HomeMy WebLinkAbout92-0909 Otter Creek Pump Station (2) 9a- 09cel
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RESOLUTION
AUTHORIZING EXECUTION OF AN ENGINEERING AGREEMENT WITH
BAXTER & WOODMAN, INC. FOR THE PREPARATION
OF A PRELIMINARY DESIGN REPORT
BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF ELGIN,
ILLINOIS, that Larry L. Rice, City Manager, and Dolonna Mecum,
City Clerk, be and are hereby authorized and directed to
execute an agreement on behalf of the City of Elgin with
Baxter & Woodman, Inc. for the preparation of a Preliminary
Design Report for the Otter Creek Pumping Station/Force Main,
a copy of which is attached hereto and made a part hereof by
reference.
s/ George VanDeVoorde
George VanDeVoorde, Mayor
Presented: September 9, 1992
Adopted: September 9, 1992
Vote: Yeas 7 Nays 0
Recorded:
Attest:
s/ Dolonna Mecum
Dolonna Mecum, City Clerk
AGREEMENT
HIS AGREEMENT, made and entered into this //A- day
of 0 .�%, �� , 1992, by and between the CITY OF ELGIN, an Illinois
munici:al corporation (hereinafter referred to as "CITY" ) , and Baxter
& Woodman, Inc. , an Illinois Business Corporation ( hereinafter refer-
red to as "ENGINEER" ) .
WHEREAS, the CITY desires to engage the ENGINEER to furnish
certain professional services in connection with the preparation of a
Preliminary Design Report for the Otter Creek Pumping Station/Force
Main (hereinafter referred to as the "PROJECT" ) .
AND
WHEREAS, the ENGINEER represents that he is in compliance with
Illinois Statutes relating to professional registration of individ-
uals and has the necessary expertise and experience to furnish such
services upon the terms and conditions set forth herein below.
NOW, THEREFORE, it is hereby agreed by and between the CITY and
the ENGINEER that the CITY does hereby retain the ENGINEER to act for
and represent it in all engineering matters involved in the PROJECT,
subject to the following terms and conditions and stipulations, to
wit:
I . SCOPE OF SERVICES
A. All work hereunder shall be performed under the
direction of the Director of Public Works of the
CITY, herein after referred to as the "DIRECTOR" .
B. The Professional Services for the PROJECT shall
include:
1 . Preparation of a Sanitary Sewer Study of the
service area of the Otter Creek Pumping Station.
2 . Preparation of a two phase Preliminary Design
Report for the Otter Creek Pumping Station and
Force Main.
C . The Proposal Letter to the DIRECTOR dated June 15,
1992 is attached hereto as Attachment A to describe
the Scope of Services . The CITY decided to authorize
preparation of the Sanitary Sewer Study and Prelimi-
nary Design Report for the Otter Creek Pumping
Station, but not to authorize preparation of the
Final Design Documents for Phases I and II of the
Tyler Creek Interceptor Sewer . Therefore, the
provisions of this Agreement supersede the Proposal
Letter .
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II . PROGRESS REPORT
A. A Project Milestone Schedule is provided as follows,
based on the assumption that the CITY will issue the
Notice to Proceed to the ENGINEER or or before
September 11, 1992 .
1. ENGINEER completes Sanitary
Sewer Study Report and delivers
to CITY. October 16, 1992
2 . CITY approves Sanitary Sewer
Study Report . October 23, 1992
3 . ENGINEER completes Otter Creek
Pumping Station Design Concept
Report and delivers to CITY. December 4 , 1992
4 . CITY approves Design Concept
Report . December 11, 1992
5 . ENGINEER completes Otter Creek
Pumping Station Preliminary
Design Report and delivers to
CITY. February 19, 1993
6 . CITY approves Preliminary
Design Report . March 5, 1993
B. A Project Schedule is included as Attachment B,
attached hereto. Progress will be recorded on the
Project Schedule and submitted monthly as a component
of the Status Report described in C. below.
C. The Engineer will submit to the DIRECTOR monthly a
Status Report keyed to the Project Schedule . A brief
narrative will be provided identifying progress,
findings, and outstanding issues.
III . WORK PROJECTS
All work products prepared by the ENGINEER pursuant
hereto including , but not limited to, reports, designs,
calculations, work drawings, studies, photographs, models
and recommendations shall be the property of the CITY and
shall be delivered to the CITY upon request of the DIREC-
TOR provided, however, that the ENGINEER may retain
copies of such work products for its records. Such work
products are not intended or represented to be suitable
for reuse by the CITY on any extension to the PROJECT or
on any other project , and such reuse shall be at the sole
risk of the CITY without liability or legal exposure to
the ENGINEER.
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IV. PAYMENTS TO THE ENGINEER
A. For services under this Agreement, the CITY shall pay
the ENGINEER a lump sum of Sixty Thousand Dollars
($60, 000 ) , regardless of actual costs incurred by the
ENGINEER unless substantial modifications to the
PROJECT are authorized in writing by the DIRECTOR.
B. The CITY shall make periodic payments to the ENGINEER
based upon actual progress within 30 days after
receipt and approval of invoice . Said periodic pay-
ments to the ENGINEER shall not exceed the amounts
shown in the following schedule, and full payments
for each task shall not be made until the task is
completed and accepted by the DIRECTOR.
Sanitary Sewer Study Report $12, 500
Otter Creek Pumping Station -
Design Concept Report 18, 000
Otter Creek Pumping Station -
Preliminary Design Report 29, 500
Total $60, 000
V. INVOICES
A. The ENGINEER shall submit invoices in a format
approved by the CITY. Progress Status Report (IIC
above) will be included with all payment requests.
B. The ENGINEER shall maintain records showing actual
time devoted and cost incurred. The ENGINEER shall
permit the authorized representative of the CITY to
inspect and audit all data and records of the ENGI-
NEER for work done under this Agreement. The ENGI-
NEER shall make these records available at reasonable
times during the Agreement period, and for a year
after termination of this Agreement.
IV. TERMINATION OF AGREEMENT
Notwithstanding any other provision hereof, the CITY may
terminate this Agreement at any time upon fifteen (15 )
days prior written notice to the ENGINEER. In the event
that this Agreement is so terminated, the ENGINEER shall
be paid for services actually performed and reimbursable
expenses actually incurred prior to termination, except
that reimbursement shall not exceed the task amounts set
forth under Paragraph IV above .
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VII . NOTICE OF CLAIM
If the ENGINEER wishes to make a claim for additional
compensation as a result of action taken by the CITY, the
ENGINEER shall give written notice of his claim within 15
days after occurrence of such action. No claim for addi-
tional compensation shall be valid unless so made . Any
changes in the ENGINEER' s fee shall be valid only to the
extent that such changes are included in writing signed
by the CITY and the ENGINEER. Regardless of the decision
of the DIRECTOR relative to a claim submitted by the
ENGINEER, all work required under this Agreement as
determined by the DIRECTOR shall proceed without inter-
ruption.
IX. BREACH OF CONTRACT
If either party violates or breaches any term of this
Agreement, such violation or breach shall be deemed to
constitute a default, and the other party has the right
to seek such administrative, contractual or legal reme-
dies as may be suitable to the violation of breach; and,
in addition, if either party, by reason of any default,
fails within fifteen ( 15 ) days after notice thereof by
the other party to comply with the conditions of the
Agreement, the other party may terminate this Agreement.
X . INDEMNIFICATION
The ENGINEER shall indemnify and save harmless the CITY,
its officers and employees from and against any and all
loss, liability and damages of whatever nature, including
Workmen' s Compensation claims, in any way resulting from
or arising out of negligent actions or omissions of the
ENGINEER in connection herewith, including negligent
actions or omissions of employees or agents of the ENGI-
NEER arising out of the performance of professional
services.
XI . NO PERSONAL LIABILITY
No official, director, officer, agent, or employee of
either party shall be charged personally or held
contractually liable under any term or provision of this
Agreement or because of their execution, approval or
attempted execution of this Agreement.
XII . INSURANCE
A. Comprehensive Liability. The ENGINEER shall pro-
vide, pay for and maintain in effect , during the term
of this Agreement, a policy of comprehensive general
liability insurance with limits of at least
$1, 000, 000 aggregate for bodily injury and $1, 000,000
aggregate for property damage.
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The ENGINEER shall deliver to the DIRECTOR a Certifi-
cate of Insurance naming the CITY as additional
insured. The policy shall not be modified or termi-
nated without thirty (30 ) days prior written notice
to the DIRECTOR.
The Certificate of Insurance which shall include Con-
tractual obligation assumed by the ENGINEER under
Article IX intitled "Indemnification" shall be
provided.
B. Comprehensive Automobile Liability. Comprehensive
Automobile Liability Insurance covering all owned,
non-owned, and hired motor vehicles with limits of no
less than $500,000 per occurrence for damage to
property.
C. Combined Single Limit Policy. The requirements for
insurance coverage for the general liability and auto
exposures may be met with a combined single limit of
$1,000,000 per occurrence subject to a $1, 000,000
aggregate.
D. Professional Liability. The ENGINEER shall carry
Engineer ' s Professional Liability Insurance covering
claims resulting from alleged errors, omissions, or
negligent acts with a combined single limit of not
less than $1,000, 000 per occurrence. A Certificate
of Insurance shall be submitted to the DIRECTOR as
evidence of insurance protection. The policy shall
not be modified or terminated without thirty (30 )
days prior written notice to the DIRECTOR.
XIII . CONSTRUCTION MEANS, METHODS, TECHNIQUES, SEQUENCES,
PROCEDURES, AND SAFETY
The ENGINEER shall not have control over, or charge of,
or be responsible for construction means, methods, tech-
niques, sequences or procedures, or for safety precau-
tions and programs in connection with the construction,
unless specifically identified in the Scope of Services.
XIV. NONDISCRIMINATION
In all hiring or employment made possible or resulting
from this Agreement, there shall be no discrimination
against any employee or applicant for employment because
of sex, age, race, color , creed, national origin, martial
status, or the presence of any sensory, mental or physi-
cal handicap, unless based upon a bona fide occupational
qualification, and this requirement shall apply to, but
not be limited to, . the following: employment advertis-
ing, layoff or termination, rates of pay or other forms
of compensation and selection for training, including
apprenticeship.
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No person shall be denied or subjected to discrimination
in receipt of the benefit of any services or activities
made possible by or resulting from this Agreement on the
grounds of sex, race, color , creed, national origin, age
except minimum age and retirement provisions, martial
status or the presence of any sensory, mental or physical
handicap. Any violation of this provision shall be
considered a violation of a material provision of this
Agreement and shall be grounds for cancellation, termina-
tion or suspension, in whole or in part , of the Agreement
by the CITY.
XV. ASSIGNMENT AND SUCCESSORS
This Agreement and each and every portion thereof shall
be binding upon the successors and the assigns of the
parties hereto; provided, however, that no assignment
shall be made without the prior written consent of the
CITY.
XVI . DELEGATIONS AND SUBCONTRACTORS
Any assignment, delegation or subcontracting shall be
subject to all the terms, conditions, and other provi-
sions of this Agreement and the ENGINEER shall remain
liable to the CITY with respect to each and every item
condition and other provision hereof to the same extent
that the ENGINEER would have been obligated if it had
done the work itself and no assignment, delegation, or
subcontract has been made.
XVII . NO CO-PARTNERSHIP OR AGENCY
It is understood and agreed that nothing herein contained
is intended or shall be construed, in any respect, to
create or establish the relationship of co-partners
between the CITY and the ENGINEER, or as constituting the
ENGINEER as the general representative or general agent
of the CITY for any purpose whatsoever .
XVIII . SEVERABILITY
The parties intend and agreed that, if any paragraph,
sub-paragraph, phrase , clause or other provision of this
Agreement, or any portion thereof, shall be held to be
void or otherwise unenforceable, all other portions of
this Agreement shall remain in full force and effect.
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XIX. HEADINGS
The headings of the several paragraphs of this Agreement
are inserted only as a matter of convenience and for
reference and in no way are they intended to define,
limit or describe the scope of intent of any provision of
this Agreement, nor shall they be construed to affect in
any manner the terms and provisions hereof or the inter-
pretation or construction thereof.
XX. MODIFICATION OR AMENDMENT
This Agreement and its attachments constitutes the entire
Agreement of the parties on the subject matter hereof and
may not be changed, modified, discharged or extended
except by written amendment duly executed by the par-
ties. Each party agrees that no representations or
warranties shall be binding upon the other party unless
expressed in writing herein or in a duly executed amend-
ment hereof, or change order as herein provided.
XXI . APPLICABLE LAW
This Agreement shall be deemed to have been made, and
shall be construed, in accordance with the laws of the
State of Illinois.
XXII . NEWS RELEASES
The ENGINEER may not issue any news releases without
prior approval from the DIRECTOR, nor will the ENGINEER
make public proposals developed under this Agreement
without prior written approval from the DIRECTOR prior to
said documentation becoming matters of public record.
XXIII . COOPERATION WITH OTHER CONSULTANTS
The ENGINEER shall cooperate with any other consultants
in the CITY' s employ or any work associated with the
PROJECT.
XXIV. NOTICES
All notices, reports and documents required under this
Agreement shall be in writing and shall be mailed by
First Class Mail, postage prepaid, addressed as follows:
A. As to CITY:
JAMES L. RRISTIANSEN
Director of Public Works
City of Elgin
150 Dexter Court
Elgin, Illinois 60120-5555
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B. As to ENGINEER:
DARREL R. GAVLE
Baxter & Woodman, Inc.
8678 Ridgefield Road
Crystal Lake, Illinois 60012-2707
XXV. INTERFERENCE WITH PUBLIC CONTRACTING: P.A. 85-1295
The ENGINEER certifies hereby that it is not barred from
bidding on this contract as a result of violations of
either Section 33E-3 or Section 33E-4 of the Illinois
Criminal Code .
XVI . WRITTEN COMMUNICATIONS
All recommendations and other communications by the
ENGINEER to the DIRECTOR and to other participants which
may affect cost or time of completion, shall be made or
confirmed in writing. The DIRECTOR may also require
other recommendations and communications by the ENGINEER
be made or confirmed in writing.
IN WITNESS WHEREOF, the undersigned have placed their hands and
seals upon and executed this Agreement in triplicate as though each
copy hereof was an original and that there are no other oral agree-
ments that have not been reduced to writing in this statement .
For the CITY:
ATTEST: THE CITY OF ELGIN, ILLINOIS
By /l.�c .� By r
City ler ' ty Manager
(SEAL)
For the ENGINEER
Dated this ry/dday of / 1 Jr , A.D. , 1992 .
ATTEST: BAXTER & WOODMAN, INC.
BY 4&y X41.: By
Secretary Chairman/CEO
(SEAL)
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0650C
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Agenda Item No .
\gp _
ss19'�
August 4, 1992
MEMORANDUM
TO: Mayor and Members of the City Council
FROM: Larry L. Rice, City Manager
SUBJECT: Otter Creek Force Main/Lift Station (BRIS II)SS-04
PURPOSE: This memorandum will provide the Mayor and Council
with information to consider entering into an agreement for
engineering services for the subject project.
BACKGROUND: The initial extension of the Bowes Road Interceptor
Sewer from east of McLean to Randall Road was recently
completed. This sewer system will serve generally the area west
of McLean (map attached) . The next extension of this sewer
system is the Otter Creek Lift Station and Force Main. The lift
station would be constructed west of Randall Road adjacent to
Otter Creek at about Hopps Road. The force main would be
designed and constructed so as to connect the lift station with
the Bowes Road Interceptor in order to serve the area to the
north (Target, et al. ) and subdivision development west of
Randall . .
We sent requests for proposals to three engineering firms;
Baxter & Woodman, Greeley & Hansen and Strand Associates, for an
engineering study for the Otter Creek Pump Station and Force
Main and provide the City with an engineering design report with
probable costs for a wastewater pumping system to meet the
current needs and expandable to meet the requirements of the
future. The study, design report and probable costs will be
completed by February, 1993 . Upon acceptance of the design
concept by the City, the City will negotiate an amendment to the
agreement for the preparation in 1993 of the final plans and
specifications for the construction of the wastewater pumping
system. Although construction moneys have been programed for
this project for fiscal year 1993 construction might not start
until 1994 .
Each consultant' s proposal was evaluated with regard to the
consultant's stated qualifications, scope of work, staffing or
loading, schedule, familiarity with the site or the work, past
record, and technical approach. With due consideration to this
evaluation of the proposals, a tentative selection was made by
ranking the proposals considering the consultant's understanding
Mayor and Members of
the City Council
August 4, 1992
Page 2
of and familiarity with the work, staff qualifications,
schedule, loading, office location and other relevant factors.
Although all three firms were deemed qualified to perform the
work, the firm of Baxter and Woodman was selected as having
submitted the most complete and extensive scope of work.
After the selection was made, the proposed fees were examined to
determine if they were reasonable and comparable to the scope of
work. A negotiation of the fee was concluded with Baxter and
Woodman which includes a preliminary design of the facility.
FINANCIAL IMPACT: The fee to complete the study, design concept
and preliminary design reports is $60,000 which will come from
the Sewer Development (440-997-9901) portion of the Budget,
where $90,000 have been budgeted for this engineering design
report.
RECOMMENDATION:
It is recommended that the City Council authorize the City
Manager and City Clerk to execute the Agreement for engineering
services with Baxter & Woodman, Inc. in the amount of $60,000.
A copy of the Agreement is attached for your consideration.
r
Lar -L. Rice, ity Manager
do
Attachment
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---1-_-?
OTTER CREEK LIFT STATION
AND
FORCE MAIN
Consultant Selection Results
A. Evaluators :
1. James L. Kristiansen
2 . Melford Dahl
3 . Steven Pertzborn
B. Ratings :
1. Baxter and Woodman.
2 . Greely and Hansen.
3 . Strand.
The Above rating were based upon the evaluations of
the following:
. Completeness of scope of service.
. Schedule.
. Personnel qualifications .
. Experience with similar projects .
. Manhour histogramme.
Note: All firms appeared qualified to perform the
work; Strand was rated lower based upon a reduced scope
compared to Baxter and Woodman, and Greely and Hansen.
C. Fee Proposals
Phase City Strand Baxter- Greely-
Description Estimate Woodman Hansen
1 . Sanitary Sewer $15,000 $21, 152 $12,824 $15,282
Study
2 . Pump Station $20,000 $13,429 $18,048 $37 ,721
Design Concepts
3. Design Report $30, 000 $11,895 $29, 356 $35,497
TOTAL $65,000 $46,476 $60,228 $88,500
Note: Greely and Hansen did not provide a fee schedule based
upon work phases, but rather by individual work tasks. Work
tasks were combined into work phases in order to provide the
fee comparison shown above.
JLK:pn
MDM0016/TEXT071/MISCENGM.DM
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June 15, 1992
bnvftonmental engin
Mr. James L. Kristiansen, P.E.
Public Works Director
City of Elgin
150 Dexter Court
Elgin, Illinois 60120-5555
Dear Jim:
The future site of the Otter Creek Pumping Station is shown in the photograph on
the cover of this Proposal. However,before the pumping station is built,careful planning
must be completed. Some key items that must be determined are:
• How much pumping capacity is needed?
• How large and deep should the wet well be?
• What type of pumps should be used?
• What type of emergency power source should be used?
• What type of electrical controls and SCADA system is best?
• How should the pumping station and piping layout be arranged?
• What type of architectural style should be given to the building?
• What force main system should be used to transport the flow from the pumping
station to the Bowes Road Interceptor Sewer?
We believe the capacity of the pumping station is the most important issue
because it impacts all other items described above.
S _ We have briefly reviewed the "Interceptor Sewer Master Plan Amendment and
Northwest Interceptor Route Study"prepared in 1990. Table I-1 in that report lists the
amounts of flow expected from various subbasins in the service area. The far westerly
portion of the service area was divided into three subareas, Route 47 North, Route 47
8678 RIDGEFIELD ROAD/CRYSTAL LAKE, IL 60012/815/459-1260
Mr. James L. Kristiansen June 15, 1992
City of Elgin Page Two
Central, and Route 47 South. The total area encompassed by three subareas is almost
16,500 acres. The ultimate population in these subareas is 84,800 people, and, the
average daily dry weather flow after ultimate development of the area will be about 8.5
million gallons per day (mgd). This is a reasonable flow rate based on an estimated
sewage amount of 100 gallons per day per person. However, the allowance for
infiltration/inflow (I/I) during wet weather periods is 9.3 mgd or an additional 110
gallons per person per day. We believe that this is an excessive I/I allowance for an area
that will be developed in the future.
In our experience, the amounts of I/I contributed in new developments is
substantially less than the historical averages from existing developments. This is due
to the fact that new sanitary sewers are built with better materials. Furthermore,current
building codes and practices prohibit direct connection of sump pumps,footing drains,
and roof downspouts. Consequently, I/I amounts from new developments is generally
•
very low.
One of the most important tasks for planning for the Otter Creek Pumping Station
is a critical review of the predicted flow rates that will become tributary to the station as
development in the service area continues. In fact, the cornerstone of our plan for the
Otter Creek Pumping Station(Part 1)and the Tyler Creek Interceptor Sewer design(Part
2) is a Sanitary Sewer Study to reevaluate the predicted peak flow rates from the entire
western service area and to determine the sewer sizes, depths, and slopes necessary to
convey the wastewater from the future residents to the Otter Creek Pumping Station and
Tyler Creek Interceptor Sewer.
I
Mr. James L. Kristiansen June 15, 1992
City of Elgin Page Three
r
Sanitary Sewer Study
This study will include the following steps:
1. Review projected total population to be included in the service area and
subareas with the City Planning Department.
2. Reassess I/I allowances for the various subbasins in light of the existing
developments and proposed future land uses. We will consult with the City's
Engineering and Public Works Staff to assure concurrence of allowances
used.
3. Review topographical information from the subareas and the trunk sewer
layout proposed by the 1990 Report. We plan to start at the far westerly
portions of the service area and determine the sewer sizes, slopes, and depths
of the lateral sewers necessary to convey sewage from the individual resi-
dences to the trunk sewer. Once the start of the trunk sewer is reached,we will
use our own specially developed computer program to simulate conveyance
of the flow downstream to the Tyler Creek Interceptor Sewer and Otter Creek
Pumping Station. The purpose of this step is to determine the sizes, depths,
and slopes of the sanitary sewers needed to collect and convey wastewater
from the entire area.
4. Reevaluate the need for and capacity of the Northwest Interceptor Relief
Pumping Station. As you are aware, in the previous study, approximately 36
mgd was to be diverted from the Tyler Creek Interceptor Sewer to the Otter
Creek Pumping Station. This diversion obviously has a substantial impact on
the ultimate size and capacity of the Otter Creek Pumping Station. Elimination
or reduction of the diversion will reduce the size and cost of the pumping
station and force main.
Mr. James L. Kristiansen June 15, 1992
City of Elgin Page Four
We plan to discuss the preliminary results with you after completion of each step.
At the completion of the study, we will prepare a letter report for your final review and
approval.
The Sanitary Sewer Study will provide numerous benefits for the City. The
amount of flow to be conveyed from the various subbasins in the service area,plus the
depths,sizes,and invert elevations of the various interceptor sewers will be determined.
This information will be very helpful in the future as additional interceptor sewer
extensions are constructed. The single largest benefit is that the City will be assured
that the sewer sizes, depths,and invert elevations of the interceptor sewer network
will be optimized, which could reduce the overall cost of the sewer network
significantly.
This may seem like redundant effort because the previous report is less than two
years old. However, determination of the sewer capacities, sizes, depths and invert
elevations is vital for the proper planning of the Otter Creek Pumping Station and Tyler
Creek Interceptor Sewer. Furthermore, the careful planning of a project of this size can
Y '
1 , reduce the overall total cost of the project. For example,if reassessment of the flow rates
and analysis of the sewer network indicate a reduction of the size of this portion of the
Tyler Creek Interceptor Sewer from 48-inch to 42-inch, the Citysave$100,000 in
P may
' construction costs alone. This savings is about eight times the cost of the study.
The Sanitary Sewer Study is the cornerstone in our approach to this project. We
have performed numerous sanitary sewer master plans and sanitary sewer studies of this
type. As you are aware, we prepared a storm water master plan for the City of Highland
Park. During the study, we evaluated alternative programs that had been presented by
previous consultants and provided recommendations that reduced the overall cost and
improved the effectiveness of the storm water collection system improvements. We
Mr. James L. Kristiansen June 15, 1992
City of Elgin Page Five
would use this same innovative approach to plan the Otter Creek Pumping Station and
Tyler Creek Interceptor Sewer. Since the Study is critical to the success of the overall
project, I will be performing most of the analysis and evaluations.
After completion of the Sanitary Sewer Study, review and approval by the City
Staff, the two parts of the project can be separated. Each part is discussed below.
Part 1 - Otter Creek Pumping Station
Some of the key design features of the pumping station were listed above. Our
plans to determine the preferable choice for each of these items are presented below.
• Capacity-The City's Planning Director,Roger Dahlstrom,has estimated the
tributary population to the pumping station in the year 2000 and 2010 to be
10,123 and 17,491, respectively. The pumping station must be designed to
meet the estimated 2010 needs and be expandable to meet the future require-
ments of the service area.
Thus, the most critical part of planning is developing a pumping station
which can be easily expanded to meet increasing needs in the future. This can
be accomplished by providing modular, semi-independent pumping facilities
constructed as the future flows to the pumping station increase. This can also
be accomplished by constructing a pumping station large enough for the
ultimate requirements but equipped only for the immediate needs. We would
compare the advantages,disadvantages, and costs of these two alternatives to
select the most cost-effective choice.
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Mr. James L. Kristiansen June 15, 1992
City of Elgin Page Six
• Wet well -The size and configuration of the wet well will be fully evaluated.
If one large wet well is selected, the wet well may be partitioned into two or
more compartments which will be used when the flow rates and needs require.
This will reduce operational problems caused by excessive wet well capacity.
The wet well depth will be determined by the Sanitary Sewer Study described
above. One of the key features of the Study is to determine the sewer invert
elevations and sizes necessary to convey the wastewater from the service area
to the pumping station. The need for sewage screens or comminutors will also
be considered because they will effect wet well depth and configuration.
• Pumps-Numerous types of pumps are available. However,given the size and
required capacity of this pumping station, we believe that two main types
should be considered: Centrifugal pumps versus submersible pumps. In either
case, pumps should be such that their discharge rate can match the variable
incoming flow rate. This can be accomplished either through electrical
controls, such as variable frequency motors, or through hydraulic controls,
such as through the pre-rotation basins for Hidrostal pumps. We would review
the feasibility and costs of both types of pumping facilities. We do not believe
that constant discharge rate pumps are the right choice for a pumping station
of this size.
• Emergency power source-The pumping station should be equipped with an
emergency power source to provide reliability even during extended power
failures. We would compare the costs and feasibility of engine driven emer-
gency power generators versus dual power supplies from separate Common-
wealth Edison substations.
Mr. James L. Kristiansen June 15, 1992
City of Elgin Page Seven
• SCADA-A Supervisory Control and Data Acquisition(SCADA) system will
provide automatic operation and control of the pumps and engine generator
from a remote location. The SCADA system will also provide information on
pumping flow rates and station status to the Public Works/Engineering
Departments. We will work with the City's Staff to identify the needs and
requirements for the SCADA system and present alternatives which would
meet the current needs and be expandable for future requirements. This could
include expansion of the system to serve other facilities such as your planned
water treatment facility at a central SCADA center.
• Piping layouts and building arrangement - The ultimate piping layout,
building arrangement,and site size will be determined by the items described
above (capacity, wet well, pump type, and emergency power source). The
building and piping layout will be clearly presented in our design report to
provide sufficient information regarding the proposed immediate and future
building needs.
• Architectural style-The site of the pumping station is located across the road
from an existing residential development. The station should be aesthically
pleasing and some special architectural styling may be desired. On past
projects,we have used architectural sketches of proposed buildings to respond
to comments and questions from neighbors.
• Force main system- One of the significant difficulties with the design of this
pumping station is the wide flow range that will occur from initial operation
to ultimate development. The force main system must be designed to convey
the flows without allowing deposition of solids, production of hydrogen
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Mr. James L. Kristiansen June 15, 1992
City of Elgin Page Eight
sulfide,water hammer and surges,or excessive head loss. We have discussed
two obvious alternatives during previous meetings. Those are: (1) multiple
force mains in the same trench, or(2) a large force main with small, internal
carrier pipes for intermediate needs.
Several parallel force mains, used singly or in combination,could convey
flows ranging from 1.5 to 64 mgd without excessive head losses and with self-
cleaning velocities. These pipes could be constructed simultaneously in the
same trench to minimize construction and installation costs. The force mains
would be utilized as needed to meet the output requirements from the pumping
station. This alternative has an additional advantage in that in the event of a
force main break,the other force mains could be utilized to provide temporary
service as repairs are made. Another force main alternative is to install a single,
large diameter force main, capable of conveying the ultimate flow from the
service area. Smaller diameter pipes would be installed inside the main pipe
to meet intermediate needs. The internal pipe would be removed and replaced
with a larger diameter pipe as needs increase.
Our scope of services . . .
Our specific scope of services for Part 1 of this project is listed below.
The Otter Creek Pumping Station design report will be divided into two phases.
Phase 1 will consist of the identification of the design concepts which appear
feasible and practical for the pumping system. Phase 2 will consist of a
preliminary design report for the selected pumping station alternative. The
phases are described in detail below.
Mr. James L. Kristiansen June 15, 1992
rik City of Elgin Page Nine
PART 1 - Phase 1 - Design Concepts
Goals: Identify and evaluate feasible alternatives for the design of the
pumping station and force main. Steps to accomplish this include . . .
1. Using information from the City's Planning Department and the results of
the Sanitary Sewer Study to calculate the projected flow rates from the
service area for the year 2010 and the ultimate population.
2. Meeting with public works personnel,engineering department personnel,
and senior designers to brainstorm feasible pumping station concepts. This
input will provide us with valuable insight regarding the preferred options
to form an initial list of concepts.
3. Evaluating alternative design concepts. This will allow us to determine the
elbk advantages, disadvantages, and preliminary cost estimates for each alter-
native.
4. Ranking the alternatives by desirability. Based on the information accu-
mulated through the evaluation,we will evaluate the alternatives based on
advantages, disadvantages, and costs.
5. Discussing the preliminary ranking with City staff. This input will allow
us to modify the ranking based on your comments.
6. Identifying the preferred design concept.
7. Preparing a written report for presentation to the City. The report will
provide you with the necessary information to make an informed decision
in accepting the preferred design concept.
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Mr. James L. Kristiansen June 15, 1992
City of Elgin Page Ten
Part 1 - Phase 2 - Preliminary Design Report
Goal: Identify the key design criteria for the pumping system and prepare
more accurate and comprehensive cost estimates for the pumping station and
force main.
Steps to accomplish this include . . .
1. Obtain up-to-date aerial photographs and topographical maps of the
tributary area. In particular,we will focus on the proposed site of the Otter
Creek Pumping Station and the routes of trunk sewers serving the pumping
station. Additionally, at this stage, we will obtain photographs of the
probable force main route. We will also visit the site to verify the
photographs and topographical maps. This information will provide us
with a good understanding of the site and surrounding area.
2. Determine influent sewer size, route, and depth using the results of the
Sanitary Sewer Study. This is a key task because the depth of the pumping
station is an important factor in determining design requirements and cost.
3. Prepare preliminary building layouts for the expected immediate and
future requirements. Included in this information will be the preliminary
pump selection and locations,piping routes and sizes,wet well configura-
tion and size, and structure depth.
4. Present the preliminary layout drawings to the City staff for review and
acceptance.
5. Prepare more detailed layouts and building section drawings for review
and acceptance by the City staff. In addition,at this point,we will discuss
with City staff the architectural style required for the pumping station.
Mr. James L. Kristiansen June 15, 1992
City of Elgin Page Eleven
6. Verify the City's acceptance of this information after review.
7. Prepare cost estimates for the design and construction of the pumping
station and force main.
8. Prepare a final report presenting the design sketches and cost estimates.
Part 2 - Tyler Creek Interceptor Sewer
This portion of the project consists of the preparation of detailed design drawings,
specifications,and contract documents for the construction of the interceptor sewer from
Randall Road to the boundary line of the Village of Gilberts'Facility Planning Area. The
sewer will be constructed in two phases. Phase 1 will extend northwesterly from Randall
Road to Big Timber Road. Phase 2 will extend northwesterly from Big Timber Road to
the Village of Gilberts South FPA boundary line.
Although the sewer will be constructed in phases,the engineering design services
for both phases will be identical. For the purposes of this Proposal, we have considered
both construction phases as a single design project.
The detailed scope of services for this part of the project consists of the following:
1. Utilise information from the Santiary Sewer Study which identify flows,
sewer sizes, invert elevations, and depths.
2. Perform detailed field surveys of the preliminary routes.
3. Meet with the City Staff to finalize the routes and discuss right-of-ways and
easement needs.
4. Prepare construction drawings, specifications, and contract documents for
review and approval by the City.
Mr. James L. Kristiansen June 15, 199214)
City of Elgin Page Twelve
5. Prepare Illinois EPA permit applications for the construction and operation of
the sanitary sewers.
6. Prepare estimates of probable construction costs based upon the construction
documents.
Other Concerns
Some photographs of the route of the interceptor sewer are attached. We have
reviewed the route and feel that the key concerns are related to the proximity of Tyler
Creek. Those concerns include encroachment on wetlands and the possible existence of
poor soils.
The National Wetland Inventory Maps indicate wetlands adjacent to Tyler Creek
from Randall Road to the Gilberts Facility Planning Area. Encroachment in wetlands is
regulated by the U.S.Army Corps of Engineers. The location and quality of the wetlands
will be carefully reviewed and identified during the selection of the final routes to avoid
or reduce wetland encroachment.
The Kane County soil maps indicate that some poor soils may exist along Tyler
Creek. These soils may not have sufficient bearing capacity to support a large diameter
sanitary sewer. Some soil borings may be necessary in order to determine the extent and
depth of these unsuitable soils. Wherever these unsuitable soils are located, the design
documents will show the proper construction methods to support the pipe.
I
Mr. James L. Kristiansen June 15, 1992
City of Elgin Page Thirteen
What's next?
We trust that the above discussion adequately demonstrates our understanding of
the project, the City's needs and your concerns. Our approach will be practical and
efficient. The proposed Sanitary Sewer Study will provide lasting benefits to the City and
could reduce the project cost by significant savings.
I will be the Project Manager for your project. As you know, I have worked on
similar sanitary sewer investigations, pumping station designs, and major sanitary
interceptor sewer construction projects. My resume and the resumes of other project
team members are included in this Proposal. Also included is our detailed scope of
service, schedule, and technical qualifications to complete the work.
Our proposal is divided into the following sections:
ego.,, Detailed Scope of Services
Project Schedule
General Qualifications
Specialized Qualifications and References
Professional Resumes
I will call you next week to answer your questions or provide any additional
information that you need.
We are truly enthusiastic to work with you to meet the demands of your growing
community and the challenges presented in this project.
Very truly yours,
BAXTER & WOODMAN, INC.
ENVIRONMENTAL ENGINEERS
' Darrel R. Gavle, P.E.
DRG:bt
920230
Encl.
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