504 BULLETIN OF THE BUREAU OF FISHERIES. 



Errol Dam, located 5 miles below the outlet, controls the storage of Umbagog Lake 

 and is about 2)% miles below the mouth of the Magalloway River, thus making the latter 

 stream one of the feeders of Umbagog Lake. 



The Androscoggin River from the lake to the mouth of the Magalloway is a winding 

 channel between two naturally formed dikelike embankments, with here and there 

 opeiungs into the lagoons beyond. Beyond the Magalloway's mouth the banks are low 

 but wooded, without much swampy ground except at the mouths of brooks and narrow 

 strips of lagoonlike areas by the river and margin, probably formed by slight changes 

 in its course or conditions. The channel has a depth ranging from 12 to 37 feet. The 

 bottom is mainly muddy. The immediate margin bears a profuse growth of water 

 plants, and patches of yellow water lilies are everywhere of frequent occurrence. 



The dam is a wooden structure completely housed over and 175 feet long between 

 abutments. The entire flow passes through various gates of different sizes. There is 

 no provision for overflow besides the gates. 



Below the dam there is a decided decline, occasionally an almost torrential rapid, 

 when the water is on. Immediately below the dam, especially on the right side of the 

 river, the shore is an almost precipitous rocky cliff', at the foot of which is a deep pool 

 formed by an eddy. The quick water ends in a broad expanse of smooth water at 

 Errol below the bridge. Here, from the right, enters a considerable tributary known 

 as Clear Stream. Thence for about 3 miles to Molnichwock Falls the current is strong 

 but smooth. 



The next principal tributary of the Androscoggin below the lake, and the only other 

 one with which this report is concerned, enters the Androscoggin from the left just 

 above Molnichwock Falls. This is Molnichwock Brook, which at the river end is a 

 narrow dead-water area, perhaps one-half mile long, bordered by an extensive shrub- 

 grown bog or marsh. In high stages of water the stream may be navigated by canoe 

 for 4 or 5 miles before it becomes obstructed by overgrowing and ingrowing alders and 

 other bushes. The stream rises in Molnichwock Pond in Maine, about 9 miles in a 

 direct line from its mouth. 



Molnichwock Pond is irregularly cycloid in shape and of an estimated area of about 

 20 acres. It is situated among the wooded hills of Upton. The immediate shores in 

 most places consist of a narrow border of bog with the shrubs characteristic of such 

 places. Around the shore margin is a zone of yellow pond lilies and other aquatic 

 plants. The bottom is mostly of soft mud. The depth at the outer edge of the lily 

 growth was about 6 feet. A line of soundings through the middle, west to east, at 

 approximately equal intervals, gave 7, j^A, 8, 9, 9, 9, and 9 feet, shoaling gradually on 

 the west and northwest sides; 7 feet of water was found nearer shore on the east and 

 southeast sides. The deepest water was 8 and 10 feet on the east and southeast sides 

 about 50 feet from shore and about 40 yards from shore on the west side. There is a 

 large shoal at the outlet at the east side of the pond. 



The outlet of the pond is a very small rocky brook, which condition obtains for an 

 unknown distance. In its course, perhaps 6 or 7 miles from the mouth of the stream, 

 are two meadows, the smaller not far above the larger and the two separated by wood- 

 land and alder growth. The lower meadow is grass grown, with here and there clumps of 

 alders and other bushes and trees, especially on the margin of the brook. Through this 

 meadow, which is perhaps i mile long in a direct line, the brook, with many shoal reaches 



