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

Lagoon Systems In Maine 

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.
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Norway Maine

Norway, Maine Wastewater Lagoon System

   The lagoon system in Norway Maine was originally designed in 1964. The plant came on line in 1965 and consisted of two, 7 foot deep, lagoons of about 7 acres each. The primary lagoon was provided with a course bubble tubing aeration system run from a blower house. A contact chamber, gas chlorination, and a comminutor system were also installed. The inner lagoon embankments were paved with asphalt .

   In 1982 a grit chamber with aeration separation and a manual bar rack were installed.

   In 1987 the DEP performed a load allocation study on the Little Androscoggin River which resulted in a requirement to hold all discharge to the river from June 16th through September 1st of each year.

   In 1990 the plant was upgraded to allow for seasonal discharge. The plant site did not allow for the construction of additional lagoons, so storage was created by building the lagoons vertically. As completed the lagoons are 20 feet deep and aeration is provided using surface aerators. The Primary lagoon is 300 feet wide and 1000 feet long, with 6 aeration units set up in a counter clockwise racetrack pattern. They are mounted to allow operation during changes of 10 feet in lagoon operating levels. This has resulted in a what might best be termed a single wall oxidation ditch with a velocity of .5 fps from the surface to the lagoon floor. The center of the lagoon is still and has an anaerobic zone on the bottom during significant periods of the year.

   Sludge production which has been less than expected is located in this center part of the primary lagoon.

   The secondary lagoon is provided with 2 aeration units positioned to affect the discharge end of the lagoon.

   New chlorination and de-chlorination equipment along with new flow monitoring equipment was also installed during the upgrade construction.

   An upgrade of the headworks is to be completed in 2000 and will include a mechanical stepscreen, rampress, and new grit chamber aeration system.


Lagoon Specifications

Norway Maine

Lagoons No.1 No. 2
Volume 26 MG 26 MG
Lagoon Dimensions 300' x 1000' 800' x 800' x 600' (Triangular)
Lagoon Acreage 6.88 acres approx. 6 acres
Aeration Surface Aspirating Surface Aspirating
Number of Aerators 6 0

Lagoon acreage is approx. 13 acres or 561,053 square feet. Aerators (Aire-O2's) in first lagoon create a counterclockwise rotation with a velocity of . 5 fps all the way to the bottom of the lagoon. The center of the lagoon is quiet with an anaerobic zone at the bottom. The liquid operating depths of the lagoons ranges between 10 to 20 feet.


System Information

Norway Maine

Design Flow 0.975 MGD
Actual Flow 0.489 MGD
Discharge To Little Androscoggin River
Year Built 1964 Upgraded 1990
Design Engineers Original: Wright Pierce Barnes and Wyman
Upgrade - Woodard and Curran
Septage Received No
Collector System 19 miles gravity sewer, 290 manholes, 8 pump stations
Staff Size 3 Full Time
Number of Users 1,000 Services
Billing Software Trio
Comments Plant operates in hold and release mode. Facility utilizes a USEMCO mini mainline camera for collection system maintenance.


Norway Maine

Facility Operator Shawn Brown
Facility Address 26 Danforth St.
  Norway, Maine 04268
Telephone (207) 743 - 5304
Fax (207) 743 - 5306


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Norway Maine

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