US Bridges

Sma 9773;LINDER RD over Boise R;middle Channel

Fair

Ada County, Idaho · 1.2 S. 3.0 W. Eagle · Structure no. 000000000019791

Built
1991
34 years old
Condition
Fair
inspected February 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
22,000
2023 count
Owner
County
County Highway Agency

About this bridge

Sma 9773;LINDER RD over Boise R;middle Channel is a prestressed concrete box beam or girders - multiple carrying Sma 9773;LINDER RD over Boise R;middle Channel in Ada County, Idaho. It was built in 1991, so it is 34 years old, younger than the Idaho average of 45.3 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 22,000 vehicles a day, roughly 5% of them trucks, projected to reach 33,000 by 2042. The structure is 49 ft (14.9 m) long and 52 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSma 9773;LINDER RD
CrossesBoise R;middle Channel
Location1.2 S. 3.0 W. Eagle
RouteCounty Highway 9773
CountyAda County
StateIdaho
Coordinates43.67973, -116.41367
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating41 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length49 ft (14.9 m)
Longest span45 ft (13.7 m)
Deck width52 ft (15.8 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,000 (2023)
Projected traffic33,000 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sma 9773;LINDER RD over Boise R;middle Channel built?

It was built in 1991, making it 34 years old in 2025.

What condition is Sma 9773;LINDER RD over Boise R;middle Channel 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 February 2022.

How much traffic does Sma 9773;LINDER RD over Boise R;middle Channel carry?

About 22,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Sma 9773;LINDER RD over Boise R;middle Channel?

The structure is 49 ft (14.9 m) long with a longest span of 45 ft (13.7 m) and a deck 52 ft wide.

Who owns Sma 9773;LINDER RD over Boise R;middle Channel?

It is owned by the County Highway Agency.