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The expansion of the water-supply system for Wiesbaden, Germany, duringthe period 1921-24 is described. Water is pumped from the Rhine, passedthrough sedimentation basins and then into infiltration basins. The rechargedwater is then pumped by a row of wells inland from and paralleling theriver and the recharge basins. The geology and hydrology of the area aredescribed together with details of the waterworks installation.Burdick, C. B. See also Meinzer, O. E., 1942.1924. Infiltration galleries at the Des Moines, Iowa, water works: NewEngland Water Works Assoc. Jour., v. 38, no. 3, p. 203-218.The water supply for Des Moines, Iowa, is obtained from a 2-mile horizontalcollecting gallery located in porous strata paralleling the RaccoonRiver. In order to increase the supply to the gallery during dry years waterhas been pumped from the river and spread on the land above and more than100 feet from the gallery. Gallery water levels can be brought up to anydesired level by controlling the amount spread upon the land. The floodingproduced no noticeable change in water quality. The soil beneath the spreadingarea is sandy and interspersed with pockets of gumbo. During 1922water was applied to a land area of 13 acres continuously for 4 months at, an average rate of 1.18 feet per day.1946. Des Moines infiltration system was developed methodically: WaterWorks Eng., v. 99, no. 9, p. 461-463, 534, 536.The use of a collecting gallery and water-flooding basins for water supplyfrom groundwater at Des Moines, Iowa, is described. Infiltration rates fromthe river bed equal about 0.67 foot per day under low-flow conditions. Theflooding basins are given no special preparation. The water passes downwardthrough 5 to 15 feet of clay silt into the underlying gravel stratum fromwhence it passes to the gallery. Recharge rates vary widely but approximate1.5 feet per day. Beds are cleaned at intervals of one to three years byBIBLIOGRAPHY 17scraping off an inch or so of material with a bulldozer and adding it to theside embankments.During winter, operations continue normally and water is recharged beneaththe ice. Frozen ground is thawed by application of river water. Floodingbasins are located 20 to 100 feet from the gallery to ensure sanitary safety.No differences in water quality have been observed between river-bed infiltrationand land flooding.Burgess, P.1911. Some features of the design of infiltration systems: Eng. Rec., v. 63, no. 5,p. 136-137.

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