Ada County, ID

81 public highway bridges

Ada County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Ada County, Idaho contains 81 public highway bridges. Roughly 39.5% are rated “Good,” 45.7% “Fair,” and 0% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

81
Total Bridges
39.5%
Good
45.7%
Fair
0%
Poor Condition

Condition Distribution

Good
39.5% (32)
Fair
45.7% (37)
Poor
0% (0)

All Bridges (81)

US 30

Unknown

Over: I 184B WB-EB;FAIRVIEW RP

IN BOISE;FAIRVIEW RAMP, Ada, ID

Built 1968 ADT: 60,500

SH 69;MERIDIAN RD

Unknown

Over: I 84;SH 69 MERIDIAN IC

MERIDIAN SCL, Ada, ID

Built 2015 ADT: 137,000

I 84 EBL

Unknown

Over: KUNA RD; BLACKS CREEK RD

9.2 E. BOISE ECL, Ada, ID

Built 2020 ADT: 1,000

I 184 WBL CONNECTR

Unknown

Over: US 20-26;BOISE RV SLOUGH

IN BOISE;CHINDEN BLVD IC, Ada, ID

Built 1991 ADT: 5,500

US 20 26 RAMP

Unknown

Over: BOISE RVR SLOUGH;RAMP

BOISE;FAIRVIEW/CHINDEN IC, Ada, ID

Built 1991 ADT: 11,000

STP 9183;TEN MILE

Unknown

Over: TASA DRIVE

1.4 S 2.1 W. MERIDIAN, Ada, ID

Built 2011 ADT: 80

SMA 7113;CURTIS RD

Unknown

Over: I 184B;CURTIS RD IC

IN BOISE;CURTIS ROAD, Ada, ID

Built 1968 ADT: 78,000

STP8973;ORCHARD ST

Unknown

Over: I 84 EB-WB;ORCHARD ST IC

IN BOISE; ORCHARD ST, Ada, ID

Built 2010 ADT: 92,500

STP 7343;MAIN ST.

Unknown

Over: US 20-26 CHINDEN BLVD

IN BOISE; GARDEN CITY CL, Ada, ID

Built 1991 ADT: 22,500

SMA9783;LOCUST GRV

Unknown

Over: I 84;LOCUST GROVE GS

1.8 SE MERIDIAN, Ada, ID

Built 2008 ADT: 137,000

W.AIRPORT WAY-DEPT

Unknown

Over: W.AIRPORT WAY-ARRIVAL

AT BOISE AIRPORT, Ada, ID

Built 2004 ADT: 4,000

SH 16

Unknown

Over: W.JOPLIN CT;EUREKA CANAL

0.8 S 1.25 E STAR SCL, Ada, ID

Built 2014 ADT: 300

STC3024;POLLARD LN

Fair

Over: MIDDLETON CANAL

0.6 N. 1.3 E. STAR, Ada, ID

Built 1967 Load: 3.6 t ADT: 1,300

SMA3343;COLUMBIA

Fair

Over: RAWSON CANAL

2.8 N 3.3 E KUNA, Ada, ID

Built 1976 Load: 16.3 t ADT: 3,400

SMA 7563;OVERLAND

Fair

Over: TEN MILE CREEK

1.0 S. 0.1 E. MERIDIAN, Ada, ID

Built 1986 Load: 20.9 t ADT: 24,000

ASPEN COVE

Fair

Over: RIDENBAUGH CANAL

1.9 S. 1.2 W. MERIDIAN, Ada, ID

Built 1974 Load: 20.9 t ADT: 390

STC 9203;BARRISTER

Fair

Over: RIDENBAUGH CANAL

IN BOISE;BARRISTER DR., Ada, ID

Built 1978 Load: 20.9 t ADT: 6,200

WALTMAN LANE

Fair

Over: TEN MILE CREEK

0.9 S. 0.4 W. MERIDIAN, Ada, ID

Built 1965 Load: 20.9 t ADT: 80

S3760;FLTG FEATHER

Fair

Over: MIDDLETON CANAL

1.0 N. STAR, Ada, ID

Built 1994 Load: 20.9 t ADT: 4,800

STC 7483;MCDERMOTT

Fair

Over: RIDENBAUGH CANAL

1.8 S. 4.1 W. MERIDIAN, Ada, ID

Built 1969 Load: 20.9 t ADT: 590

S3784;LOCUST GROVE

Fair

Over: RAWSON CANAL

5.3 S. 0.8 E. MERIDIAN, Ada, ID

Built 1973 Load: 25.2 t ADT: 1,500

NHS 7433;VISTA AVE

Fair

Over: NEW YORK CANAL

IN BOISE;VISTA AVE., Ada, ID

Built 1973 Load: 26.3 t ADT: 27,000

SMA3778;DRY CRK RD

Fair

Over: DRY CREEK

HIDDEN SPRINGS, Ada, ID

Built 2006 Load: 26.3 t ADT: 1,600

STC3761;PLUMMER RD

Fair

Over: MIDDLETON CANAL

0.3 N. 1.0 E. STAR, Ada, ID

Built 1971 Load: 28.1 t ADT: 3,200

SMA 9833;MILWAUKEE

Fair

Over: RIDENBAUGH CANAL

IN BOISE;MILWAUKEE ST, Ada, ID

Built 1979 Load: 28.1 t ADT: 21,000

SMA 7363;EMERALD

Fair

Over: RIDENBAUGH CANAL

IN BOISE;EMERALD ST, Ada, ID

Built 1979 Load: 28.1 t ADT: 16,500

I 84 WBL

Fair

Over: INDIAN CREEK

15.9 E. BOISE ECL, Ada, ID

Built 1960 Load: 29.0 t ADT: 14,750

SMA7013;CLOVERDALE

Fair

Over: RIDENBAUGH CANAL

2.1 S. 2.8 E. MERIDIAN, Ada, ID

Built 1969 Load: 29.0 t ADT: 13,000

STC 3770;STAR RD

Fair

Over: BOISE RIVER(STAR BRIDGE)

0.8 S. STAR, Ada, ID

Built 1982 Load: 30.8 t ADT: 11,000

SMA 7030;STATE ST

Fair

Over: DRY CREEK

AT EAGLE WCL, Ada, ID

Built 1959 Load: 31.8 t ADT: 4,700

STC 3770;STAR RD

Fair

Over: PHYLLIS CANAL

1.8 S. STAR, Ada, ID

Built 1967 Load: 31.8 t ADT: 11,000

COLUMBIA ROAD

Fair

Over: MASON CREEK FEEDER CANAL

2.8 N. 0.8 E. KUNA, Ada, ID

Built 1989 Load: 33.6 t ADT: 5,100

SH 69

Fair

Over: RAWSON CANAL

4.0 S. MERIDIAN, Ada, ID

Built 1990 Load: 35.4 t ADT: 32,000

SMA 7113; CURTIS

Fair

Over: SETTLERS CANAL

IN BOISE, Ada, ID

Built 2000 Load: 35.4 t ADT: 28,000

STP3728;LAKE HAZEL

Fair

Over: RIDENBAUGH HIGH LINE CNL

3.7 N. 1.6 W. KUNA, Ada, ID

Built 1992 Load: 37.2 t ADT: 1,900

I 84

Fair

Over: TEN MILE CREEK

0.5 W. MERIDIAN, Ada, ID

Built 1965 Load: 38.1 t ADT: 125,500

STP7243;E PARK CTR

Fair

Over: BOISE RIVER

EAST BOISE, Ada, ID

Built 2009 Load: 41.7 t ADT: 9,600

STC 9623;W. WRIGHT

Fair

Over: NEW YORK CANAL

IN BOISE;W.WRIGHT ST, Ada, ID

Built 1989 Load: 42.6 t ADT: 6,200

SH 55

Fair

Over: DRY CREEK

8.1 NW BOISE WCL, Ada, ID

Built 1997 Load: 44.5 t ADT: 13,500

STC 7023;EDGEWOOD

Fair

Over: DRY CREEK CANAL

0.1N 1.2E Eagle, Ada, ID

Built 2015 Load: 46.0 t ADT: 2,400

SH 69

Fair

Over: TEN MILE CREEK

1.0 S. MERIDIAN, Ada, ID

Built 1963 Load: 46.3 t ADT: 47,000

DICKMAN ROAD

Fair

Over: WALDVOGEL CANAL

5.7 S. 4.3 W. KUNA, Ada, ID

Built 1950 Load: 48.6 t ADT: 200

ROBINSON ROAD

Fair

Over: WALDVOGEL CANAL

4.4 S. 3.7 W. KUNA, Ada, ID

Built 1997 Load: 49.0 t ADT: 200

SMA7013;CLOVERDALE

Fair

Over: RIDENBAUGH CANAL

3.0 E. MERIDIAN, Ada, ID

Built 1992 Load: 51.7 t ADT: 19,000

PHILLIPPI ST

Fair

Over: RIDENBAUGH CANAL

IN BOISE, Ada, ID

Built 1992 Load: 53.5 t ADT: 1,600

SMA 7603;BOISE AVE

Fair

Over: RIDENBAUGH CANAL

IN BOISE ON BOISE AVENUE, Ada, ID

Built 1988 Load: 54.4 t ADT: 5,800

ALPINE STEET

Fair

Over: ELEC LGHT SWITCH LATERAL

IN BOISE, Ada, ID

Built 1970 Load: 73.5 t ADT: 960

SMA 9183;TEN MILE

Fair

Over: RIDENBAUGH CANAL

0.3 S. OVERLAND-TEN MILE, Ada, ID

Built 1993 Load: 78.9 t ADT: 18,500

STP 3794;EAGLE RD

Fair

Over: FARR LATERAL CANAL

3.4 N. 3.3 E. KUNA, Ada, ID

Built 1993 Load: 99.9 t ADT: 1,900

SMA 7143;USTICK RD

Good

Over: NORTH SLOUGH

IN BOISE, Ada, ID

Built 2014 Load: 27.5 t ADT: 16,000

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.