FISHERIES, GAME AND FORESTS. 403 



LOGWAYS. 



Inasmuch as there is a large amount of valuable spruce timber still standing in the 

 forests adjacent to Indian Lake and its tributaries, it became necessary to provide a 

 logway for floating out the logs each spring. The main logway is fifteen feet in width, 

 with the bottom ten feet below the spillway level, and is situated just west of the gate 

 house. Heavy buttresses on each side carry the pressure of the water against the 

 logway when closed, as well as form a gangway for the logs after passing the opening. 

 The logway is controlled by means of forty-five 4 x 8-inch spruce timbers or "needles" 

 about twenty feet long, placed edgewise to the water in the reservoir. The needles 

 are operated by a block and fall. suspended from a gallows-frame above the needle- 

 frame. For the purpose of floating out old snags or logs when the water is at or 

 above the level of the spillway, a subsidiary logway, with the bottom eighteen inches 

 below the spillway level and controlled by three 6 x 12-inch timbers, has been 

 provided at the east end of the spillway. 



SPILLWAY. 



The spillway is located at the west end of the dam and is spanned by a foot 

 bridge resting on five masonry piers. The effective spill is 106^ feet long, and with 

 the water up to the bottom of the floor stringers, about six feet in depth would allow a 

 discharge of 5,000 cubic feet per second. With the large temporary storage of the 

 reservoir it is not considered, however, that a discharge approximating 5,000 cubic 

 feet per second will ever take place. The spillway is seven feet wide in section with a 

 downward slope of eighteen inches toward the back or upstream face. The top is 

 coped with large selected stones firmly doweled to the masonry. 



EMBANKMENT. 



The embankment at the east end of the dam is fifteen feet wide on top, with a 

 rip-rapped slope of two and one-half to one on the upper or water slope and two to 

 one on the lower slope. A rubble masonry core wall extends through the center of 

 the embankment and into the hardpan from eight to twenty feet. The trench 

 for the core wall was made four feet wide, with vertical sides, and then filled 

 solid with rubble masonry. From the surface of the ground the wall batters to two 

 feet wide at the top. The embankment was deposited in twelve-inch layers, sprinkled, 

 and thoroughly rolled with a two-ton roller. As no clay was to be found in the 

 vicinity, some of the hardpan was deposited next to the core wall on the water side 

 and thoroughly compacted by cutting and cross-cutting with spades. The object of 



