Temporary Best Management Practices (BMPs) are required during all construction in the Tahoe Basin, until permanent BMPs have been installed on the disturbed site. Temporary BMPs differ from permanent BMPs because they are designed to remain effective for a relatively short duration of time, usually only until a construction site is completed and permanent BMPs can be applied. Depending on the nature of the activity and site characteristics, a variety of different BMPs may be employed to keep sediment from leaving a construction area.