US Bridges

Lafayette Road over Ham Branch

Poor

Grafton County, New Hampshire · 0.12MI. RTE 116 · Structure no. 008700570008300

Built
1920
105 years old, rebuilt 1979
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
436
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lafayette Road over Ham Branch is a steel stringer/multi-beam or girder carrying Lafayette Road over Ham Branch in Grafton County, New Hampshire. It was built in 1920 and reconstructed in 1979, so it is 105 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 436 vehicles a day, roughly 4% of them trucks, projected to reach 645 by 2043. The structure is 52 ft (15.8 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLafayette Road
CrossesHam Branch
Location0.12MI. RTE 116
Coordinates44.20295, -71.75657
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 16 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.2 US tons
Inventory rating15.1 US tons

Structure

MaterialSteel
DeckOpen grating
Main spans1
Design loadUnknown
Structure length52 ft (15.8 m)
Longest span38 ft (11.6 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic436 (2023)
Projected traffic645 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Lafayette Road over Ham Branch built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1979.

What condition is Lafayette Road over Ham Branch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Lafayette Road over Ham Branch carry?

About 436 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Lafayette Road over Ham Branch?

The structure is 52 ft (15.8 m) long with a longest span of 38 ft (11.6 m) and a deck 22 ft wide.

Who owns Lafayette Road over Ham Branch?

It is owned by the City or Municipal Highway Agency.