Contra Costa County

Alameda County

Contra Costa County

Alameda County

Alameda County

Santa Clara County

San

J oaq

u in

Cou

nty

A

lam

eda

Cou

nty

Alameda County

Santa Clara County

N

EW

S

2 0 2 4 6 Miles

Data sources: Alameda County Flood Control and Water Conservation District; ACCWP; Zone 7 Water Agency; U.S. Census Bureau; U.S. Geological Survey; William Lettis Associates (Oakland Museum creek and watershed mapping project); Balance Hydrologics and EIP Associates (Proposed test of the approach for the ACCWP HMM Preliminary Map, July 2003)

LEGEND (see text also)

Attachment A:HMP susceptibility map

Alameda Countywide Clean Water ProgramNovember 13, 2006

Not included in HMPTidally influenced / depositional - exemptHill or high slope region (susceptible)Special consideration - Codornices CreekSpecial consideration - San Lorenzo & Alameda Creeks

StreetsCounty boundary

Enclosed pipe or culvertEngineered channel - concreteEngineered channel - materials unknownEarthen channel or connectorNatural creek or stream (susceptible)

Major watershedsMajor highways

Channel type

SAN TA

CLA RA

Coyote Creek

Guadalupe RiverLos Gatos Creek

Stevens Creek

Ad

obe Cree k

Calaba

zas Cr

eek

Saratoga Cree

kSan Felipe Cre ek

San

Tomas

Aquino

C

reek

Permanente Creek

Fis her Cre ek

Ross Cr eek

Alamitos CreekBe rryessa Creek

Canoa s Creek

Matader

o Creek

Thompson Creek

Las Animas Creek

Upper Penitencia Creek

Upper Silver Creek

Guadalupe Creek

Los Trancos Creek

Barro

n Cree

k

Flint CreekSunn

yvale

East

Chan

nel

San Francisquito Creek

Lower Silver Creek

H a le C

reek

Shingle Creek

Miguelita Creek

Packwood C reek

Fowler Creek

Calera

Creek

Soda Spring Creek

Arroyo Calero Creek

Norwood Creek

Guadalupe Slough

South Babb Creek

Regnart Creek

Golf Creek

Cow Creek

Los Coches Creek

Carlin Canyon Creek

Bayfr

ont Levee

Sierr a C reek

Hoover CreekLimekin Canyon

Herbert Creek

Randol Creek

Arroyo Aguague Creek

Swiss Creek

Rincon CreekHendrys Creek

Daves Creek

Austrian Gulch

San Andreas Creek

Dry Creek

Sweigert Creek

Ohlone Creek

East Ross Creek

LegendMajor CreeksContinuously Hardened ChannelMajor RoadsOutside SCVURPPP JurisdictionCatchments Draining to Hardened Channel and/or Tidal AreasCatchments and Subwatersheds greater than or equal to 65% ImperviousAreas Under ReviewBaylandsSubwatersheds less than 65% ImperviousReservoirs in Santa Clara Basin

March, 2009SCVURPPP

0 5 102.5 Miles

Classification of Subwatersheds and Catchment Areasfor Determining Applicability of HMP Requirements

This map contains: 1) a revision to the November 2007 version to correct a mapping error; and 2) two revisions to Areas Under Review in Palo Alto and North Santa Clara County to reflect updated impervious surface data, consistent with the HM applicability criteria set forth in Attachment F, Section 4 of the MRP

±

SOUTH SAN FRANCISCO

SAN BRUNO

DALY CITY

PACIFICA

BRISBANE

COLMA

MILLBRAE

HILLSBOROUGHFOSTER CITY

HIGHLANDS

ATHERTON

MENLO PARK

EAST PALO ALTO

WOODSIDE

HALF MOON BAY

MONTARA

ALVARADO AVE

EL CAMINO REALBERNAL AVE

CA R

ME LI TA A V E

Pulgas Creek

EL CAM

INO REA

L

SAN

CA R

LOS

AVE

E ATON AV E

CEDAR ST

31S T A VE

S EL CAMINO

RE AL

ALAM

EDA

DE L A

S PULG

AS

VIR G IN IA A

V E

HAR

VA RD

RD

VIR

GI NI

A AV

E

W 5T

H A VE

S EL

CAMIN

O R E

AL

RA

Y DR

QUES A

D A WA Y

MI LL

W O OD D

RBAR

CEL

O NA D

R

LAU R

E L AVE

CR

YST AL

SPR

I NGS

AVE

CUN

N ING

H AM

W AY

SH A RP

P AR K R DH

WY 1

CL AR EN D ON R D

US 101

EL CAMINO REAL

ALAMED

A DE LAS PU

LGAS

HW

Y 1

EL GRANADA

REDWOOD CITY

BURLINGAME

SAN MATEO

BELMONT

SAN CARLOS

I-280

San Francisco BayPacific Ocean

HM Control Area MapRevised March 27, 2009

Area Subject to HMP

Hardened Channels

Exempted AreasImpervious Areas ( >65%)Low Gradient Areas

Streets

Jurisdictional Boundary

San Mateo County

Channel TypeUnhardened

Hardened

Major Roads and Highways

Legend

0 1 2 3 4 5 Miles

N