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Ground-Water Watch

Site Number: 410947071344803 - RI-NHW 258 NEW SHOREHAM (BLOCK ISLAND)

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Watch Help Page

DESCRIPTION:: Latitude 41�'47", Longitude 71�'48" NAD27
Washington County, Rhode Island, Hydrologic Unit 01090005; Well depth: 19 feet
Hole depth: 19.5 feet
Land surface altitude: 121.79 feet above sea level NGVD29.
Well completed in "Sand and gravel aquifers (glaciated regions)" (N100GLCIAL) national aquifer.
Well completed in "TILL" (112TILL) local aquifer

AVAILABLE DATA FROM NWISWeb:

Field ground-water-level measurements
Additional Data Sources	Begin Date	End Date	Count
Annual Water Data Report (pdf) offsite	2005	2006	2

OPERATION:: Record for this site is maintained by the USGS Massachusetts Water Science Center; Email questions about this site to Massachusetts Water-Data Inquiries

Site Statistics

Monthly statistics plot for 410947071344803

Most recent data value: 12.27 on 8/24/2008
Period of Record Monthly Statistics for 410947071344803
Depth to water level, feet below land surface
All Approved Continuous & Periodic Data Used In Analysis
Note: Bold values in the table indicate closest statistic to the most recent data value.
Month Lowest
Level 10th
%ile 25th
%ile 50th
%ile 75th
%ile 90th
%ile Highest
Level Number
of
Years
Jan 13.56 13.41 12.40 11.55 10.98 10.59 10.48 16
Feb 13.10 12.76 11.70 11.44 10.81 10.63 10.55 13
Mar 12.85 12.06 11.33 10.93 10.54 10.09 10.05 15
Apr 11.84 11.83 11.57 10.43 10.35 10.08 9.95 15
May 11.91 11.90 11.47 11.11 10.82 10.50 10.50 14
Jun 12.33 12.19 11.79 11.54 11.28 10.09 10.03 16
Jul 12.44 12.44 12.32 12.05 11.62 10.63 10.29 13
Aug 13.15 13.02 12.76 12.46 11.84 11.68 11.52 18
Sep 13.41 13.28 13.13 12.94 12.18 11.74 11.34 14
Oct 13.64 13.58 13.40 12.62 11.80 10.83 10.55 16
Nov 13.85 13.84 13.43 12.55 11.51 10.94 10.32 15
Dec 14.08 13.94 13.10 12.06 11.19 10.57 10.28 13

Statistics Options

View month/year statistics

Periodic Ground-Water Data

Ground-water hydrograph for well 410947071344803

Summary Statistics for Period of Record Periodic Water Levels

Depth to water level, feet below land surface

Approved Periodic Water Level Values

Begin Date

End Date

Number of Values

10/25/89

08/24/08

186

Highest WL	Date of Highest WL	Lowest WL	Date of Lowest WL
9.95	04/21/03	14.08	12/22/07

	Ground-Water Levels Options
	View NWISWeb ground-water levels page
	View annual monthly statistics for all data types
	Download ground-water levels in text format

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URL: http://groundwaterwatch.usgs.gov/AWLSites.asp
Page Contact Information: OGW Webmaster
Last update: Tuesday, August 12, 2008 at 08:42