10 



MASS. EXPERIMENT STATION BULLETIN 332 



Figure 3. 



CRANBERRY BOG PUMPING PLANTS 



Bogs generally are flooded either by pumping or by gravity flow from a 

 pond, stream, or reservoir, but those with winter flowage only are often flood- 

 ed by the accumulation of the water from rains and melting snows. When 

 pumps are used for flooding, the water usually is pumped on the bog and 

 drained off by gravity, but in some cases this is reversed. Some bogs are 

 flooded repeatedly with the same water saved by pumping back into a reservoir. 



The survey included a total of 398 pumping plants. Of these, 84 had electric 

 motors and the rest were operated by gasoline engines. The horsepower of 

 the electric motors ranged from 6 to 100, with a total of 2,707 and an average 

 of 32.2; of the gasoline engines, from 3 to 271, with a total of 9,312 and an 

 average of 29.7. Table 5 gives a number of facts about the installations. 



