US Bridges

N. Humphreys Way over Dry Creek

Good

Ada County, Idaho · Hidden Springs;boise · Structure no. 000000000025763

Built
2005
20 years old
Condition
Good
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

N. Humphreys Way over Dry Creek is a prestressed concrete box beam or girders - multiple carrying N. Humphreys Way over Dry Creek in Ada County, Idaho. It was built in 2005, so it is 20 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 200 vehicles a day, roughly 5% of them trucks, projected to reach 300 by 2039. The structure is 34 ft (10.4 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesN. Humphreys Way
CrossesDry Creek
LocationHidden Springs;boise
RouteCounty Highway 0
StateIdaho
Coordinates43.72192, -116.24689
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating94 US tons
Inventory rating55 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length34 ft (10.4 m)
Longest span33 ft (10.1 m)
Deck width36 ft (11 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic300 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N. Humphreys Way over Dry Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is N. Humphreys Way over Dry Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does N. Humphreys Way over Dry Creek carry?

About 200 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is N. Humphreys Way over Dry Creek?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10.1 m) and a deck 36 ft wide.

Who owns N. Humphreys Way over Dry Creek?

It is owned by the County Highway Agency.