US Bridges

Kellys Corner Road over Sanborn Brook

Fair

Merrimack County, New Hampshire · 0.5MI. NH28 · Structure no. 004601500015400

Built
1991
34 years old
Condition
Fair
inspected October 2024
Type
Slab
Wood or Timber
Length
28 ft
1 main span
Daily traffic
477
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Kellys Corner Road over Sanborn Brook is a wood or timber slab carrying Kellys Corner Road over Sanborn Brook in Merrimack County, New Hampshire. It was built in 1991, so it is 34 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 477 vehicles a day, roughly 4% of them trucks, projected to reach 705 by 2043. The structure is 28 ft (8.5 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesKellys Corner Road
CrossesSanborn Brook
Location0.5MI. NH28
CountyMerrimack County
StateNew Hampshire
Coordinates43.29132, -71.3603
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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
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 rating89.1 US tons
Inventory rating63.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic477 (2023)
Projected traffic705 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 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 Kellys Corner Road over Sanborn Brook built?

It was built in 1991, making it 34 years old in 2025.

What condition is Kellys Corner Road over Sanborn 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 Kellys Corner Road over Sanborn Brook carry?

About 477 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Kellys Corner Road over Sanborn Brook?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 28 ft wide.

Who owns Kellys Corner Road over Sanborn Brook?

It is owned by the City or Municipal Highway Agency.