94 



LANDSCAPE GARDENING. 



Construction of Drives and Walks. 



A good walk or drive cannot be made on a poor founda- 

 tion, any more than a bridge or a house. A foundation 

 must be provided that will not allow of settling unevenly 

 by the action of frost. Standing water under the walk will 

 also cause uneven settling, and one of the first steps to take 

 in providing for the foundation is the removal of any 

 surplus water. If not naturally underdrained, a tile or 

 stone drain should be laid not less than 3J feet below 

 the surface, and if the land is very wet and the walk wide 

 a line of tile on each side, Fig. 53, may be necessary. On 



FIG. 53. SECTION OF WALK OR DRIVE SHOWING LOCATION OP 



TILE. 



a side hill a deep-laid drain on the upper side, Fig. 54, a 

 little distance from the walk will often be more effective 

 than if laid directly under it. If the whole lawn is well 



FIG. 54. SECTION OF WALK OR DRIVE ON SIDE HILL. 



underdrained, no other drainage need be provided except 

 that obtained in construction. 



To provide a walk that shall be dry at all times and 

 especially after very heavy rains, the material of which it 



