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85 percent better health cents a cubic city dweller clog compared to straight-row Construction Sites Contour farming controlled cost cover Cropland cubic yard cultivated land damage by sediment dams disturbance downstream drainage dredged drop structures duce electricity erode their banks erosion and sedimentation farmer farmland Flood plains Flood-prevention reservoirs floodwater game fish grass greatly reduce gullies harbors help prevent housing developments lakes land use planning loads of sediment meander microscopic plants millions of dollars muddy water Mulch Navigation Channels pasture plowed promote better recreation protected Rain reduce soil loss Reservoirs and Ponds rivers road cut roads and railroads ROADSIDE DITCHES row crops scoured sedi sediment affects Sediment and debris Sediment damage Sediment fills Shrubs silt sloping soil conservation measures Soil Conservation Service Soil erosion source of sediment spawning Stabilize Stream Channels storage capacity straight-row farming stripcropping technical assistance Terracing trees unprotected vegetation water bills Water-supply reservoirs Watershed woodland