R02-129RESOLUTION NO. R02- /,,~ ~?
A RESOLUTION OF THE CITY COMMISSION OF THE
CITY OF BOYNTON BEACH, FLORIDA,
AUTHORIZING THE MAYOR AND CITY CLERK TO
EXECUTE TASK ORDER NO. 13, BETWEEN THE
CITY OF BOYNTON BEACH AND CH2M HILL IN THE
AMOUNT OF $93,600 FOR THE MASTER L~T
STATION 356 SERVICE AREA CONVEYANCE
CAPACITY ANALYSIS; AND PROVIDING AN
EFFECTIVE DATE.
WHEREAS, Lift Station 356 is the largest Master Lift Station in Boynton Beach,
and is located at the east end of Boynton Beach Blvd., just north of the marina area; and
WHEREAS, this task order will provide engineering services for a capacity
evaluation of the Lift Station 356 collection system;, and will include the gravity system,
the tributary lift stations and Lift Station 356 including the discharge force main; and
WHEREAS, the City Commission upon recommendation fi:om staff, deems it
appropriate and in the best interest of the residents and citizens of the City to approve
Task Order No. 13 in the mount of $93,600 to CH2M Hill for the Master Lift Station
356 service area conveyance capacity analysis.
NOW, THEREFORE, BE IT RESOLVED BY THE CITY COMMISSION
OF THE CITY OF BOYNTON BEACH, FLORIDA, THAT:
Section 1. The City Commission of the City of Boynton Beach, Florida does
hereby authorize and direct the Mayor and City Clerk to approve and execute Task Order
No. 13 in the amount of $93,600 to CH2M Hill for the Master Lift Station 356 service
area conveyance capacity analysis.
Section 2.
This Resolution shall become effective immediately upon passage.
PASSED AND ADOPTED ~his ~ ~
day o£August, 2002.
CITY O~ BOYN~TON BEAC~H,
FLORIDA
ATTEST:
City Clerk
(Corporate
Commissioner
Commissioner
Task Order No. 13
May 6, 2002
Lift Station 356 Service Area Conveyance Capacity Analysis
Background
Master Lift Station (L.S.) 356 is the City of Boynton Beach (CITY's) largest wastewater pump station.
Located east of U.S. 1 on Old Boynton Beach Boulevard, it's service area consists of the area bounded
by Boynton Canal to the north, Gulfstream Boulevard (southern City limits), 1-95 to the west, and the
Intracoastal to the east. The Town of Briny Breezes, a small community east of the Intracoastal, also
sends their wastewater to L.S. 356. The service area includes both an extensive gravity system as well
as many smaller lift stations that eventually feed L.S. 356. L.S. 356 discharges into a 20" force main
that ties into the CiTY's primary force main on Congress Avenue. The 20" L.S. 356 force main is the
only sewer line that crosses t-95 south of the Boynton Canal.
Most of the gravity sewers in this service area consist of clay pipe with brick manholes that are at
least 30 years old, and infiltration and inflow (I&I) has been a significant problem in this area. The
smaller t~ibutary lift stations all empty into manholes that eventually gravity flow to L.S. 356. L.S.
356 pumping facilities include a 1,500 gpm jockey pump that operates for a majority of the time with
two 3,200 gpm pumps providing alternating duty during peak flows. Actual flowrates for the large
pumps have exceeded 3,600 gpm when system pressures are low. The L.S. 356 force main is ductile
iron and believed to be in satisfactory condition.
Included in this service area is the Boynton downtown area slated for redevelopment. The CITY is
concerned that the gravity system, the small tributary lift stations, and L.S. 356 itself may not have
sufficient capacity to accommodate redevelopment plans. There are approximately 23 lift stations,
1,600 manholes, 16 miles of force main, and 53 miles of gravity piping in the study area.
CH2M HILL has previously conducted a study on the flow into and out of L.S. 356 and prepared a
rudimentary model of the force main network. The information gathered during the L.S. 356 stUdy
will be incorporated into this Capacity Analysis Task Order.
The Boynton Beach wastewater collection system has experienced significant infiltration
(groundwater entering through leaky pipes) and inflow (stormwater that enters the system through
direct connections, manholes, and other access points). As a result of the I&I problems the CITY has
initiated efforts to identify sources of the I&I and means to reduce it.
The CITY has purchased several cameras, a survey truck and miscellaneous lining equipment. The
CITY has the capability of performing their own grouting and In Situ Form pipe lining. The CITY's
main efforts have been to put out fires and repair areas that exhibit a high degree of leakage. To date,
no efforts have been made to prioritize improvements or to quantify the repair results.
Boynton Beach pumps all of their wastewater to the Palm B~each county Southern Regional Water
Reclamation Facility. Currently the CITY is charged $700 per 1000 gallons of wastewater to the
SRWRF. The average Boynton Beach wastewater flow to the SRWRF is about 2,970 million gallons,
which results in an average yearly cost of $2,079,800
Based on other I&I study/rehabilitation work conducted for several utilities in southeast Florida, I&I
values can be expected to exceed 50% of the total flow in a collection system and a much higher
percentage of the peak flow. A thorough capacity evaluation must take into account I&I
contributions and weigh I&I reduction measures against capacity upgrades.
DFB/TO-CONVEYANCE356B,DOC 1
LIFT STATION 356 SERVICE AREA CONVEYANCE CAPACITY ANALYSIS
The CITY has requested CH2M HILL (ENGINEER) to prepare a Task Order to evaluate the capacity
of the L.S. 356 service area and recommend improvements to accommodate both existing and
projected wastewater flows.
Based on results of this Task Order, the City will have better defined information on where to direct
infiltration and inflow studies and repair work.
Objective
The purpose of this Task Order is to provide engineering services for a capacity evaluation of the L.S.
356 system, including the gravity system, the tributary lift stations to L.S. 356, L.S. 356 itself, and the
L.S. 356 discharge main. The evaluation will include recommendations for improvements including
upgrades to existing facilities as well as proposed new facilities.
The proposed work to be performed under this Task Order is to estimate the future dry weather and
peak wastewater flows into each of the listed lift stations using detailed planning, population, and
dwelling unit data.
The tributary lift stations are defined as the lift stations that eventually discharge to L.S. 356 and
include the following stations:
2O4
Lift Station 356 Tributary Pump Stations
206
2O7
210 4O2 4O3
404 405 406
4O7 4O8 4O9
410 411 412
413 414
Lift stations 101, 102, 103, and 104 are Briny Breezes lift stations that contribute to the L.S. 356 service
area. These lift stations will be handled as a large user point load at the first receiving manhole in
Boynton Beach.
To efficiently dedicate the City's resources to the areas that are anticipated to be most problematic,
the City has requested that the full study be limited the following lift stations and their respective
gravity systems:
Lift Stations/GravitySystems Subjected toFullEvaluation
2O4 206 2O7
210 356 410
412 414
These stations were selected for full evaluation because they are the closest systems to the
Intracoastal Waterway, where infiltration is expected to be the most severe, a_nd because they are
located in areas that are likely to experience significant development in the near future.
DFB/TO~CONVEYANCE356B.DOC
LIFT STATION 356 SERVICE AREA CONVEYANCE CAPACITY ANALYSIS
The other lift stations (402, 403, 404, 405, 406, 407, 408, 409, 411, and 413) will be subjected to a cursory
evaluation, which will include a review existing pumps and piping, and pump run data. Pressure
readings will be collected once at each of these lift stations. No evaluation of the gravity lines or an
I&I evaluation will be conducted for the gravity systems of these lift stations under this Task Order.
The contribution from these lift stations to the lift station 356 gravity system will be assumed to be
constant unless the City indicates that a specific development is slated for construction.
This Task Order also includes evaluating the large diameter gravity lines in the subject service area.
A large diameter gravity line is defined as any gravity sewer line 12-inches in diameter or larger. The
smaller gravity lines that feed the large diameter gravity lines are assumed to be sufficient for the
flows and will not be evaluated as part of the capacity analysis.
A. Scope of Work
The proposed scope of work for the engineering services requested is defined as follows:
Task I. Estimate Wastewater Flow
The ENGINEER will perform the following duties under this Task:
1. Collect the following information from the CITY:
· Population and demographic data
· List of large users and flow rates
· 5 years of monthly wastewater flow rates for the entire CITY
· List of planned and forecast developments with flow rates
· The densities permitted under each zoning category
· Plan and profile (or slopes) drawings for all of the gravity lines south of the Boynton Canal
and east of 1-95
· Wet well dimensions, pump curves, pump run time records, discharge piping diameters and
plans of the discharge piping lengths for all of the above-listed lift stations, including L.S. 356
2. Meet with the CITY to collect information regarding known problems areas such as, high
pressures, inability to meet peak flows, repeated line failures, poor piping or mechanical
conditions, and pump station problems.
3. The ENGINEER will determine the average number of persons per dwelling unit for single
family and multi-family dwelling units from available census or planning data.
4. Determine maximum potential dwelling units and commercial acreage in each large gravity line
and pump station :tributary area, based on existing zoning maps and anticipated redevelopment.
5. Determine average per capita wastewater generation rates based on a review of the last five years
of service area population data and the average wastewater flows into the Southern Regional
Wastewater Treatment Plant. No delineation between per dwelling unit wastewater generation
rates will be defined between older eastern developments and newer western developments.
6. Calculate the average residential flow from each large diameter line and pump station tributary
area.
7. Estimate the average commercial wastewater flow per acre based on typical wastewater
generation rates.
DFB/TO-CONVEYANCE356B.DOC
LIFT STATION 356 SERVICE AREA CONVEYANCE CAPACITY ANALYSIS
8. Calculate the average commercial wastewater flow from each large diameter line and pump
station tributary area.
9. Determine the average total wastewater flow from each large diameter line and pump station
tributary area.
10.
Estimate current wastewater flows into each large gravity line and pump station. The estimate
will be based on current zoning maps and aerial photographs showing current level of
development.
11. Compare the estimated current wastewater flows for each pump station to the actual average
flows experienced at each of the pump stations. The average flows will be based on historic
pump run times. The estimates will then be modified to more closely match actual conditions.
12. Determine a peaking factor for each large gravity line and pump station tributary area and apply
the peaking factor to each area to determine the peak wastewater flow.
13. Meet with the CITY to review calculated flow rates and obtain CITY comments.
Task II. Analyze Pump Station and Large Gravity Line Capacities
Hydraulic parameters of the discharge lines for the above-listed lift stations as well as the large gravity
lines will be calculated using spreadsheet-based programs. Hydraulic parameters of the L.S. 356 force
main will be calculated from L.S. 356 to where it connects to the CITY's primary force main on Congress
Avenue.
The ENGINEER will perform the following duties under this Task:
1. Prepare a spreadsheet program to determine theoretical hydraulic capacities for each of the
pump station discharge mains and the large gravity lines.
Meet with the CITY and their lift station I & C contractor, Data Flow. The ENGINEER will
prepare a list of parameters that are needed from each of the respsective lift stations. The CITY
will coordinate with Data Flow so that the existing equipment will collect the needed
information. The CITY will be responsible for installing any new devices such as pressure
gauges and rain gauges and the CITY is responsible for the accuracy Of the information collected.
The data collected shall be delivered to the ENGINEER by the CITY in a Windows based
spreadsheet format. Data will be collected by the CITY for a minimum of 30 days, with at least
one rain event occuring during testing.
Flow information on the large diameter gravity lines will be derived from the influent flow rates
collected at the lift stations. No flow measurements of the gravity lines themselves will be
conducted by the ENGINEER.
4. Incorporate the data collected from the previous study of L.S. 356.
5. Based on the information collected, the ENGINEER will determine the theoretical capacities for
each of the pump stations and the large gravity lines.
6. The ENGINEER will determine current and expected deficiencies in the system related to high
pressures, high velocities, or inability to meet flow demands. Expected deficiencies will be based
on forecast flow rates generated under Task 1.
7. The ENGINEER will evaluate various pumping and/or pipeline improvements and recommend
cost-effective alternatives. Improvements may include new or upsizing gravity and/or pressure
lines, modifications to existing pump stations, and construction of new pump stations. If it is
obvious that infiltration and inflow (I&I) is responsible for grossly excessive flows then I&I
DFB/TO-CONVEYANCE356B.DOC
LIFT STATION 356 SERVICE AREA CONVEYANCE CAPACITY ANALYSIS
improvements may be recommended. Specific I&I improvement options and costs will not be
evaluated.
8. Meet with the CITY to review improvement options and recommendations. Obtain CITY
comments.
Task III. Prepare Report
The ENGINEER will perform the following duties under this Task:
1. Develop order-of-magnitude cost estimates for the recommended improvement options.
2. Develop a 10 year capital improvement plan, with scheduling of improvements prioritized to
meet the projected peak flows.
3. Prepare a draft report detailing the results of this Task Order. Provide 5 copies of a draft report
for the crrY's review.
4. Meet with the CITY to discuss review comments. Incorporate the comments and prepare 10 final
copies of the report to the CITY.
Assumptions
The services described herein are based upon the assumptions stated in the Scope of Services and
below. If conditions differ from those assumed in a manner that will affect schedule or scope of work,
CH2M HILL will advise the CITY in writing of the magnitude of the required adjustments. The
following assumptions were made in the development of the scope of work.
Only the L.S. 356 service area will be evaluated. L.S. 356 pumps into the CITY's primary force
main on Congress Avenue. The impacts that the recommended improvements will have on the
primary force main or other pump stations that discharge to the primary force main will not be
evaluated.
· The number of manholes and lengths of piping used to develop this Task Order were based on
drawings provided by the CITY.
· CITY will provide recent aerial photos of the subject area..
· CITY staff will be responsible for obtaining lift station influent flow rates, pumping flow rates,
pressure and rain event data for all of the respective lift stations (through Data Flow). The CITY
will be responsible for the accuracy of the data collected.
· CITY staff will provide pressure taps (if not currently installed) at each pump station to be tested,
as instructed by the ENGINEER.
· CITY will be able to provide all the information requested within this Task Order.
· The CITY will provide or pay for all sample analysis.
· The CITY will provide secure sites for the rain gauge installations.
· A comprehensive model of the force mare system and/or the gravity sewer system will not be
prepared. Hydraulic modeling will be performed using spreadsheet based programs.
· Unless determined otherwise, existing pumps are operating on theft pump curves.
Additional Services
CH2M HILL will, as directed, provide additional services that are related to the project but not
included with this Scope of Services. These and other services can be provided, if desired by the
CITY, under separate task orders or amendments to this task order. Additional services will be
provided via lump sum in accordance with the Master Agreement for General Engineering
DFBf'rO-CONVEYANCE356B.DOC
LIFT STATION 356 SERVICE AREA CONVEYANCE CAPACITY ANALYSIS
Consulting Services. Work will begin for the additionaI services after receipt of a written notice to
prOceed from the CITY. Examples of additional services include the following:
· Preparation ora full-scale hydraulic model of either the gravity system or the force main system.
· Other than interviewing CITY staff, any work associated with determination of pipe condition,
such as excavation, pressure testing, coupon testing, or other structural integrity tests.
· Evaluation of any areas outside of the L.S. 356 service area.
· Installation and/or operation of flow or pressure monitoring equipment.
· An infiltration and inflow evaluation.
Each notice to proceed shah contain a description of the work to be undertaken, a budget establishing
the amount of additional fee to be paid to CH2M HILL and a time established to complete the work.
The CITY reserves the right to add or delete tasks at the CITY's discretion.
Schedule of Work
Work will begin promptly upon notice to proceed and will proceed in an expeditious manner until all
tasks are complete. The schedule assumes that the CITY is able o provide the required information in
a timely manner.
Deliverable
Task I, Meeting Re: Wastewater Flow Estimates
Task II, Meeting Re: Recommended Options
Task III, Draft Report
Task III, Final Report
Completion
16 Weeks from Notice to Proceed
20 Weeks from Notice to Proceed
24 Weeks from Notice to Proceed
4 Weeks from receipt of comments
DFB/TO-CONVEYANCE356B.DOc 6
LIFT STATION 356 SERVICE AREA CONVEYANCE CAPACITY ANALYSIS
Compensation
Compensation by the CITY to CH2M HILL for the services described in this Task Order shall be on a
lump sum basis in accordance with the Agreement. The estimated compensation for the services
described in the Task Order is $93,600. The table below summarizes the estimated costs anticipated
for this Task Order:
L.S. 356 Service Area Capacity Analysis
Task Labor Labor Expenses Total
Days Costs
Task I. Estimate Wastewater Flows 43 $29,900 $3,400 $33,300
Task II. Analyze Capacities 40 $27,400 $3,200 $30,600
Task III. Prepare Report 38 $26,600 $3,100 $29,700
Total 121 $83,900 $9,700 $93,600
APPROVED BY
/ v / ~ayor
Dated this lb day of ~ttgitt.~, 2002
Approved as to Form: ~ /~/. City Attorney
SUBMITTED BY
CH2M HILL, INC.
~ ]~ames qa~eHR
~ /Vice Pres~ent, Area Manager
Dated this g day of /W~ ,2002
DFB/1'O-CONVEYANCE356B.DOC 7