South

River Raritan

River

Chesapeake and Delaware Canal

CONEY ISLAND

PLAINFIELD

PERTH AMBOY

ARTHUR KILL

THE NARROWS

BOUND BROOK

RARITAN

RIEGELSVILLE

FRENCHTOWN

PITTSTOWN

FLEMINGTON

SANDY HOOK

KEYPORT

SOUTH AMBOY

MONMOUTH JUNCTION

NEW BRUNSWICK

HOPEWELL

ROCKY HILL

LUMBERVILLE

STOCKTON

LONG BRANCH

FREEHOLD

MARLBORO

HIGHTSTOWN

JAMESBURG

LAMBERTVILLE

PENNINGTON

PRINCETON

ASBURY PARK

FARMINGDALE

ROOSEVELT

ADELPHIA

ALLENTOWN

TRENTON EAST

TRENTON WEST

POINT PLEASANT

LAKEWOOD

NEW EGYPT

CASSVILLE

LAKEHURST

COLUMBUS

BRISTOL

FRANKFORD

BEVERLY

SEASIDE PARK

TOMS RIVER

KESWICK GROVE

WHITING

BROWNS MILLS

PEMBERTON

PHILADELPHIA

MOUNT HOLLY

CAMDEN

MOORESTOWN

BARNEGAT LIGHT

MARCUS HOOK

WOODMANSIE

BROOKVILLE

FORKED RIVER

CHATSWORTH

BRIDGEPORT

INDIAN MILLS

WOODBURY

MEDFORD LAKES

RUNNEMEDE

CLEMENTON

LONG BEACH NE

SHIP BOTTOM

WEST CREEK

WILMINGTON SOUTH

OSWEGO LAKE

PENNS GROVE

WOODSTOWN

JENKINS

ATSION

PITMAN WEST

HAMMONTON

PITMAN EAST

WILLIAMSTOWN

BEACH HAVEN

TUCKERTON

DELAWARE CITY

SALEM

NEW GRETNA

GREEN BANK

ALLOWAY

EGG HARBOR CITY

ELMER

NEWTONVILLE

NEWFIELD

BUENA

BRIGANTINE INLET

TAYLORS BRIDGE

OCEANVILLE

CANTON

PLEASANTVILLE

SHILOH

MAYS LANDING

BRIDGETON

DOROTHY

MILLVILLE

FIVE POINTS

BOMBAY HOOK

OCEAN CITY

ATLANTIC CITY

BEN DAVIS POINT

MARMORA

CEDARVILLE

TUCKAHOE

DIVIDING CREEK

PORT ELIZABETH

SEA ISLE CITY

FORTESCUE

WOODBINE

PORT NORRIS

HEISLERVILLE

STONE HARBOR

AVALON

RIO GRANDE

CAPE MAY

WILDWOOD

CAPE HENLOPEN

ST GEORGES

MIDDLETOWN

CLAYT0N

SMYRNA

KENTON

DOVER

MARYDEL

WYOMING

HICKMAN

GREENWOOD

HARRINGTON

HOBBS

DENTON

BURRSVILLE

GOLDSBORO

SUDLERSVILLE

MILLINGTON

CECILTON

ELKTON

NEWARK EAST

NEWARK WEST

WEST GROVE

KENNETT SQUARE

WILMINGTON NORTH

LITTLE CREEK

FREDERICA

BENNETTS PIER

MILFORD

MISPILLION RIVER

ELLENDALE

MILTON

LEWES

GARDEN

STATE

PARKWAY

GARDEN

STATE

PARKWAY

ATLANTIC

CITY

EXPRESSWAY

NEW

JERSEY

TURNPIKE

NEW

JERSEY

TURNPIKE

9

9

9

1

130

130

95

195

195

40

322

30

322

30

40

47

130

295

206

206

295

206

202

287

Raritan Bay

Delaware Bay

Delaware

River

Sch

uylkill River

ATLANTIC

OCEAN

PENNSYLVANIA

NEW JERSEY

DELAWARE

NEW YORK

MARYLAND

CAMDEN

GLOUCESTER

SALEM

ATLANTIC

CUMBERLAND

CAPE MAY

PHILADELPHIA

OCEAN

BURLINGTON

MERCER MONMOUTH

MIDDLESEX

KENT

SUSSEX

NEW CASTLE

SOMERSET

HUNTERDON

BUCKS

DELAWARE

Glendola

Reservoir

CAROLINE

CECIL

KENT

QUEEN ANNE'S

Swimming River

Reservoir

Manasquan

Reservoir

Flemington

Lambertville

Princeton

Trenton

Hightstown

Somerville

Bound Brook

New Brunswick

Edison

Sayerville

East Brunswick

Jamesburg

Freehold

Matawan

Atlantic Highlands

Clarksburg

Red Bank

Long Branch

Eatontown

Asbury Park

Avon-by-the-Sea

Spring Lake Heights

Brielle

Point Pleasant

Toms River

Lavallette

Lakewood

New Egypt

Browns Mills

Mount Holly

Medford Lakes Forked River

Barnegat Light

Manahawkin

Ship Bottom

Tuckerton

Beach Haven

Egg Harbor City

Mays Landing

Pleasantville

Atlantic City

Ventnor City

Margate City

Ocean City

Woodbine

Millville

Cape May

Court House Avalon

Wildwood

Cape May

Rio Grande

Bridgeton

Vineland

Salem

Wilmington Penns Grove

Pennsville Woodstown

Glassboro

Gibbstown

Woodbury

Berlin

Hammonton

Camden

Moorestown

Willingboro

Burlington

Dover

Marlboro

Keansburg

Farmingdale

Brigantine

Seaside Park

Buena

Somerdale

Pine Hill

Brick

Evesham

Stone Harbor

Clayton

Newark

Middletown

Bay Head

Mullica Hill

Odessa

75o30' 75o 74o30' 74o

40o

40o

30'

39o

39o

30'

Base modified from U.S. Geological Survey digital data, 1:100,000, 1983,

Universal Transverse Mercator Projection, Zone 18 8 6 4 2 0 8 MILES

8 6 4 2 0 8 KILOMETERS

UPDIP LIMIT OF COASTAL PLAIN SEDIMENTS

-20

-20

20

0

0

09-304

-19

09-71

-24

09-305

-21

11-737

1

09-415

7

09-149

18

01-219

34

09-519

-25

29-775

-1

29-813

3

29-1621

-19

09-67

-33

09-526

-18

Potentiometric Surface of the Cohansey aquifer and the Rio Grande water-bearing zone, 2003

U.S. Department of the Interior

U.S. Geological Survey 

Prepared in cooperation with the

New Jersey Department of Environmental Protection

By

Vincent T. dePaul, Robert Rosman, and Pierre J. Lacombe

2009

09-304

-19

09-305

-21

09-526

-18

20

EXPLANATION

U.S. Geological Survey 7.5-minute quadrangle and name

Outcrop of the Kirkwood Formation

Potentiometric contour—Shows altitude at which water would have 

 stood in a tightly cased well. Dashed where approximate. Contour 

 interval 20 feet

Estimated location of 250-milligram-per-liter line of equal 

chloride concentration (Modified from Lacombe and Rosman, 2001)

Approximate updip limit of the Rio Grande water-bearing zone

Surface-water freshwater-saltwater interface (Adapted from

 U.S. Fish and Wildlife Service digital wetland data, 1990)

Production well—Upper number is well number; lower number is 

 water-level altitude, in feet

Observation well—Upper number is well number; lower number is 

 water-level altitude, in feet

Observation well with hydrograph—Upper number is well number;

 lower number is water-level altitude, in feet

ELMER

Scientific Investigations Report 2008-5145

Cohansey aquifer and Rio Grande water-bearing zone—PLATE 1

dePaul, V.T., and others, 2009, Water-Level conditions in selected confined aquifers

of the New Jersey and Delaware Coastal Plain, 2003

Figure 1−2. Potentiometric surface of the Rio Grande water-bearing zone, New Jersey Coastal Plain, 2003.

Maurice

Tuckahoe

Great Egg

Harbor Bay

Cape May Canal

DELAWARE BAY

ATLANTIC OCEAN

Atlantic County

Cumberland County

Base from U.S. Geological Survey digital data, 1:100,000, 1983

Universal Transverse Mercator Projection, Zone 18

0 1 2 3 4 MILES

0 1 2 3 4 KILOMETERS

75° 74°52'30" 74°45' 74°37'30"

39°

15'

39°

07'

30"

39°

00'

River

River

Belleplain

State Forest

Cape May

Court House

Woodbine

Upper Township

Dennis Township

Middle Township

Lower Township

Cape May

Wildwood

Figure 1-1. Potentiometric surface of the Cohansey aquifer, Cape May County, 2003.

DIVIDING

CREEK

PORT ELIZABETH

TUCKAHOE

MARMORA

OCEAN CITY

RT NORRIS

HEISLERVILLE

WOODBINE

SEA ISLE CITY

RIO GRANDE

STONE HARBOR

CAPE MAY

WILDWOOD

AVALON

0

10

20

30

-10

-20

-20

EXPLANATION

U.S. Geological Survey 7.5-minute 

 quadrangle and name

Potentiometric contour—Shows altitude 

 at which water would have stood in a 

 tightly cased well. Dashed where 

 approximate. Contour interval 10 feet

Estimated location of 250-milligram-

 per-liter line of equal chloride 

 concentration (Modified from Lacombe 

 and Rosman, 2001)

Surface-water freshwater-saltwater 

 interface (Adapted from U.S. Fish and 

 Wildlife Service digital wetland data, 

 1990)

Production well—Upper number is well 

 number; lower number is water-level 

 altitude, in feet

Observation well—Upper number is well 

 number; lower number is water-level 

 altitude, in feet

Observation well and with hydrograph—

 Upper number is well number; lower 

 number is water-level altitude, in feet

AVALON

09-99

5

09-353

-8

09-80

-2

09-11

-11

09-301

-10

09-54

-17

09-27

-11

09-297

8

09-325

34

09-317

27

09-350

15

09-308

7

09-207

5

09-233

6

09-281

6

09-219

5

09-99

5

09-358

2

09-315

7

09-292

0

09-354

4

09-385

-10

09-525

-22

09-210

-10

09-52

-14

09-353

-8

09-57

-13

09-395

-15 09-048

-12

09-43

-8

09-49

-11

09-36

-15

09-18

-14

09-30

-13

09-42

-19

09-394

-11 09-159

-6

09-314

1

09-310

3 09-366

-2

09-213

-5

09-89

-2

09-187

-4

09-188

-7

09-492

7

09-402

14

09-372

5

09-412

7

09-520

15

01-835

9

09-256

15

09-518

9

Approximate

u

p

dip limit of the confined

Cohansey

aquifer

Stone 

Harbor

Ocean City

Rio Grande

09-80

-2

09-60

-13

09-150

-10