US Bridges

SMA3778;DRY Crk RD over Dry Creek

Fair

Ada County, Idaho · Hidden Springs · Structure no. 000000000025757

Built
2006
19 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
29 ft
1 main span
Daily traffic
1,500
2023 count
Owner
County
County Highway Agency

About this bridge

SMA3778;DRY Crk RD over Dry Creek is a concrete culvert carrying SMA3778;DRY Crk RD over Dry Creek in Ada County, Idaho. It was built in 2006, so it is 19 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 1,500 vehicles a day, roughly 3% of them trucks, projected to reach 2,250 by 2042. The structure is 29 ft (8.8 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSMA3778;DRY Crk RD
CrossesDry Creek
LocationHidden Springs
RouteCounty Highway 3778
StateIdaho
Coordinates43.72775, -116.25367
Functional classRural 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length29 ft (8.8 m)
Longest span29 ft (8.8 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2023)
Projected traffic2,250 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 SMA3778;DRY Crk RD over Dry Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is SMA3778;DRY Crk RD over Dry Creek 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 SMA3778;DRY Crk RD over Dry Creek carry?

About 1,500 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is SMA3778;DRY Crk RD over Dry Creek?

The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m) and a deck 36 ft wide.

Who owns SMA3778;DRY Crk RD over Dry Creek?

It is owned by the County Highway Agency.