US Bridges

Morrison Road over Contoocook River

Fair

Hillsborough County, New Hampshire · 0.8 MI FR Old Sharon RD9 · Structure no. 020800810006900

Built
1958
67 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
77 ft
1 main span
Daily traffic
1,064
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Morrison Road over Contoocook River is a steel stringer/multi-beam or girder carrying Morrison Road over Contoocook River in Hillsborough County, New Hampshire. It was built in 1958, so it is 67 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 1,064 vehicles a day, roughly 4% of them trucks, projected to reach 1,574 by 2043. The structure is 77 ft (23.5 m) long and 21 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMorrison Road
CrossesContoocook River
Location0.8 MI FR Old Sharon RD9
CountyHillsborough County
StateNew Hampshire
Coordinates42.86316, -71.95657
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length77 ft (23.5 m)
Longest span73 ft (22.3 m)
Deck width21 ft (6.4 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,064 (2023)
Projected traffic1,574 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 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 Morrison Road over Contoocook River built?

It was built in 1958, making it 67 years old in 2025.

What condition is Morrison Road over Contoocook 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 July 2023.

How much traffic does Morrison Road over Contoocook River carry?

About 1,064 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Morrison Road over Contoocook River?

The structure is 77 ft (23.5 m) long with a longest span of 73 ft (22.3 m) and a deck 21 ft wide.

Who owns Morrison Road over Contoocook River?

It is owned by the City or Municipal Highway Agency.