Regrading is the process of raising and/or lowering the levels of land; such a project can also be referred to as a regrade. Regrading may be done on a small scale (as in preparation of a house site) or on quite a large scale (as in major reconfiguration of the terrain of a city, such as the Denny Regrade in Seattle, Washington). Regrading is typically performed to make land flatter (in which case it is sometimes called levelling), but can have the side effect of making other nearby slopes steeper.
Reasons for regrading include:
- Allowing construction in areas that were previously too steep.
- Enabling transportation along routes that were previously too steep.
- Changing drainage patterns.
- Improving the stability of terrain.
Potential problems with regrading include:
- Biological/ecological impacts.
- Drainage problems for areas not taken into account in the regrading plan.
- Walt Crowley, Seattle Neighborhoods: Belltown-Denny Regrade -- Thumbnail History, HistoryLink.org essay #1123, May 10, 1999. Accessed online 16 October 2007.
- Trees and Home Construction: Minimizing the impact of construction activity on trees, University of Ohio Extension Bulletin 870-99. Accessed online 16 October 2007.
- "Montana, McLaren Tailings", p.35 in CERCLA Imminent Hazard Mining and Mineral Processing Facilities, Office of Solid Waste, U.S. Environmental Protection Agency, February 1997. Accessed online 16 October 2007.
- Malcolm Puller, Deep Excavations: A Practical Manual, Thomas Telford (1996). ISBN 0-7277-1987-4. p. 63.
- Barry Stone, Adjacent Property Regrading Creates Drainage Problem for Homeowner, doityourself.com. Accessed online 16 October 2007.
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