Aerial view of the Warren, Maine lagoon system. Photo courtesy of Woodard and Curran.

Lagoon Systems In Maine 

Lagoon
Systems In Maine
 



An Informational Resource for
Operators of Lagoon Systems

Mars Hill Wastewater Lagoon System - Mars Hill  Maine. Photo Courtesy of Wright-Pierce Engineers.
 Mission  |  Search  |  Acknowledgements  | Discussion Group |  Contact Us  | Links


Design & Operation
Lagoon Aeration
Tech Papers
Operation Articles
Lagoons In Maine
The Laboratory
Maine Lagoon News
Lagoon Biology
Resources
Biosolids


2003 Maine Wastewater Salary Survey as conducted by the Maine Wastewater Control Association


2003 Maine Wastewater Rate Survey conducted by the Maine Rural Water Association


Maine DEP Monthly
O & M Newsletter

Maine and WEF's
Operation Forum

Penobscot Watershed and Development of a TMDL 


EPA Binational Toxics
Strategy

Maine Rural Water
Association



Maine Wastewater
Operator Certification
Guide



Maine Is Technology
Newsletter

Maine Wastewater Control Association

Maine WasteWater Control Association

Maine
Wastewater Engineering
Firms

 

 

Mapleton Wastewater Treatment Facility
Mapleton, Maine

Mapleton Sewer District Background


The Mapleton Sewer District
was formed in 1965 and operates about 12,000 linear feet of collector sewers. The District serves 280 customers which represents about 700 people. The original facility was constructed as an activated sludge plant in 1973. Effluent discharge was to the North Branch of the Presque Isle Stream.

In 1993 the Maine Department of Environmental Protection notified the Mapleton Sewer District it needed to address the following issues:


 

  • Excess Sewer System Infiltration and Inflow to reduce peak flows

  • Deteriorated condition of treatment plant and a lack of unit process redundancy that had contributed to effluent violations.

  • Remove outfall from stream due to effluent violations in stream and due to the use of the Presque Isle Stream as a public water supply for Presque Isle.

The District worked with regulatory and funding agencies from 1993 to 2001 to define a cost effective solution and to assemble a funding package for a new treatment facility.

 

There were three facility planning studies conducted between 1993 and 1997. Thirty three different collection, treatment, and discharge options were evaluated. Of those options the District was asked to consider only seasonal discharge options or non-discharging options. The District was also asked to consider options with a $3,000,000 target budget. Another requirement was that the District only consider those options that could process seasonal infiltration and inflow to avoid $1,000,000 in sewer remediation costs.

In 1997 the facilities plan update focused on 2 final options:

  • Upgrade existing treatment plant with seasonal storage lagoon for $3,100,000

  • Construct new facultative lagoon with non-discharging land application effluent disposal using summer spray irrigation and winter snow storage for $4,200,000.

The final consensus was to invest in the more costly non-discharging lagoon option in order to permanently eliminate stream discharge.

 

Project's Funding Package

The funding package was assembled between 1997 and 2001. The final project cost in 2001 dollars was $4,600,000. The 40-year Rural Development Loan was recently refinanced with the Maine Municipal Bond Bank for 20 years with a $40,000 savings in interest costs. The final cost to Mapleton Sewer District customers was increase of $75.00 per year for the completely new facility.

Project Funding Sources

DEP Grant

$2,200,000

CDBG Grants (3)

$1,100,000

Rural Development Grant

$1,150,000

Rural Development Loan

$150,000

   

Total

$4,600,000

Construction began in 2002 and was completed in 2004.

 

Basis of Design for New Facility

Average Daily Flow

70,000 GPD

Normal Peak Hourly Flow

160,000 GPD

Spring Peak Hourly Flow

380,000 GPD

Peak Wet Weather Hourly Flow

650,000 GPD

Biochemical Oxygen Demand

100 LBS / Day

Total Suspended Solids

100 LBS / Day

 

Benefits of the Lagoon Facility

The benefits of the Mapleton Wastewater Treatment Facility included excellent effluent quality obtained in the facultative lagoon. By using the land application process the facility met its goal of becoming a non discharging facility. The use of snowmaking with the spray irrigation process allowed year round operations with smaller storage lagoon facility.

 


Lagoon Specifications

Lagoons Treatment Lagoon Storage Lagoon
Type Biological Facultative Passive Storage Lagoon
Construction Earthen Clay Lined 60 mil HDPE Synthetic Liner
Surface Area 3.5 Acres 4.5 Acres
Depth - Total 11 feet 10 feet
       Treatment Zone 6 Feet N/A
       Sludge Zone 2 Feet N/A
       Free Board 3 Feet 3 Feet
Volume 5.0 MG 14.5 MG
Lagoon Dimensions (Top) 600' x 250' 620' x 230'
Aeration None None

 

Comments: Side slopes on both lagoons are 3 /1 with 12" wide top berm.

 

 

System Information

anson maine

Design Flow 0.070 MGD
Actual Flow 4.0 MGD
Discharge To Land Application
Year Built 1973 as Activated Sludge Upgrade in 2004 as Lagoon System
Design Engineers Upgrade - Olver Associates
Septage Received No
Collector System 15 miles gravity sewer, 5 pump stations
Staff Size 1 Full Time
Number of Users 270 services
Billing Software  
Comments  



Back to Lagoons in Maine

 

 

aerated lagoons

  Copyright 2003 |  Home | Site Map                                          

Search  |  Contact Us  | Links