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This direction may be general or specific; it may prescribe the process through which decisions are made, how an action is to be accomplished, or the results to be achieved.
The Directives System is designed to provide NPS management and staff with clear and continuously updated information on NPS policy and required and/or recommended actions, as well as any other information that will help them manage parks and programs effectively.
Overall, the flush was able to scour sediments accumulated over the channel invert up to a significant distance from the gate.
The analysis of the results revealed that the flush had a different impact on the various sediments present in the bed mixtures, with most of the eroded volume including sediment particles smaller than the median grain size.
Sometimes the initiative does not originate within the Park Service, but rather with persons or organizations outside the Park Service who have a strong interest in how the Service manages the parks.
However, NPS policy is usually developed through a concerted workgroup and consensus-building team effort involving extensive field review, consultation with NPS senior managers, and review and comment by affected parties and the general public.
Enjoyment by present and future generations can be assured only if these special places are passed on to them in an unimpaired condition.