City of Glendive
31
City of Glendive Wastewater System Improvements Public Meeting Public Meeting April 26, 2011 April 2011 Presented by: Craig Pozega, PE Great West Engineering, Inc.
Transcript of City of Glendive
Glendive Public Meeting Presentation - CopyApril 2011
Presented by:
Why Are We Here?
Wastewater System Preliminary Engineering Report
PUBLIC COMMENT
What is a Preliminary Engineering Report (PER) Problem Definition Describes existing system Evaluate Alternatives including Selection of a Preferred
Alternative Establishes Costs and Potential Funding ScenariosEstablishes Costs and Potential Funding Scenarios Implementation Schedule Required by Funding Agencies to qualify for Grants PUBLIC COMMENT
Problem Definition
Montana Pollutant Discharge Elimination System (MPDES) Permit Must have a MPDES permit to discharge wastewater The City of Glendive was issued a new MPDES Permit
in December 2007 Permit contains many new monitoring, reporting and Permit contains many new monitoring, reporting and
recording requirements Compliance schedule to meet future permit limits
Problem Definition
Wastewater Disinfection Currently no disinfection of discharged effluent
Exposed Biosolids Vector Attraction
2010 Population Glendive 4,935 people
Projected Population (2030) Glendive 5,000 people West Glendive 2,226 peopleWest Glendive 2,226 people Annexation Areas 743 people Total With West Glendive 7,969 people Total Without West Glendive 5,743 people
Evaluation of Existing System
Existing and Design Flows Design Flow with West Glendive 1,100,000 gpd Design Flow without West Glendive 800,000 gpd
Evaluation of Existing System
The Collection System comprised of 22 miles of pipe, manholes, and 5 lift stations
The Wastewater Treatment Facility (WWTF) consists of a three-cell facultative lagoon system with discharge to Glendive Creek
Collection system installed between 1906 and 2007 - Mostly before 1930
Lagoons originally constructed in 1959-1960 Upgraded in 1976 and 1996
Evaluation of Existing System
Facultative Lagoon 3 cells (21.1, 24.1 & 25 acres) Aeration transfer structures Discharge to Glendive Creek No effluent disinfection
Evaluation of Existing System
Identified Deficiencies Existing Treatment can not meet some existing and
future permit limits Collection (Minor)
Gravity sewer lines have some O&M issues such as slow flow, root problems, and flat slopesflow, root problems, and flat slopes
Lift Stations (Minor) Backup power to two lift stations, SCADA system to tie all
together, possibly new pumps at Husky
Collection and lift stations are minor deficiencies compared to the treatment deficiencies
Alternative Screening Process
Irrigation Biological Nutrient Removal (BNR) Package
Mechanical Treatment Plant Sequencing Batch Reactor (SBR) Mechanical Sequencing Batch Reactor (SBR) Mechanical
Treatment Plant Lagoon/Moving Bed Biofilm Reactor (Lagoon/MBBR)
Storage & Irrigation
Storage & Irrigation Advantages & Disadvantages
Avoids ammonia toxicity & WET issues Avoids nutrient & TMDL issues Currently no discharge permit required Future regulatory permitting? Limited expansion capability Water rights (New Legislation) Large land area required
New SBR/BNR Site Location
Advantages & Disadvantages Change point of discharge to Yellowstone River Meets ammonia toxicity & WET permit limits Provides greatest treatment of all alternatives Pending nutrient & TMDL Can be upgradedCan be upgraded
Lagoon/MBBR Site Plan
Lagoon/MBBR Reactor Layout
Lagoon/MBBR Hybrid
Advantages & Disadvantages Change point of discharge to Yellowstone River Meets ammonia toxicity & WET permit limits Provides greater treatment than existing lagoons Pending nutrient & TMDL Easy to operateEasy to operate Can be upgraded into IFAS system to meet future
regulations but expensive
Preliminary Cost Estimates
Irrigation
Annual O&M Costs $231,700 $278,800 $275,100 $200,500
20-Year Salvage Value $413,000 $1,130,000 $853,000 $200,000
Present Worth of Salvage Value $128,800 $352,300 $266,000 $62,400
Present Worth of Annual O&M Cost $72,200 $86,900 $85,800 $62,500
Present Worth Cost1 $9,512,400 $8,570,600 $7,019,800 $6,007,100
1Present worth based upon a 20 year life cycle using calculated discount rate.
Criteria Used to Rank Alternatives
1. Technical Feasibility
2. Environmental Impacts
5. Operational and Maintenance
AlternativeAlternativeAlternativeAlternative
CostCostCostCost
and Safetyand Safetyand Safetyand Safety
Operation and Operation and Operation and Operation and
MaintenanceMaintenanceMaintenanceMaintenance Public OpinionPublic OpinionPublic OpinionPublic Opinion
TOTAL TOTAL TOTAL TOTAL
ScoreScoreScoreScore Wtd.Wtd.Wtd.Wtd. ScoreScoreScoreScore Wtd.Wtd.Wtd.Wtd. ScoreScoreScoreScore WtdWtdWtdWtd.... ScoreScoreScoreScore Wtd.Wtd.Wtd.Wtd. ScoreScoreScoreScore WtdWtdWtdWtd.... ScoreScoreScoreScore WtdWtdWtdWtd....
Storage & 6.0 48 8.0 40 2.1 21 6.0 36 7.0 70 0 215215215215
Storage &
Irrigation 6.0 48 8.0 40 2.1 21 6.0 36 7.0 70 0 215215215215
BNR Plant 8.0 64 7.0 35 4.0 40 7.0 42 6.0 60 0 241241241241
SBR Plant 8.0 64 7.0 35 5.7 57 7.0 42 5.0 50 0 248248248248
MBBR 4.0 32 5.0 25 7.9 79 5.0 30 6.0 60 0 226226226226
It is important to note that the above scoring and weighting are subjective. Alternatives that score overall within 10 pts of each other may
essentially hold the same degree of preference.
Selection of Preferred Alternative
Draft Preferred Alternative for WWTP Mechanical Treatment Plant BNR or SBR Technology
SUBJECT TO CHANGE BASED ON PUBLIC INPUTSUBJECT TO CHANGE BASED ON PUBLIC INPUT Estimated Cost of Draft Preferred Alternative = $8,570,600 Annual Estimated Cost for O&M = $278,800
Project Funding Strategy
Median Household Income (MHI) = $30,943
Department of Commerce Target Rate Threshold
Water Systems = 1.4% of MHI
Sewer Systems = 0.9% of MHI
Combined Rate = 2.3% of MHI
(Combined Rate Applies to Communities Which Have Bo th Systems)
City of Glendive Target Rate = ($30,943)(2.3%)
= $711.69/year $59.31/month
Combined Rate $45.18/month
City of Glendive Funding Options for BNR Wastewater Treatment Facility
ITEM
SCENARIO #1 SCENARIO #2 SCENARIO #3 TSEP, DNRC Grants w/o
City Reserves, w/ SRF Loan (3.75% / 20 yrs)
TSEP Grant w/o City Reserves & SRF Loan
(3.75% / 20 yrs)
No Grants w/o City Reserves & SRF Loan
(3.75% / 20 yrs) TOTAL PROJECT COST $8,893,000 $8,893,000 $8,893,000 TSEP Grant $500,000 $500,000 DNRC Grant $100,000 Town Reserves $0 $0 $0 TSEP Planning Grant $15,000 $15,000 $15,000 DNRC Planning Grant $5,000 $5,000 $5,000 SRF Loan (20 Years) $8,273,000 $8,373,000 $8,873,000SRF Loan (20 Years) $8,273,000 $8,373,000 $8,873,000
User Capital Cost/Month $18.33 $18.56 $19.66
Total Projected Annual O&M Costs $630,800 $630,800 $630,800
User O&M Cost/Month $14.49 $14.49 $14.49
Total Proposed Average Residential Sewer Cost/Month $32.82 $33.05 $34.15
Percent of Combined Target Rate 110.9% 111.3% 113.2%
Where to go from Here?
Public Comment on Draft PER
Final PER
Submit Grant Applications – April 2012 Submit Grant Applications – April 2012
Advertise and Bid Project – February 2014
Construction Project – April – November 2014
Comments
www.greatwesteng.comwww.greatwesteng.comwww.greatwesteng.comwww.greatwesteng.com
HELENA
Phone 406.449.8627 Fax 406.449.8631
Phone 406.587.0504 Fax 406.587.0541
Phone 406.652.5000 Fax 406.248.1363
Presented by:
Why Are We Here?
Wastewater System Preliminary Engineering Report
PUBLIC COMMENT
What is a Preliminary Engineering Report (PER) Problem Definition Describes existing system Evaluate Alternatives including Selection of a Preferred
Alternative Establishes Costs and Potential Funding ScenariosEstablishes Costs and Potential Funding Scenarios Implementation Schedule Required by Funding Agencies to qualify for Grants PUBLIC COMMENT
Problem Definition
Montana Pollutant Discharge Elimination System (MPDES) Permit Must have a MPDES permit to discharge wastewater The City of Glendive was issued a new MPDES Permit
in December 2007 Permit contains many new monitoring, reporting and Permit contains many new monitoring, reporting and
recording requirements Compliance schedule to meet future permit limits
Problem Definition
Wastewater Disinfection Currently no disinfection of discharged effluent
Exposed Biosolids Vector Attraction
2010 Population Glendive 4,935 people
Projected Population (2030) Glendive 5,000 people West Glendive 2,226 peopleWest Glendive 2,226 people Annexation Areas 743 people Total With West Glendive 7,969 people Total Without West Glendive 5,743 people
Evaluation of Existing System
Existing and Design Flows Design Flow with West Glendive 1,100,000 gpd Design Flow without West Glendive 800,000 gpd
Evaluation of Existing System
The Collection System comprised of 22 miles of pipe, manholes, and 5 lift stations
The Wastewater Treatment Facility (WWTF) consists of a three-cell facultative lagoon system with discharge to Glendive Creek
Collection system installed between 1906 and 2007 - Mostly before 1930
Lagoons originally constructed in 1959-1960 Upgraded in 1976 and 1996
Evaluation of Existing System
Facultative Lagoon 3 cells (21.1, 24.1 & 25 acres) Aeration transfer structures Discharge to Glendive Creek No effluent disinfection
Evaluation of Existing System
Identified Deficiencies Existing Treatment can not meet some existing and
future permit limits Collection (Minor)
Gravity sewer lines have some O&M issues such as slow flow, root problems, and flat slopesflow, root problems, and flat slopes
Lift Stations (Minor) Backup power to two lift stations, SCADA system to tie all
together, possibly new pumps at Husky
Collection and lift stations are minor deficiencies compared to the treatment deficiencies
Alternative Screening Process
Irrigation Biological Nutrient Removal (BNR) Package
Mechanical Treatment Plant Sequencing Batch Reactor (SBR) Mechanical Sequencing Batch Reactor (SBR) Mechanical
Treatment Plant Lagoon/Moving Bed Biofilm Reactor (Lagoon/MBBR)
Storage & Irrigation
Storage & Irrigation Advantages & Disadvantages
Avoids ammonia toxicity & WET issues Avoids nutrient & TMDL issues Currently no discharge permit required Future regulatory permitting? Limited expansion capability Water rights (New Legislation) Large land area required
New SBR/BNR Site Location
Advantages & Disadvantages Change point of discharge to Yellowstone River Meets ammonia toxicity & WET permit limits Provides greatest treatment of all alternatives Pending nutrient & TMDL Can be upgradedCan be upgraded
Lagoon/MBBR Site Plan
Lagoon/MBBR Reactor Layout
Lagoon/MBBR Hybrid
Advantages & Disadvantages Change point of discharge to Yellowstone River Meets ammonia toxicity & WET permit limits Provides greater treatment than existing lagoons Pending nutrient & TMDL Easy to operateEasy to operate Can be upgraded into IFAS system to meet future
regulations but expensive
Preliminary Cost Estimates
Irrigation
Annual O&M Costs $231,700 $278,800 $275,100 $200,500
20-Year Salvage Value $413,000 $1,130,000 $853,000 $200,000
Present Worth of Salvage Value $128,800 $352,300 $266,000 $62,400
Present Worth of Annual O&M Cost $72,200 $86,900 $85,800 $62,500
Present Worth Cost1 $9,512,400 $8,570,600 $7,019,800 $6,007,100
1Present worth based upon a 20 year life cycle using calculated discount rate.
Criteria Used to Rank Alternatives
1. Technical Feasibility
2. Environmental Impacts
5. Operational and Maintenance
AlternativeAlternativeAlternativeAlternative
CostCostCostCost
and Safetyand Safetyand Safetyand Safety
Operation and Operation and Operation and Operation and
MaintenanceMaintenanceMaintenanceMaintenance Public OpinionPublic OpinionPublic OpinionPublic Opinion
TOTAL TOTAL TOTAL TOTAL
ScoreScoreScoreScore Wtd.Wtd.Wtd.Wtd. ScoreScoreScoreScore Wtd.Wtd.Wtd.Wtd. ScoreScoreScoreScore WtdWtdWtdWtd.... ScoreScoreScoreScore Wtd.Wtd.Wtd.Wtd. ScoreScoreScoreScore WtdWtdWtdWtd.... ScoreScoreScoreScore WtdWtdWtdWtd....
Storage & 6.0 48 8.0 40 2.1 21 6.0 36 7.0 70 0 215215215215
Storage &
Irrigation 6.0 48 8.0 40 2.1 21 6.0 36 7.0 70 0 215215215215
BNR Plant 8.0 64 7.0 35 4.0 40 7.0 42 6.0 60 0 241241241241
SBR Plant 8.0 64 7.0 35 5.7 57 7.0 42 5.0 50 0 248248248248
MBBR 4.0 32 5.0 25 7.9 79 5.0 30 6.0 60 0 226226226226
It is important to note that the above scoring and weighting are subjective. Alternatives that score overall within 10 pts of each other may
essentially hold the same degree of preference.
Selection of Preferred Alternative
Draft Preferred Alternative for WWTP Mechanical Treatment Plant BNR or SBR Technology
SUBJECT TO CHANGE BASED ON PUBLIC INPUTSUBJECT TO CHANGE BASED ON PUBLIC INPUT Estimated Cost of Draft Preferred Alternative = $8,570,600 Annual Estimated Cost for O&M = $278,800
Project Funding Strategy
Median Household Income (MHI) = $30,943
Department of Commerce Target Rate Threshold
Water Systems = 1.4% of MHI
Sewer Systems = 0.9% of MHI
Combined Rate = 2.3% of MHI
(Combined Rate Applies to Communities Which Have Bo th Systems)
City of Glendive Target Rate = ($30,943)(2.3%)
= $711.69/year $59.31/month
Combined Rate $45.18/month
City of Glendive Funding Options for BNR Wastewater Treatment Facility
ITEM
SCENARIO #1 SCENARIO #2 SCENARIO #3 TSEP, DNRC Grants w/o
City Reserves, w/ SRF Loan (3.75% / 20 yrs)
TSEP Grant w/o City Reserves & SRF Loan
(3.75% / 20 yrs)
No Grants w/o City Reserves & SRF Loan
(3.75% / 20 yrs) TOTAL PROJECT COST $8,893,000 $8,893,000 $8,893,000 TSEP Grant $500,000 $500,000 DNRC Grant $100,000 Town Reserves $0 $0 $0 TSEP Planning Grant $15,000 $15,000 $15,000 DNRC Planning Grant $5,000 $5,000 $5,000 SRF Loan (20 Years) $8,273,000 $8,373,000 $8,873,000SRF Loan (20 Years) $8,273,000 $8,373,000 $8,873,000
User Capital Cost/Month $18.33 $18.56 $19.66
Total Projected Annual O&M Costs $630,800 $630,800 $630,800
User O&M Cost/Month $14.49 $14.49 $14.49
Total Proposed Average Residential Sewer Cost/Month $32.82 $33.05 $34.15
Percent of Combined Target Rate 110.9% 111.3% 113.2%
Where to go from Here?
Public Comment on Draft PER
Final PER
Submit Grant Applications – April 2012 Submit Grant Applications – April 2012
Advertise and Bid Project – February 2014
Construction Project – April – November 2014
Comments
www.greatwesteng.comwww.greatwesteng.comwww.greatwesteng.comwww.greatwesteng.com
HELENA
Phone 406.449.8627 Fax 406.449.8631
Phone 406.587.0504 Fax 406.587.0541
Phone 406.652.5000 Fax 406.248.1363
