Resolution 2014-11RESOLUTION NO. 2014-11(R)
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF WYLIE,
TEXAS, HEREBY REQUESTING THAT A STUDY BE PERFORMED BY
PERKINS ENGINEERING CONSULTANTS EVALUATING FUTURE
WASTEWATER NEEDS FOR THE CITIES OF WYLIE AND MURPHY.
WHEREAS, the North Texas Municipal Water District operates the Muddy Creek Regional
Wastewater System and the Muddy Creek Regional Wastewater Treatment Plant; and
WHEREAS, the Cities of Wylie and Murphy send flow into the system; and
WHEREAS, the average daily flow at the Muddy Creek Regional Wastewater Treatment Plant
is approaching 75% of the treatment plant's design capacity, and
WHEREAS, the Texas Commission on Environmental Quality regulations require that planning
activities for providing adequate capacity for future anticipated flows commence once the plant
flow has reached 75% of the plant's design capacity; and
NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF
WYLIE, TEXAS:
SECTION 1: The City Council requests a study be performed by Perkins Engineering
Consultants Inc. evaluating future wastewater needs for the cities of Wylie and Murphy and
requests the cost of the study be funded by Wylie and Murphy through the current FY 14 Muddy
Creek WWTP budget and through the FY 15 Muddy Creek WWTP budget.
SECTION 2: This Resolution shall take effect immediately upon its passage.
RESOLVED THIS THE 13`h day of May, 2014.
Resolution No. 2014 - 11(12) — Wastewater Study Performed by Perkins Engineering - Future Wastewater Needs
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ATTEST TO;
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Resolution No. 2014 -11(R) Wastewater Study Performed by Perkins Engineering -Future Wastewater Needs
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ATTACHMENT A
SCOPE OF SERVICES
NORTH TEXAS MUNICIPAL WATER DISTRICT
MUDDY CREEK REGIONAL WASTEWATER SYSTEMS EVALUATION FOR
THE CITIES OF WYLIE AND MURPHY
The average daily flow at the Muddy Creek Regional Wastewater Treatment Plant
(RWWTP) is approaching 75% of the treatment plant's design capacity. Texas
Commission on Environmental Quality (TCEQ) regulations require that planning
activities for providing adequate capacity for future anticipated flows commence once the
plant flow has reached 75% of the plant's design capacity. Therefore, this evaluation is
recommended based on the TCEQ regulations and the TCEQ issued permit for the
Muddy Creek RWWTP. Additionally, peak flows to the treatment plant have on occasion
exceeded the 2 -hour peak capacity allowed in the permit. Therefore, part of this
recommended evaluation will be to review the historical peak flows received at the
treatment plant and at critical locations along the Muddy Creek and Maxwell Creek
Trunk Sewer; and develop recommendations for adequately treating the peak flows. The
project will also consist of studying the impact on the Muddy Creek and Maxwell Creek
Regional Interceptor Systems (MC/MCRIS) and the Muddy Creek RWWTP if the
existing Wylie Wastewater Treatment Plant (Wylie WWTP) were placed back into
service. The project will also include a feasibility analysis related to the Muddy Creek
Regional Wastewater System (MCRWWS) of acquiring the existing Wylie WWTP. The
study area is generally defined as the current City limits and ETJ of Wylie and Murphy.
The tasks to be performed are as follows:
1. Review Available Data: _Perkins Engineering Consultants, Inc. (Engineer) will
review and utilize the most recent wastewater studies performed for Wylie and
Murphy and the NTMWD MC /PMCRIS and MCRWWS contracts.
2. Kick -off Meeting: Engineer will conduct a kick -off meeting with NTMWD,
Wylie, and Murphy staff to present the proposed approach that will be taken in
conducting the Study and to solicit input on the proposed approach to be taken.
Engineer will solicit existing and projected population and wastewater flow
information or assumptions the Cities would like to utilize in the Study. During
the kickoff meeting, Engineer will summarize the existing MC/MCRIS and
MCRWWS contracts and the requirements for the system to acquire additional
infrastructure. NTMWD will host the meeting.
Review and Document Wastewater Proiections: Engineer will coordinate with
NTMWD and the cities to obtain, review, and document population and
wastewater flow projections for the next twenty (20) years. Projections will be
provided annually for the first five years and in five year increments thereafter for
a total of twenty years. Flows should be identified by basin and pipeline
interceptor system for Wylie, Murphy, the MCRWWP and the Wylie WWTP.
Engineer will utilize data from the most recent wastewater studies performed for
the cities as a starting point. Engineer will submit draft projections to Wylie,
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Murphy and NTMWD, and based on comments received, revise projections as
necessary. Engineer will send revised projections to the Cities and NTMWD for
final approval for use in the Study.
4. Document and Map Existing Infrastructure: Engineer will document and evaluate
information on existing infrastructure. Engineer will prepare mapping showing
the City limits, ETJ, and wastewater facilities in the study area, including:
a. Existing and /or proposed connection points for reinstating the Wylie W WTP.
b. Wylie WWTP.
c. Location of meters and data.
d. Wastewater drainage basins.
e. MC/MCRIS pipelines to the Muddy Creek RW WTP
f. Maxwell Creek Parallel Trunk Sewer currently under design by the City of
Murphy.
5. Feasibility Study: Engineer will determine the feasibility of adding additional
infrastructure to the MCRWWS including:
a. Perform an evaluation of the existing Muddy Creek RWWTP including but
not limited to the following:
• Hydraulic analysis of the plants trains to identify any existing
bottlenecks.
• Cost analysis to relieve any bottlenecks that are identified.
• Analysis of the plants trains to identify any existing deficiencies in the
process that affect the plants ability to meet current regulatory
standards.
• Cost analysis to relieve any deficiencies in the process as identified
above.
• Cost analysis to add components to the plant required to insure that the
plant is capable of meeting current regulatory standards.
• Install a minimum of three (3) meters in the Muddy Creek Interceptor
and one (1) meter in the Maxwell Creek Interceptor, for a minimum 60
day monitoring period, Iocated near key pipeline intersections as
directed by the owner to determine average day dry flow ADDF and
two hour peak wet weather flow PWWF for each interceptor. Develop
a minimum of two options to handle and treat the PWWF into the
MCRWWS.
• Provide costs for each city for both proposed PWWF options. Costs
should be divided according to the percentage of PWWF attributed to
each city based on the flow monitoring.
• Option 1 - Based on the updated wastewater projections identify
the proposed date the next plant expansion needs to be on line.
• Option 1 - Provide planning level cost projections for the next
projected plant expansion.
• Option 1 - Provide planning level cost projections for the next
projected pipeline parallel of the Maxwell Creek Interceptor and
Muddy Creek Interceptors.
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Option 2 - Based on the interceptor metering efforts update the
wastewater projections and identify the proposed date the next plant
expansion needs to be on line.
Option 2 - Provide planning level cost projections for the next
projected plant expansion.
Option 1 - Provide planning level cost projections for the next
projected pipeline parallel of the Maxwell Creek Interceptor and
Muddy Creek Interceptors.
b. Perform an evaluation of the existing Wylie WWTP including but not limited
to the following:
• Hydraulic analysis including diverting flow back into the plant and
splitting flow between the two plants.
• Mechanical evaluation with NTMWD personnel to determine repairs
and /or upgrades needed to place the plant into service. Include costs
and installation schedule for any needed repairs and/or upgrades.
• Develop a budget for plant O &M going forward and a projected
annual budget for plant O &M.
• Identify existing plant capital costs, remaining debt service and the
effects of incorporating these into the MCRWWS.
• Calculate the replacement costs less deprecation (RCLD) of the Wylie
WWTP and develop a minimum of two options to calculate Murphy's
proposed infrastructure cost, if any, to Wylie for incorporating the
WWTP into the MCRWWS
• Identify the benefits to Wylie of only Wylie flows being treated at the
Wylie WWTP including the cost of plant O &M and the effects on the
MCIS and the MCRW WTP
c. Potential changes to current planned plant upgrades as developed in the
options above and or expansions based on projected average daily flow, peak
flows and additional treatment capacity from the Wylie WWTP
d. Determine and identify benefits of adding the Wylie WWTP capacity to the
MCRWWS including but not limited to the following:
• Benefits of deferring planned expansions at the MCRW WTP
• Identify existing plant capital costs, remaining debt service and the
effects of incorporating the Wylie WWTP into the MCRWWS.
• Additional partners sharing O & M costs of the Wylie WWTP
• Potential reuse benefits
• Any additional benefits
e. Prepare construction cost estimates detailing cost for projected upgrades or
expansions to the MCRW WTP that may be required with and without the
addition of the Wylie WWTP to the MCRWWS.
f. Provide costs for each task listed above in a tabular form for each city based
on the percentages outlined in the MCRWWS contract.
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g. Provide costs for each task listed above in a tabular form for each city based
on the percentages developed from the Interceptor system monitoring.
6. Draft Report: Engineer will summarize findings in a draft report and present one
(1) electronic copy of the draft report to the NTMWD, Wylie and Murphy for
review and comment.
7. Review Meeting: Engineer will meet with NTMWD, Wylie and Murphy staff to
discuss results of the study. NTMWD will host the meeting.
8. Final Report: Engineer will incorporate comments received from NTMWD,
Wylie and Murphy and provide fifteen (15) hardcopies and one (1) electronic
copy of the final report to the NTMWD, Wylie and Murphy.
The estimated time to complete the Study is approximately eight months. Assistance
from NTMWD and the cities in obtaining pertinent data on the existing wastewater
systems, population studies and other existing studies is a portion of this Study.
END OF ATTACHMENT A
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