FIELD: construction.SUBSTANCE: hydraulic structure comprises installed in the aquifer 1 the reservoir 2 with the bottom filter 3 having the filling 4, and the water level determinant 5. The working reservoir 6 is additionally divided into the water intake chamber 7 and the float chamber 8. The second working reservoir 6 is separated from the first reservoir 2 by the perforated partition wall 9 with the bottom threshold 10. The working reservoir 6 comprises the vertical housing 11 fixed to the reservoir lid, in the housing of which the float pump 12 of the water intake chamber 7 is placed. The float pump 12 has the limiter 13 in the form of guides fixed in the lower part of the housing 11, and the limiter 14 is fixed in the middle part of its intake. The water intake chamber 7 is separated from the float chamber 8 of the reservoir 6 by the cantilever wall 15. The float chamber 8 is equipped with a means in the form of the sewer pipe 16 fixed in the structure slope 17, and is provided with the tubular insert 18
