ITEM 1 Wasterwater System Master PlanningCity of Otsego Wastewater System Master Planning
Wastewater Collection and Treatment Master Plan
Assumptions:
The flow split between the West WWTF and the East WWTF will be determined through an
iterative evaluation of alternatives to optimize the City's wastewater treatment infrastructure
Assumes that GIs of the collection system exists as a basis for determining flow splits
Scope items highlighted yellow are to be led by City Engineer and/or City Planner with AE2S
input/review only
Note that items in italics are not required, but would help facilitate a better
Baseline Planning
• Baseline Planning Workshop with City Staff/Key Stakeholders
• Development of Utility Planning Horizons
• Land Use Review/Confirmation (East and West WWTF service areas)
• Population Projections Review/Confirmation (East and West WWTF service areas)
Wastewater Generation Rates Projections (flows and loads)
• Regulatory review (MPCA coordination, future discharge limits projections, East and West
WWTFs)
• Technical Memorandum Development and Presentation
WWTF Planning
• Existing Conditions
o Age/condition framework (desktop) based upon age of WWTFs
o Determine hydraulic and load capacity of existing East and West WWTFs
o Document hydraulic and load capacity of existing East and West WWTFs
o Identify liquid treatment deficiencies and redundancy issues (East and West WWTFs)
o Summarize previous biosolids system planning (West WWTF)
o Identify biosolids system deficiencies (East WWTF)
Alternatives Kick -Off Meeting
Alternatives Pre -Screening
o Identify up to five potential liquids treatment alternatives at each WWTF (ten total)
o Identify two biosolids alternatives for each WWTF and two consolidated biosolids
alternatives (six total)
o Develop qualitative scoring factors for the preliminary alternatives
o Conduct pre-screening of alternatives (likely a Kepner-Tregoe analysis) or
combinations of liquids/biosolids alternatives to "short-list" three to four alternatives
for further consideration
Land Acquisition Analysis
o Determine land availability and cost to support alternatives outside of the existing
WWTF footprint(s).
o Determine land availability and cost for additional buffer.
WWTF Alternatives
o Further Development of Pre -Screened Alternatives
o Alternatives Evaluation (advantages/disadvantage;
Otsego WWTF Planning Draft— October 21, 2015
AE2S
o Alternative Cost Opinions
o Alternatives review meeting
• Implementation
o Conclusions and Recommendations
o Phasing and Implementation Schedule
• Documentation
o Technical Memorandum / Report
o Subcommittee Presentations (three assumed)
o Council Presentation
Collection System Development
• The Collection System task and flow split alternatives are intended to be developed
concurrently with the treatment preliminary alternatives
• This task assumes that "local" development collection system layouts will not be modified,
but the trunkline/interceptor system would be reconfigured to optimize the split between the
W WTFs
• Collection and Review of Existing Data
o Assumes City GIS collection system data includes required information (needs to be
confirmed)
o Data Coordination
• Wastewater Collection System Model Development
o Model Development and Mapping
o Three alternatives for modifying the flow split between the east and west WWTFs
• Wastewater Collection System Alternative Cost Opinions
Evaluation of Collection and Treatment Alternatives
• Document the matrix of collection and treatment system alternatives that form viable
combinations
• Evaluate combinations based upon cost and non -cost factors
• Implementation
o Conclusions and Recommendations
o Phasing and Implementation Schedule
• Documentation
o Technical Memorandum / Report
o Subcommittee Presentations (three assumed)
o Council Presentation
Otsego WWTF Planning Draft —October 21, 2015
AE2S
Antirinatpd Fee Ranges (Base Scone)
L:
Baseline Planning
Fee Range
$3,000
$5,000
East and West WWTF Planning
$45,000
$55,000
Collection System Planning
$4,000
$8,000
Evaluation of Collection/Treatment
Combinations
$4,000
$10,000
Total
$56,000
$78,000
Note that fee ranges are estimated based on past experience and were not developed based on detailed
projections with specific staff.
Additional Scope Items
• Items highlighted in yellow are assumed to be primarily conducted by the City Engineer and City
Planner; scope is included for collaboration and input only
• Existing WWTF condition assessment (on -site, detailed) —West WWTF and East WWTF
o Process, electrical, and structural
o Documentation technical memorandum
o Rehabilitation/replacement/reinvestment summary for larger (>$25,000) items
o Budget range $30,000 - $35,000
o Would provide clarity to existing conditions if evaluating ag%onditions assumptions
becomes critical to alternatives selection or for refinement of a phasing plan.
• Environmental Assessment Worksheet
o Likely an MPCA requirement for expansion projects, but depends on the
recommendation
o Recommend conducting EAW when project implementation is on the horizon because
environmental work can have a "shelf life"
• Detailed odor control evaluation
• Tasks for additional facility planning requirements to meet State Revolving Fund criteria (this
would be follow on from the Master Plan recommendation and be timed with the EAW)
o Likely structured as a Facility Plan Amendment to the Master Plan to streamline the
process
• Wastewater Utility Financial Review (this work assumed to be conducted "in-house" by the City)
o Financial Data Request and Review
o CIP Development/Refinement from planning tasks outlined above
o Develop 10 year financial proforma/Gap Analysis (including appropriate escalation
factors):
■ Administrative Expense
■ Operations and Maintenance Expense
■ Debt Service Requirements (CIP)
Otsego WWTF Planning Draft— October 21, 2015
AE2S
■ Reserve Requirements
■ Baseline Rate Revenue including growth projections
■ Other Misc. Revenues
o Gap Closure Analysis
■ Rate increase scenarios
o Regional Rate Comparison Analysis
o Outside funding needs analysis
o Action Planning
o Summary Technical Memorandum and Presentation to Council
Otsego WWTF Planning Draft —October 21, 2015 AE2S