US Bridges

Cascade Street over Sl&arr

Good

Coos County, New Hampshire · At Berlin Gorham Tl · Structure no. 002302250003800

Built
1999
26 years old
Condition
Good
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
510
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Cascade Street over Sl&arr is a prestressed concrete box beam or girders - multiple carrying Cascade Street over Sl&arr in Coos 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 510 vehicles a day, roughly 4% of them trucks, projected to reach 754 by 2043. The structure is 37 ft (11.2 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCascade Street
CrossesSl&arr
LocationAt Berlin Gorham Tl
RouteCity Street 0
Coordinates44.44948, -71.19013
Functional classUrban 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.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating69 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length37 ft (11.2 m)
Longest span35 ft (10.6 m)
Deck width40 ft (12.3 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic510 (2023)
Projected traffic754 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Cascade Street over Sl&arr built?

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

What condition is Cascade Street over Sl&arr 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 August 2024.

How much traffic does Cascade Street over Sl&arr carry?

About 510 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Cascade Street over Sl&arr?

The structure is 37 ft (11.2 m) long with a longest span of 35 ft (10.6 m) and a deck 40 ft wide.

Who owns Cascade Street over Sl&arr?

It is owned by the City or Municipal Highway Agency.