E C W

heehawultraMécanique

22 févr. 2014 (il y a 3 années et 8 mois)

95 vue(s)

E
ROSION

C
ONTROL

W
ORKSHOP

N
ORTHEAST

W
ISCONSIN


S
TORMWATER

C
ONSORTIUM

O
SHKOSH



J
ANUARY

16

L
ITTLE

C
HUTE



J
ANUARY

23

G
REEN

B
AY



J
ANUARY

30

Surface

Runoff

Surface

Runoff

W
HAT

IS

THE

N
UMBER

1 P
OLLUTANT

THAT

CAN

GET

INTO

OUR

WATERWAYS

AND

HARM

OR

KILL

AQUATIC

LIFE
?

T
OP

P
OLLUTANT

SOIL

#1

S
OURCES

OF

S
EDIMENT

A
GRICULTURAL

S
OURCES

A
GRICULTURAL

S
OURCES

U
RBAN

S
OURCES

C
ONSTRUCTION

S
ITE

S
OURCES

L
AND

U
SES

L
OWER

F
OX

R
IVER

W
ATERSHED

-

2012

S
OURCE
: WDNR
-

L
OWER

F
OX

R
IVER

B
ASIN

TMDL

0.6% Construction Sites
8.7% Urban (non-
regulated)
25.9% Urban (regulated
MS4)
50.2% Agriculture
14.7% Natural Areas
(forest & wetlands)
S
EDIMENT

D
ELIVERY

R
ATES

L
OWER

F
OX

R
IVER

W
ATERSHED

-

2012

S
OURCE
: WDNR
-

L
OWER

F
OX

R
IVER

B
ASIN

TMDL

3.98% Construction Sites
2.55% Urban (non-regulated)
17.86% Urban (regulated MS4)
52.77% Agriculture
0.72% Natural Areas (forest &
wetlands)
0.35% General Permits (includes
production areas from CAFOs)
A
NNUAL

S
EDIMENT

D
ELIVERY

L
OAD

L
OWER

F
OX

R
IVER

W
ATERSHED

-

2012

176,434,787
LBS
/
YR

S
OURCE
: WDNR
-

L
OWER

F
OX

R
IVER

B
ASIN

TMDL

Photo Credit: Steve Seilo, Photodynamix

S
EDIMENT

FROM

C
ONSTRUCTION

S
ITES

L
OWER

F
OX

R
IVER

W
ATERSHED

-

2012

7,015,420
LBS
/
YR

S
OURCE
: WDNR
-

L
OWER

F
OX

R
IVER

B
ASIN

TMDL

S
EDIMENT

FROM

C
ONSTRUCTION

S
ITES

S
EDIMENT

D
ELIVERY

1
ACRE

CONSTRUCTION

=

75
ACRES

CROPLAND

S
OURCE
: WDNR
-

L
OWER

F
OX

R
IVER

B
ASIN

TMDL

E
FFECTS

OF

S
EDIMENT


E
NVIRONMENT


E
CONOMY

E
NVIRONMENTAL

I
MPACTS

W
ATER

Q
UALITY



T
URBIDITY


A
BRASION

(
FISH

GILLS
)


S
ILT


S
COURING

OF

S
TREAM

B
EDS

W
ATER

Q
UALITY

P
OLLUTANTS



P
HOSPHORUS


O
ILS
/G
REASES


M
ETALS


S
ALTS

W
ATER

Q
UALITY


L
OW

D
ISSOLVED

O
XYGEN



A
LGAE

B
LOOMS

H
ABITAT

H
ABITAT

H
ABITAT

H
ABITAT

E
CONOMIC

R
EASONS

F
OR

EVERY

DOLLAR

NOT

SPENT

ON

E
ROSION

C
ONTROL


$10
TO

$15
ARE

SPENT

ON

OFF
-
SITE

IMPACTS

E
CONOMIC

R
EASONS

E
CONOMIC

R
EASONS


P
ROPERTY

L
OSS





S
EDIMENTATION

-

D
REDGING


S
EDIMENTATION

-

D
REDGING

R
EGULATORY

B
ACKGROUND

R
EGULATORY

B
ACKGROUND

F
EDERAL

C
LEAN

W
ATER

A
CT

1972

R
EGULATORY

B
ACKGROUND

S
TORMWATER

D
ISCHARGE

P
ERMIT

-

1988

Implemented
in multiple phases:

1.
Industrial Stormwater

Discharge Permits

2.
Construction Activities disturbing

5 acres or more

3.
Municipal Stormwater

Discharge Permits in

2 phases

1.
Phase I (cities over 100,000)

2.
Phase II (cities 10,000


99,999)


2005


R
EGULATORY

B
ACKGROUND

What is an MS4?



M
unicipal


S
eparate


S
torm


S
ewer


S
ystem

To meet the requirements of the Federal Clean Water Act
MS4s are permitted in Wisconsin through NR 151 & 216


R
EGULATORY

B
ACKGROUND

Permittee
(MS4)
shall
develop,
implement and
enforce a program
to reduce the
discharge of
sediment and
construction
materials from
construction sites.

C
ONSTRUCTION

S
ITE

P
OLLUTANT

C
ONTROL

R
EGULATORY

B
ACKGROUND

C
ONSTRUCTION

S
ITE

P
OLLUTANT

C
ONTROL


Control the sediment load coming off the
construction sites


Control the total suspended solids that
would normally run off the site


Maintain or reduce the peak runoff
discharge rate


Infiltrate water running off the site


Maintain protective areas


Remove all visible sheen from petroleum
product runoff