[EBB Sightings] Fwd: McNabney Marsh draining

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Hi all,
Here is the timely reply of Dick Bogaert out at Mt. View Sanitary District.
Steve Glover
Dublin

In a message dated 8/6/2004 12:21:26 PM Pacific Daylight Time, 
DBogaert at mvsd.org writes:

> Steve:
> 
>   
> 
> The draining of McNabney Marsh is part of the management plan for McNabney 
> Marsh. The channels are now exposed and an accurate, to scale aerial 
> photograph has been taken of the marsh. The exposed channels will next be surveyed for 
> depth and width and a dredging plan will be developed. The dredging of the 
> channels (next summer) will allow faster draining and flooding of the marsh 
> and better water management of the marsh. The drying will also inhibit spread 
> of the cattails. This project was made possible by a grant from California 
> Fish and Game, Office of Spill Prevention and Response.
> 
>   
> 
> I expect to flood the marsh sometime in October.  This will provide the 
> resting area for the migrant ducks. The marsh will remain flooded until about 
> July of next year; the end of the nesting season will determine when the marsh 
> is drained again.
> 
>   
> 
> The background for this project was established years ago. The McNabney 
> Marsh (then locally called Shell Marsh) drained during the summer months and had 
> a varied plant assemblage of salt grass, fathen, pickleweed, brass buttons 
> and few other minor species. Gradual subsidence of the marsh bottom, increased 
> flow from the MVSD treatment plant, gradual silting in and obstruction of the 
> channels and cessation of pumping by the Contra Costa Mosquito and Vector 
> Control District caused the marsh to remain flooded year-round. This situation 
> promotes the growth of cattails and inhibits the growth of other plants. If 
> the situation continued, the marsh would fill in with cattails, a situation 
> that would provide less open water and less forage for water fowl. The 
> overgrowth of cattails would also provide more pockets where mosquito larva could 
> develop and make control of the mosquito breeding areas much more difficult. 
> With the spread of West-Nile virus approaching Contra Costa County, draining the 
> marsh provides a tool to control the development of mosquito breeding 
> pockets with out resort to more labor intensive biological and pesticide methods.
> 
>   
> 
> The  McNabney Marsh Management Advisory Committee will evaluate the 
> effectiveness of the dredging, improvement of  drainage through the railroad culvert 
> and the tide gates, and assess  the whole marsh system. They will then refine 
> the future water management and could include summer draining of McNabney 
> Marsh plain, but not as extensively as this summer.
> 
>   
> 
> I will add your name to the email list for McNabney Marsh Management 
> Advisory Committee meetings. These meetings are open for the public and we would 
> welcome your input.
> 
>   
> 
> Dick
> 
>   
> 
> Mt. View Sanitary District
> 
>  Dick Bogaert
> Wetlands Biologist/Analyst
> 
>  
> 
> 


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=3D"SANSSERIF" FACE=3D"Arial" LANG=3D"0">Hi all,

Here is the timely reply of Dick Bogaert out at Mt. View Sanitary District.<=
BR>
Steve Glover

Dublin

In a message dated 8/6/2004 12:21:26 PM Pacific Daylight Time, DBogaert at mvsd=
.org writes:

: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Steve:

  

#ffffff" SIZE=3D2 PTSIZE=3D10 FAMILY=3D"SERIF" FACE=3D"Times New Roman" LANG=
=3D"0">The draining of McNabney Marsh is part of the management plan for McN=
abney Marsh. The channels are now exposed and an accurate, to scale aerial p=
hotograph has been taken of the marsh. The exposed channels will next be sur=
veyed for depth and width and a dredging plan will be developed. The dredgin=
g of the channels (next summer) will allow faster draining and flooding of t=
he marsh and better water management of the marsh. The drying will also inhi=
bit spread of the cattails. This project was made possible by a grant from C=
alifornia Fish and Game, Office of Spill Prevention and Response.

  

#ffffff" SIZE=3D2 PTSIZE=3D10 FAMILY=3D"SERIF" FACE=3D"Times New Roman" LANG=
=3D"0">I expect to flood the marsh sometime in October.  This will prov=
ide the resting area for the migrant ducks. The marsh will remain flooded un=
til about July of next year; the end of the nesting season will determine wh=
en the marsh is drained again.

  

#ffffff" SIZE=3D2 PTSIZE=3D10 FAMILY=3D"SERIF" FACE=3D"Times New Roman" LANG=
=3D"0">The background for this project was established years ago. The McNabn=
ey Marsh (then locally called Shell Marsh) drained during the summer months=20=
and had a varied plant assemblage of salt grass, fathen, pickleweed, brass b=
uttons and few other minor species. Gradual subsidence of the marsh bottom,=20=
increased flow from the MVSD treatment plant, gradual silting in and obstruc=
tion of the channels and cessation of pumping by the Contra Costa Mosquito a=
nd Vector Control District caused the marsh to remain flooded year-round. Th=
is situation promotes the growth of cattails and inhibits the growth of othe=
r plants. If the situation continued, the marsh would fill in with cattails,=
 a situation that would provide less open water and less forage for water fo=
wl. The overgrowth of cattails would also provide more pockets where mosquit=
o larva could develop and make control of the mosquito breeding areas much m=
ore difficult. With the spread of West-Nile virus approaching Contra Costa C=
ounty, draining the marsh provides a tool to control the development of mosq=
uito breeding pockets with out resort to more labor intensive biological and=
 pesticide methods.

  

#ffffff" SIZE=3D2 PTSIZE=3D10 FAMILY=3D"SERIF" FACE=3D"Times New Roman" LANG=
=3D"0">The  McNabney Marsh Management Advisory Committee will evaluate=20=
the effectiveness of the dredging, improvement of  drainage through the=
 railroad culvert and the tide gates, and assess  the whole marsh syste=
m. They will then refine the future water management and could include summe=
r draining of McNabney Marsh plain, but not as extensively as this summer.

  

#ffffff" SIZE=3D2 PTSIZE=3D10 FAMILY=3D"SERIF" FACE=3D"Times New Roman" LANG=
=3D"0">I will add your name to the email list for McNabney Marsh Management=20=
Advisory Committee meetings. These meetings are open for the public and we w=
ould welcome your input.

  

#ffffff" SIZE=3D2 PTSIZE=3D10 FAMILY=3D"SERIF" FACE=3D"Times New Roman" LANG=
=3D"0">Dick

  

#ffffff" SIZE=3D2 PTSIZE=3D10 FAMILY=3D"SERIF" FACE=3D"Times New Roman" LANG=
=3D"0">Mt. View Sanitary District

 Dick Bogaert

Wetlands Biologist/Analyst

#ffffff" SIZE=3D2 PTSIZE=3D10 FAMILY=3D"SERIF" FACE=3D"Times New Roman" LANG=
=3D"0"> 

#ffffff" SIZE=3D2 PTSIZE=3D10 FAMILY=3D"SERIF" FACE=3D"Times New Roman" LANG=
=3D"0">

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Subject: RE: McNabney Marsh draining
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Steve:

=20

The draining of McNabney Marsh is part of the management plan for
McNabney Marsh. The channels are now exposed and an accurate, to scale
aerial photograph has been taken of the marsh. The exposed channels will
next be surveyed for depth and width and a dredging plan will be
developed. The dredging of the channels (next summer) will allow faster
draining and flooding of the marsh and better water management of the
marsh. The drying will also inhibit spread of the cattails. This project
was made possible by a grant from California Fish and Game, Office of
Spill Prevention and Response.

=20

I expect to flood the marsh sometime in October.  This will provide the
resting area for the migrant ducks. The marsh will remain flooded until
about July of next year; the end of the nesting season will determine
when the marsh is drained again.

=20

The background for this project was established years ago. The McNabney
Marsh (then locally called Shell Marsh) drained during the summer months
and had a varied plant assemblage of salt grass, fathen, pickleweed,
brass buttons and few other minor species. Gradual subsidence of the
marsh bottom, increased flow from the MVSD treatment plant, gradual
silting in and obstruction of the channels and cessation of pumping by
the Contra Costa Mosquito and Vector Control District caused the marsh
to remain flooded year-round. This situation promotes the growth of
cattails and inhibits the growth of other plants. If the situation
continued, the marsh would fill in with cattails, a situation that would
provide less open water and less forage for water fowl. The overgrowth
of cattails would also provide more pockets where mosquito larva could
develop and make control of the mosquito breeding areas much more
difficult. With the spread of West-Nile virus approaching Contra Costa
County, draining the marsh provides a tool to control the development of
mosquito breeding pockets with out resort to more labor intensive
biological and pesticide methods.

=20

The  McNabney Marsh Management Advisory Committee will evaluate the
effectiveness of the dredging, improvement of  drainage through the
railroad culvert and the tide gates, and assess  the whole marsh system.
They will then refine the future water management and could include
summer draining of McNabney Marsh plain, but not as extensively as this
summer.

=20

I will add your name to the email list for McNabney Marsh Management
Advisory Committee meetings. These meetings are open for the public and
we would welcome your input.

=20

Dick

=20

Mt. View Sanitary District

Dick Bogaert
Wetlands Biologist/Analyst

=20

________________________________

From: Sgloverccc at aol.com [mailto:Sgloverccc at aol.com]=20
Sent: Thursday, August 05, 2004 9:58 PM
To: Dick Bogaert
Subject: McNabney Marsh

=20

Hi Dick,
A guy on the local birding listserve was asking why the marsh is now
bone dry. I was hoping that if you have a minute or two you could
briefly describe to the group what is going on. If you write something
short I will forward it to the group.
Hope you are doing well!
Steve


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=3D'font-size: 10.0pt;font-family:Arial;color:navy'>Steve:=

=3D'font-size: 10.0pt;font-family:Arial;color:navy'> =

=3D'font-size: 10.0pt;font-family:Arial;color:navy'>The draining of McNabney=
 Marsh is part of
the management plan for McNabney Marsh. The channels are now exposed and an
accurate, to scale aerial photograph has been taken of the marsh. The expose=
d
channels will next be surveyed for depth and width and a dredging plan will=20=
be
developed. The dredging of the channels (next summer) will allow faster
draining and flooding of the marsh and better water management of the marsh.
The drying will also inhibit spread of the cattails. This project was made
possible by a grant from California Fish and Game, Office of Spill Preventio=
n
and Response.


=3D'font-size: 10.0pt;font-family:Arial;color:navy'> =

=3D'font-size: 10.0pt;font-family:Arial;color:navy'>I expect to flood the ma=
rsh sometime in
October.  This will provide the resting area for the migrant ducks. The
marsh will remain flooded until about July of next year; the end of the nest=
ing
season will determine when the marsh is drained again.


=3D'font-size: 10.0pt;font-family:Arial;color:navy'> =

=3D'font-size: 10.0pt;font-family:Arial;color:navy'>The background for this=20=
project was
established years ago. The McNabney Marsh (then locally called Shell Marsh)
drained during the summer months and had a varied plant assemblage of salt
grass, fathen, pickleweed, brass buttons and few other minor species. Gradua=
l subsidence
of the marsh bottom, increased flow from the MVSD treatment plant, gradual
silting in and obstruction of the channels and cessation of pumping by the
Contra Costa Mosquito and Vector Control District caused the marsh to remain
flooded year-round. This situation promotes the growth of cattails and inhib=
its
the growth of other plants. If the situation continued, the marsh would fill=
 in
with cattails, a situation that would provide less open water and less forag=
e
for water fowl. The overgrowth of cattails would also provide more pockets
where mosquito larva could develop and make control of the mosquito breeding
areas much more difficult. With the spread of West-Nile virus approaching Contra Costa
 County, draining the
marsh provides a tool to control the development of mosquito breeding pocket=
s
with out resort to more labor intensive biological and pesticide methods.


=3D'font-size: 10.0pt;font-family:Arial;color:navy'> =

=3D'font-size: 10.0pt;font-family:Arial;color:navy'>The  McNabney Marsh=
 Management
Advisory Committee will evaluate the effectiveness of the dredging, improvem=
ent
of  drainage through the railroad culvert and the tide gates, and asses=
s  the
whole marsh system. They will then refine the future water management and co=
uld
include summer draining of McNabney Marsh plain, but not as extensively as t=
his
summer.


=3D'font-size: 10.0pt;font-family:Arial;color:navy'> =

=3D'font-size: 10.0pt;font-family:Arial;color:navy'>I will add your name to=20=
the email list for
McNabney Marsh Management Advisory Committee meetings. These meetings are op=
en
for the public and we would welcome your input.


=3D'font-size: 10.0pt;font-family:Arial;color:navy'> =

=3D'font-size: 10.0pt;font-family:Arial;color:navy'>Dick


=3D'font-size: 10.0pt;font-family:Arial;color:navy'> =

">Mt.
 View Sanitary Distri=
ct


=3D"Courier New">Dick Bogaert

Wetlands Biologist/Analyst


=3D'font-size: 10.0pt;font-family:Arial;color:navy'> =


=3D3 face=3D"Times New Roman">



e:10.0pt; font-family:Tahoma;font-weight:bold'>From:=20=
Sgloverccc at aol.com
[mailto:Sgloverccc at aol.com] 

04
9:58 PM

>



font-size: 12.0pt'> 


.0pt; font-family:Arial'>Hi Dick,

A guy on the local birding listserve was asking why the marsh is now bone dr=
y.
I was hoping that if you have a minute or two you could briefly describe to=20=
the
group what is going on. If you write something short I will forward it to th=
e
group.

Hope you are doing well!

Steve





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