US Bridges

Cotton Road over Lamprey River

Fair

Rockingham County, New Hampshire · 0.05 Mi. RTE 107 · Structure no. 006001610002300

Built
1986
39 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
85 ft
1 main span
Daily traffic
762
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Cotton Road over Lamprey River is a steel stringer/multi-beam or girder carrying Cotton Road over Lamprey River in Rockingham County, New Hampshire. It was built in 1986, so it is 39 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 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 762 vehicles a day, roughly 4% of them trucks, projected to reach 1,127 by 2043. The structure is 85 ft (25.9 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCotton Road
CrossesLamprey River
Location0.05 Mi. RTE 107
CountyRockingham County
StateNew Hampshire
Coordinates43.08735, -71.23431
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83.7 US tons
Inventory rating50.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length85 ft (25.9 m)
Longest span80 ft (24.4 m)
Deck width31 ft (9.3 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic762 (2023)
Projected traffic1,127 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cotton Road over Lamprey River built?

It was built in 1986, making it 39 years old in 2025.

What condition is Cotton Road over Lamprey 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 September 2023.

How much traffic does Cotton Road over Lamprey River carry?

About 762 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Cotton Road over Lamprey River?

The structure is 85 ft (25.9 m) long with a longest span of 80 ft (24.4 m) and a deck 31 ft wide.

Who owns Cotton Road over Lamprey River?

It is owned by the City or Municipal Highway Agency.