Sweet Auburn: The Magazine of the Friends of Mount Auburn Mount Auburn: Pathways of Connections | Page 5

Planning and Sustainability: Connecting Resources By Candace Currie, Director of Planning & Sustainability “The water courses in Mount Auburn consisted, originally, of a series of small ponds, apparently stagnant, but com- municating with each other by filtration through the sand or gravel.” —Jacob Bigelow, 1861 1 In 1861, Jacob Bigelow was talking about an aquifer (an underground layer of permeable glacial deposits). The term “aquifer” wasn’t coined until circa 1900, but Mount Auburn was then, and continues to be today, part of a landmass bridge over a section of an aquifer that extends from north of Fresh Pond in Cambridge beneath Mount Auburn to the Charles River to North Brighton and beyond. 2 Today, Mount Auburn taps into the aquifer from April to November for its irrigation needs with a 53’ well near the north basin of Auburn Lake. In total, only about 25% of the landscape is irrigated while the remaining 75% is dependent upon Mother Nature. These comparative images of an 1831 map prepared by Alexander Wadsworth (see portrait on page 13) with the water bodies emphasized in light blue and a current map of the Cemetery with today’s highlighted water bodies demonstrates the magnitude of surficial water changes made in the landscape since Mount Auburn was founded. These water bodies are now closely regulated by the Watertown Conservation Commission, but in the 1800s changes to the landscape reducing the amount of seem- ingly stagnant water where mosquitoes bred, allowing for the creation of additional cemetery lots, were not regulated at all. Today Mount Auburn improves all habitats by enhancing the natural landscape around ponds and the vernal pool at Consecration Dell, creating lush gardens like the Wildflower Meadow around Washington Tower, and maintaining healthy water quality with enough oxygen to support fish in the ponds - especially during times of drought. Since Mount Auburn was established not only as a rural cemetery but as a horticultural institution, watering plants, supplying water to the ponds, and dealing with droughts have been constant issues. Consultants have advised Mount Auburn on water issues and use ever since 1860. Most recently in 2002, Emery Garrett Groundwater, Inc. (EGGI) submitted a Water Conservation and Drought Management Plan to the state Department of Environmental Protection (DEP) regarding Mount Auburn’s use of water from the aquifer. The aquifer doesn’t belong to Mount Auburn; it is a state resource. Mount Auburn borrows from it, and repays its debt almost 12 times over. In fact, EGGI calculated aquifer recharge of approximately 92 million gallons per year based on the permeable surface throughout the 178 acres. Based on Mount Auburn’s actual yearly metered reports, less than 8.3 million gallons per year over each of the last seven years has been used. The DEP no longer requires Mount Auburn hold a permit for using water from the aquifer because of this prudent use. Additionally, Mount Auburn has been capturing water that falls on the impermeable surfaces. This collected water is used at outside gardens. Inside the greenhouses, municipal water (supplied by the Massachusetts Water Resources Au- thority) that travels all the way from the Quabbin Reservoir is used for irrigating the floral crops. Unfortunately, Mount Auburn’s well water pumped from the aquifer is not available in the winter when it is most needed in the greenhouse due to the freezing temperatures that would cause breaks in the more than 100-year-old, underground water system. Comparable views of the Cemetery then (Wadsworth’s 1831 view showing original acreage) and now (the current map of the Cemetery including Willow Pond in the southern half) demon- strate the changes to Mount Auburn’s landscape over the past 180 years. Mount Auburn’s future use of this very precious resource will become much more sustainable. To ensure that potable water is not used for irrigation, our plans for new greenhouses will include a 30,000 gallon, below-ground cistern for storing rainwater collected from the roofs. Not only is rain- water better for the plants, but this change ensures potable water is used for its intended purpose—drinking. Mount Auburn is making a bolder commitment to all sustainable practices, but our prudent use of water is imperative. Whether we enjoy the serenity of Halcyon Lake, the soothing sound of the falling water at Birch Gardens, or a refreshing drink from the tap, Mount Auburn continues to share water—just one of its precious resources—with the larger community. Because we have this lush landscape and its many resources, the public can use it for their edification and enjoyment. As an educational tool, natural refuge, and wildlife sanctuary, one of our main priorities is to connect today’s children to the natural world through vital experiences that will hopefully last a lifetime. Spring/Summer 2011 | 3