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)

SH 21

Good

Over: BOISE RIVER

NEAR DIVERSION DAM, Ada, ID

Built 1996 Load: 29.0 t ADT: 6,400

SMA 7343;CHERRY LN

Good

Over: TEN MILE CREEK

0.5 N. 3.5 W. MERIDIAN, Ada, ID

Built 1961 Load: 29.0 t ADT: 5,900

SMA 9793; MAIN ST

Good

Over: BOISE VRT CENTER

MAIN ST EAST OF 8TH ST, Ada, ID

Built 2016 Load: 30.1 t ADT: 6,000

STP 7073;COLE RD

Good

Over: RIDENBAUGH CANAL;COLE GS

0.7 W. BOISE WCL;COLE RD, Ada, ID

Built 1968 Load: 30.8 t ADT: 14,000

STC 3784;E KUNA RD

Good

Over: NEW YORK CANAL

3.4 E. KUNA, Ada, ID

Built 1977 Load: 31.8 t ADT: 2,600

S3760;FLTG FEATHER

Good

Over: MIDDLETON CANAL

1.0 N. 0.2 E. STAR, Ada, ID

Built 1988 Load: 32.7 t ADT: 4,400

SMA9243;VICTORY RD

Good

Over: CALKINS LATERAL

2.5 S 1.9 W MERIDIAN, Ada, ID

Built 2016 Load: 32.7 t ADT: 3,800

STC9573:E MALLARD

Good

Over: LOGGERS CREEK

IN BOISE; E.MALLARD DRIVE, Ada, ID

Built 2023 Load: 32.7 t ADT: 2,600

ESTHER SIMPLOT PK

Good

Over: ESTHERS POND

IN ESTHER SIMPLOT PARK, Ada, ID

Built 2016 Load: 34.3 t ADT: 80

SH 55

Good

Over: BOISE RIVER;N.CHANNEL

0.7 S. EAGLE, Ada, ID

Built 1978 Load: 34.5 t ADT: 40,500

I 84 WBL

Good

Over: NEW YORK CANAL

IN BOISE;NEAR ORCHARD ST., Ada, ID

Built 1968 Load: 36.3 t ADT: 44,500

SH 16

Good

Over: BOISE RIVER

1.3 E. STAR SCL, Ada, ID

Built 2014 Load: 36.9 t ADT: 19,500

I 84 EBL

Good

Over: NEW YORK CANAL

IN BOISE;NEAR ORCHARD ST., Ada, ID

Built 1968 Load: 39.0 t ADT: 44,500

STC 3856; FRANKLIN

Good

Over: FIVE MILE CREEK

IN MERIDIAN, Ada, ID

Built 2004 Load: 39.9 t ADT: 23,500

HANLEY PLACE

Good

Over: WILLOW CREEK

6.95 S. EMMETT, Ada, ID

Built 2023 Load: 41.1 t ADT: 40

SPRING CREEK WAY

Good

Over: DRY CREEK

DRY CREEK RANCH, Ada, ID

Built 2021 Load: 43.7 t ADT: 130

STP7220;STATE ST

Good

Over: FARMERS UNION CANAL

IN BOISE @ COLLISTER, Ada, ID

Built 2019 Load: 44.1 t ADT: 34,000

BETHEL STREET

Good

Over: RIDENBAUGH CANAL

IN BOISE, Ada, ID

Built 1998 Load: 45.4 t ADT: 1,000

GLASSFORD WAY

Good

Over: FIVE MILE CREEK

NW MERIDIAN CL, Ada, ID

Built 2020 Load: 50.2 t ADT: 25

ECHANOVE RD

Good

Over: CURRANT CREEK

IN BOISE;HIDDEN SPRINGS, Ada, ID

Built 2002 Load: 52.6 t ADT: 99

MYERS STREET

Good

Over: LOGGERS CREEK

IN BOISE;MYERS ST., Ada, ID

Built 1972 Load: 54.4 t ADT: 200

SMA9773;LINDER RD

Good

Over: RIDENBAUGH CANAL

2.2 S. 1.1 W. MERIDIAN, Ada, ID

Built 1992 Load: 55.3 t ADT: 4,600

STP7243;E PARK CTR

Good

Over: LOGGERS CREEK

EAST BOISE, Ada, ID

Built 2009 Load: 56.4 t ADT: 9,600

S. BAILEY WAY

Good

Over: TEN MILE CREEK

2.0 S. 0.7 E. MERIDIAN, Ada, ID

Built 2007 Load: 58.1 t ADT: 200

BARBER VALLEY DR

Good

Over: WALLING CREEK

SE BOISE, Ada, ID

Built 2018 Load: 58.6 t ADT: 5,500

BROOKSIDE LANE

Good

Over: DRY CREEK

2.0 N. 1.8 E. EAGLE, Ada, ID

Built 1994 Load: 59.9 t ADT: 250

N. GRAND LAKE WAY

Good

Over: FIVE MILE CREEK

3.45 N. MERIDIAN, Ada, ID

Built 2022 Load: 64.2 t ADT: 50

STC 7073;S.COLE RD

Good

Over: NEW YORK CANAL

ON S.COLE RD;0.3N.VALLEJO, Ada, ID

Built 1989 Load: 76.2 t ADT: 2,200

N. ECHOHAWK WAY

Good

Over: FARMERS UNION CANAL

IN EAGLE, Ada, ID

Built 1999 Load: 78.0 t ADT: 200

N FAWNRIDGE WAY

Good

Over: FIVE MILE CREEK

2.3 N 3.5 W. MERIDIAN, Ada, ID

Built 2022 Load: 97.2 t ADT: 100

E. BRANCHWOOD

Good

Over: SQUAW CREEK

IN BOISE, Ada, ID

Built 2001 Load: 99.9 t ADT: 400

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.