D Proj 04-08/Water Treat Plant
CITY OF
CHANHASSEN
7700 Market Boulevard
PO Bo,147
Chanhassen. MNSS317
Administration
Phone9S2.227.11oo
Fax:9S2.227.111o
Building Inspections
Phone:9S2.227.118o
Fax9S2.227.119o
Engineering
Phone:9S2.227.116o
Fax9S2.227.117o
Finance
Phone:9S2.227.114o
Fax:9S2.227.111o
Park & Recreation
Phone:9S2.227.112o
Fax:9S2.227.111o
Recrea!ionCenter
2310 Coulter Boulevard
Pho" 9S2.227.14OO
Fax:9S2.227.1404
Planning &
Natural Resources
Phone9S2.227.113o
Fax:9S2.227.111o
PublicWorl<s
IS91 Park Road
Phone9S2.227.130o
Fax:9S2.227.131o
Senior Center
Pho,,:9S2.227.112S
Fax9S2.227.111o
WebSile
www.ci.challhassen.mn.us
1)
MEMORANDUM
TO:
Todd Gerhardt, City Manager
Paul Oehme, City Engineer/Dir. of Public Works~<;,1~ CJ.
f2 -
April 19, 2005
FROM:
DATE:
SUBJ:
Water Treatment Plant Update 90% - Project No. 04-08
BACKGROUND
At the January 10,2005 work session, Council was updated on the 30% Design Review.
At the February 28, 2005 work session, Council was updated on the 60% Design Review.
On April 25, 2005, Council will consider approval of the plat for the East Water
Treatment Plant (WTP).
In preparation for the present WTP design, the following recent studies have been
performed:
I. Pilot Report for the Removal of Iron, Manganese and Arsenic, May 17, 2004.
The pilot plant study confIrmed the effectiveness of the proposed treatment.
2. Distribution System Capacity Study, May 20, 2004. This computer model study
confIrmed the existing distribution system is adequate to handle the output from a
new 6,000 gallon per minute (gpm) WTP located at the Ready-Mix Site.
3. Lotus Lake Well Siting Study, May 20, 2004. This study confIrmed the glacial
drift and Prairie du Chien-Jordan aquifers could each provide one new 1,000 gpm
(max. rate) well at both the WTP Ready-Mix Site and the South Lotus Lake Park
Site.
4. Preliminary Investigation Report, Lotus Lake Water Treatment Plant, May 24,
2004. This report and subsequent review with the Minnesota Department of
Health confIrmed Ready-Mix Site A to be the most suitable for a new WTP.
DISCUSSION
The site is located between Highway 5 and the Twin Cities and Western Railroad and just
west of the intersection of Highway 5 (Arboretum Boulevard) and Chanhassen Road.
The WTP will have the following features:
. Water Treatment
I. In-line pressure aeration.
2. Chlorine and potassium permanganate addition.
3. Gravity [¡[tration using green sand and anthracite media.
4. Fluoride addition for prevention of tooth decay (state requirement).
5. Orthophosphate addition as a corrosion inhibitor.
The City of Chanhassen· A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails. and beauliful parks. A great place 10 live, work, and play
Todd Gerhardt
April 19,2005
Page 2
· The WTP below-grade components and the [¡[ter cells will be constructed with
cast-in-place reinforced concrete.
· A fInished water clearwell pumping chamber will be provided below the WTP
operating floor.
· The WTP above-grade components will be constructed with brick and block.
· The WTP roof will be a blend of sloped standing seam metal roofs and flat roofs
with parapet perimeter walls.
· A buried Filter Backwash Tank will be constructed adjacent to the WTP. It will
also be constructed of poured-in-place concrete and provide for the recycling of
90% of the water used in the [¡[ter backwash process.
· The WTP will include a control room, laboratory, meeting room, break room and
a unisex toilet, in addition to the basic treatment and pumping facilities.
· A standby power generator will be provided to enable the WTP to operate when
the local electric power grid is inoperative and provides power to Well No. 10.
· The WTP operation will be tied into the City's SCADA system and be designed
for automatic, unmanned operation.
· An emergency overflow system to prevent any damage due to equipment
malfunction or operator error. The local stormwater system must accommodate
this flow.
· A security system will include consideration of potential future homeland
defense security requirements. Staff has meet with security personal who have
worked on other security systems for other treatment plants. In general, the
security system staff is proposing will include:
1. Card readers that will provide entry into the plant by staff. Backup
entry will be provided by key locks.
2. Motion detectors with cameras will be placed in the pump rooms and
[¡Iter area.
3. Cameras will be placed along the perimeter of the building with motion
detectors.
4. The site will be lighted during the night.
5. Signs will be placed along the perimeter of the building notifying the
public that the building has a security system.
6. The Carver County Sheriffs offIce will be notifIed automatically if an
alarm is triggered.
A separate contract for the security system vendor will be quoted out after the main
construction contract has been awarded. The main construction contract will include
conduits for power and communication for the security system. The security vender will
then install the security system. This type of approach has been used successfully on
other projects. Staff feels this approach will give the City more control over the security
system installation and should not add to the cost of the project.
The second test well for Well No. 10 was drilled the week of April 4, 2005. The second
test well site is located at the southwest quadrant of TH 10 1 and 78"' Street. The well
G:\ENG\PUBLICD4-08 WI'P\9O% review\bqd 022805 work session 90% review.doc
Todd Gerhardt
April 19, 2005
Page 3
was then test pumped and the aquifer levels from Well Nos. 5 and 6 were taken during
the test pumping. The well appears to have a substantial glacier drift aquifer layer at this
location and the test pumping went well. The consultant is currently modeling the test
well results and the fIndings will be presented at the work session with a future well site
recommendation.
The consultant is working hard on the plans and will be providing the latest drawing at
the work session. The following items are submitted for the fInal design review or will
be available at the work session for review:
1. Site Plan.
2. Floor Plan.
3. Typical WTP Cross Section.
4. Architectural Elevation.
Costs for the treatment plant are currently being gathered and an estimated cost will be
presented at the work session.
SCHEDULE
The future schedule is as follows:
Approve Plans & SpecifIcations
Open Bids
Start Construction
Start Up of Treatment Plant
Alternate Start Up of Treatment Plant
May 23, 2005
June, 2005
July, 2005
August, 2006
December, 2006
Attachments
c: Jim Norton, SEH, Inc.
G:\ENG\PUBU0D4-08 WTP\9O% review\bki!d 022805 work session 90% review.doc
~-----'-,"","""""
"""'.....,.... """""'.- -,......."
,.,., ~ <:II,.
1IlOO... ,......,...\ "'-"",~t
~"_'_"LAT.._, ......,'"
.<
".
O~
if
I ~~ I
\ ~
,
\ \ 0
; \ r
, ~
\ ~
~
Z
o \ , , 0
. .
\ - -
. .
, " "
\ \ ~ ~
, \ ! ~
\ \ !
, !
\ \
\ !
,
\ /
!
~, -
¡Ô ".
.~ < "
~ ; ".~...
= ~ 111'11'
X~ i §; ,
. 080 \
zr:;:<
i: I
;~ \
,
m~\ ~"
I , M' \
~~~~
, '1;~b
O$H , .,,'
\ ~.
, j , ~¡
\
! _0
¡ ; 1 ~~
~ ~I
.
0EJ SEMFUIIO.-'DO 90% ~
.........-. etr1ØIlO. - EAST WATER .. -:"J:'I'..... '"
~ ë EROSION CCHTNJL PlAN IlSEDII'JI: __ REVIEW TREATNENT PLANT ~:..=.~_..... ~ 1----
_. D ~ .,........,,,
_. D DRAWING FOR THE ct1Y Of SEH :::::'::,x
_....._.....1""1 - - - CHANHASSEN, MINNESOTA ------... .
._---,.... ~
I
~~g .~ ~~ :~s I
o.~ ~~ .¡¡ .¡¡¡¡¡ I.
o,~ 0 o~ ~"
hi~~ã;8 I'
"'¡d 0( CI J
:a~ ~~ ~ ~~ .
:III: ~j! :I(""!Ii: I
~~~ ~~ ~ ~Z .
;¡~ h ~ ~ ,I'
0.' ~ ,
. ~~I ~~ ;: I
I ; ~ ~,". 0 ~ '
I ~ I . , I.
. ~~ ~ .
I . ~ ~I. 0 " ~. I
li~~~ "
I',"" /
1 ~; ~.. I ;
p'l I I I
I H~ I ' I
~ ~\ I I I
\ I~I I
\.: \ /~ i'>¡/ø/
, \'1 \ II 'Y I '>rll
1,1 \ I
'I 0 \ I. I
I '! \ I '
'I \1 q< \ I 11;/
~~ I y
, ~ \1 ~~ \/,' /
<: '\' s~ I I I
,~ I '~I
1::j.. / I I
'Vj 11,\ .''/ Y//, I
'.~ 'l\ \i/1,,(~l'/
, ""~ . \ .01 ~r ~(
,ip, \ /;." . ~, i
.~ Vr'~ / \ ~,'
¡¡ · ',)(j .I'I·. \
\". ~ ". .",1 '~ .
h· ; I '. ,~i/i,~\ \; I 10 ~
~ i!'-ii ~/¡i\'~ , I i
t!~!1 ,A/~)":>\\~.! ¡ !!
,. I /io' · j\f \."~~¿ II
l;(i,' .. (Ä. \'i:,' \i }>~~
h : I \; '; '; i 'ì ~.~,...~ ¡ ~
'Y '~;-i~~-,",90 I:: I \ !!~ I ~~
ill_,'''' I' ~ I ¡:
,¡ ~
~ -
, .
~
, -
?~ 7'~
~~ "1.CSJ
." "
:::..._ .J:.-.>,."..o! ~'"
','" \\ mt!;~~·
,-¡ !"
".\ §",
.
~
r'\
'0
'i
~.g
"~a "
g ,
,12 ~
~, :
~~ ~
-1\ h,
i \ Z ¡:;J,
.~ ,
-" I
ê ,
~ I
3 '
i;
r'~
~ .~~ ~
1·0-... ~ ~
~;Sb.l.~Iªi:! ~
~~~,¡~~...B/ ,~
~¥'I I"
I I
h.
~H ¡¡ '\
!Ií S! 8 ;sJ
~iH \
f. ,
Z § \
~ \.
~ '"
........;$i ".~.' I
----1'~----i{t
. '\ f't \
. ",'.' x"
q -, ~\ \
~ ' " "
~ \ '\'"
H'
\ '
! \ ¡:
~ \ ~,
\
\'
\
\
\
\
I '
$
¡ ,
0EJ~~ -- :;;::~::.:
SfT£UT1UTY..-...... llliUEoo.Tt: XI!
(j) IlallNDS'I' JO[
! -~
n ____~~
''''' e___
90%
REVI EW
DRAWING
-....--
[~'~ -~'~~=I ~J 1_---
¡;,¡¡¡¡;;.-..-=",... :.,":;:.'="=! h "_.....,,,,
~- ~;::"i,:.".;;.':'::'"
- SEH ~-
-~_..-=----
EAST WATER
TREATNENT PLANT
FOR THE erN OF
CHANHASSEN. MINNESOTA
!
\'i""'", ."-,
\\(">j;
, \ I ~
'. II
~ :
\"
\
\
\
\
'\ 0-\.
þ,
\ :-\
, !1"\~.",:",..
\ ....:"
,'.j
::1,1 i,
h·'
r¡ê ~ "
8 ~ ib:.
."~ r:;;·
!"\ c<.
ª
I ~ I
I ã I
I ~ ~ l
I i ~ I
I " ~i
I ; ~~I
I ~ ,"I
I ~ J.I
I ~;X \
\ .
~d
.~\
'" \ g
~h~
ì~ '"
~
~ /
\ /
V
/
/
I \1
~ '"
---..... § \~
--.....l.\~
, ~'"
\ ~ \\
'\ ! I
. .
'~
h
~ \ . ,
~ '
! \
ª \
\
I .~
, ,~
I.~
'~~
la"
, .
\ ~
'~
\ c
'I ¡'
/.
i
I'
"''\.
~
C
$
,
Z
g<,
~ ""i
¡ ..
\
1j,¡v¡H 311/15
T.H. 101
is
~
"
101
0EJ _~~_œ 90% EAST WA.TER [~~_-e"~~1
SlTEI.A'I'OUTPI..NI art_NO. - ;::o;r:---- ~ 1----
" å _oo.1t __ REVIEW TREAl'NENT PLANT ..-.....'"
() DQIND 1ft' :oc DRAWING FOR THE crTY OF ~ ~,~~
(". _... xx SEH ==-
____"..e_ - - ~ CHANHASSEN, MINNESOTA ------ ...-
.----... -
':m
.~
1ì
'.!if
¡~
~
z
~
~
ø
~
o
'0 is
'ì
.I
~
.,~
"¡
6
.z
,
¡ "
~ ~I
~ "
II¡i"
I" ,
" ,
::¡:
" ,
"
"
"
"
,,-
µ--
"
"
wE] S(Hru:NO.......~OO 90% EAST WATER ~
an'.DNO. - -..-'.........".
---...- j¿ 1----
-~. -,- REVIEW TR£ATMENT PLANT . ".............
~. ~ ~,':".;;..'":':""
-. I2r'AW!!:!Q,. FUR THE CITY OF SEH =-
___.....(100) - CHANHASSEN, MINNESOTA _.IIlaúL..-.__
-----"" -
,.____OI-c.oD<>~~...._"...".......
...........".... ,..._.. _....IOUBO
-,.~-......~--_.....-_~--
SJ>.)
I
I
,'-------,
, ,
, ,
I'~: :
!!¡' ,
-. 1 _____L,-_
..~ fl--------------rur
~ II ' I
~ :: ¡
;.fi :: :
" ~
" ,
" ,
" ,
" ~
" '
" '
" '
" ~
" ,
" ,
:1 I
I l~____.l_______,.J
II I
II I I
I: : I
I I ¡ ~:I!
: : 1!~:
, "I'"
: II
, ,
, ,
, ,
: : I
r-----I-~-,
- -'
'OUHI>OTJ( I vD<EEII I
.vr
(: '
I,' ,
" ,
I c-"
I:
,
,
,
,
: :r--
: if--
U-ìl
~-T
,h
" ,
" '
" '
" '
~
......-..--.........
¡-
,
~
I:~
.~
1;
,'f
'è-
"
"
"
"
"
"
"
"
"
"
"
"
"
"
"
fr
"
"
"
"
"
"
:: I
" ,
::¡I I
::1:
" '
" '
" '
" '
K-c
:f--
"
"
"
"
"
"
"
"
"
"
"
:t==~~==
"
"
"
"
"
"
"
"
"
"
"
~~~
"
"
"
"
"
"
): I
[ [====±
1: I
" '
" '
" '
" '
" '
)' '
r i :,
" '
), '
:: :...
" '
"
"
)'
, '
, '
, '
"
"
"
"
"
"
"
I: I
lJ======C=
!
!
II
!
I
rn~ IEHÆ.l:NO.A-aWHIIIOZ.oo 90% EAST WATER ~
=~~ - ~:..:;.~~ j¿ 1----
> å . -- _.~ REVIEW TREATWENT PLANT , ".........".
~~ - :-.A:=:,:.",:",~
-~ - DRAWING FOR THE CnY OF SEH =-
-.J ___......(1Ðt -, - - CHANHASSEN. MINNESOTA
.--.....-.... ~ -~---