US Bridges

990 South Road over T.F.Northside Main Cnl

Fair

Jerome County, Idaho · 1.4 S. 3.4 E. Hazelton · Structure no. 000000000024595

Built
1928
97 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete
Length
180 ft
4 main spans
Daily traffic
620
2023 count
Owner
Local
Other Local Agency

About this bridge

990 South Road over T.F.Northside Main Cnl is a concrete tee beam carrying 990 South Road over T.F.Northside Main Cnl in Jerome County, Idaho. It was built in 1928, so it is 97 years old, older 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 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 620 vehicles a day, roughly 19% of them trucks, projected to reach 930 by 2042. The structure is 180 ft (54.9 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries990 South Road
CrossesT.F.Northside Main Cnl
Location1.4 S. 3.4 E. Hazelton
RouteCounty Highway 0
CountyJerome County
StateIdaho
Coordinates42.57647, -114.05828
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length180 ft (54.9 m)
Longest span45 ft (13.7 m)
Deck width26 ft (8 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic620 (2023)
Projected traffic930 by 2042
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.8 million (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 990 South Road over T.F.Northside Main Cnl built?

It was built in 1928, making it 97 years old in 2025.

What condition is 990 South Road over T.F.Northside Main Cnl 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 March 2023.

How much traffic does 990 South Road over T.F.Northside Main Cnl carry?

About 620 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is 990 South Road over T.F.Northside Main Cnl?

The structure is 180 ft (54.9 m) long with a longest span of 45 ft (13.7 m) and a deck 26 ft wide.

Who owns 990 South Road over T.F.Northside Main Cnl?

It is owned by the Other Local Agency.