US Bridges

Parade Hill Road over Suncook River

Fair

Belknap County, New Hampshire · 0.1 MI S RTE 28 · Structure no. 001400960007900

Built
1948
77 years old, rebuilt 2002
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
109 ft
2 main spans
Daily traffic
427
2023 count
Owner
State
State Highway Agency

About this bridge

Parade Hill Road over Suncook River is a steel stringer/multi-beam or girder carrying Parade Hill Road over Suncook River in Belknap County, New Hampshire. It was built in 1948 and reconstructed in 2002, so it is 77 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 427 vehicles a day, roughly 4% of them trucks, projected to reach 631 by 2043. The structure is 109 ft (33.2 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesParade Hill Road
CrossesSuncook River
Location0.1 MI S RTE 28
RouteState Highway 0
CountyBelknap County
StateNew Hampshire
Coordinates43.3314, -71.29196
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating39 US tons
Inventory rating23.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length109 ft (33.2 m)
Longest span75 ft (22.9 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic427 (2023)
Projected traffic631 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Parade Hill Road over Suncook River built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 2002.

What condition is Parade Hill Road over Suncook River 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 May 2024.

How much traffic does Parade Hill Road over Suncook River carry?

About 427 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Parade Hill Road over Suncook River?

The structure is 109 ft (33.2 m) long with a longest span of 75 ft (22.9 m) and a deck 27 ft wide.

Who owns Parade Hill Road over Suncook River?

It is owned by the State Highway Agency.