US Bridges

Crystal Lake Road over Suncook River

Fair

Belknap County, New Hampshire · 0.4 MI NW JCT Town ROAD94 · Structure no. 009201490006100

Built
1929
96 years old
Condition
Fair
inspected April 2024
Type
Frame
Concrete
Length
25 ft
1 main span
Daily traffic
1,261
2023 count
Owner
State
State Highway Agency

About this bridge

Crystal Lake Road over Suncook River is a concrete frame carrying Crystal Lake Road over Suncook River in Belknap County, New Hampshire. It was built in 1929, so it is 96 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 1,261 vehicles a day, roughly 4% of them trucks, projected to reach 1,866 by 2043. The structure is 25 ft (7.6 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCrystal Lake Road
CrossesSuncook River
Location0.4 MI NW JCT Town ROAD94
RouteState Highway 0
CountyBelknap County
StateNew Hampshire
Coordinates43.42509, -71.30633
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating69.1 US tons
Inventory rating43.7 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length25 ft (7.6 m)
Longest span21 ft (6.4 m)
Deck width28 ft (8.4 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,261 (2023)
Projected traffic1,866 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Crystal Lake Road over Suncook River built?

It was built in 1929, making it 96 years old in 2025.

What condition is Crystal Lake 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 April 2024.

How much traffic does Crystal Lake Road over Suncook River carry?

About 1,261 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Crystal Lake Road over Suncook River?

The structure is 25 ft (7.6 m) long with a longest span of 21 ft (6.4 m) and a deck 28 ft wide.

Who owns Crystal Lake Road over Suncook River?

It is owned by the State Highway Agency.