Pittsfield’s Water Works

More on the history of the Pittsfield Water Works can be found on page 80 in Sanger Cook’s 1965 book Pittsfield on the Sebasticook and a 1989 Bangor Daily News story about the Pinnacle Water Tower demolition can be found on page 19 of Milestones and Memories.

Water. The Pittsfield Water Works began operation in 1891, with three dug wells drawing water from the sand and gravel aquifer along Hartland Avenue. These wells served the water system for over 80 years, until they were contaminated by the Town’s salt/sand pile in 1974. Two new wells were then drilled on the east side of Peltoma Avenue, which ran dry in 1975 and 1978. In 1984, a new well was drilled with excellent yield on the west side of Peltoma Avenue. However, by 1987, the State ordered it closed due to high manganese concentrations and the Town had to resort to its prior wells, hoping for wet summers. This was not the case in 1992, when there was a serious drought (well documented in a study written by Emery and Garrett Groundwater), requiring extensive conservation measures and pumped recharge of the well. Since 1992, the Town has been fortunate and had enough water through the dry seasons. It is hoped that the newest well drilled in 1996, just across the Sebasticook River in Burnham, will provide a high quality, plentiful water supply for several decades. Sixty-four percent of the well’s recharge will come from the Sebasticook River, after it has been filtered through 600 feet of sand and gravel. The new well does not require a filtration plant; the water will be treated with hypochlorite and fluoride. The Town’s drinking water will also be aerated to lower the pH, in order to reduce potential corrosion on older system pipes made of lead and copper.This new well is ten feet deeper than the existing Well #1, and is rated to yield 505 gallons per minute and 750,000 gallons per day. This amount by far exceeds the Town’s peak usage, even during drought conditions. The Town’s two standpipes are filled over the weekend, when electricity costs are lowest, with the storage used to supplement nightly pumping during the week. Of the Town’s average 455,000 gallon/day usage, 330,000 gallons are pumped into the standpipe each night, while the rest is provided by the standpipe reserve established over the weekend. The 50-foot high Phillips Corner tank is filled to 48.5 feet on Sunday and by the end of the week the water will have dropped to the 35-foot level. The move to this off-peak pumping approach has reduced annual operating costs by $12,000 in electricity alone.

Water Tank on Park’s Pinnacle Peak, 1962. Water Tank in 1972 as seen from Waverly Ave.

Like the sewer system, the water works has been run as a self-funded Town department. The option of creating a separate water district has been discussed in the past but rejected, as the current system is working well for both ratepayers and taxpayers.

The water system is more complex than the sewer system, needing to maintain sufficient hydraulic pressure with minimal pumping cost throughout the service area. Fortunately, similar to the sewage treatment system, the Town is utilizing the least-cost groundwater source option, which minimizes treatment requirements under the Safe Drinking Water Act. Also like the sewer system, water mains are of varying sizes, materials and condition, linked closely to age. The Town has inventoried its system in detail, and this data has been translated to GIS format for querying ability. This makes system analysis much more readily accomplished. In addition, a number of studies have been conducted over the years. The Town is currently completing recommended improvements as identified by A.E. Hodsdon Engineers in 1992.

By far the most significant (and expensive) project was construction of a new water source and related investments, including purchase of a 35-acre parcel for wellhead protection, installation of a pump station and extension of the water main 1.2 miles. Another major system improvement being put into place in 1997-98 is the replacement of the 40-foot high 100,000 gallon Grove Hill standpipe with a 100-foot high, 500,000 gallon tank. This tank will be coupled with a booster pump located at the base of Grove Hill. Together these investments will guarantee adequate pressure to the hospital area which has not had sufficient water pressure to meet State regulations. The hospital and nursing homes, in order to meet insurance requirements, have had to install private booster pumps to make up for the Town system’s pressure inadequacy.

These improvements, costing $1.5 million, are being paid for by a $600,000 grant and $900,000 loan being financed over a 30-year period at 5% interest, both obtained from the U.S. Department of Agriculture’s Office of Rural Development. Some of the standpipe painting reserve is also being allocated toward replacement of the existing tank.

Sewer System.

Pittsfield’s sewer system was begun in the 1890’s, with the original system map prepared in 1895. The 1970 Comprehensive Plan utilized this information as a base map and updated it, providing a very useful sewerage map with estimated main size. At that time, the Town’s raw sewage was still entering the river directly and correcting this problem was the priority objective. The 1970 Plan included a recommended sewer improvement plan with two major interceptors designed to collect waste from each side of the river south to the railroad tracks, then from either side of a diagonal border crossing South Main Street just south of Peltoma Avenue. These interceptors would transport sanitary waste to two facultative treatment lagoons located at the end of McCarty Road. These recommendations were accomplished in 1978 and the bonds financing the project will be paid off by sewer users in the year 2005.

The majority of the current urban area is served by public sewer. A recent extension made possible with the support of Community Development Block Grant funds along outer North Main Street has opened that area up for more compact residential development.

The two 35-acre lagoons treat the effluent naturally, by aerobic bacterial action, so that by the time water reaches the outflow at the end of the second lagoon, it is clean enough to discharge into the adjoining peat of Big Meadow Bog, and secondarily into the Sebasticook River approximately 1000 feet away. There is a final effluent chamber at the outflow at which samples are taken. The chamber is set up to add chlorine prior to discharge if bacteria levels warrant it; this has been virtually unnecessary during the life of the system. This treatment system is the most cost-effective type available, with no mechanical operations and virtually no maintenance.

The system is sized and licensed to handle an average of 1.5 million gallons of wastewater per day. The current actual usage averages 600,000 gallons per day, so there is considerable room for growth. Up to 2500 gallons per day of septage waste may be added to the lagoons; this is more than sufficient to handle Pittsfield’s septic system biosolids, making a land-spreading site unnecessary.

Another priority of the 1970 Plan and continuing to this day in Pittsfield and elsewhere is the separation of storm water drainage from the sanitary sewer system. The Town’s maximum sewage flows occur during and following storm events, indicating that there is a substantial amount of storm water entering the treatment system. Sources include residential and commercial roof and cellar drains, municipal and private catch basins, and infiltration through cracks in sewer pipes.

The Town has just completed a major separation and diversion project which will remove sanitary overflows during storm events from the East Farnham Brook watershed. The Town has hired the engineering work to design the project and is planning to implementation construction in two phases. A Sewer Department reserve fund has been established, which will begin saving for the sanitary system portion of the reconstruction, targeted to occur in 2001. This scheduling allows for necessary borrowing by sewer users to dovetail in both amount and timing with the retirement of the 1978 construction bond, holding sewer rates level. The storm water diversion portion of the project is being done in 1997-98, with the Town borrowing $375,000 over 10 years at a 3.7% interest rate from a fund established through the Maine Department of Environmental Protection (DEP) and managed by the Maine Municipal Bond Bank. Due to its magnitude, this project is being financed separately from the regular capital budget.

Original version 8-Jan-07.