From the leading conservation organization--the trail building and maintenance bible, now updated and expanded to meet new techniques and new realities of the 21st century. New chapters on arid lands restoration and involving conservation volunteers. The latest in effective management of work crews of all ages.The SCA Trail-building and Maintenance Manual Robert Birkby ... Whatever the design, always begin working at the bottom of a structure and build toward the top. Solid Rock Staircases On gentle slopes, a series of rocks placed as ascendinganbsp;...
|Title||:||Lightly on the Land|
|Publisher||:||The Mountaineers Books - 2005|