Show PROPER BUILDING OF F CHECK DAMS WHERE NEEDED to get the best results from check dams in gullies tops of 0 dams should bo be low enough in the middle and high elou enough h at the ends to carry the water after heavy rains without overflowing gully banks or washing soil around ends of dams say engineers of the united states department of agriculture it if dams are too high the carrying capacities of gullies are reduced and water oNer overflows flows their banks and washes around the ends of the dams tind and can form new gullies down the slopes elopes parallel to the old ones where dams are wat watertight ertl lit the ends should extend far enough into the gully banks to prevent water seeping around the dams and washing away the sides of 0 gullies foundations of 0 dams should extend far enough below the bottoms of the gullies so that hydraulic pressure will not force the water under the dams to undermine and destroy them the floors of gullies should be paved at the lower sides of the tha dams for sufficient length and width to prevent any erosion or undermining in of the dams by water dropping over the crests dams are built in gullies to cause causa their flold ailing sediment carried by runoff water and to check soil erosion when gullies in cultivated fields are filled farmers save much time and labor in cultivating and harvesting crops filled gullies in it pasture posture lands eliminate danger of accidents to grazing animals temporary dams usually are made of materials found on farms such ns as stakes brush straw logs and loose rock woven wire Is also used most host temporary dams are porous when first built but the spaces gradually fill with trash and soil brought down by the water permanent dams are built of earth masonry and concrete the bureau of agricultural engineering at washington can supply suggestions dons for constructing dams to in gullies gT illies |