T}]c Plankton Algae of the Palisades Interstate Park 97 



Description of the Lakes. The fullowing list comprises the 

 lakes investigated, with all available data on size, depth, and origin. 

 The names of the lakes within the Park boundaries are the official 

 names recognized by the Park authorities, while the names of lakes 

 outside of the Park are those that appear on the West Point, Stony 

 Point, Ramapo, and Schunemunk quadrangles of the United States 

 Topographical Survey; these names are, in one or two instances, at 

 variance with local tisage. 



1. Barnes Lake: A small, very shallow, artificial lake made by 

 a damming of the stream running from Lower Twin Lake. It is not 

 more than five years old. 



2. Cedar Lake: In the middle of the Park, and formed by a con- 

 crete dam miade a few years ago. Previous to the building of the 

 dam there were two small natural lakes, which are shown on the 

 Stony Point sheet of the United States Topographical Survey map 

 as Cedar Pond and Little Cedar Pond. The water of the enlarged 

 Cedar Lake has a maximum depth of 35 feet. It is the source of 

 the municipal water supply for the town of Haverstraw. 



3. Cranberry Lake: An old artificial lake on the Harriman estate, 

 north of the Park, built to furnish power for the Clove iron mine 

 in 1857 or 1858. Mr. R. D. A. Parrott, a former owner of the 

 property, states that there was no natural pond in the basin at the 

 time that the dam was built. This lake has a length of .64 miles 

 and a breadth of .15 miles. It is comparatively shallow, with a 

 maximum depth of sixteen feet and an average depth of twelve feet. 



4. Cromwell Lake: Called Hazzard's Pond on all old maps, this 

 lake is located in the western part of Woodbury township and has a 

 length of .50 and a maximum breadth of .25 miles. The total area 

 is approximately 42 acres, the greatest depth 45 feet, and the average 

 depth 20 feet. The lake is a natural one, although a dam built 

 between 1740 and 1745 raised the water three feet. At the time 

 collections were made the water was quite turbid as a result of heavy 

 algal growths. Such growths are by no means uncommon during 

 the summer months. 



5. Echo Lake: Another old artificial lake, lying on the Harriman 

 estate, was built to furnish power for the Greenwood iron furnace. 

 Mr. Parrott informs me that the furnace was rebuilt in 1813, but 

 he does not know when the furnace was first built. The lake bottom 

 is badly silted up and the lake is very shallow, having a maximum 

 depth of eight and an average depth of six feet. Its length is .28 

 miles, and its breadth a tenth of a mile. 



6. Forest Lake: This lake is shown on the Sterling map of 1779 

 and on several more recent maps. It is called Slaughter's Pond on 

 all of these maps. A dam, which raised the water-level twelve feet 

 was built across the outlet in T856, and in 1916 another addition to 



• the dam increased the depth of the water three feet. The lake has 

 been carefullv sounded by the caretaker who reports a maximum 

 depth of 58 feet. The greatest depth that I have found is 56 feet. 

 The lake is three quarters of a mile long and of irregular shape. 



