UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 300 



Contribution from the Office of Public Roads and Rural Engineering 

 LOGAN WALLER PAGE, Director 



Washington, D. C. 



PROFESSIONAL PAPER 



November 10, 1915 



EXCAVATING MACHINERY USED IN 

 LAND DRAINAGE 



By 

 D. L. YARNELL, Drainage Engineer 



CONTENTS 



Introduction 



Development of Excavating Machinery 

 The Floating Dipper Dredge .... 

 The Floating Grab-bucket Dredge . . 

 The Drag-line Scraper Excavator . . 

 The Dry-land Dipper Excavator . . . 



Pago 

 1 

 . 2 

 3 

 . 17 

 . 18 

 . 25 



The Dry-land Grab-bucket Excavator . 28 



The Templet Excavator 28 



The Wheel Type of Excavator .... 30 



The Hydraulic Dredge 33 



Machines for Cleaning Old Ditches . . 35 



Summary 37 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1915 



