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UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 300 ^ %*, 
Contribution from the Office of Public Roads and Rural Engineering 
LOGAN WALLER PAGE, Director 
**V 
Washington, D. C. PROFESSIONAL PAPER Noveflrber l<£ift5 
. ^ ^ ^. ,. 
EXCAVATING MACHINERY USED IN 
LAND DRAINAGE 
By 
D. L. YARNELL, Drainage Engineer 
CONTENTS 
Page 
Introduction . 1 
Development of Excavating Machinery . 2 
The Floating Dipper Dredge 3 
The Floating Grab-bucket Dredge ... 17 
The Drag-line Scraper Excavator ... 18 
The Dry-land Dipper Excavator . . . l . 25 
Page 
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 •• 3 ? 
JHas been rev. 
— see rev#ed« 
; binders at 
| end of file. 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1915 
