Читать книгу Sewerage and Sewage Treatment - Harold E. Babbitt - Страница 15
Оглавление| 1. Tunnel Sections. | 2. Open Cut Sections. | ||||
| Type A. | Type B. | Type C. | Type D. | ||
| Where Rock is more than 16′ above Springing Line. | Where Rock is more than 7′ and less than 16′ above Springing Line on both Sides. | Where Rock is between Springing Line and 7′ above Springing Line on both Sides. | Where Rock drops below Springing Line on either Side. | 16′ 6″ Sewer. 25′ Fill | Where Rock is above Springing Line |
| Mill Creek Sewer, St. Louis, Eng. Record, Vol. 70, pp. 434, 435. |
