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Boise River at Eagle Island

Highest listed crest 11.93 ftFlood stage 10.1 ft22 crests since 1982

The Boise River at Eagle Island crested above flood stage 13 times among the 22 crests the National Weather Service lists from 1982 to 2019. The highest, 11.93 ft on June 6, 2017, was minor flooding, 1.83 feet above flood stage. 1 other gauge on the Boise River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest
11.93 ft
June 6, 2017; 9,590 cubic feet per second
Flood stage
10.1 ft
Major flooding from 12.9 ft
Crests at major
0
13 above flood stage
Most recent flood crest
June 6, 2017
11.93 ft, minor flooding
Location
Ada County
Near Garden City (0.7 mi), Eagle (5.4 mi), Meridian (6.2 mi)
Identifiers
NWS EAGI1
No USGS station

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Boise River at Eagle Island
Action stage9.76May 6, 2019The level at which the NWS or its partners begin to take action
Flood stage (minor)10.113Jun 6, 2017Minimal or no property damage, but possibly some public threat
Moderate flood stage12.70—Some inundation of structures and roads near the stream
Major flood stage12.90—Extensive inundation of structures and roads

Every listed crest

22 crests from 1982 to 2019. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Boise River at Eagle Island, 1982 to 2019 68101214ft Flood stage 10.1 ftMajor 12.9 ft Jun 29, 1982: 10.54 ft, minor flooding; 7,630 cubic feet per secondJun 6, 1983: 10.47 ft, minor flooding; 7,564 cubic feet per secondJun 13, 1983: 11.54 ft, minor flooding; 9,840 cubic feet per secondMay 29, 1984: 10.37 ft, minor flooding; 6,950 cubic feet per secondJun 7, 1986: 10.61 ft, minor flooding; 8,030 cubic feet per secondMay 23, 1993: 10.24 ft, minor flooding; 6,730 cubic feet per secondMar 15, 1996: 10.19 ft, minor flooding; 6,870 cubic feet per secondMar 27, 1997: 10.52 ft, minor flooding; 7,300 cubic feet per secondMay 31, 1998: 11.10 ft, minor flooding; 8,350 cubic feet per secondApr 30, 2006: 10.65 ft, minor flooding; 7,440 cubic feet per secondMay 20, 2008: 10.56 ft, minor flooding; 7,270 cubic feet per secondJun 7, 2009: 9.84 ft, action stage; 6,320 cubic feet per secondJun 11, 2010: 9.72 ft, action stage; 6,180 cubic feet per secondMay 18, 2011: 10.07 ft, action stage; 7,230 cubic feet per secondMay 5, 2012: 10.93 ft, minor flooding; 8,310 cubic feet per secondMay 21, 2013: 6.39 ft, below flood stage; 1,520 cubic feet per secondApr 9, 2014: 6.68 ft, below flood stage; 2,040 cubic feet per secondMay 19, 2015: 6.42 ft, below flood stage; 1,770 cubic feet per secondApr 11, 2016: 9.98 ft, action stage; 6,420 cubic feet per secondJun 6, 2017: 11.93 ft, minor flooding; 9,590 cubic feet per secondMay 28, 2018: 9.71 ft, action stage; 6,520 cubic feet per secondMay 6, 2019: 10.01 ft, action stage; 7,340 cubic feet per second Highest, 11.93 ft, Jun 6, 2017 1990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Boise River at Eagle Island 1980s: 5 5 1990s: 4 2000s: 2 2010s: 2 1980s1990s2000s2010s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Boise River at Eagle Island
1Jun 6, 201711.93+1.83Minor9,590
2Jun 13, 198311.54+1.44Minor9,840
3May 31, 199811.10+1.00Minor8,350
4May 5, 201210.93+0.83Minor8,310
5Apr 30, 200610.65+0.55Minor7,440
6Jun 7, 198610.61+0.51Minor8,030
7May 20, 200810.56+0.46Minor7,270
8Jun 29, 198210.54+0.44Minor7,630
9Mar 27, 199710.52+0.42Minor7,300
10Jun 6, 198310.47+0.37Minor7,564
11May 29, 198410.37+0.27Minor6,950
12May 23, 199310.24+0.14Minor6,730
13Mar 15, 199610.19+0.09Minor6,870
14May 18, 201110.07−0.03Action7,230
15May 6, 201910.01−0.09Action7,340
16Apr 11, 20169.98−0.12Action6,420
17Jun 7, 20099.84−0.26Action6,320
18Jun 11, 20109.72−0.38Action6,180
19May 28, 20189.71−0.39Action6,520
20Apr 9, 20146.68−3.42Below flood stage2,040
21May 19, 20156.42−3.68Below flood stage1,770
22May 21, 20136.39−3.71Below flood stage1,520

The worst floods along the Boise River

For this gauge's highest crests, the other gauges on the Boise River that crested above flood stage within a week.

June 6, 2017: 11.93 ft here, minor flooding

June 13, 1983: 11.54 ft here, minor flooding

May 31, 1998: 11.10 ft here, minor flooding

Gauges on the Boise River

Flood gauges sharing the river's name, linked within 80 miles of one another.

Flood gauges on the Boise River
Boise (Glenwood Bridge)ID10.111.93 ft, Jun 6, 20170
Eagle Island this gaugeID10.111.93 ft, Jun 6, 20170

Other gauges in Ada County

Flood gauges in Ada County
Boise (Glenwood Bridge)10.111.93 ft, Jun 6, 20170

Ada County: every hazard · River floods across the country · Idaho

NOAA National Water Prediction Service, gauge EAGI1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.