| 11. | Four penstocks lead from the surge chamber, one for each unit, following the natural slope of the escarpment.
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| 12. | It was so skillfully done that many believe the park and road are set on a natural slope.
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| 13. | There are steep natural slopes on three sides of the fort, and linear ramparts across the flat southern approaches.
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| 14. | The hillfort is defined by a steep, natural slope from the south and north with two ramparts to the east.
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| 15. | The hill was usually sculpted for defensive purposes, with the top flattened and the natural slopes made steeper for defence.
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| 16. | In the case of natural slopes the choice of re-profiling scheme is not as simple as that for artificial slopes.
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| 17. | Vacuum sanitary sewers take advantage of available natural slope and are most economical in flat sandy soils with high ground water.
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| 18. | The hill fort is defined by a steep, natural slope from the south and north with two ramparts to the east.
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| 19. | The mammoth lodge sits upon a natural slope overlooking the entrance to Nahuel Huapi National Park, Argentina's oldest and most treasured.
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| 20. | Bethel Woods features a stage, a 4, 500 covered seat pavilion and a natural sloping lawn accommodating up to 10, 500 people.
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