Читать книгу The Ice Crop: How to Harvest, Store, Ship and Use Ice онлайн

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Where Dams are Built across streams and the water line is raised on property beyond the limits of that held by the owner of the dam, consent must be obtained from the holders of property thus affected.

There are numerous creeks and brooks which are fed by springs, or have their source in spring lakes, which make excellent ice fields, with very little labor or expense. Advantage may be taken of low lands in the vicinity of such streams. Gravel forms the best bed for ice ponds, as it is free from weeds. In some of our lakes, occurring in districts abounding in gravel, the water is pure and sweet and the gravelly bed can be seen at great depths. Springs are usually numerous in such localities.

The following methods of preparing dams can be employed in some situations. The depth of the pond and the force of the current of the stream are to be taken into account in fixing upon the proportions and construction of dams. Also the quantity of water usually running into the pond and the largest amount likely to be received during a season of flood. If the soil is a light loam, or a seam of gravel is near the surface, dig a trench down to a hard bottom, and on the pond side drive in a row of stout boards, breaking joints and sloping them toward the dam. Behind this paling fill in with clay rammed down. A crib formed of logs notched and bolted together, and lined or faced with plank on pond side, should be set at the rear of the sub-paling. This crib is filled with stones and clay or sand. The front is banked up with earth and covered with rip-rap.