US Bridges

Norris Lane over Irrigation Canal

Poor

Jefferson County, Oregon · 0.4 MI W of HWY 97 · Structure no. 31C48 726 00039

Built
1950
75 years old, rebuilt 1970
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
116 ft
4 main spans
Daily traffic
44
2020 count
Owner
County
County Highway Agency

About this bridge

Norris Lane over Irrigation Canal is a wood or timber stringer/multi-beam or girder carrying Norris Lane over Irrigation Canal in Jefferson County, Oregon. It was built in 1950 and reconstructed in 1970, so it is 75 years old, older than the Oregon average of 49.9 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. Its operating status is: open, posting recommended but not legally implemented.

It carries about 44 vehicles a day, roughly 10% of them trucks, projected to reach 49 by 2025. The structure is 116 ft (35.4 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNorris Lane
CrossesIrrigation Canal
Location0.4 MI W of HWY 97
RouteCounty Highway 0
StateOregon
Coordinates44.44825, -121.20733
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
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusOpen, posting recommended but not legally implemented
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating15.3 US tons
Inventory rating11.8 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 20
Structure length116 ft (35.4 m)
Longest span29 ft (8.8 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44 (2020)
Projected traffic49 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Norris Lane over Irrigation Canal built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1970.

What condition is Norris Lane over Irrigation Canal 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 November 2024.

How much traffic does Norris Lane over Irrigation Canal carry?

About 44 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Norris Lane over Irrigation Canal?

The structure is 116 ft (35.4 m) long with a longest span of 29 ft (8.8 m) and a deck 24 ft wide.

Who owns Norris Lane over Irrigation Canal?

It is owned by the County Highway Agency.