1j. Specs for Utility Dept Telemetry System CITYOF
.• CHANHASSEN
690 COULTER DRIVE • P.O. BOX 147 • CHANHASSEN, MINNESOTA 55317
(612) 937-1900 • FAX (612) 937-5739
MEMORANDUM
TO: Don Ashworth, City Manager
FROM: Gary Warren, City Engineer
DATE: March 7 , 1990
SUBJ: Approve Specifications for Utility Department Telemetry
System; Authorize Advertising for Bids
Project No. 90-3
The City' s Utility Department currently is responsible for daily
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maintenance checks on 22 wastewater pumping stations and 3 (soon
' to be 5 ) wells. These stations and wells are visited every day
including weekends and holidays to see that they are functioning
properly and not causing backups into homes or polluting the
environment. Ironically, the challenge of keeping abreast of the
system checks is dramatically compounded during times of
inclement weather such as thunderstorms and ice storms/blizzards
when it is most important for the Utility staff to check all
' stations to maintain them in service.
In order to stretch our productivity in this area and more
' specifically respond to station outages, the City has entertained
the idea of requiring a supervisory control and data acquisition
(SCADA) system to remotely monitor the basic elements of
operation of our wells and lift stations. This will allow us to
specifically respond to stations needing assistance without
having to visit all those stations which are not having problems.
This system also will provide us with a historical record of
' operation for scheduling maintenance and evaluating system
upgrades.
This has been budgeted in the Sewer and Water Expansion funds for
the last few years and staff has finally been able to arrange for
the preparation of the specification. There are a number of
' residents in the Carver Beach and Colonial Grove areas who
historically have borne the brunt of power outages and the
nuisance of basement backups who have patiently looked forward to
the City improving its response time to system outages (see
letter from Don Ashworth attached) .
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CITY OF CHANHASSEN
SEWER & WATER AUTOMATIC MONITORING AND ALARM SYSTEM
TECHNICAL SPECIFICATION
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1 .0 GENERAL
' 1 .1 DESCRIPTION OF WORK
Furnish, install , and place into operation a remote
' sewer and water monitoring system. The system will
automatically interrogate remote telemetry units
dispersed throughout the City of Chanhassen via
' telephone. The central monitoring station will be
located in the Utility Superintendent's office at the
Public Works complex, 1591 Park Road , Chanhassen.
' Additionally, a second monitoring station will be
allowed access to system status data via telephone
line. The second access site will be located at
Chanhassen City Hall , 690 Coulter Drive. Modifications
' will be made as necessary to the existing Mitsubishi
programmable controllers to accomplish all tasks . In
addition, for reasons of spare parts uniformity, the
' new telemetry will match the existing Mojave SCADA
telemetry.
These specifications are not all inclusive. Where it
' is determined that additional equipment is required to
compile a complete and working system, this equipment,
in its entirety , will be provided by the successful
' supplier. This is to be provided without further
compensation .
' 1 . 2 QUALIFICATION OF BIDDERS
To insure a complete and totally integrated system, a
single systems supplier will have total system
' responsibility. This manufacturer will have a minimum
of 5 years experience in the design and construction of
process control systems for the wastewater/water
' treatment industry and shall provide a minimum of 5
references of communities/utilities having similar
systems in place and operating.
' Responsibilities will include all design, installation,
software, modifications, and coordination.
' 1 . 3 OR EQUAL
Where brand names or manufacturers are specified
' herein, an approved equal will be acceptable. The
burden is on the bidder to establish equivalency.
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2.0 SYSTEM DESCRIPTION
2.1 GENERAL
The system will have the ability to monitor and display
status of a minimum of 120 remote telemetry units
(RTU) . In addition, it will be capable of
bi-directional communications/control. The system will
have the ability to easily be converted to radio
communications without changing the remote telemetry
unit.
2.2 PUBLIC WORKS COMPLEX
Provide individual power circuit and conduit from the
building lighting panel to the Utility Superintendent's
office. Equip outlet with a L5-20 receptacle.
Location to be determined by the owner 's
representative.
Provide conduit as necessary to enable a dedicated
telephone circuit to be installed by others. Location '
to be determined by the owner 's representative.
Provide a computer desk complete with printer stand and
adequate space to hold the central monitoring computer.
A telephone dialer will be provided to call City
maintenance personnel upon determination of an alarm by
the central monitoring system. Install the dialer,
modem, and any other peripheral devices in a Nema 1
wall-mounted enclosure. Locate and mount the enclosure
as determined by the owner 's representative.
Provide a 1. 5KVA uninterruptable power source (UPS) for
backup power . Locate UPS in convenient proximity to
the computer .
The central monitoring station will consist of an IBM
compatible computer and printer. Include all necessary
software and configuration programming to display all
data as determined by the owner. The displays will be
in color and easily readable. The system will be set
up so as to minimize operator keystrokes. The software
will automatically boot-up to an operational status
upon application of power. 1
The system will continuously monitor its communications
to each remote to ensure that valid data is being
monitored. In the event that communications is lost to
any remote, that remote will indicate a communications
failure.
Include all necessary cables .
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2. 3 WATER DISTRIBUTION SYSTEM
A. East Service Area
The east service area will be monitored for alarm,
level , and well flow. Install a RTU at Well House
#2. Modify existing Mitsubishi PLC
software/hardware to accommodate the monitoring of
' the following values:
Reservoir Level
Common Alarm
Well #2 Flow
Well #3 Flow
Well #4 Flow
' Well #5 Flow - being constructed in 1990.
Well #6 Flow - being constructed in 1990.
' In addition, provide three ( 3) spare analog inputs.
The RTU will be mounted in the existing Well #2
control enclosure. Supplier to verify that
adequate space is available. Provide isolation as
' required so as to not affect the operation of the
current system.
111 B. West Service Area
The west service area will be monitored at the west
' booster station located on County Road 117 (Galpin
Boulevard) at Lake Lucy Road. Install a RTU to
monitor the following:
' Common Alarm
Tower Level
' In addition, provide seven ( 7) spare analog inputs.
The RTU will be mounted in the existing west
service area booster station control panel.
Contractor to verify that adequate space is
available.
The existing Mitsubishi PLC hardware/software will
' be modified to accomplish the transmission of the
signals . Provide isolation as required so as not
to affect the operation of the existing controls.
' 2 .4 WASTEWATER PUMPING (LIFT) STATIONS
Furnish complete, 22 lift station monitoring remote
' terminal units . Each RTU will be housed in a NEMA 4
insulated enclosure. All field terminations are to be
made on a separate internal terminal strip. Provide
' lightening protection on the 120V AC power and
telephone line circuits. The enclosure is to have
condensation/freeze protection. The RTU is to be
battery-backed for a minimum of 4 hours.
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The enclosure will be mounted on the rear of the
existing lift station enclosures or as determined by
the owner ' s representative. Additionally, provide a
high level float switch to independently detect high
level conditions. The float switch will be provided
with adequate cable length to prevent the need for
splices . Intrinsic safety protection is to be
provided. Mount the float and wire to the new RTU
panel. Provide all installation and conduit necessary
to route the float cable from the wet well to the new
RTU panel .
Mount and wire a 3-phase power monitor in each existing
lift station control panel. Provide fuses on all power
sense lines . Wire the power monitor contact to the
RTU. Modification of the existing lift station panels
will be accomplished to facilitate communication with
the RTU.
The RTU will transmit the following signals: ,
High Alarm
Common Alarm
Power Failure
The complete lift station RTU panel will be constructed
to Underwriters Laboratories (UL) standard 508.
Provide a UL label on the panel that certifies
compliance with UL 508 .
2.5 REMOTE MONITORING COMPUTER STATION
Hardware and software are to be provided to enable an
IBM compatible computer (remote computer) , located in
the City Engineer 's office at Chanhassen City Hall , to
communicate with the central monitoring station. The
remote computer will be provided by the City. The
remote computer will access the current data found in
the central monitoring station. This data will be
displayed in the same format as that of the central
monitoring station. The remote computer will dial up
the central computer to gain access to the data.
Provide any additional hardware that may be required to
enable this communication (modem, etc. ) .
3 .0 PRODUCTS
3.1 UNINTERRUPTABLE POWER SOURCE
Isolation: Complete isolation from line. Less than 2 '
PF of effective capacitance. Neutral bonded to ground.
Voltage Spikes: Attenuation of 2000:1 from line. '
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Noise Rejection: Common mode better than 120 DB.
Transverse mode greater than 60 DB.
Output Voltage Regulation: +/- 3% nominal.
' Communications: RS232 for remote monitoring.
Battery Backup: Full load - 23 minutes, half load - 57
' minutes .
The UPS will be Best Power model: MD1. 5KVA or equal.
' 3.2 CENTRAL COMPUTER - TO BE PROVIDED BY THE CITY
The central computer will be IBM compatible including
' the following features:
80386 Processor
' 1 MB Memory
1. 2 MB Floppy
40 MB Hard Disk
83087 Math Coprocessor
VGA Graphics with 14" Monitor and Card
MS DOS VER 3 . 31 or Higher
Wide Carriage Printer; Panasonic KX-P1592, or equal
' Internal Modem
Serial Port
Parallel Port
All necessary cables
3. 3 RTU
' The RTU will be a single-board computer based on a
68701 processor with operating system on ROM. Complete
with internal modem operating on a standard protocol .
' The board will have a heat sensitive conformal coating.
The coating will change colors upon the overheating of
a failed component. The coating will also protect the
' printed circuit board from environmental damage. The
RTU will be capable of operating in a dial-up or
multi-drop mode . Radio keying will be a standard
feature for the multi-drop mode. Additionally, the RTU
' will have the following features:
8 Analog Inputs 0-5V DC or 4-20 MA DC
' 8 Status Inputs
8 Relay Driver Outputs
6 Optional Pulse Accumulators
' 4-Hour Battery backup with Trickle Charger
The RTU will be as manufactured by Mojave SCADA Model
LMX-202 or equal.
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3. 4 SOFTWARE
A. Central Monitoring Station
The central monitoring station software will
consist of a standard off-the-shelf package capable
of all monitoring, alarm functions, and
communications with the remote terminal units.
The software will support VGA graphics. All RTU '
polling will be done by the software with no other
hardware front end except modems . The software
will be able to import drawings, as a standard
feature, that have been created using AUTOCAD by
AUTODESK.
The software will be able to support a minimum of
four communications ports each being able to have
its own driver for communications protocol . The
software will also support two parallel ports for
printer communication. The software will be
capable of displaying process graphics, as defined
by the user , for monitoring and control.
The software will support an additional monochrome
alarm summary display as an optional feature. '
Four levels of password security are to be provided
to prevent unauthorized manipulation of data.
Historical trending and real time trending will be
supported along with statistical analysis .
LOTUS 1-2-3 will be provided as a standard portion '
of the software.
The software will display all lift station data in
a format that is easily readable. All screens will
be submitted to the owner 's designated
representative for approval prior to
implementation. A maximum of 8 active display
screens will be provided.
The ability to interface with the remote monitoring
computer at the Chanhassen City Hall will be an
integral part of the software.
All software will be licensed in the name of the ,
City of Chanhassen. Provide backup copies of all
programs.
B. Remote Monitoring Station
Provide software for the remote monitoring
computer . This software will connect to the
central station computer via dial-up modem. This
software will diplay data in the same format as the '
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central station software. Provide all necessary
hardware and software to allow monitoring and
display of the same data as found in the central
computer .
' 3. 5 FLOAT SWITCH
The float switch will be PVC of a suspended design with
' adequate cable for a continuous home run. The float
will be as manufactured by Anchor Scientific Model
SXXNO or approved equal .
3.6 TELEPHONE DIALER
The telephone dialer will be completely programmed and
' placed into operation. Mount dialer in the auxiliary
NEMA 1 enclosure located next to the central monitoring
computer . The dialer will have the following features:
4-Channel Input
Battery Backup, 4-hour
NEMA 12 Enclosure
' Digitally recorded user-entered speech
The dialer will be Microtel MCS-250 or approved equal
' 3 .7 ENCLOSURE
The lift station enclosures will meet the following
requirements:
A. NEMA 4 , 14-gauge steel wall mounted.
B. Stainless steel continuous hinge pin.
' C. Padlocking hasp.
D. Paint to match the existing lift station enclosure
Color.
' E. Interior finish is to be white enamel. -
F. Size as required for equipment.
G. Internal devices will be mounted on a 14 gauge
steel subpanel.
' H. Wiring shall be neatly bundled and laced.
3.8 INTRINSIC SAFETY BARRIER
' Provide intrinsic safety barrier protection on float
switch. Barrier will be suitable for Class 1 Division
1 operation. Barrier will limit current and voltage on
' the hazardous side to a maximum of 100 micro amps at 9
volts D.C. The barrier will be listed by Underwriters
Laboratories. The barrier will be as manufactured by
' Transamerica Delaval , Gems Safe-Pak or approved equal.
3 . 9 TRANSIENT PROTECTION
Provide transient protection on the 120V single phase
power for each lift station panel. The unit will
protect all electrical devices from transients on the
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power line. Response time for transient clamping to
ground will be approximately 50 nanoseconds or less . I
Provide transient protection for each telephone line
connection point including the central station. The
transient protector will be a TII-355 or equal.
3 .10 WIRE AND CONDUIT
Conductors shall be soft annealed copper stranded.
Size according to NEC guidelines. No conductors
smaller than 18 AWG are to be used. Provide color
coding as follows:
Control wires, 12V - Red
Control wires, 120V neutral - White
Control wires, low voltage - Blue
Ground - Green
All wire shall terminate on barrier type terminal '
strips labeled to match the system drawings. All wires
will be labeled on each end with a self-adhesive,
easily readable , self-covering label. Provide panduit
type wire way within panels for a neat and orderly
appearance.
Conduit shall be galvanized steel , except underground
which shall be heavy wall PVC, 90 DEG. C, UL rated in
conformance with the NEC. Installation shall be in
accordance with Article 347 of the NEC. Grounding
conductors shall be provided where required.
3.11 COMPUTER DESK I
Provide a computer desk and printer stand for the
central monitoring computer. The desk will be Lit-Ning
Model E4-4201-PO. The printer stand will be Lit-Ning
E4-4207-PO or approved equal.
4 .0 SPARE PARTS
4 .1 Provide the following spare parts: ,
1 RTU board
1 condensation/heater unit
2 relays of each type used
10% or 10 , whichever is greater, each type fuse
1 spare float switch
1 box computer printer paper
5 ribbons for printer
1 power supply of each type used
1 intrinsic safety barrier I
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5 .0 STARTUP AND TRAINING
5. 1 Provide all startup services to ensure a complete and
operating system. Check each alarm condition at each
' remote to ensure all points operate and indicate at the
computer. The owner 's representative will witness all
individual alarm checks. Install and configure the
remote computer monitoring software located at the
' Chanhassen City Hall.
Conduct a minimum of 40 hours of on-site operator
' training on the operation and maintenance of the
system. Include instruction on the operation of all
software. The training time will be consumed at the
owner ' s discretion over a period of one year .
6 .0 GUARANTEE
6 .1 The supplier will guarantee all parts and labor for a
period of one year from date of system acceptance.
' Guarantee is to be all-inclusive except documented acts
of God. The supplier, in addition to normal warranty
return trips , will provide one return visit
approximately six months after acceptance for the
' purpose of providing any desired minor modification , or
additional refresher training, as determined by the
owner ' s representative.
7 .0 COORDINATION
' 7 .1 The supplier will provide all coordination required for
installation of the telephone circuits. This includes
all required meetings and direction to the telephone
' company. The City of Chanhassen will pay all telephone
company charges related to the installation. All
telephone company invoicing will be direct to the City.
1 7 .2 The supplier is to coordinate his activities to prevent
the shutdown of any station. In the event that a
station must be taken out of service, the contractor
' will coordinate 48 hours in advance with the owner 's
representative. The shutdown will be arranged in such
a manner as to minimize this time. The contractor will
assume responsibility for the continuance of station
functional operation while the station is out of
service.
8.0 INSTALLATION - GENERAL PROVISIONS
' 8 .1 The supplier shall be responsible for conforming to the
latest version of the National Electrical Code (NEC) .
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The supplier will be responsible for all permits as
required for electrical construction and pay all
electrical inspection charges.
The supplier will keep the premises clean and orderly
during installation of the equipment. Most locations
are in sensitive residential areas; all work will be
performed to limit the impact upon residents or their
property. Any sod or other such landscape details will
be placed back into the original condition.
No work will be done outside the hours of 8:00 a.m. to
5:00 p.m. Holidays and weekends will be at the
discretion of the owner.
9.0 DOCUMENTATION
9 .1 SUBMITTALS '
The supplier will provide six copies of complete
submittal data for approval by the City. The submittal
will consist of equipment cut sheets marked up to
indicate the actual equipment to be supplied. The
submittal will have an index and heading sheet for each
item. Complete shop drawings including point to point
wiring, panel layout, and dimensional information will
be provided. The City of Chanhassen may waive this
requirement where it considers this to be unnecessary . '
9 .2 OPERATION AND MAINTENANCE MANUALS
The supplier will provide at the completion of the '
project three complete bound copies of the operation
and maintenance manuals. The manuals will be of the
same format as the submittals except that the
information is to be of an installation and maintenance
style properly indexed for easy reference. Catalog cut
sheets will not be accepted. The manual will be bound
in a three-ring binder. Final drawings will be
provided encompassing all changes that were made in the
field. This will be considered as an installed
drawing.
10 .0 NOTICE TO PROCEED ,
The project is to be substantially complete within 240 days
of notice to proceed. Failure to complete the project
within the allotted time will constitute liquidated damages
in the amount of $50 .00 per day.
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Don Ashworth
March 7 , 1990
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' The attached specification, which was drafted by Bentec
Engineering who has worked with the City over the years in
upgrading and maintaining our utility system, provides a basic
' package for providing this remote monitoring system. Basically,
all 22 pump stations and wells, including the water storage
tanks, will be monitored by this system. The system will have
' expansion capacity to accommodate a minimum of 120 remote
telemetry units which should be sufficient for future lift
station and well additions as the City grows .
' Only basic parameters are intended to be monitored at this time
such as reservoir level, common alarm and well pumping rates for
the water system. The lift stations will be monitored for high
' water alarm, common alarm and power failure. A printed record
will be generated by the system for all alarm conditions and an
automatic telephone dialer is included for summoning utility
personnel during off hours when system failures and alarms are
experienced. I am confident the system will greatly enhance the
Utility Department' s ability to respond in a more timely,
efficient manner to system failures which to this point in time
I could only be identified by actually visiting the stations or by
receiving complaints and phone calls from residents/the police
department! This will allow us to operate in a more proactive
' mode which I believe will benefit not only the system efficiency
but help to avoid a majority of resident and environmental
problems in this regard.
The engineer ' s estimate for acquisition and installation of the
telemetry system is $110 ,000 . This is to be funded from the
Sewer and Water expansion funds, i.e. 401 and 402, which have
' been budgeted for in 1990. It is therefore recommended that the
attached specification for Sewer and Water Automatic Monitoring
and Alarm System be approved and authorization given for
' advertising for bids .
ktm
' Attachments: 1. Specification.
2 . Letter from Don Ashworth dated December 29 , 1989.
c: Jerry Boucher, Utility Superintendent
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_ 1 CHANHASSEN .
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690 COULTER DRIVE • P.O. BOX 147• CHANHASSEN, MINNESOTA 55317 1
(612) 937-1900 • FAX(612) 937-5739
December 29, 1989 II
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Mr. Elwood W. McCary
108 Sandy Hook Road I
Chanhassen, MN 55317
Re: Lift Station Modifications - Colonial Grove I
Dear Mr. McCary:
You have asked that I prepare a letter which potentially can be I
given to a prospective buyer assuring that individual that a
sewer backup, similar to that occurring to yourself, would not
occur in the future. First, let me state that there are no abso-
lutes. I do feel relatively comfortable in stating that�.the .
backup occurring at your property this past fall was a highly
unusual circumstance. I would not show this letter to the claims
adjuster as I truly believe that the backup could better be II
defined as an "act of God" rather than some form of liability
cause/created by the City. Reasons for this statement include:
IISewer flows - The Colonial Grove list station serves a
smaller population then many of our=-lift stations.
Accordingly, the sewer flows into that station and necessity
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for it to pump from the wet well occurs less often. In
layman's language, all of this means that a greater amount of
time exists between when a potential problem may originate
and when that would actually-Stu;ran;. .-nto)a problem for a prop-
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erty owner served by that ..lift station; and
Maintenance - All of the City' s lift stations are'
e ontinuously
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maintained. This m that pumps are pulled, relays
checked and floats;Jeans inspected on_..a , _ ontibuous basis. I would
anticipate that most cities`thave '�a relatively good main-
tenance program to insure that;.=preventative maintenance
occurs rather than waiting for a particular problem to occur.
What is unusual is that Chanhassen additionally provides
weekend service. Each lift station is manually checked on
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every Saturday and Sunday; and
Design characteristics - The Colonial Grove lift station is a
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dual pump station. As pumping demands occur, the station
automatically shifts from one pump to the other. Three
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Mr.. Elwood W. McCa 14
• December 29, 1989
Page 2
floats exist within the wet well to insure that failure does
not occur. If a pump is scheduled to operate next and, for
whatever reason, such does not occur, the station automati-
cally shifts the pumping assignment to the alternate pump.
The pumps are sized so as to allow pumpage to occur off of a
singular pump without creating the backup into the neigh-
borhood. Prolonged usage of singular pump would not be
' recommended, but such usage would not normally create harm to
the station assuming that it were caught within two to three
days; and
' Technology - As eluded to above, the technology offered in
lift station design continuously changes. Singular pump
stations have been replaced with the dual pump station as
exists in Colonial Grove. Additionally, the various float
systems, including a warning light (as exists in Colonial
Grove today) typically alerts the neighborhood and inspector
that one or both of the pumps are malfunctioning. Technology
has now moved one step further ahead. Systems currently
exist which can automatically monitor all of the major func-
tioning components of a wet well and lift station. These
monitoring devices can then alert a master control panel of a
malfunction 24 hours a day. This system is similar to a home
,burglary alarm system alerting an outside service of an
intrusion. The City has budgeted for installation of such a
system in 1990. This fall the City selected Bentec
Engineering to review our water and sewer pumping facilities
' (approximately 25 remote locations) and to make a recommen-
dation as to the type of telemetry system to be used. That
assignment was completed. It is anticipated that completion
of the plans and specifications will occur during January and
February allowing for a bid letting in the spring of 1990.
Work is anticipated to be completed by the summer of 1990.
As stated at the beginning of this letter, the backup that occurred
at your property is considered by an engineer/utility personnel to
be a highly unusual event. To have a situation where you have
' higher than normal flows, two relays simultaneously being knocked
out, a warning light not seen, an inspector not recognizing that
the first pump was malfunctioning all represent unusual occurren-
ces. The likelihood of these simultaneously occurring in the
' future is not likely. Upon completion of the approximate $100,000
telemetry system, I would say that the odds would move to an infi-
nitesimal range.
Should you have any questions in regards to this letter, please
feel free to contact either myself or the City Engineer, Gary
Warren.
Sinc erely,
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Don Ashworth
City Manager