Wastewater Treatment Plant Upgrades 2020 SRF Project Plan Public - - PowerPoint PPT Presentation

City of Cheboygan Wastewater Treatment Plant Upgrades 2020 SRF Project Plan

Public Hearing Presentation July 14, 2020

1

• Present State Revolving Fund (SRF) Project

Plan

• Provide a forum for Community Participation

– SRF Loan Program Overview – Project Plan and Alternatives – User and Overall Project Costs – Social & Environmental Impacts – Mitigation of the Impacts – Schedule – Questions

Overview Project Plan Cost Impacts Schedule Questions

PURPOSE OF THE PUBLIC HEARING

2

WHAT IS THE SRF LOAN PROGRAM?

Provides low-interest loans (currently 2.0%) for planning, designing, and constructing eligible wastewater projects. Administered by EGLE Revolving Loan Section. To qualify, the City must:

• Must prepare and submit an EGLE approvable Project

Plan

• Provide a Public Hearing and Comment Opportunity

for the Plan

• Pass a Council Resolution adopting the Plan

Final EGLE approval and City acceptance of the loan is decided later in the SRF Loan Program.

Overview Project Plan Cost Impacts Schedule Questions 3

WHAT IS A WASTEWATER TREATMENT PLANT (WWTP)?

Overview Project Plan Cost Impacts Schedule Questions 3

HISTORY OF THE CHEBOYGAN WWTP

Overview Project Plan Cost Impacts Schedule Questions 3

• The Wastewater Treatment Plant (WWTP) is the City of

Cheboygan’s municipal wastewater treatment facility. – The WWTP provides treatment to all commercial and domestic (residential) wastewater. – Wastewater from homes and businesses is pumped from to the WWTP from the City of Cheboygan and Inverness Township. – treats it in accordance with its NPDES permit with subsequent discharge to the Cheboygan River.

• The plant was originally constructed in 1946.
• The plant was modified and/or expanded in 1975 & 1998.

PROJECT LOCATION

Wastewater Treatment Plant

WWTP UPGRADES PROJECT INTRODUCTION AND NEED

• The WWTP Upgrades – Need for Project

– NPDES Permit Compliance

Weak organic concentration of incoming sewage causes the WWTP to not meet 85% removal of organic load.

– Aging Infrastructure

Plant facilities suffer from equipment breakdowns that are due to age and condition.

– Inefficient Solids Disposal System

Unreliable system results in large buildup of solids at the plant.

Overview Project Plan Cost Impacts Schedule Questions 4

ALTERNATIVE ANALYSIS

• No Action Alternative

– Not considered a favorable option – No Action will result in:

• Continued degradation of existing facilities
• Increasing difficulty in meeting discharge permit
• Risk of surface water quality issues
• More costly intervention in the future
• Compromise safety of workers and plant operators

Overview Project Plan Cost Impacts Schedule Questions 5

ALTERNATIVE ANALYSIS cont’d

• Regionalization Alternative

– Not considered a favorable option – No Action will result in:

• Decommissioning the WWRP and piping to facility
• Unable to provide treatment to City of Cheboygan

and Inverness Township

• Closest facility is Alpena which would require 80

miles of forcemain & several pumping stations

• Time-consuming
• Use tremendous amount of energy consumption

from pumping stations Overview Project Plan Cost Impacts Schedule Questions 5

Existing Final Clarifier (not functional) and Chlorine Contact Tank

Existing Electrical Equipment and Water System Tank

Existing Rotating Biological Contactor (1/2 are not functional), Grit Tank and Raw Sewage Piping

ALTERNATIVE ANALYSIS cont’d

• Rehabilitate Existing WWTP

– Feasible, and considered the Preferred Alternative – Perform various improvements at existing wastewater treatment plant

• Most construction activities located at existing facilities of the

WWTP, except for the oxidation tank which will be a new facility just outside of existing WWTP grounds.

• Improvements shown on next figure

Overview Project Plan Cost Impacts Schedule Questions 9

ALTERNATIVE ANALYSIS cont’d

• Rehabilitation of existing WWTP will provide:

– More Efficient Use of Energy and Capacity

Resizing and reconfiguring existing facilities (which require replacement) will reduce energy waste and operating expenses.

– NPDES Compliance

Rehabilitation and improvement projects will give the WWTP reliable infrastructure to meet the discharge limits and protect the water quality of the nearby river and lake.

– Replacement of Degraded Existing Facilities

Replacing failing equipment will provide more reliable operation, reduce maintenance/operating costs, and prevent treatment plant process failures.

Overview Project Plan Cost Impacts Schedule Questions 9

WASTEWATER PLANT UPGRADES PROJECT COST ESTIMATES

Overview Project Plan Cost Impacts Schedule Questions 11

WASTEWATER PLANT UPGRADES PROJECT USER COST ESTIMATES

Below is the project cost over a 20-year period: – This is NOT a proposed rate increase. – Option 1 is the user cost without 30% grant loan forgiveness. – Option 2 is the user cost with 30% grant loan forgiveness.

Overview Project Plan Cost Impacts Schedule Questions

Basis Annual Cost 30% Grant Loan Forgiveness Cost Monthly User Cost $16,000,000 $978,507 N/A $17.90 $16,000,000 $978,507 $684,955 $12.53

Option 1: Option 2:

IMPACTS OF PROJECT PLAN

• Short-Term Impacts:

– Positive Impacts

• Increase in jobs, and workers utilizing community

amenities and local contractors

– Negative Impacts

• Noise, dust, & traffic related to construction
• Long-Term Impacts:

– Positive Impacts

• NPDES permit compliance
• Removal of 85% organic load
• Improved efficiency and reliability at the WWTP
• Ability to continue adequate wastewater treatment

and public health protection

• Improved processing & reduced equipment wear

– Negative Impacts

• None

Overview Project Plan Cost Impacts Schedule Questions 13

IMPACTS OF PROJECT PLAN cont’d

• Irreversible Direct/Indirect Impacts:

– Non-recoverable resources (public capital, energy, labor & materials) committed to project are traded

• ff to provide necessary repair and replacement of

aging and worn-out structures and equipment – Possible construction damage or accidents

Overview Project Plan Cost Impacts Schedule Questions 14

MITIGATION OF IMPACTS

• Mitigation of Short-Term Impacts related to

Construction Activities

– Comply with any required permits (soil erosion, endangered species, etc.) – Follow regulations related to disposal and handling of asbestos containing material, lead paint, and any contaminated soils/groundwater, if encountered

• Mitigation of Long-Term Impacts

– Activities will prohibit the disposal of soils in wetlands, floodplains, or other sensitive areas Overview Project Plan Cost Impacts Schedule Questions 15

WASTEWATER SYSTEM IMPROVEMENT PROJECT SCHEDULE

Overview Project Plan Cost Impacts Schedule Questions Proposed SRF Schedule Task Completion Public Hearing Notice June 12, 2020 Draft Project Plan Available June 12, 2020 Formal Public Hearing July 14, 2020 Council Adoption of Project Plan July 14, 2020 Submit Final Project Plan to EGLE August 1, 2020 16

Task Engineering Services Timeframe WWTP Improvements Design Phase Aug 2020-Jun 2021 Construction Start Jun 2021 Construction End Dec 2022

QUESTIONS?

Overview Project Plan Cost Impacts Schedule Questions 20