Station No.: 323313117033901-5 019S002W02C007-11S   Agency: USGS

LOCATION.--Lat 32°33'13", long 117°03'39" referenced to North American Datum of 1927, San Diego County, CA, Hydrologic Unit 18070305, 

ROAD LOG.--
1: Start out going SOUTH on TECH CENTER DR toward SCRIPPS POWAY PKWY. 0.0 mi 

2: Turn LEFT onto SCRIPPS POWAY PKWY. 4.5 mi

3: SCRIPPS POWAY PKWY becomes MERCY RD. 0.0 mi

4: Merge onto I-15 S via the ramp on the LEFT. 11.3 mi

5: I-15 S becomes CA-15 S. 6.7 mi

6: CA-15 S becomes I-5 S. 9.6 mi

7: Take the DAIRY MART RD exit, EXIT 2. 0.3 mi

8: Turn RIGHT onto DAIRY MART RD. 0.1 mi

9: End at 2225 Dairy Mart Rd San Ysidro, CA 92173-2840

Cluster well is located inside the International Boundary and Water Comission fenced yard. The yard is locked promptly at 3:30pm M-F, and the USGS is not allowed a key to the gate. All site visits must be made during IBWC business hours. The vault is located in the gravel parking lot, at ground level, 60 feet southeat of the southeast corner of the IBWC office building.

IBWC Contact info is: 
2225 Dairy Mart Road 
San Ysidro, CA 92173-2840 
(619) 662-7600
Fax: (619) 662-7607

ESTABLISHMENT AND HISTORY.--This cluster well site was established as a continuous monitoring site by the U.S. Geological Survey in May 27, 2008.

GAGE.--Instrumentation consists of a Design Analysis H500XL data logger transmitting through a Design Analysis SE-300 GOES HDR transmitter (DCP), five Insitu model Level Troll 500 non-vented pressure transducers, and one Insitu model Baro Troll 500 barometer. A rechargeable 12-volt battery and solar panel provides power. Instruments are housed in a "Knack box", approx 10 feet north of the subterranean concrete and steel vault (with a USGS 2640 lock).

Altitude of gage is 35ft, from topographic map. 

WELL CHARACTERISTICS.--The following are originally reported depths; soundings are considered accurate to within 1.0 ft:

                  Drilled               Casing
Well No.          depth (ft)            depth (ft)
  19S/2W-2C7           1430            	  1360
  19S/2W-2C8           1430           	  1190
  19S/2W-2C9           1430           	   965
  19S/2W-2C10          1430           	   600
  19S/2W-2C11          1430           	   280

State well number	USGS station number	Hole depth (ft)	Perforation depth (ft)	Casing size and type	Date drilled
19S/2W-2C7	323313117033901	1430	1340-1360	2" PVC	6/13/95
19S/2W-2C8	323313117033902	1430	1170-1190	2" PVC	6/13/95
19S/2W-2C9	323313117033903	1430	945-965	2" PVC	6/13/95
19S/2W-2C10	323313117033904	1430	580-600	2" PVC	6/13/95
19S/2W-2C11	323313117033905	1430	260-280	2" PVC	6/13/95

ACCURACY.--Records are rated good to excellent, provided the sensor/cable assemblies do not slip or are not damaged/disturbed during measuring/sampling activities in the vault. 

COOPERATION.--The station is operated under cooperative agreement with the Tijuana County Water District.

MEASURING POINT.--The current MPs for all wells is the top of the 2-inch PVC casing. The MP elevations for each well are as follows:

Well No.          MP Elev. above/below LSD (ft)  19S/2W-2C7                     0.94 blw
  19S/2W-2C8                     0.78 blw
  19S/2W-2C9                     0.64 blw
  19S/2W-2C10                    0.46 blw
  19S/2W-2C11                    0.22 blw

All wells are located in a main vault, and each well is identified by number on the casing and on the cap.

EQUIPMENT.--Instrumentation consists of a Design Analysis H500XL data logger transmitting through a Design Analysis SE-300 GOES HDR transmitter (DCP), five Insitu model Level Troll 500 non-vented pressure transducers, and one Insitu model Baro Troll 500 barometer. A rechargeable 12-volt battery and solar panel provides power. Instruments are housed in a subterranean concrete and steel vault (with a USGS 2640 lock).

Altitude of gage is 35ft, from topographic map. 

WATER LEVEL RECORD.--This cluster-well was established as a continuous monitoring site by the U.S. Geological Survey on May 27, 2007. Water-level data are collected at 15-minute intervals, and are reported as "Depth Below LSD" and "Water Level, NAVD."

MISSING RECORD: The 2010 WY record for Well #1 is usable except for the following periods:

Dec.7 - 14 (8 days): No data recorded.

Mar. 22 (1 day): Bad noon unit value "X'd out" in Hydra.

TOTAL MISSING RECORD (WY 2010): 9 (of 365) days, or 2.5% 

WATER LEVEL CORRECTIONS.--Water-level check-measurements are made according to standard USGS procedures. Measurements get recorded into a handheld PDA using the MONKES program. (PDA/MONKES usage started during the early 2010 WY.) MONKES files get uploaded into GWSI and are archived. 

DATUM.--Land-surface datum is 45.26 ft above North American Vertical Datum of 1988. Measuring point: MEASURINGPOINT. 

PERIOD OF RECORD.--Water years 1995-96, 2005 to current year.
PERIOD OF DAILY RECORD.--May 2007 to current year.

State well number	USGS station number	Intermittent water-level	Daily water-level
19S/2W-2C7	323313117033901	07/17/1995 to present	05/11/2007 to present
19S/2W-2C8	323313117033902	07/17/1995 to present	05/23/2007 to present
19S/2W-2C9	323313117033903	07/17/1995 to present	05/11/2007 to present
19S/2W-2C10	323313117033904	07/17/1995 to present	05/11/2007 to present
19S/2W-2C11	323313117033905	07/17/1995 to present	05/11/2007 to present