US Bridges

NH120 Park Lot Ped over Nhrr(abd)

Poor

Grafton County, New Hampshire · .1 MI from JCT RTE 4 · Structure no. 014401210011700

Built
1969
56 years old
Condition
Poor
inspected July 2024
Type
Slab
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
5,317
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

NH120 Park Lot Ped over Nhrr(abd) is a prestressed concrete slab carrying NH120 Park Lot Ped over Nhrr(abd) in Grafton County, New Hampshire. It was built in 1969, so it is 56 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5,317 vehicles a day, roughly 5% of them trucks, projected to reach 7,869 by 2043. The structure is 28 ft (8.5 m) long and 61 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNH120 Park Lot Ped
CrossesNhrr(abd)
Location.1 MI from JCT RTE 4
RouteState Highway 120
CountyGrafton County
StateNew Hampshire
Coordinates43.64256, -72.2542
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 16 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.9 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width61 ft (18.7 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,317 (2023)
Projected traffic7,869 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesPedestrian / bicycle
Detour if closed5 mi (8 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NH120 Park Lot Ped over Nhrr(abd) built?

It was built in 1969, making it 56 years old in 2025.

What condition is NH120 Park Lot Ped over Nhrr(abd) in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does NH120 Park Lot Ped over Nhrr(abd) carry?

About 5,317 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is NH120 Park Lot Ped over Nhrr(abd)?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 61 ft wide.

Who owns NH120 Park Lot Ped over Nhrr(abd)?

It is owned by the City or Municipal Highway Agency.