US Bridges

Pleasant Pond Road over Collins Brook

Good

Hillsborough County, New Hampshire · 1.53 Mi. RTE 47 · Structure no. 008600990014600

Built
2010
15 years old
Condition
Good
inspected October 2024
Type
Frame
Concrete
Length
24 ft
1 main span
Daily traffic
159
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Pleasant Pond Road over Collins Brook is a concrete frame carrying Pleasant Pond Road over Collins Brook in Hillsborough County, New Hampshire. It was built in 2010, so it is 15 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 159 vehicles a day, roughly 4% of them trucks, projected to reach 235 by 2043. The structure is 24 ft (7.2 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesPleasant Pond Road
CrossesCollins Brook
Location1.53 Mi. RTE 47
CountyHillsborough County
StateNew Hampshire
Coordinates43.01689, -71.82216
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length24 ft (7.2 m)
Longest span22 ft (6.7 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic159 (2023)
Projected traffic235 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Pleasant Pond Road over Collins Brook built?

It was built in 2010, making it 15 years old in 2025.

What condition is Pleasant Pond Road over Collins 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 October 2024.

How much traffic does Pleasant Pond Road over Collins Brook carry?

About 159 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Pleasant Pond Road over Collins Brook?

The structure is 24 ft (7.2 m) long with a longest span of 22 ft (6.7 m) and a deck 30 ft wide.

Who owns Pleasant Pond Road over Collins Brook?

It is owned by the City or Municipal Highway Agency.