeyes Hill Road
CrossesBlood Brook
Location0.58MI Temple Tl
RouteCity Street 0
CountyHillsborough County
StateNew Hampshire
Coordinates42.83178, -71.80911
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
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 alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating67 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length59 ft (18 m)
Longest span50 ft (15.2 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic189 (2023)
Projected traffic279 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Keyes Hill Road over Blood Brook built?

It was built in 1999, making it 26 years old in 2025.

What condition is Keyes Hill Road over Blood 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 July 2024.

How much traffic does Keyes Hill Road over Blood Brook carry?

About 189 vehicles per day (2023 count).

How long is Keyes Hill Road over Blood Brook?

The structure is 59 ft (18 m) long with a longest span of 50 ft (15.2 m) and a deck 24 ft wide.

Who owns Keyes Hill Road over Blood Brook?

It is owned by the City or Municipal Highway Agency.