Section 230.54 - Parks, national and historical monuments, national seashores, wilderness areas, research sites, and similar preserves(a) These preserves consist of areas designated under Federal and State laws or local ordinances to be managed for their aesthetic, educational, historical, recreational, or scientific value.(b) Possible loss of values: The discharge of dredged or fill material into such areas may modify the aesthetic, educational, historical, recreational and/or scientific qualities thereby reducing or eliminating the uses for which such sites are set aside and managed.Possible actions to minimize adverse impacts regarding site or material characteristics can be found in subpart H.