US Bridges

Cooledge Road over Shedd Brook

Fair

Hillsborough County, New Hampshire · 1.2 Mi. Rte. 31 · Structure no. 012200610010200

Built
1956
69 years old
Condition
Fair
inspected October 2024
Type
Frame
Concrete
Length
29 ft
1 main span
Daily traffic
348
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Cooledge Road over Shedd Brook is a concrete frame carrying Cooledge Road over Shedd Brook in Hillsborough County, New Hampshire. It was built in 1956, so it is 69 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 6 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 348 vehicles a day, roughly 4% of them trucks, projected to reach 515 by 2043. The structure is 29 ft (8.8 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCooledge Road
CrossesShedd Brook
Location1.2 Mi. Rte. 31
CountyHillsborough County
StateNew Hampshire
Coordinates43.14599, -71.98773
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating20 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length29 ft (8.8 m)
Longest span25 ft (7.6 m)
Deck width24 ft (7.3 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic348 (2023)
Projected traffic515 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cooledge Road over Shedd Brook built?

It was built in 1956, making it 69 years old in 2025.

What condition is Cooledge Road over Shedd Brook 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 October 2024.

How much traffic does Cooledge Road over Shedd Brook carry?

About 348 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Cooledge Road over Shedd Brook?

The structure is 29 ft (8.8 m) long with a longest span of 25 ft (7.6 m) and a deck 24 ft wide.

Who owns Cooledge Road over Shedd Brook?

It is owned by the City or Municipal Highway Agency.