Request for Qualifications
City of Show Low Wastewater Facilities Master Plan
Project Number S-4724
The City of Show Low (City) invites professional engineering firms to submit a statement
of qualifications to provide professional engineering consulting services for a wastewater
facilities master plan.
Overview
The City of Show Low operates a wastewater utility that serves its citizens residing
within the corporate limits of the city. This system includes collection and treatment of
effluent. Treated effluent is fed to constructed wetlands which provide enhanced habitat
for wildlife.
The wastewater collection system includes approximately 2,700 manholes ranging from
48-inches diameter to 72-inches diameter. The gravity portion of the collection system
includes over 630,000 linear feet of pipe ranging from 4” to 36”. And pipe materials
including PVC, Clay, Ductile Iron, Cast Iron AC, and Truss Pipe.
There are two areas in the system that utilize Low Pressure Sewer systems. These
systems have over 140,000 linear feet of pressure pipes ranging from 1” to 6”. These
systems also have fresh water augmentation stations to aid in odor control.
There are 27 sewer lift stations with over 62,000 linear feet of force main ranging in size
from 1” to 18”.
In 2016, the City of Show Low completed the construction of upgrades to the wastewater
treatment plant. The improvements included new headworks screening, two clarifiers,
two extended aeration - activated sludge basins, biosolids de-watering press and
disinfection. The upgraded plant has a 2.4 million gallons per day capacity.
Treated effluent is pumped to a system of constructed wetlands. The wetlands are on
United States Forest Service (USFS) land. The wetlands are operated and managed
through a partnership between the City of Show Low, Arizona Game and Fish
Department and the USFS
The City maintains a comprehensive GIS database for the wastewater infrastructure.
The master plan will use this existing data and supplement the data as needed to
produce a GIS based dynamic model of the City’s wastewater collection system.
Maintenance of the City’s wastewater infrastructure is performed by the Public Works
Operations Division which consists of 50 staff, and a fleet of heavy equipment and
vehicles.
Other background and reference materials that the City will provide are; lift station
operating data, the 2006 Wastewater Master Plan, other plans and reports pertinent to
the master planning.
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Specific Master Plan objectives include:
Wastewater System Model and Design Criteria
- Determination of flow duty factors for each land use category.
- Determination of Peaking factors and other design criteria for modeling and
design.
- Determination of base wastewater flows, groundwater and rainwater infiltration
and inflow.
- Analysis and modeling of current and future flows.
Evaluation of Existing Facilities
- Review of existing lift stations.
- Analysis of lift station capacity, current and future.
- Analysis of pumps and pump settings to optimize current and future operations.
- Detailed existing and future wastewater collection system evaluation and
recommendations taking into consideration infrastructure age, material type, size,
condition, etc.
Capacity Analysis
- Based on the developed design criteria, create a Collection System Hydraulic
Model (GIS-based) to identify areas operating at or over capacity.
- Identify areas in the system where upgrades are necessary to provide capacity
for projected growth.
Capital Improvement Plan (CIP)
- Detailed existing and future wastewater collection system evaluation and
recommendations taking into consideration infrastructure age, material type, size,
condition, etc. This information will be used to create a CIP to include a
prioritized list of needs for a 20-year planning period with associated cost
estimates and possible funding options.
- An independent rate study will be completed under separate contract and is not
included in this project.
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Scope of Services
The following scope of services is a broad representation of the desired work for the
completion of a Wastewater System Master Plan by a qualified engineering consultant.
The scope of services is intended to provide interested consultants with an
understanding of the project extent and a background for their submittal.
General Project Management
The consultant shall prepare agendas for and attend project status meetings. The
consultant shall be responsible for the preparation of written minutes that document
discussion items, items of concern, and action items.
The consultant shall monitor the progress of the project from a schedule and budget
perspective and submit to the City a monthly invoice and report indicating work progress
versus the planned schedule and expenditures versus the planned budget by task.
The consultant shall make milestone deliverable presentations to the City upon
completion of technical memorandums documenting the findings, decision making
process, and conclusions of work performed. Technical memorandums will be required
at the completion of all significant work efforts or activities.
The consultant will be expected to attend meetings and make presentations to the City
Council. The consultant will make up to two presentations to City Council. One will be a
progress presentation. The timing and necessity of this presentation will be determined
jointly by the consultant and city staff. The other presentation will be required at the
conclusion of the project.
System Evaluation
The selected consultant will work with city staff to create a complete inventory of the
wastewater infrastructure. Much of this information already exists as a part of the city’s
GIS database. The existing data will be provided to the consultant for their use. The
consultant will work with city staff in evaluating the completeness of the data. Then the
consultant will collect any additional data necessary to produce a comprehensive data
base and system model. The consultant will provide the data in a format that can be
integrated into the city’s current GIS system.
Assessment of Future Needs
Future needs will be assessed by the consultant using available information which will
include population growth projections, city zoning, future land use projections, developed
design criteria and other sources. The assessment will include collection systems and to
a lesser extent, the treatment systems. A study of current and future staffing will also be
required. Although a rate study is not a part of this master plan, the consultant will be
tasked to review the existing rate study in order to provide better insight to the city’s
funding capabilities.
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System Modeling
The consultant will produce a system model. This task will include selecting and
providing the modeling software. The consultant will recommend the specific software
package for this model. The software must be capable of integrating with the city’s
existing GIS database. The model must be capable of expansion and modification with
new infrastructure and operational changes. The consultant will use the design criteria
developed in the master planning document for the model. The consultant will also
provide training for city staff.
The city will provide available data including location, size, material and invert elevations
of pipes and manholes and locations, wet well size, and pump data for lift stations.
Capital Improvement Planning
The Master Plan will include a 20-year Capital Improvement Plan. This plan will expand
the city’s current 5-year CIP. The plan will use the information in the sections described
above to develop CIP projects for collection system capacity and condition, and
treatment capacity upgrades. Each project in the CIP will include an exhibit map and
line-item cost estimate. The consultant will work with city staff to rank priorities. The
consultant will also make recommendations on annual budget levels required to fund the
CIP.
Selection Process and Schedule
The professional engineering firm will be selected through a qualifications-based
selection process. The following tentative schedule has been prepared:
Request for Statement of Qualification Advertisement:
Pre-Submittal Conference:
Deadline for Written Questions
Statement of Qualification Due:
Letters to Finalist Firms:
Interviews of Finalist Firms:
City Council Award of Professional Services Agreement:
02/09/24, 02/13/24
02/22/24, 3:00pm
02/29/24, EOB
03/15/24, 4:00pm
03/21/24
Week of 03/25/24
04/02/24
Upon receipt of the Statement of Qualifications (SOQ), each submittal will be reviewed
for compliance with the submittal requirements. The selection committee will evaluate
each SOQ according to the criteria outlined in this document and will select at least three
(3), or up to five (5), professional engineering firms for interviews. During the interviews,
the firms on the final list will present information on their qualifications and their
understanding of the project. The selection committee will be afforded the opportunity to
question the firms on their presentations. At the completion of the interviews, a ranking
of the final-listed firms, in order of preference, will be developed from the selection
committee’s evaluation of the SOQ, presentations, and responses to questions.
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The City will enter into negotiations with the highest ranking or best-qualified firm to
develop a scope of services, a contract fee, and terms of the professional services
agreement. City Council approval is required. If the City is unsuccessful in negotiating a
contract with the best-qualified firm, the City may then negotiate with the second or third
most qualified firm in order of preference until a contract is executed, or the City may
decide to terminate the selection process.
Pre-Submittal Conference
There will be a mandatory pre-submittal conference for firms interested in providing
professional engineering services at the time and place listed below:
Time:
Date:
Location:
3:00 P.M. Arizona Time
02/22/24
City of Show Low City Hall
180 North 9th Street
Show Low, Arizona 85901
At this meeting staff will discuss the scope of work, contract issues, and respond to
questions from the attendees.
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