Well NA03801225ABB1 EW-9U (EW09U) Unconfined
Co-located Well(s): NA03801225ABB2 EW-9C (EW09C)

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Well Information Table
Common Well ID	NA03801225ABB1 EW-9U
USBR Well ID	EW09U
USGS Well ID	373106105363401
USGS Station Name	NA03801225ABB1 EW-9U
USGS Construction Date	06/30/1980
USGS Site Type	Well
USGS Site Use Information	Observation
USGS Groundwater Use Information	Unused
Data Source(s)	USGS, USBR
Location Data
TRS	NA03801225ABB1 EW-9U
USBR TRS	NA03801225ABB1
USGS TRS 1	NA03801225ABB1 EW-9U
Longitude/Latitude (NAD83)	-105.61023688 , 37.51828332
Longitude/Latitude Data Source	USBOR EW well locations
USGS Longitude/Latitude (NAD83)	-105.6100149 , 37.51833849
USBR Longitude/Latitude (NAD27)	-105.609666431825 , 37.5182781549433
Easting, Northing RGDSS-NAD83 (US ft)	218510.90 , 190171.72
USGS Topography	Valley flat
USGS County	Alamosa County
USGS Map Name	TWIN PEAKS
USGS Map Scale	24000
Elevation and Depth Data
Ground Elevation (ft NAVD88)	7633.33
Elevation Data Source	USBOR EW well database
USBR Ground Elevation (ft NGVD29)	7629.1
USGS Ground Elevation (ft NGVD29)	7529.10
1/3-Arc Second NED Ground Elevation (ft NAVD88)	7638.22
1-Arc Second NED Ground Elevation (ft NAVD88)	7633.56
SRTM Ground Elevation (ft NAVD88)	7640.99
Total Depth (ft)	81.00
USBR Total Depth (ft)	81
USGS Hole Depth (ft)	169.00
USGS Well Depth (ft)	80.00
Model Layer	1
Model Layer Source	Aquifer Type
Depth of Bottom of Layer 1	154
Depth of Bottom of Layer 2	370
Depth of Bottom of Layer 3	672
Depth of Bottom of Layer 4	1490
Additional Well Information	Logs, Construction
Aquifer Information
Aquifer Type	Unconfined
Aquifer Type Source	EW_AQFR
USGS Hydrologic Unit	San Luis
USGS Data Available	Water-level (GW.LEV)
Water-level Database Information
Water-level Count	341
Water-level Date Range	08/15/1980 thru 02/04/2025
Monitored within the last 18 months	Yes, most recently on 02/04/2025
Depth-to-Water Range (ft)	41.20 to 55.78
Water Table Elevation Range (ft NAVD88)	7577.55 to 7592.13
Water-Level-Source:Number-of-Measurements	USGS:60 USBR:304

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Water-level Data

2019 to Present

1967 to Present

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Measurement Date	Depth to Water (ft)	Elevation (ft NAVD88)	Data Source(s)
08/15/1980	41.20	7592.13	USBR
09/04/1980	41.64	7591.69	USGS
10/15/1980	41.54	7591.79	USBR
10/28/1980	41.55	7591.78	USBR
11/12/1980	41.51	7591.82	USBR
11/26/1980	41.51	7591.82	USBR
12/11/1980	41.51	7591.82	USBR
02/23/1981	41.61	7591.72	USBR
03/25/1981	41.78	7591.55	USBR
04/27/1981	41.94	7591.39	USBR
06/01/1981	42.00	7591.33	USBR
06/22/1981	42.04	7591.29	USBR
07/09/1981	41.98	7591.35	USBR
08/14/1981	41.96	7591.37	USBR
09/11/1981	41.95	7591.38	USBR
10/22/1981	41.97	7591.36	USBR
01/05/1982	42.23	7591.10	USGS,USBR
01/07/1982	42.20	7591.13	USGS
01/14/1982	42.06	7591.27	USGS
01/21/1982	42.18	7591.15	USGS
01/28/1982	42.18	7591.15	USGS
02/01/1982	42.21	7591.12	USGS
02/07/1982	42.23	7591.10	USGS
02/14/1982	42.23	7591.10	USGS
02/15/1982	42.22	7591.11	USBR
02/21/1982	42.37	7590.96	USGS
02/28/1982	42.32	7591.01	USGS
03/01/1982	42.35	7590.98	USGS
03/07/1982	42.44	7590.89	USGS
03/09/1982	42.43	7590.90	USBR
03/14/1982	42.44	7590.89	USGS
03/21/1982	42.58	7590.75	USGS
03/28/1982	42.42	7590.91	USGS
04/01/1982	42.45	7590.88	USGS
04/07/1982	42.34	7590.99	USGS
04/14/1982	42.39	7590.94	USGS
04/21/1982	42.39	7590.94	USGS
04/28/1982	42.45	7590.88	USGS
05/01/1982	42.58	7590.75	USGS
05/07/1982	42.52	7590.81	USGS
05/14/1982	42.46	7590.87	USGS
05/26/1982	42.48	7590.85	USBR
06/22/1982	42.40	7590.93	USBR
07/22/1982	42.59	7590.74	USBR
01/20/1983	43.06	7590.27	USBR
02/28/1983	43.02	7590.31	USBR
03/29/1983	43.02	7590.31	USBR
09/19/1983	43.29	7590.04	USBR
10/22/1983	43.34	7589.99	USBR
11/18/1983	43.39	7589.94	USBR
12/20/1983	43.45	7589.88	USBR
02/14/1984	43.53	7589.80	USBR
03/15/1984	43.56	7589.77	USBR
04/23/1984	43.49	7589.84	USBR
06/14/1984	43.64	7589.69	USBR
07/16/1984	43.66	7589.67	USBR
08/14/1984	43.75	7589.58	USBR
09/18/1984	43.71	7589.62	USBR
12/19/1984	43.84	7589.49	USBR
01/22/1985	43.88	7589.45	USBR
02/28/1985	43.94	7589.39	USBR
03/26/1985	43.99	7589.34	USBR
04/25/1985	43.97	7589.36	USBR
05/30/1985	44.07	7589.26	USBR
07/02/1985	44.13	7589.20	USBR
08/09/1985	44.18	7589.15	USBR
09/05/1985	44.19	7589.14	USBR
10/16/1985	44.26	7589.07	USBR
11/15/1985	44.32	7589.01	USBR
12/18/1985	44.46	7588.87	USBR
01/22/1986	44.43	7588.90	USBR
02/20/1986	44.45	7588.88	USBR
03/18/1986	44.55	7588.78	USBR
04/23/1986	44.51	7588.82	USBR
05/22/1986	44.52	7588.81	USBR
06/17/1986	44.57	7588.76	USBR
07/22/1986	44.70	7588.63	USBR
08/20/1986	44.66	7588.67	USBR
10/08/1986	44.74	7588.59	USBR
11/09/1986	44.70	7588.63	USBR
12/15/1986	44.72	7588.61	USBR
01/15/1987	44.65	7588.68	USBR
02/15/1987	44.90	7588.43	USBR
03/15/1987	44.96	7588.37	USBR
04/15/1987	45.00	7588.33	USBR
05/15/1987	44.98	7588.35	USBR
06/15/1987	44.95	7588.38	USBR
07/15/1987	45.03	7588.30	USBR
08/15/1987	44.99	7588.34	USBR
09/15/1987	45.05	7588.28	USBR
05/25/1988	45.39	7587.94	USBR
06/15/1988	45.43	7587.90	USBR
07/15/1988	45.45	7587.88	USBR
08/15/1988	45.50	7587.83	USBR
10/17/1988	45.60	7587.73	USBR
02/24/1989	45.73	7587.60	USBR
03/15/1989	45.70	7587.63	USBR
04/15/1989	45.75	7587.58	USBR
05/15/1989	45.79	7587.54	USBR
06/15/1989	45.83	7587.50	USBR
07/15/1989	45.86	7587.47	USBR
08/15/1989	45.88	7587.45	USBR
09/15/1989	45.91	7587.42	USBR
10/15/1989	45.95	7587.38	USBR
11/15/1989	46.07	7587.26	USBR
12/15/1989	45.94	7587.39	USBR
01/15/1990	45.98	7587.35	USBR
02/15/1990	46.01	7587.32	USBR
03/15/1990	46.04	7587.29	USBR
04/15/1990	46.04	7587.29	USBR
05/15/1990	46.05	7587.28	USBR
06/15/1990	46.04	7587.29	USBR
07/15/1990	46.03	7587.30	USBR
07/30/1990	45.99	7587.34	USBR
08/15/1990	46.23	7587.10	USBR
09/15/1990	46.22	7587.11	USBR
10/15/1990	46.33	7587.00	USBR
11/15/1990	46.53	7586.80	USBR
12/15/1990	46.63	7586.70	USBR
08/15/1992	47.03	7586.30	USBR
09/15/1992	47.13	7586.20	USBR
10/15/1992	47.17	7586.16	USBR
11/15/1992	47.15	7586.18	USBR
12/15/1992	47.11	7586.22	USBR
01/15/1993	47.23	7586.10	USBR
02/15/1993	47.22	7586.11	USBR
03/15/1993	47.31	7586.02	USBR
04/15/1993	47.27	7586.06	USBR
05/15/1993	47.27	7586.06	USBR
06/15/1993	47.30	7586.03	USBR
07/15/1993	47.33	7586.00	USBR
08/15/1993	47.35	7585.98	USBR
09/15/1993	47.39	7585.94	USBR
10/15/1993	47.37	7585.96	USBR
11/15/1993	47.46	7585.87	USBR
12/15/1993	47.37	7585.96	USBR
01/15/1994	47.40	7585.93	USBR
02/15/1994	47.51	7585.82	USBR
03/15/1994	47.50	7585.83	USBR
04/15/1994	47.61	7585.72	USBR
05/15/1994	47.55	7585.78	USBR
06/15/1994	47.53	7585.80	USBR
07/15/1994	47.55	7585.78	USBR
08/15/1994	47.63	7585.70	USBR
10/19/1994	47.74	7585.59	USGS,USBR
12/01/1994	47.72	7585.61	USBR
12/01/1994	47.73	7585.60	USGS
12/29/1994	47.70	7585.63	USGS,USBR
01/31/1995	47.75	7585.58	USGS,USBR
03/08/1995	47.85	7585.48	USGS,USBR
03/29/1995	47.75	7585.58	USGS,USBR
04/26/1995	47.87	7585.46	USGS,USBR
05/23/1995	47.79	7585.54	USGS,USBR
06/27/1995	47.82	7585.51	USGS,USBR
07/25/1995	47.84	7585.49	USGS,USBR
08/31/1995	47.89	7585.44	USGS,USBR
09/28/1995	47.85	7585.48	USGS,USBR
11/01/1995	47.87	7585.46	USGS,USBR
12/01/1995	47.92	7585.41	USGS,USBR
01/10/1996	47.87	7585.46	USGS,USBR
03/21/1996	47.95	7585.38	USGS
03/21/1996	47.94	7585.39	USBR
04/22/1996	47.93	7585.40	USBR
05/30/1996	48.00	7585.33	USGS,USBR
07/16/1996	48.01	7585.32	USBR
07/31/1996	47.95	7585.38	USBR
08/29/1996	48.04	7585.29	USGS,USBR
11/08/1996	48.05	7585.28	USBR
01/22/1997	48.14	7585.19	USBR
04/02/1997	48.08	7585.25	USBR
05/07/1997	48.20	7585.13	USBR
05/07/1997	48.21	7585.12	USGS
06/11/1997	48.23	7585.10	USBR
08/12/1997	48.22	7585.11	USBR
09/24/1997	48.25	7585.08	USBR
09/24/1997	48.26	7585.07	USGS
10/01/1997	48.32	7585.01	USBR
12/08/1997	48.20	7585.13	USBR
01/15/1998	48.24	7585.09	USGS
01/15/1998	48.23	7585.10	USBR
04/08/1998	48.49	7584.84	USBR
04/08/1998	48.50	7584.83	USGS
06/17/1998	48.47	7584.86	USBR
07/01/1998	48.47	7584.86	USGS
07/01/1998	48.46	7584.87	USBR
10/06/1998	48.55	7584.78	USBR
10/06/1998	48.56	7584.77	USGS
02/03/1999	48.45	7584.88	USBR
05/06/1999	48.73	7584.60	USGS
05/06/1999	48.72	7584.61	USBR
05/25/1999	48.87	7584.46	USBR
08/25/1999	48.79	7584.54	USBR
01/06/2000	49.02	7584.31	USBR
01/06/2000	49.03	7584.30	USGS
01/18/2000	48.76	7584.57	USBR
03/22/2000	48.93	7584.40	USBR
05/31/2000	48.98	7584.35	USBR
06/22/2000	49.03	7584.30	USGS,USBR
08/11/2000	48.99	7584.34	USBR
08/22/2000	49.04	7584.29	USBR
11/02/2000	49.12	7584.21	USBR
01/08/2001	49.19	7584.14	USBR
01/11/2001	49.19	7584.14	USGS
01/17/2001	49.20	7584.13	USBR
03/22/2001	49.26	7584.07	USBR
05/01/2001	49.22	7584.11	USBR
06/05/2001	49.32	7584.01	USBR
06/26/2001	49.33	7584.00	USGS
08/20/2001	49.31	7584.02	USBR
11/02/2001	49.42	7583.91	USBR
01/17/2002	49.55	7583.78	USGS,USBR
02/20/2002	49.56	7583.77	USBR
05/10/2002	49.59	7583.74	USBR
07/10/2002	49.68	7583.65	USBR
08/01/2002	49.80	7583.53	USGS,USBR
09/11/2002	49.71	7583.62	USBR
12/09/2002	49.78	7583.55	USBR
01/29/2003	49.94	7583.39	USGS,USBR
05/06/2003	49.90	7583.43	USBR
07/09/2003	50.08	7583.25	USGS
08/05/2003	50.02	7583.31	USBR
10/14/2003	50.00	7583.33	USBR
12/23/2003	50.10	7583.23	USBR
01/15/2004	50.23	7583.10	USGS,USBR
02/24/2004	50.24	7583.09	USBR
04/13/2004	50.24	7583.09	USBR
06/02/2004	50.31	7583.02	USBR
07/22/2004	50.37	7582.96	USGS,USBR
09/15/2004	50.39	7582.94	USBR
10/07/2004	50.43	7582.90	USBR
12/16/2004	50.57	7582.76	USBR
01/05/2005	50.52	7582.81	USBR
01/25/2005	50.58	7582.75	USBR
03/04/2005	50.56	7582.77	USBR
05/12/2005	50.65	7582.68	USBR
07/25/2005	50.74	7582.59	USBR
07/26/2005	50.75	7582.58	USGS
09/19/2005	50.86	7582.47	USBR
11/01/2005	50.77	7582.56	USBR
01/10/2006	50.80	7582.53	USBR
03/01/2006	50.93	7582.40	USBR
05/02/2006	50.98	7582.35	USBR
06/21/2006	51.04	7582.29	USBR
08/07/2006	51.11	7582.22	USBR
09/12/2006	51.15	7582.18	USBR
11/08/2006	51.10	7582.23	USBR
01/04/2007	51.16	7582.17	USBR
03/20/2007	51.25	7582.08	USBR
06/20/2007	51.40	7581.93	USBR
08/06/2007	51.42	7581.91	USBR
09/20/2007	51.52	7581.81	USBR
01/14/2008	51.65	7581.68	USBR
02/13/2008	51.45	7581.88	USBR
04/24/2008	51.63	7581.70	USBR
05/12/2008	51.60	7581.73	USBR
07/14/2008	51.67	7581.66	USBR
09/11/2008	51.77	7581.56	USBR
12/01/2008	51.94	7581.39	USBR
02/18/2009	51.99	7581.34	USBR
04/13/2009	52.02	7581.31	USBR
07/09/2009	52.02	7581.31	USBR
09/01/2009	52.14	7581.19	USBR
11/03/2009	52.06	7581.27	USBR
12/08/2009	52.10	7581.23	USBR
03/12/2010	52.26	7581.07	USBR
06/16/2010	52.26	7581.07	USBR
09/15/2010	52.37	7580.96	USBR
12/01/2010	52.32	7581.01	USBR
02/16/2011	52.33	7581.00	USBR
05/24/2011	52.45	7580.88	USBR
09/06/2011	52.54	7580.79	USBR
11/14/2011	52.61	7580.72	USBR
12/08/2011	52.57	7580.76	USBR
02/09/2012	52.58	7580.75	USBR
03/06/2012	52.50	7580.83	USBR
05/29/2012	52.71	7580.62	USBR
08/06/2012	52.75	7580.58	USBR
09/05/2012	52.76	7580.57	USBR
11/06/2012	52.84	7580.49	USBR
12/04/2012	52.85	7580.48	USBR
01/22/2013	52.87	7580.46	USBR
03/04/2013	52.87	7580.46	USBR
05/06/2013	52.95	7580.38	USBR
06/13/2013	52.99	7580.34	USBR
08/28/2013	53.00	7580.33	USBR
11/06/2013	53.12	7580.21	USBR
12/02/2013	52.97	7580.36	USBR
02/03/2014	53.04	7580.29	USBR
03/04/2014	53.08	7580.25	USBR
05/14/2014	53.19	7580.14	USBR
06/03/2014	53.20	7580.13	USBR
08/05/2014	53.22	7580.11	USBR
08/27/2014	53.26	7580.07	USBR
11/05/2014	53.33	7580.00	USBR
12/02/2014	53.27	7580.06	USBR
01/02/2015	53.30	7580.03	USBR
03/02/2015	53.30	7580.03	USBR
05/05/2015	53.42	7579.91	USBR
06/01/2015	53.43	7579.90	USBR
08/04/2015	53.52	7579.81	USBR
08/31/2015	53.50	7579.83	USBR
11/04/2015	53.53	7579.80	USBR
12/01/2015	53.59	7579.74	USBR
03/02/2016	53.59	7579.74	USBR
05/03/2016	53.69	7579.64	USBR
08/22/2016	53.71	7579.62	USBR
11/08/2016	53.83	7579.50	USBR
12/07/2016	53.92	7579.41	USBR
02/03/2017	53.85	7579.48	USBR
05/03/2017	53.94	7579.39	USBR
08/08/2017	53.98	7579.35	USBR
11/08/2017	54.09	7579.24	USBR
02/06/2018	54.07	7579.26	USBR
05/04/2018	54.20	7579.13	USBR
08/03/2018	54.20	7579.13	USBR
11/02/2018	54.32	7579.01	USBR
02/06/2019	54.49	7578.84	USBR
05/01/2019	54.43	7578.90	USBR
08/01/2019	54.45	7578.88	USBR
11/05/2019	54.49	7578.84	USBR
01/30/2020	54.55	7578.78	USBR
05/05/2020	54.70	7578.63	USBR
08/12/2020	54.75	7578.58	USBR
11/09/2020	54.81	7578.52	USBR
02/02/2021	54.85	7578.48	USBR
05/04/2021	54.94	7578.39	USBR
08/05/2021	55.01	7578.32	USBR
11/03/2021	55.09	7578.24	USBR
02/01/2022	55.01	7578.32	USBR
05/04/2022	55.13	7578.20	USBR
08/03/2022	55.24	7578.09	USBR
11/03/2022	55.25	7578.08	USBR
02/01/2023	55.34	7577.99	USBR
05/02/2023	55.36	7577.97	USBR
09/01/2023	55.47	7577.86	USBR
10/31/2023	55.54	7577.79	USBR
02/12/2024	55.59	7577.74	USBR
05/17/2024	55.63	7577.70	USBR
08/28/2024	55.70	7577.63	USBR
12/02/2024	55.76	7577.57	USBR
02/04/2025	55.78	7577.55	USBR

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Well NA03801225ABB1 EW-9U (EW09U)Unconfined

View Digital Orthophoto Quadrangle for this area

Water-level Data

2019 to Present

1967 to Present

Well NA03801225ABB1 EW-9U (EW09U)
Unconfined