US Bridges

Low Gap Road over Masonite Industrial Road

PoorClosed to traffic

Mendocino County, California · 6.7 MI S Orr Springs Road · Structure no. 10C0136

Built
1960
65 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
100 ft
1 main span
Daily traffic
25
2007 count
Owner
County
County Highway Agency

About this bridge

Low Gap Road over Masonite Industrial Road is a wood or timber stringer/multi-beam or girder carrying Low Gap Road over Masonite Industrial Road in Mendocino County, California. It was built in 1960, so it is 65 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 0 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. Its operating status is: closed to all traffic.

It carries about 25 vehicles a day, projected to reach 34 by 2042. The structure is 100 ft (30.5 m) long and 22 ft wide. If it were closed, the detour would be 36.7 mi (59 km).

Location

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CarriesLow Gap Road
CrossesMasonite Industrial Road
Location6.7 MI S Orr Springs Road
RouteCounty Highway 0
CountyMendocino County
StateCalifornia
Coordinates39.17707, -123.41402
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure0 FailedOut of service and beyond corrective action.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourBridge not over waterway
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1 (+4 approach)
Design loadUnknown
Structure length100 ft (30.5 m)
Longest span36 ft (10.9 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2007)
Projected traffic34 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed36.7 mi (59 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$342,000 (2018 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Low Gap Road over Masonite Industrial Road built?

It was built in 1960, making it 65 years old in 2025.

What condition is Low Gap Road over Masonite Industrial Road 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 May 2024.

How much traffic does Low Gap Road over Masonite Industrial Road carry?

About 25 vehicles per day (2007 count).

How long is Low Gap Road over Masonite Industrial Road?

The structure is 100 ft (30.5 m) long with a longest span of 36 ft (10.9 m) and a deck 22 ft wide.

Who owns Low Gap Road over Masonite Industrial Road?

It is owned by the County Highway Agency.