US Bridges

No Data Entered over Mod

Fair

Ketchikan Gateway Borough, Alaska · Gravina · Structure no. 100510000001060

Built
1990
35 years old, rebuilt 2006
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
10
2006 count
Owner
Federal
U.S. Forest Service

About this bridge

No Data Entered over Mod is a steel stringer/multi-beam or girder carrying No Data Entered over Mod in Ketchikan Gateway Borough, Alaska. It was built in 1990 and reconstructed in 2006, so it is 35 years old, younger than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 10 vehicles a day. The structure is 40 ft (12.2 m) long and 18 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesNo Data Entered
CrossesMod
LocationGravina
RouteState Highway SELEY
CountyKetchikan Gateway Borough
StateAlaska
Coordinates55.34121, -131.74292
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadOther
Structure length40 ft (12.2 m)
Longest span39 ft (11.8 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2006)
Projected traffic—
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$220,000
NavigationNo navigation control on waterway

Frequently asked questions

When was No Data Entered over Mod built?

It was built in 1990, making it 35 years old in 2025. It was reconstructed in 2006.

What condition is No Data Entered over Mod 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 No Data Entered over Mod carry?

About 10 vehicles per day (2006 count).

How long is No Data Entered over Mod?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.8 m) and a deck 18 ft wide.

Who owns No Data Entered over Mod?

It is owned by the U.S. Forest Service.