Phoenix Dam #2A - ID # 8907

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Page Last Updated: 04 November 2025

ID History | Site Data | Brief Rating | Water Year Peaks | Impound History

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GAGE ID AND DATUM HISTORY

ID Elevation of
Instrument
in Gage Height		 Elevation of
Instrument
in Datum		 Period
       
8907 0.00 feet 1,393.62 feet NAVD88 03/25/2020 -- Current
4789 0.00 feet 1,393.62 feet NAVD88 06/29/2009 -- 03/25/2020
4789 0.00 feet 1,391.50 feet M.S.L. 06/29/2009 -- 03/25/2020

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SITE DATA

STATUS Active
LOCATION On 7th Street south of Thunderbird Road
DRAINAGE AREA 0.47 mi2
STREAM TYPE Dam of natural drainage
JURISDICTION Phoenix, Arizona
WATERSHED Upper ACDC
SECTION/TOWNSHIP/RANGE S16 T3N R3E
LATITUDE N 33° 36' 13.2"  |  +33.60366
LONGITUDE W 112° 03' 52.8"  |  -112.06466
ARIZONA STATE PLANE E 654947  | N 947202
USGS QUAD SHEET Sunnyslope 7.5-Minute
STREAMGAGE INSTALLATION DATE 06/29/2009 - WY 2009
PERIOD OF AVAILABLE DATA RECORD 06/29/2009 - Current
LENGTH OF AVAILABLE DATA RECORD (AS OF 10/01/2024) 15.26 Years | 5,573 Days
GAPS (> 2 DAYS) IN RECORD None
STAGE GAGE TYPE Pressure Transducer
STAGE GAGE ELEVATION 0.00 feet Gage Height
STAFF GAGES 0
CREST STAGE GAGES 0
ZERO GAGE HEIGHT ELEVATION 1,393.62 feet NAVD88
POINT OF ZERO FLOW 0.00 feet Gage Height
SPILLWAY ELEVATION 16.5 feet Gage Height
TOP OF DAM ELEVATION 22.5 feet Gage Height

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BRIEF RATING

Current Discharge Rating = #1 - Applied since 06/29/2009
Current Capacity Rating = #2 - Applied since 10/12/2025
Gage
Height
(feet)		 Elevation
(feet NAVD88)		 Discharge
(cfs)		 Volume
(acre-feet)
0.00 1,393.62 0 0.0
1.40 1,395.02 4 0.0
3.40 1,397.02 17 0.1
8.40 1,402.02 26 3.2
10.40 1,404.02 28 8.2
12.40 1,406.02 32 16.5
16.30 1,409.92 35 45.1
17.40 1,411.02 271 56.8
18.40 1,412.02 710 68.8
20.40 1,414.02 1,989 96.0
21.90 1,415.52 3,731 119.3

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WATER YEAR PEAKS

Water
Year		 Peak
Gage Height
(feet)		 Peak
Volume
(acre-feet)		 Percent
Full
(Available Storage Capacity)		 Date of
Peak
2026        
2025 6.38 9.3 15.6 09/03/2025
2024 4.15 6.5 11.1 04/01/2024
2023 3.3 5.3 8.8 03/01/2023
2022 10.67 19.0 31.7 07/30/2022
2021 10.37 17.6 29.4 08/13/2021
2020 8.32 12.1 20.3 03/13/2020
2019 10.34 17.6 29.3 10/07/2018
2018 9.59 15.5 25.8 08/23/2018
2017 6.51 9.5 15.9 12/22/2016
2016 10.10 16.9 28.2 08/05/2016
2015 3.48 5.5 9.2 05/15/2015
2014 11.50 23.5 39.2 09/08/2014
2013 4.70 7.1 11.9 07/19/2013
2012 5.00 7.5 12.5 09/07/2012
2011 4.95 7.4 12.3 10/05/2010
2010 4.55 6.9 11.5 01/21/2010
2009 (partial) 5.15 7.7 7.7 09/05/2009

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IMPOUNDMENT EVENT HISTORY

Date of
Peak		 Time of
Peak		 Runoff
Start		 Runoff
End		 Duration
(hours)		 Peak
Stage
(feet GH)		 Peak
Volume
(acre-feet)		 Water
Year
View a Plot of These Data
               
09/27/2025 19:17 09/27/2025 18:00 09/28/2025 00:00 6.0 4.09 2.8 2025
09/26/2025 14:18 09/26/2025 12:00 09/26/2025 18:00 6.0 5.43 8.1 2025
09/03/2025 23:41 09/03/2025 23:00 09/04/2025 01:00 2.0 6.38 9.3 2025
08/26/2025 21:58 08/26/2025 21:00 08/27/2025 00:00 3.0 3.03 5.0 2025
06/02/2025 03:43 06/02/2025 03:00 06/02/2025 04:33 1.5 0.75 1.6 2025
08/18/2024 03:28 08/18/2024 00:00 08/18/2024 05:51 5.9 1.27 2.8 2024
04/01/2024 04:01 03/31/2024 06:00 04/01/2024 07:55 25.9 4.15 6.5 2024
01/23/2024 09:06 01/23/2024 06:00 01/23/2024 13:33 4.6 0.74 1.6 2024
12/22/2023 20:09 12/22/2023 18:00 12/23/2023 00:00 6.0 2.06 3.9 2024
11/18/2023 06:45 11/18/2023 06:30 11/18/2023 07:57 1.5 1.71 3.5 2024
03/01/2023 20:21 03/01/2023 19:21 03/02/2023 00:00 4.6 3.30 5.3 2023
01/01/2023 15:54 01/01/2023 12:00 01/02/2023 00:00 12.0 0.80 1.8 2023
10/15/2022 23:07 10/15/2022 10:31 10/16/2022 06:00 19.5 1.97 3.8 2023
09/11/2022 22:25 09/11/2022 21:47 09/11/2022 23:48 2.0 6.97 10.2 2022
09/09/2022 03:34 08/09/2022 03:14 08/09/2022 04:55 1.7 3.62 5.7 2022
08/04/2022 05:24 08/04/2022 04:40 08/04/2022 07:05 2.4 7.08 10.3 2022
07/30/2022 19:09 07/30/2022 18:17 07/31/2022 00:38 6.3 10.67 19.0 2022
12/24/2021 17:13 12/24/2021 10:47 12/24/2021 18:53 8.1 6.21 9.1 2022
08/18/2021 13:59 08/18/2021 13:42 08/18/2021 15:02 1.3 2.60 4.5 2021
08/13/2021 23:06 08/13/2021 22:12 08/14/2021 04:17 6.1 10.37 17.6 2021
07/16/2021 09:41 07/16/2021 09:41 07/16/2021 09:56 0.3 0.42 0.9 2021
03/13/2020 16:39 03/13/2020 15:46 03/13/2020 19:02 3.3 8.32 12.1 2020
03/13/2020 01:08 03/13/2020 00:08 03/13/2020 06:00 5.9 0.94 2.1 2020
03/12/2020 16:07 03/12/2020 15:36 03/12/2020 17:29 1.9 4.11 6.3 2020
03/12/2020 07:57 03/12/2020 07:46 03/12/2020 12:00 4.2 1.71 3.5 2020
02/22/2020 09:12 02/22/2020 02:30 02/22/2020 12:00 3.5 0.84 1.8 2020
02/11/2020 01:56 02/11/2020 00:45 02/11/2020 03:08 2.4 0.37 0.8 2020
12/27/2019 17:06 12/27/2019 17:06 12/27/2019 18:00 0.9 0.34 0.7 2020
11/29/2019 04:41 11/29/2019 04:10 11/29/2019 08:54 4.7 5.28 7.9 2020
11/20/2019 18:11 11/20/2019 12:44 11/20/2019 20:06 7.4 1.42 3.1 2020
11/20/2019 09:23 11/20/2019 08:42 11/20/2019 10:40 2.0 0.74 1.6 2020
09/26/2019 17:45 09/26/2019 17:42 09/26/2019 18:46 1.1 2.16 4.0 2019
09/23/2019 19:20 09/23/2019 17:30 09/23/2019 23:05 5.6 9.69 15.7 2019
08/28/2019 22:35 08/28/2019 21:48 08/29/2019 01:31 3.7 8.87 13.4 2019
02/21/2019 12:04 02/21/2019 11:53 02/21/2019 17:25 5.5 1.15 2.5 2019
10/13/2018 14:38 10/13/2018 11:11 10/13/2018 16:13 5.0 0.99 2.2 2019
10/07/2018 04:33 10/07/2018 03:22 10/07/2018 09:26 6.1 10.34 17.6 2019
10/02/2018 18:48 10/02/2018 06:25 10/02/2018 20:46 14.4 7.60 11.1 2019
10/02/2018 10:23 10/02/2018 06:25 10/02/2018 20:46 14.4 7.35 10.7 2019
08/23/2018 18:43 08/23/2018 18:00 08/23/2018 23:06 5.1 9.59 15.5 2018
08/11/2018 00:09 08/11/2018 00:05 08/11/2018 01:22 1.3 0.35 0.8 2018
08/08/2018 20:21 08/08/2018 20:12 08/08/2018 21:27 1.3 3.49 5.5 2018
08/03/2017 17:10 08/03/2017 16:55 08/03/2017 18:00 1.1 3.44 5.4 2017
07/29/2017 17:49 07/29/2017 17:28 07/29/2017 19:15 1.8 4.52 6.9 2017
02/28/2017 08:00 02/28/2017 07:39 02/28/2017 12:00 4.3 1.28 2.8 2017
01/01/2017 10:00 01/01/2017 09:59 01/01/2017 11:25 1.4 0.40 0.9 2017
12/31/2016 05:59 12/31/2016 05:37 12/31/2016 07:35 2.0 1.05 2.3 2017
12/22/2016 11:03 12/22/2016 03:40 12/22/2016 12:34 8.9 6.51 9.5 2017
08/22/2016 16:48 08/22/2016 16:05 08/23/2016 06:00 13.9 8.26 12.1 2016
08/05/2016 09:57 08/05/2016 07:42 08/05/2016 14:27 6.8 10.10 16.9 2016
04/10/2016 13:44 04/10/2016 13:23 04/10/2016 15:14 1.9 4.38 6.7 2016
01/07/2016 11:45 01/07/2016 11:09 01/07/2016 18:00 6.9 1.14 2.5 2016
01/06/2016 22:30 01/06/2016 21:57 01/06/2016 22:38 0.7 5.45 8.1 2016
05/15/2015 15:38 05/15/2015 15:27 05/16/2015 02:08 10.7 3.48 5.5 2015
12/04/2014 08:14 12/04/2014 07:57 12/04/2014 18:21 10.4 1.85 3.7 2015
10/19/2014 18:42 10/19/2014 18:40 10/19/2014 19:48 1.1 1.18 2.6 2015
09/27/2014 15:08 09/27/2014 14:43 09/27/2014 16:38 1.9 11.50 23.5 2014
09/08/2014 05:01 09/08/2014 03:08 09/08/2014 12:50 9.7 11.50 23.5 2014
08/19/2014 13:24 08/19/2014 11:57 08/19/2014 21:31 9.6 10.72 19.2 2014
08/19/2014 07:13 08/19/2014 06:47 08/19/2014 09:36 2.8 6.28 9.2 2014
08/12/2014 22:12 08/12/2014 21:36 08/13/2014 00:41 3.1 6.38 9.3 2014
08/02/2014 18:08 08/02/2014 17:17 08/02/2014 21:12 3.9 8.68 12.9 2014
07/14/2014 19:46 07/14/2014 18:52 07/14/2014 21:52 3.0 7.68 11.2 2014
03/01/2014 21:32 03/01/2014 19:46 03/01/2014 23:51 4.1 4.48 6.8 2014
03/01/2014 12:37 03/01/2014 12:19 03/01/2014 13:56 1.6 4.00 6.2 2014
11/22/2013 06:56 11/22/2013 03:43 11/23/2013 04:00 24.3 0.98 2.1 2014
08/26/2013 19:55 08/26/2013 19:54 08/27/2013 01:49 5.9 0.35 0.8 2013
07/21/2013 11:35 07/21/2013 11:32 07/21/2013 13:48 2.3 0.40 0.9 2013
07/19/2013 23:24 07/19/2013 23:07 07/20/2013 01:48 2.7 4.70 7.1 2013
01/26/2013 13:42 01/26/2013 08:41 01/26/2013 15:58 7.3 0.60 1.3 2013
12/15/2012 16:10 12/15/2012 16:07 12/16/2012 15:57 23.8 0.52 1.2 2013
12/14/2012 01:35 12/14/2012 01:33 12/14/2012 15:57 14.4 1.48 3.2 2013
09/07/2012 08:55 09/07/2012 08:22 09/07/2012 11:47 3.4 5.00 7.5 2012
08/23/2012 02:17 08/23/2012 02:03 08/23/2012 03:01 1.0 4.08 6.3 2012
11/05/2011 01:00 11/05/2011 00:56 11/05/2011 03:56 3.0 0.58 1.3 2012
07/31/2011 22:15 07/31/2011 22:10 07/31/2011 23:27 1.3 4.50 6.8 2011
12/30/2010 03:07 12/30/2010 02:51 12/30/2010 04:25 1.6 2.38 4.3 2011
10/05/2010 13:05 10/05/2010 12:46 10/05/2010 20:40 7.9 4.95 7.4 2011
08/07/2010 05:06 08/07/2010 05:05 08/07/2010 06:21 1.3 0.88 1.9 2010
07/29/2010 16:46 07/29/2010 16:20 07/29/2010 17:19 1.0 3.08 5.0 2010
03/07/2010 13:21 03/07/2010 13:01 03/07/2010 23:36 10.6 1.08 2.4 2010
02/28/2010 00:49 02/28/2010 00:49 02/28/2010 11:34 10.8 1.03 2.3 2010
02/21/2010 05:46 02/21/2010 05:36 02/21/2010 11:36 6.0 1.53 3.3 2010
01/21/2010 20:52 01/21/2010 20:04 01/24/2010 17:37 69.6 4.55 6.9 2010
01/19/2010 22:17 01/19/2010 19:13 01/20/2010 00:10 5.0 1.28 2.8 2010
12/07/2009 12:53 12/07/2009 12:53 12/08/2009 02:00 13.1 1.00 2.2 2010
09/05/2009 10:35 09/05/2009 10:00 09/05/2009 12:18 2.3 5.15 7.7 2009
08/13/2009 04:22 08/13/2009 01:56 08/13/2009 06:20 4.4 1.83 3.7 2009
08/07/2009 20:43 08/07/2009 20:37 08/08/2009 01:07 4.5 0.77 1.7 2009

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