Soi ls and Stabi l i ty

Haddock IslandKelp Ledge

Little EggRock Shoals

NortheastPoint

Ledges

Cow IslandDry Ledges

Egg RockNorth Ledge

Egg RockSouth Ledge

HaddockIsland Ledge

Gunning Rock Shoal

Pola

ndLe

dge

s

PumpkinCove Ledge

WebberNorthLedge

SoutheastBreaker

GooseRock Ledge

Old CilleyLedge

Salt PondLedge

Bay CoveLedge

Mosquito Ledge

Pemaquid Ledge

Midway Rocks

RoaringBull

JenksLedge

KelpLedges

AllenShoal

InnerLedge

Gig Rock

Garden IslandSouth Ledge

New HarborSunken Ledges

Cow IslandSunken Ledges

Little FranklinLedge

New HarborDry Ledges

CrotchIslandLedges

MetinicIsland Ledge

NortheastPoint Reef

NortonIsland Ledges

WebberSunkenLedge

WreckIsland Ledges

BlackIsland Ledge

Clark IslandLedge

Hart IslandLedges

OtterIslandLedge

LongIslandLedges

HarborIslandRock

Cow IslandLedges

BrownsHeadLedge

PolinsEast

Ledge

BeyerShip Ledge

Inner Shag LedgeOuter Shag Ledge

HogIslandLedge

Webber DryLedge

Bar IslandLedge

Sunken DuckRock

Old HorseLedge

Old WomanLedge

HendersonLedge

Gull Rock Ledge

Old HumpLedge

MarshallLedge

HalftideLedge

HogIsland Bar

ThrumcapLedge

GangwayLedge

HarpoonLedge

Old ManLedge

SeaveyLedges

GriffinLedge

HaddockLedge

ThompsonRock

HavenerLedge

Middle Ledges

Polins Ledges

BaileyLedge

Barter Shoal

HupperShoal

ChannelRock

MurrayLedge

CoombsLedge

DevilsElbow

AllenLedge

Hough Ledge

MorseLedge

Seal Ledges

ShagLedges

DavisShoal

SouthLedge

Moser Ledge

SealLedges

DevilsBack

DevilsLimb

BlackRockCarey Rock

DryLedges

HartLedge

Long Ledge

WashLedge

RamLedges

Round Rock

Gull Rock

Hay Ledge

The Kegs

Otter

Islan

dPa

ssag

e

Hocko

mock Cha

nnel

OldH

ump Cha

nnel

Flyi

ngPa

ssag

e

Keen

e Nar

rows

Lower Narro

ws

Davis

Strait

TheNarr

ows

P E N O B S C OT B AY

M U S C O N G U S B AY

KN

OX

CO

UN

TY

CO

UN

TY

LI N

CO

LN

Fort St.George

Little Griffen Isand

OarIsland

BensIsland

Little CaldwellIslands

Killick StoneIsland

Smutty Nose IslandMonhegan

Island

WhartonIsland

Seavey Island

SandIsland

TeelIsland

FriendshipLong Island

Little Burnt Island

Jones GardenIsland

BremenLongIsland

WolsgroverIsland

Eastern Duck Rock

CranberryIsland

EasternEgg Rock

WesternEgg Rock

CaldwellIsland

Franklin Island

GarrisonIsland

Little EggRock

MosquitoIsland

ThompsonIsland

Inner Duck Rock

ThrumcapIsland

BlubberIsland

TwobushIsland

Crotch Islands

HaddockIsland

JohnsonIsland

Barter Island

Benner Island

CrotchIsland

GunningRocksHarbor

Island

HupperIsland

HungryIsland

Indian Island

Little Island

LocustIsland

MananaIsland

Palmer Island

AllenIsland

Black Island

BurntIsland

CedarIsland

Crane Island

Davis Island

EagleIsland

McGeeIsland

MorseIsland

OtterIsland

Shark Island

Stone Island

The Brothers

HardyIsland

LoudsIsland

Marsh Island

Thief Island

Wreck IslandHall Island

Hart Island

TomsIsland

Clam Island

Crow Island

Jims Island

RossIsland

Bar Island

Black Rock

GayIsland

GooseRock

RamIsland

Ram Island

Bar Island

Cow Island

Duck Rocks

HogIsland

RamIsland

Nubbins

Monhegan

SouthThomaston

Thomaston

Friendship

SaintGeorge

Bremen

Cushing

Bristol

Warren

Waldoboro

FriendshipHarbor

MonheganHarbor

GayCove

FalseWhitehead

Harbor

Port ClydeHarbor

MeetinghouseCove

MapleJuice Cove

Browns HeadCove

MuscongusHarbor

HarringtonCove

MosquitoHarbor

Back RiverCove

Mus

cong

usSo

und

PemaquidHarbor

GeorgesHarbor

Tenants Harbor

ChristmasCove

MartinPoint

GreenlandCove

BallyhacCove

Drinking Cove

HornbarnCove

FossettsCove

PitchersCove

HatchetCove

RackliffBay

DeadmanCove

HavenerCove

LobsterCove

Marsh Harbor

PumpkinCove

SampsonCove

CutlerCove

DelanoCove

Seal Harbor

SeaveyCove

Turkey Cove

Wheeler Bay

BrownsCove

CoombsCove

BroadCove

ClarkCove

DavisCove

HylerCove

NabbyCove

WattsCove

WileyCove

Broad Cove

MoxieCove

New Harbor

RoundPond

AmesCove

DeepCove

Long Cove

MillCove

OtisCove

TeelCove

BackCove

Johns Bay

LongCove

LongCove

BaumBay

Med

omak

Rive

r

St. G

eorg

eRi

ver

Goo

seRi

ver

Weskeag River

Oys

ter R

iver

Med

unco

okRiv

er

KalersPond

SidesparkerPond

SevenTreePond

North

Pond

South Pond

MedomakPond

Pem

aqui

dPo

nd

Web

ber P

ondBisc

ayPo

nd

Boyd

Pond

LittleMedomakPond

CrawfordPond

HavenerPond

Duck PuddlePond 1

1

32

32

32

97

97

73

90

32

130

220

131

131

131

235

220

1:150,000

¢Miles

Kilometers

0 2 4 6

0 1 2 3 4

MAP 7

Hydric

Highly permeableHighly erodible

Coastal bluff stabilityLandslide risk areaLandslide site

Highly unstable face

Soil characteristics

Digital Data Sources: Maine Office of GIS QLF- Center for Community GIS, 2008Map created by:

16

Soils and Stabil i ty

Map backgroundMaps illustrating the distribution of soil types on land are regularly used to assess the suitability of certain areas to different uses (e.g. different kinds of farming) or where particular plant communities might be found. Terrestrial soil maps can also provide information for marine managers because soil type influences the impacts of land use on the sea as well as ocean forces on the land.

To create this map, scientists from Maine were asked what qualities of coastal soils were most relevant to the management of nearshore waters. They agreed that soils which are considered drained, hydric, or erodible were of greatest interest as were clay soils which, when found in high, steep bluffs, contribute to the potential for landslides.

Several government agencies have categorized and mapped coastal areas according to these and other specific characteristics. This map provides a generalized view of the distribution and patterns of these characteristics. (Please note that for management purposes, more localized information is necessary.) Also, in the interest of clarity, within each characteristic only the most extreme condition is shown (e.g. highly erodible rather than moderately erodible). Other levels of each condition, however, have also been mapped and can be obtained from the sources listed below.

For more information on landslides and erosion of coastal bluffs, begin with the Maine Geological Survey in the Dept. of Conservation (www.maine.gov/doc/nrimc/mgs/pubs/index.htm). Further information on area soils can be obtained from the Natural Resources Conservation Service in the U.S. Dept. of Agriculture (soils.usda.gov). This federal agency also has an office in Warren, Maine.

Legend detail

Coastal bluff stability

Landslide risk area: A generalized site where an assessment of features suggest conditions that may be suitable to landslide formation. Landslide potential relates to the internal stability of a coastal bluff segment and the potential for gravity, under certain conditions, to move large amounts of sediment down-slope. Areas prone to landslides tend to have high, steep bluff faces, clay sediment, erosion at the high tide line, and a high groundwater table.

Landslide site: Areas where a landslide has occurred. Some events may have occurred in the last few years, some in the last century, and some thousands of years ago. Sites are documented through historical records, eyewitness accounts or aerial photography.

Highly unstable face: A generalized site where the bluff face shows signs of erosion including little vegetation, exposure of bare sediment, fallen trees and displaced chunks of sediment. To understand the hazard posed to coastal development (i.e. by the landward retreat of the top edge of the bluff) an understanding of local erosion rates is needed.

Soil characteristics

Highly erodible: Sites where the potential for soil erosion is high according to the soil erodibility index, a numerical formula which considers physical and chemical properties of the soil as well as the climatic conditions where it is located.

Highly permeable: Places where water is removed from the soil rapidly. They are commonly coarse textured, rocky, or shallow. Some are steep.

Hydric: Locations where soils are saturated, flooded, or ponded long enough during the growing season to develop anaerobic conditions. They are associated with the development of wetland communities.

Data sources

Features Information Source Digital Data Source

Coastal bluff stability Maine Geological SurveyMaine Office of GIS (COASTAL_BLUFF_HAZARDS)http://apollo.ogis.state.me.us/catalog/

Soil characteristicsU.S. Department of Agriculture-Natural Resources Conservation Service

Maine Office of GIS (SSA_S)http://apollo.ogis.state.me.us/catalog/

Muscongus Bay Atlas

Soi ls and Stabi l i ty

Haddock IslandKelp Ledge

Little EggRock Shoals

NortheastPoint

Ledges

Cow IslandDry Ledges

Egg RockNorth Ledge

Egg RockSouth Ledge

HaddockIsland Ledge

Gunning Rock Shoal

Pola

ndLe

dge

s

PumpkinCove Ledge

WebberNorthLedge

SoutheastBreaker

GooseRock Ledge

Old CilleyLedge

Salt PondLedge

Bay CoveLedge

Mosquito Ledge

Pemaquid Ledge

Midway Rocks

RoaringBull

JenksLedge

KelpLedges

AllenShoal

InnerLedge

Gig Rock

Garden IslandSouth Ledge

New HarborSunken Ledges

Cow IslandSunken Ledges

Little FranklinLedge

New HarborDry Ledges

CrotchIslandLedges

MetinicIsland Ledge

NortheastPoint Reef

NortonIsland Ledges

WebberSunkenLedge

WreckIsland Ledges

BlackIsland Ledge

Clark IslandLedge

Hart IslandLedges

OtterIslandLedge

LongIslandLedges

HarborIslandRock

Cow IslandLedges

BrownsHeadLedge

PolinsEast

Ledge

BeyerShip Ledge

Inner Shag LedgeOuter Shag Ledge

HogIslandLedge

Webber DryLedge

Bar IslandLedge

Sunken DuckRock

Old HorseLedge

Old WomanLedge

HendersonLedge

Gull Rock Ledge

Old HumpLedge

MarshallLedge

HalftideLedge

HogIsland Bar

ThrumcapLedge

GangwayLedge

HarpoonLedge

Old ManLedge

SeaveyLedges

GriffinLedge

HaddockLedge

ThompsonRock

HavenerLedge

Middle Ledges

Polins Ledges

BaileyLedge

Barter Shoal

HupperShoal

ChannelRock

MurrayLedge

CoombsLedge

DevilsElbow

AllenLedge

Hough Ledge

MorseLedge

Seal Ledges

ShagLedges

DavisShoal

SouthLedge

Moser Ledge

SealLedges

DevilsBack

DevilsLimb

BlackRockCarey Rock

DryLedges

HartLedge

Long Ledge

WashLedge

RamLedges

Round Rock

Gull Rock

Hay Ledge

The Kegs

Otter

Islan

dPa

ssag

e

Hocko

mock Cha

nnel

OldH

ump Cha

nnel

Flyi

ngPa

ssag

e

Keen

e Nar

rows

Lower Narro

ws

Davis

Strait

TheNarr

ows

P E N O B S C OT B AY

M U S C O N G U S B AY

KN

OX

CO

UN

TY

CO

UN

TY

LI N

CO

LN

Fort St.George

Little Griffen Isand

OarIsland

BensIsland

Little CaldwellIslands

Killick StoneIsland

Smutty Nose IslandMonhegan

Island

WhartonIsland

Seavey Island

SandIsland

TeelIsland

FriendshipLong Island

Little Burnt Island

Jones GardenIsland

BremenLongIsland

WolsgroverIsland

Eastern Duck Rock

CranberryIsland

EasternEgg Rock

WesternEgg Rock

CaldwellIsland

Franklin Island

GarrisonIsland

Little EggRock

MosquitoIsland

ThompsonIsland

Inner Duck Rock

ThrumcapIsland

BlubberIsland

TwobushIsland

Crotch Islands

HaddockIsland

JohnsonIsland

Barter Island

Benner Island

CrotchIsland

GunningRocksHarbor

Island

HupperIsland

HungryIsland

Indian Island

Little Island

LocustIsland

MananaIsland

Palmer Island

AllenIsland

Black Island

BurntIsland

CedarIsland

Crane Island

Davis Island

EagleIsland

McGeeIsland

MorseIsland

OtterIsland

Shark Island

Stone Island

The Brothers

HardyIsland

LoudsIsland

Marsh Island

Thief Island

Wreck IslandHall Island

Hart Island

TomsIsland

Clam Island

Crow Island

Jims Island

RossIsland

Bar Island

Black Rock

GayIsland

GooseRock

RamIsland

Ram Island

Bar Island

Cow Island

Duck Rocks

HogIsland

RamIsland

Nubbins

Monhegan

SouthThomaston

Thomaston

Friendship

SaintGeorge

Bremen

Cushing

Bristol

Warren

Waldoboro

FriendshipHarbor

MonheganHarbor

GayCove

FalseWhitehead

Harbor

Port ClydeHarbor

MeetinghouseCove

MapleJuice Cove

Browns HeadCove

MuscongusHarbor

HarringtonCove

MosquitoHarbor

Back RiverCove

Mus

cong

usSo

und

PemaquidHarbor

GeorgesHarbor

Tenants Harbor

ChristmasCove

MartinPoint

GreenlandCove

BallyhacCove

Drinking Cove

HornbarnCove

FossettsCove

PitchersCove

HatchetCove

RackliffBay

DeadmanCove

HavenerCove

LobsterCove

Marsh Harbor

PumpkinCove

SampsonCove

CutlerCove

DelanoCove

Seal Harbor

SeaveyCove

Turkey Cove

Wheeler Bay

BrownsCove

CoombsCove

BroadCove

ClarkCove

DavisCove

HylerCove

NabbyCove

WattsCove

WileyCove

Broad Cove

MoxieCove

New Harbor

RoundPond

AmesCove

DeepCove

Long Cove

MillCove

OtisCove

TeelCove

BackCove

Johns Bay

LongCove

LongCove

BaumBay

Med

omak

Rive

r

St. G

eorg

eRi

ver

Goo

seRi

ver

Weskeag River

Oys

ter R

iver

Med

unco

okRiv

er

KalersPond

SidesparkerPond

SevenTreePond

North

Pond

South Pond

MedomakPond

Pem

aqui

dPo

nd

Web

ber P

ondBisc

ayPo

nd

Boyd

Pond

LittleMedomakPond

CrawfordPond

HavenerPond

Duck PuddlePond 1

1

32

32

32

97

97

73

90

32

130

220

131

131

131

235

220

1:150,000

¢Miles

Kilometers

0 2 4 6

0 1 2 3 4

MAP 7

Hydric

Highly permeableHighly erodible

Coastal bluff stabilityLandslide risk areaLandslide site

Highly unstable face

Soil characteristics

Digital Data Sources: Maine Office of GIS QLF- Center for Community GIS, 2008Map created by:

Muscongus Bay Atlas 17