aquifer_polygons

Identification Information

Citation Information

Originator	Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)
Publication Date	20110920
Title	aquifer_polygons
Geospatial Data Presentation Form	vector digital data
Series Name	Significant aquifer maps
Issue Identification	Printed map citation for individual quadrangles listed in the author, pubdate, title, and source fields in associated attribute table.
Publication Place	Augusta, Maine
Publisher	Maine Department of Conservation, Maine Geological Survey and Maine Office of Geographic Information Systems
Other Citation Details	Full citation for significant aquifer polygons includes the author, pubdate, title, and source fields in the associated attribute table.

Abstract

AQUIFER_POLYGONS contains polygons of significant aquifers (glacial deposits that are a significant ground water resource) for Maine mapped at a scale 1:24,000, from the Department of Conservation, Maine Geological Survey. Printed maps published by the Maine Geological Survey on USGS 7.5' quadrangle bases. Aquifer boundaries delineated and digitized by the Maine Geological Survey from data compiled on USGS 7.5' quadrangle bases. Aquifer polygons coded by yield expected from a properly constructed well (ATYPE = 0 area not mapped as aquifer; ATYPE = 1 10-50 gallons-per-minute; ATYPE = 2 greater than 50 gallons-per-minute; ATYPE = 3 island of non-aquifer material within an area mapped as aquifer). See aquifer_contacts data set for aquifer contact characteristics.

Purpose

Delineate glacial deposits that may be a significant ground water resource for water resources evaluation and ground water protection.

Time Period of Content

Beginning Date	19980101
Ending Date	20110101
Currentness Reference	publication date

Status

Progress	Complete
Maintenance and Update Frequency	Irregular

Bounding Coordinates

West Bounding Coordinate	-71.260767
East Bounding Coordinate	-66.766774
North Bounding Coordinate	47.500650
South Bounding Coordinate	42.908008

Keywords

Theme	hydrogeology, sand and gravel, geology, ground water, 24000, surficial deposits, aquifers (Maine GIS Thesaurus - Theme)
Theme	geoscientificInformation (ISO Keywords Thesaurus)
Theme	geoscientificInformation (ISO 19115 Topic Categories)
Place	Maine, USA (Maine GIS Thesaurus - Place)
Stratum	hydrosphere (Maine GIS Thesaurus - Stratum)

Access Constraints

Secondary distribution by permission only.

Use Constraints

Users must assume responsibility in determining the usability of this data for their purposes. User must include full citation (author, pubdate, title, and source fields in associated attribute table) for the aquifer polygons when using the data in printed or digital form.

Contact Organization

Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Address Type

mailing

Address

22 State House Station

City

Augusta

State or Province

Postal Code

04333-0022

Country

Contact Voice Telephone

207-287-2801

Data Set Credit

Credit should be given to the data source and/or originator when data is transferred or printed. Source should be cited as: Maine Department of Conservation, Maine Geological Survey, 22 State House Station, Augusta, ME 04333-0022.

Native Data Set Environment

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; Esri ArcGIS 10.1.0.3035

Attribute Accuracy Report

Attribution of the data set was checked for data entry errors through a series of reviews that checked for inconsistencies with interpretation results. The coverage has been checked for label errors and attribution is complete.

Logical Consistency Report

1: Aquifers are not mapped beneath water bodies 2: Aquifers are classified based on the expected yield to a properly constructed well. ATYPE = 0 is an area not mapped as aquifer. ATYPE = 1 is an area of aquifer expected to yield 10-50 gallons-per-minute to a properly constructed well. ATYPE = 2 is an area of aquifer expected to yield greater than 50 gallons-per-minute to a properly constructed well. ATYPE = 3 is an island of non-aquifer material within an area mapped as aquifer.

Completeness Report

Significant aquifers are defined as bodies of coarse grained glacial material with the potential to yield 10 or more gallons-per-minute (gpm) to a properly constructed well. Aquifers are defined with a potential to yield greater than 10 gpm and aquifers with the potential to yield greater than 50 gpm (high-yield aquifers).

Horizontal Positional Accuracy Report

The data were compiled on a 1:24,000 scale base with a horizontal accuracy +/- 40 feet or 12 meters. Aquifer boundaries are drawn based on field observations of surficial materials in gravel pits, stream banks, road cuts, and other exposures. Mapping is supplemented with seismic-refraction studies and the installation of observation wells and test borings, information from water-company exploration, large construction projects, town well inventories, and other sources. This information, along with aerial photography and previously published maps, allows the geologist to define the boundaries of favorable surficial deposits and estimate how well the deposits will yield water to a well. Although interpretation rests on an extensive base of geologic information, analysis of bedrock surface and surficial materials, more often than not, prohibits a precise quantitative measure of horizontal accuracy. In the aquifer_contact data set, an arc coded with LSYMBOL = 11 (solid line) represents a more clearly defined boundary location than those coded LSYMBOL = 12 (dashed line).

Citation Information

Originator	U.S. Geological Survey (USGS)
Title	(24k) USGS 1:24,000 scale quadrangles
Geospatial Data Presentation Form	map
Series Name	National Mapping Program Standard Series Topographic Maps
Issue Identification	USGS 7.5 Minute Map Series
Publication Place	Reston, VA
Publisher	U.S. Geological Survey
Other Citation Details	24000 Publication date is unique to each quadrangle in the map series. Standard 7.5x7.5 minute quadrangles cover geographic areas of 49 to 71 square miles. 1 inch at map scale represents 2000 feet.
Online Linkage	http://mapping.usgs.gov/mac/maplists/howtoselectmaps.html

Source Scale Denominator

24000

Type of Source Media

hardcopyDiazo

Beginning Date

1/1/1948

Ending Date

unknown

Source Currentness Reference

http://mapping.usgs.gov/mac/maplists/howtoselectmaps.html

Source Citation Abbreviation

(24k) USGS 1:24,000 scale quadrangles

Source Contribution

USGS 1:24,000 7.5' quadrangles used as mapping base

Process Description

Significant aquifers are defined as bodies of coarse grained glacial material with the potential to yield 10 or more gallons-per-minute (gpm) to a properly constructed well. Aquifer boundaries are drawn based on field observations of surficial materials in gravel pits, stream banks, road cuts, and other exposures. This surficial geology mapping is supplemented with seismic-refraction studies and the installation of observation wells and test borings and information from water-company exploration, large construction projects, town well inventories, and other sources. This information, along with aerial photography and previously published maps, allows the geologist to define the boundaries of favorable surficial deposits and estimate how well the deposits will yield water to a well. The boundaries of favorable surficial deposits do not necessarily coincide with the aquifer boundaries. In some areas, a thin cover of favorable coarse-grained material may overlie fine-grained sediments, till, or bedrock. A well in that material would not be able to sustain a yield of 10 gpm, so the area would not be mapped as an aquifer. In other areas, fine-grained sediments or till may overlie favorable coarse-grained sediments and the subsurface deposit may not be recognized as an aquifer. Single- and 12-channel seismic-refraction studies are conducted to determine the saturated thickness of a deposit by establishing the depth to water table and bedrock surface. Installing monitoring wells and drilling test borings provide direct information about the aquifer characteristics of a deposit. This work provides information on the depth to water table and bedrock surface, water quality, and how easily the sediment transmits water. The information is compiled on a USGS 1:24000 topographic map. The aquifer contacts are based on an interpretation of information described above by a geologist and the aquifer contacts drawn on a stable mylar base. Aquifers with the potential to yield 10-50 gpm and aquifers with the potential to yield greater than 50 gpm (high-yield aquifers) are defined. The contacts were digitized to produce this data set.

Contact Organization

Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Address Type

mailing

Address

22 State House Station

City

Augusta

State or Province

Postal Code

04333-0022

Country

Contact Voice Telephone

207-287-2801

Process Description

Replaced polygons for MGS publication: 05-44, Significant sand and gravel aquifers in the Togus Pond quadrangle, Maine

Process Date

20060130

Contact Person

Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Address Type

mailing

Address

22 State House Station

City

Augusta

State or Province

Postal Code

04333-0022

Country

Contact Voice Telephone

207-287-2801

Process Description

Updated/replaced polygons for the following MGS publications: 06-3, Significant sand and gravel aquifers in the Petit Manan quadrangle, Maine 06-8, Significant sand and gravel aquifers in the Seal Harbor quadrangle, Maine 06-10, Significant sand and gravel aquifers in the Sargentville quadrangle, Maine 06-12, Significant sand and gravel aquifers in the Southwest Harbor quadrangle, Maine 06-13, Significant sand and gravel aquifers in the Castine quadrangle, Maine 06-24, Significant sand and gravel aquifers in the Buckfield quadrangle, Maine Added polygons for the following MGS publications: 06-25, Significant sand and gravel aquifers in the Allagash Lake quadrangle, Maine 06-27, Significant sand and gravel aquifers in the Fish River Lake SW quadrangle, Maine 06-29, Significant sand and gravel aquifers in the Big Brook Lake quadrangle, Maine 06-31, Significant sand and gravel aquifers in the Five Finger Brook quadrangle, Maine 06-33, Significant sand and gravel aquifers in the McKeen Lake quadrangle, Maine 06-35, Significant sand and gravel aquifers in the Gardner Pond quadrangle, Maine 06-37, Significant sand and gravel aquifers in the Round Pond quadrangle, Maine

Process Date

20060622

Contact Organization

Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Address Type

mailing

Address

22 State House Station

City

Augusta

State or Province

Postal Code

04333-0022

Country

Contact Voice Telephone

207-287-2801

Process Description

Added polygons for the following MGS publications: 06-40, Sand and gravel aquifers in the Houlton Pond quadrangle, Maine 06-42, Sand and gravel aquifers in the Seven Islands quadrangle, Maine 06-44, Sand and gravel aquifers in the Blue Brook quadrangle, Maine 06-46, Sand and gravel aquifers in the Big Black Rapids quadrangle, Maine 06-48, Sand and gravel aquifers in the Ninemile Deadwater quadrangle, Maine 06-50, Sand and gravel aquifers in the Charles Pond quadrangle, Maine 06-52, Sand and gravel aquifers in the St. Pmaphile quadrangle, Maine

Process Date

20060707

Contact Organization

Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Address Type

mailing

Address

22 State House Station

City

Augusta

State or Province

Postal Code

04333-0022

Country

Contact Voice Telephone

207/287/2801

Process Description

Updated/replaced polygons for the following MGS publications: 06-72, Significant sand and gravel aquifers in the Worthley Pond quadrangle, Maine (supersedes publication 98-210) 06-73, Significant sand and gravel aquifers in the Canton quadrangle, Maine (supersedes publication 98-217) 06-74, Significant sand and gravel aquifers in the West Sumner quadrangle, Maine (supersedes publication 98-213)

Process Date

20060721

Contact Organization

Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Address Type

mailing

Address

22 State House Station

City

Augusta

State or Province

Postal Code

04333-0022

Country

Contact Voice Telephone

207-287-2801

Process Description

Updated/replaced polygons for the following MGS publications: 06-76, Significant sand and gravel aquifers in the Searsmont quadrangle, Maine 06-78, Significant sand and gravel aquifers in the Lincolnville quadrangle, Maine 07-2, Significant sand and gravel aquifers in the Blue Hill quadrangle, Maine 07-4, Significant sand and gravel aquifers in the Salsbury Cove quadrangle, Maine 07-6, Significant sand and gravel aquifers in the Penobscot quadrangle, Maine 07-35, Significant sand and gravel aquifers in the Branch Lake quadrangle, Maine Added polygons for the following MGS publications: 07-41, Significant sand and gravel aquifers in the Rocky Mountain NW quadrangle, Maine 07-43, Significant sand and gravel aquifers in the Beau Lake quadrangle, Maine 07-45, Significant sand and gravel aquifers in the Hafey Pond quadrangle, Maine 07-47, Significant sand and gravel aquifers in the Estcourt quadrangle, Maine 07-49, Significant sand and gravel aquifers in the Rocky Brook quadrangle, Maine 07-51, Significant sand and gravel aquifers in the Landry quadrangle, Maine

Process Date

20070405

Contact Organization

Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Address Type

mailing

Address

22 State House Station

City

Augusta

State or Province

Postal Code

04333-0022

Country

Contact Voice Telephone

207-287-2801

Process Description

Replaced aquifer polygon sources for the following MGS publications: 08-57, Significant sand and gravel aquifers in the Bangor quadrangle, Maine (supersedes 01-9). 08-58, Significant sand and gravel aquifers in the West Paris quadrangle, Maine (supersedes 98-212). 08-87, Significant sand and gravel aquifers in the Old Town quadrangle, Maine (supersedes 01-188). Updated/replaced aquifer polygons for the following MGS publications: 08-54, Significant sand and gravel aquifers in the Big Shanty Mountain quadrangle, Maine (supersedes 98-59). 08-55, Significant sand and gravel aquifers in the Jo Mary Mountain quadrangle, Maine (supersedes 98-66). 08-59, Significant sand and gravel aquifers in the Turner Center quadrangle, Maine (supersedes 98-221). 08-61, Significant sand and gravel aquifers in the Livermore Falls quadrangle, Maine (supersedes 98-218). 08-67, Significant sand and gravel aquifers in the Wayne quadrangle, Maine (supersedes 04-79). 08-84, Significant sand and gravel aquifers in the Bryant Pond quadrangle, Maine (supersedes 98-208). 08-85, Significant sand and gravel aquifers in the Hay Mountain quadrangle, Maine (supersedes 98-11). 08-86, Significant sand and gravel aquifers in the Veazie quadrangle, Maine (supersedes 01-262). Added aquifer polygons for the following MGS publications: 08-19, Significant sand and gravel aquifers in the Caribou Lake North quadrangle, Maine. 08-21, Significant sand and gravel aquifers in the Caribou Lake South quadrangle, Maine. 08-23, Significant sand and gravel aquifers in the Farrar Mountain quadrangle, Maine. 08-25, Significant sand and gravel aquifers in the Harrington Lake quadrangle, Maine. 08-27, Significant sand and gravel aquifers in the Pine Stream Flowage quadrangle, Maine. 08-29, Significant sand and gravel aquifers in the Rainbow Lake West quadrangle, Maine. 08-31, Significant sand and gravel aquifers in the Wadleigh Mountain quadrangle, Maine.

Process Date

20080318

Contact Organization

Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Address Type

mailing

Address

22 State House Station

City

Augusta

State or Province

Postal Code

04333-0022

Country

Contact Voice Telephone

207-287-2801

Process Description

Process Date

20090213

Contact Organization

Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Contact Voice Telephone

207-287-2801

Process Description

Replaced aquifer polygon sources for the following MGS publications: 09-53, Significant sand and gravel aquifers in the New Portland quadrangle, Maine (supersedes 01-174). 09-54, Significant sand and gravel aquifers in the Pushaw Lake quadrangle, Maine (supersedes 01-208). 09-55, Significant sand and gravel aquifers in the North Whitefield quadrangle, Maine (supersedes 00-7). 09-56, Significant sand and gravel aquifers in the Kenduskeag quadrangle, Maine (supersedes 01-107). Updated/replaced aquifer polygons for the following MGS publications: 09-50, Significant sand and gravel aquifers in the East Pittston quadrangle, Maine (supersedes 99-37). 09-51, Significant sand and gravel aquifers in the Chemo Pond quadrangle, Maine (supersedes 01-39). 09-52, Significant sand and gravel aquifers in the Hopkins Pond quadrangle, Maine (supersedes 00-174).

Process Date

20090707

Process Description

Removed aquifer polygons for the following MGS publications: 11-5, Significant sand and gravel aquifers in the Hampden quadrangle, Maine (01-81). Added aquifer polygons for the following MGS publications: 11-1, Significant sand and gravel aquifers in the West Rockport quadrangle, Maine.

Process Date

20110624

Process Description

Updated/replaced aquifer polygons for the following MGS publications: 11-29, Significant sand and gravel aquifers in the Green Lake quadrangle, Maine (supersedes 01-73). 11-48, Significant sand and gravel aquifers in the Ellsworth quadrangle, Maine (supersedes 00-200). 11-49, Significant sand and gravel aquifers in the Hancock quadrangle, Maine (supersedes 00-202). 11-50, Significant sand and gravel aquifers in the Branch Lake quadrangle, Maine (supersedes 07-35). 11-51, Significant sand and gravel aquifers in the Orland quadrangle, Maine (supersedes 01-194). 11-53, Significant sand and gravel aquifers in the Brewer Lake quadrangle, Maine (supersedes 01-23). 11-59, Significant sand and gravel aquifers in the Bucksport quadrangle, Maine (supersedes 01-29).

Process Date

20110920

Process Description

Added aquifer polygons for the following MGS publications:12-14, Significant sand and gravel aquifers in the Newbury Neck quadrangle, Maine.Updated/replaced aquifer polygons for the following MGS publications:12-18, Significant sand and gravel aquifers in the Ellsworth quadrangle, Maine (supersedes 11-48).12-17, Significant sand and gravel aquifers in the Otter Chain Ponds quadrangle, Maine (supersedes 01-196).12-19, Significant sand and gravel aquifers in the Union quadrangle, Maine (supersedes 00-9).

Process Date

20120828

Direct Spatial Reference Method

Vector

SDTS Point and Vector Object Type

GT-polygon composed of chains

Point and Vector Object Count

10469

Map Projection Name

Transverse Mercator

Scale Factor at Central Meridian

0.9996

Longitude of Central Meridian

-69.0

Latitude of Projection Origin

0.0

False Easting

500000.0

False Northing

0.0

Planar Coordinate Encoding Method

coordinate pair

Abscissa Resolution

0.00012800000011920932

Ordinate Resolution

0.00012800000011920932

Planar Distance Units

Horizontal Datum Name

D North American 1983

Ellipsoid Name

GRS 1980

Semi-major Axis

6378137.0

Denominator of Flattening Ratio

298.257222101

Entity Type Label

GISEDIT.MEMGS.aquifer_polygons

Entity Type Definition

polygon feature class

Entity Type Definition Source

ESRI

Attribute Label

OBJECTID

Attribute Definition

internal feature number

Attribute Definition Source

ESRI

Unrepresentable Domain

Sequential unique whole numbers that are automatically generated.

Beginning Date of Attribute Values

Attribute Label

Shape

Attribute Definition

feature geometry

Attribute Definition Source

ESRI

Unrepresentable Domain

Coordinates defining the features.

Beginning Date of Attribute Values

Attribute Label

PUBCODE

Attribute Definition

Maine Geological Survey publication code/ordering number for the published significant aquifer open-file map

Attribute Definition Source

MGS

Beginning Date of Attribute Values

Attribute Label

ATYPE

Attribute Definition

aquifer polygon classification

Attribute Definition Source

MGS

Enumerated Domain Value

Enumerated Domain Value Definition

area not mapped as aquifer

Enumerated Domain Value

Enumerated Domain Value Definition

aquifer expected to yield 10-50 gallons-per-minute to a properly constructed well

Enumerated Domain Value

Enumerated Domain Value Definition

aquifer expected to yield greater than 50 gallons-per-minute to a properly constructed well

Enumerated Domain Value

Enumerated Domain Value Definition

island of non-aquifer material within an area mapped as aquifer

Beginning Date of Attribute Values

Attribute Label

AUTHOR

Attribute Definition

author(s) of the published significant aquifer open-file map

Attribute Definition Source

MGS

Beginning Date of Attribute Values

Attribute Label

PUBDATE

Attribute Definition

publication date of the published significant aquifer open-file map

Attribute Definition Source

MGS

Beginning Date of Attribute Values

Attribute Label

TITLE

Attribute Definition

title of the published significant aquifer open-file map

Attribute Definition Source

MGS

Beginning Date of Attribute Values

Attribute Label

SOURCE

Attribute Definition

source for the published significant aquifer open-file map

Attribute Definition Source

MGS

Beginning Date of Attribute Values

Attribute Label

AQUIFERID

Beginning Date of Attribute Values

Attribute Label

HISTORY

Beginning Date of Attribute Values

Attribute Label

GlobalID

Beginning Date of Attribute Values

Attribute Label

SHAPE.area

Beginning Date of Attribute Values

Attribute Label

SHAPE.len

Beginning Date of Attribute Values

Entity and Attribute Overview

Attribute table for aquifer polygons.

Entity and Attribute Overview

Attribute table for aquifer polygons.

Metadata Reference Information

Metadata Date

20121012

Metadata Contact

Contact Organization	Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)
Contact Person	Director, Earth Resource Information
Address Type	mailing
Address	22 State House Station
City	Augusta
State or Province	ME
Postal Code	04333-0022
Country	US
Contact Voice Telephone	207-287-2801

Metadata Standard Name

FGDC Content Standard for Digital Geospatial Metadata

Metadata Standard Version

FGDC-STD-001-1998

Metadata Time Convention

local time