UNITED STATES DEPARTMENT OF AGRICULTURE 
DEPARTMENT BULLETIN No. 1408 
Washington, D. C. 
June, 1926 
STRUCTURES USED IN DRAINING 
AGRICULTURAL LAND 
By 
L.T.JESSUP, Associate Drainage Engineer 
Bureau of Public Roads 
CONTENTS 
Page 
Introduction 1 
Structures for Use with Underdrains .... 2 
Manholes 2 
Surface-Water Inlets 4 
Lampholes 6 
Cradles 7 
Angle Boxes 7 
Lateral Connections ......... 8 
Outlets 8 
Crossings Under Railroads and Canals . . 9 
Lumber Box Drains 10 
Structures for Open Ditches 11 
Drops and Checks 11 
Timber Linings in Open Ditches .... 12 
Page 
Structures for Open Ditches— continued 
Surface-Water Inlets 14 
Stock Guards 15 
Sluiceways and Tide Gates 15 
Ocean Outlets 18 
Bridges and Culverts 19 
Flumes and Inverted Siphons 25 
Miscellaneous Structures 27 
Pump Houses 27 
Connections for Flushing Drains .... 29 
Relief Well Connections 30 
Connections for Diverting Water .... 31 
Watering Places for Livestock 31 
Transitions 32 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1926 
