US Bridges

Walker Street over Piscataqua R Back Chan

Fair

Rockingham County, New Hampshire · 200 M SE of SR103 · Structure no. 1NH0BR1

Built
1913
112 years old, rebuilt 2015
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
300 ft
4 main spans
Daily traffic
7,000
2011 count
Owner
Federal
Navy / Marines

About this bridge

Walker Street over Piscataqua R Back Chan is a steel stringer/multi-beam or girder carrying Walker Street over Piscataqua R Back Chan in Rockingham County, New Hampshire. It was built in 1913 and reconstructed in 2015, so it is 112 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 7,000 vehicles a day, roughly 10% of them trucks, projected to reach 8,000 by 2043. The structure is 300 ft (91.4 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesWalker Street
CrossesPiscataqua R Back Chan
Location200 M SE of SR103
Coordinates43.08483, -70.74141
Functional classUrban 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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating82.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length300 ft (91.4 m)
Longest span75 ft (22.9 m)
Deck width51 ft (15.4 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2011)
Projected traffic8,000 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and railroad
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerNavy / Marines
Maintained byNavy / Marines
Historic statusEligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$64,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Walker Street over Piscataqua R Back Chan built?

It was built in 1913, making it 112 years old in 2025. It was reconstructed in 2015.

What condition is Walker Street over Piscataqua R Back Chan 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 August 2023.

How much traffic does Walker Street over Piscataqua R Back Chan carry?

About 7,000 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is Walker Street over Piscataqua R Back Chan?

The structure is 300 ft (91.4 m) long with a longest span of 75 ft (22.9 m) and a deck 51 ft wide.

Who owns Walker Street over Piscataqua R Back Chan?

It is owned by the Navy / Marines.