£¤7

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£¤91

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£¤7

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£¤5

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£¤5

£¤7

£¤7

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£¤7

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§̈¦93

§̈¦189

§̈¦93

EDEN

STOWE

JAY DERBY

MILTON

LOWELL

PERU

FAIRFIELD

IRA

TROY

RIPTON

NEWBURY

DANVILLE

GROTON

LEWIS

DANBY

SWANTON

ESSEX

ORWELL

BETHEL

CHESTER

CHITTENDEN

HIGHGATE

JAMAICA

DORSET

CABOT

RUPERT

POWNAL

CALAIS

ADDISON

BENSON

BARNET

BARTON

CORINTH

LINCOLN

CAMBRIDGE

PAWLET

CONCORD

BRIGHTON

BOLTON

BERLIN

DOVER

WINHALL

BARNARD

TOPSHAM

ALBANY

ALBURGH

BURKE

GEORGIA

VICTORY

PEACHAM

BRISTOL

FAIRFAX

HALIFAX

LYNDON

SHARON

SUTTON

ELMORE

JOHNSON

FERRISBURG

AVERILL

GLOVER

GRANBY

NORWICH

WALDEN

ROCHESTER

FERDINAND

GRANVILLE

READING

UNDERHILL

WARREN

ORANGE

BRIDPORT

NORTON

PLYMOUTH

COLCHESTER

DUXBURY

STRATTON

RANDOLPH

CHELSEA

MENDON

NEWARK

LUDLOW

ROXBURY

ENOSBURG

HARTLAND

CHARLOTTE

HARTFORD

FRANKLIN

KIRBY

HOLLANDRICHFORD

THETFORD

SHELDON

WESTON

POULTNEY

JERICHO

POMFRET

BRANDON

KILLINGTON

NEWFANE

SHOREHAM

CANAAN

WOLCOTT

WOODFORD

GRAFTON

IRASBURG

WATERBURY

FAYSTON

HANCOCK

RYEGATE

SANDGATE

PITTSFORD

GUILFORD

MONTGOMERY

TUNBRIDGE

MORGAN

SPRINGFIELD

ROYALTON

FLETCHER

MORRISTOWN

BERKSHIRE

LUNENBURG

STRAFFORD

ARLINGTON

SHELBURNE

MARLBORO

HARDWICK

MONKTON

VERSHIRE

CASTLETON

STAMFORD

NORTHFIELD

WHEELOCK

WESTFIELD

SOUTH HERO

SHREWSBURY

ST. ALBANS TOWN

MIDDLESEX

NEW HAVEN

WELLS

NORTH HERO

WESTFORD

CAVENDISH

MARSHFIELD

HYDE PARK

BRAINTREE

MOUNT HOLLY

HINESBURG

BRIDGEWATER

WOODSTOCK

MORETOWN

SUNDERLAND

PUTNEY

STARKSBORO

WOODBURY

WILMINGTON

TOWNSHEND

SHAFTSBURY

BROOKFIELD

WESTMOREBELVIDERE

BENNINGTON

STOCKBRIDGE

BLOOMFIELD

WATERFORD

ROCKINGHAM

WESTMINSTER

BAKERSFIELD

MIDDLEBURY

MANCHESTER

MOUNT TABOR

RICHMOND

WHITINGHAM

SHEFFIELD

GLASTENBURY

WORCESTER

LEMINGTON

GUILDHALL

EAST HAVEN

WALLINGFORD

ANDOVER

CRAFTSBURY

GRAND ISLE

WILLISTON

HUNTINGTON

RUTLAND

READSBORO

WASHINGTON

CHARLESTON

GREENSBORO

TINMOUTH

MAIDSTONE

SALISBURY

WINDHAM

BRADFORD

PANTON

WEATHERSFIELD

NEWPORT TOWN

WILLIAMSTOWN

CORNWALL

FAIRLEE

CLARENDON

COVENTRY

SOMERSET

GOSHEN

VERNON

LONDONDERRY

ST. JOHNSBURY

BARRE TOWN

SUDBURY

WARDSBORO

BRATTLEBORO

WEST HAVEN

WAITSFIELD

DUMMERSTON

BRUNSWICK

WINDSOR

HUBBARDTON

LEICESTER

PLAINFIELD

BROWNINGTON

PITTSFIELD

ATHENS

SEARSBURG

EAST MONTPELIER

WHITING

WEYBRIDGE

AVERYS GORE

WATERVILLE

STANNARD

WEST FAIRLEE

WEST WINDSOR

FAIR HAVEN

SOUTH BURLINGTON

ISLE LA MOTTE

BURLINGTON

WEST RUTLAND

BROOKLINE

MIDDLETOWN SPRINGS

WALTHAM

MONTPELIER

PROCTOR

LANDGROVE

WARREN GORE

RUTLAND CITY

NEWPORT CITY

BALTIMORE

BUELS GORE BARRE CITY

ST. GEORGE

VERGENNES

WARNERS GRANT

WINOOSKI

ST. ALBANS CITY

73°0'0"W

73°0'0"W

72°0'0"W

72°0'0"W45°0'0"N

44°0'0"N

43°0'0"N

45°0'0"N

44°0'0"N

43°0'0"N73°0'0"W

43°0'0"N

73°0'0"W

44°0'0"N

73°0'0"W

45°0'0"N 72°0'0"W

45°0'0"N

10 0 10 20 305Miles

Scale 1:250,000

.THIS MAP IS A SUMMARY OF WATER

WELL DATA COMPILED BY BEDROCK UNIT. THE MAP IS NOT PROBABALISTIC AND SHOULD NOT BE USED TO PREDICT

YIELD OR DEPTH.

Mean Yield (gpm) of Water Wells Compiled by Bedrock Unit, Vermont.by

Marjorie Gale, Ryan Knox, George Springston, and Laurence Becker2009

DATA AND DATA SOURCES:Number of wells: 92,315Number of located wells: 10,807Mean yield, all wells: 13.76 gpmMedian yield, all wells: 6 gpmMean depth, all wells: 293.02 ft.Median depth, all wells: 260 ft.The well data used in this study is a derivative set of the Vermont Dept. of Environmental Conservation Water Supply Division (WSD) well driller database. The location of the data points is from 1) well driller maps and written descriptions, 2) E911 addresses (3100 wells), and 3) GPS measurements (7707 wells). Only 12% of the wellshave a reliable location.Of the 92,315 wells, most are completed in bedrock, although many have no entry in the "well type" data field. Some corrections were made to the database where numerical errors were obvious and could be reconciled with a driller report. Some well yield values may be inflated due to difficulty in accurately measuring high yields. No attempt was made to discern the rock type in whicha well was actually completed as compared to the rock type at the surface. Where units are thin and shallow dipping, it is possible that a well penetrates one or more formations. Point density is shown in shades of blue, with deeper shades reflecting higher point density.Bedrock map units from the USGS digital data from the 1961 Centennial Geologic Map of Vermont, scale 1:250,000. Reference:USGS Open-File Report 2006-1272 Preliminary Integrated Geologic Map Databases for the United States: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Rhode Island and Vermonthttp://pubs.usgs.gov/of/2006/1272/

Vermont Geological Survey Open File Report VG09- 8, Plate 4 of 7

LEGENDMean yield (gpm) by rock unit (symbology from

1961 Centennial Geologic Map of Vermont).

Interstate HighwayUS Highway, VT State Highway or Class 1 Town Highway

Town Boundary

County Boundary

Water body

2 - 4.99 gpmCogOha

nhdOos

pCgn

Oor - no data

Fault - Thrust, normal or reverse

20 - 34.57 gpmCmoDghOb

CuwObb

15 - 19.99 gpm OhiOmco

Omi

Omiv

Os

OCsg

Omcr

OmicOmid

Oml

pCmOCsOCsc

DwDwc

nhu

CsrCssmCtCujCwDwa

Csh

CcCcsCdCdaCf

Cm

CpaCpt

ChbChg

10 -14.99 gpm

ChChm

CpcCpgCph

?Ccg?Ccm?CcrCbh

CbrCbrc

Cdt

ChoChogChopChw

OcbOcbe

Och

OcwOCu

OalOc

Ocbr

OglOgoOhgOmbOmcOmhOmhbOmm

hu OmuOmwOop

SfSs

pCpCsq

udpusuuwdwewgwlewnwswv

CrbCsCoCpCsaCsbCscbCuCuaCubCugDgDga

DwbDwsDSn

5 - 9.99 gpm

Sc

pCgpCsg

OofOpOpaOpvOsp

OgsOhOiOo

ou

DgmDlnhbOa

Cufb

ChtCpgcCscCsczCucCuf

CufpCup

Published by:VT Geological Survey, L. Becker, State GeologistVT Dept. of Environmental ConservationVT Agency of NAtural Resources103 South Main St., Logue CottageWaterbury, VT 05671-2420http://www.anr.state.vt.us/dec/geo/vgs.htm