Page 93 - _ 180314 Special Yucaipa GSA Packet

Nationwide Permit 6 Effective Date: March 19, 2012

5. Shellfish Beds. No activity may occur in areas of concentrated shellfish populations, unless the activity
is directly related to a shellfish harvesting activity authorized by NWPs 4 and 48, or is a shellfish seeding or habitat
restoration activity authorized by NWP 27.

6. Suitable Material. No activity may use unsuitable material (e.g., trash, debris, car bodies, asphalt, etc.).
Material used for construction or discharged must be free from toxic pollutants in toxic amounts (see Section 307 of
the Clean Water Act).

7. Water Supply Intakes. No activity may occur in the proximity of a public water supply intake, except
where the activity is for the repair or improvement of public water supply intake structures or adjacent bank
stabilization.

8. Adverse Effects from Impoundments. If the activity creates an impoundment of water, adverse effects
to the aquatic system due to accelerating the passage of water, and/or restricting its flow must be minimized to the
maximum extent practicable.

9. Management of Water Flows. To the maximum extent practicable, the pre-construction course,
condition, capacity, and location of open waters must be maintained for each activity, including stream
channelization and stormwater management activities, except as provided below. The activity must be constructed to
withstand expected high flows. The activity must not restrict or impede the passage of normal or high flows, unless
the primary purpose of the activity is to impound water or manage high flows. The activity may alter the pre-
construction course, condition, capacity, and location of open waters if it benefits the aquatic environment (e.g.,
stream restoration or relocation activities).

10. Fills Within 100-Year Floodplains. The activity must comply with applicable FEMA-approved state
or local floodplain management requirements.

11. Equipment. Heavy equipment working in wetlands or mudflats must be placed on mats, or other
measures must be taken to minimize soil disturbance.

12. Soil Erosion and Sediment Controls. Appropriate soil erosion and sediment controls must be used and
maintained in effective operating condition during construction, and all exposed soil and other fills, as well as any
work below the ordinary high water mark or high tide line, must be permanently stabilized at the earliest practicable
date. Permittees are encouraged to perform work within waters of the United States during periods of low-flow or
no-flow.

13. Removal of Temporary Fills. Temporary fills must be removed in their entirety and the affected areas
returned to pre-construction elevations. The affected areas must be revegetated, as appropriate.

14. Proper Maintenance. Any authorized structure or fill shall be properly maintained, including
maintenance to ensure public safety and compliance with applicable NWP general conditions, as well as any
activity-specific conditions added by the district engineer to an NWP authorization.

15. Single and Complete Project. The activity must be a single and complete project. The same NWP
cannot be used more than once for the same single and complete project.

16. Wild and Scenic Rivers. No activity may occur in a component of the National Wild and Scenic River

the river is in an official study status, unless the appropriate Federal agency with direct management responsibility
for such river, has determined in writing that the proposed activity will not adversely affect the Wild and Scenic
River designation or study status. Information on Wild and Scenic Rivers may be obtained from the appropriate
Federal land management agency responsible for the designated Wild and Scenic River or study river (e.g., National
Park Service, U.S. Forest Service, Bureau of Land Management, U.S. Fish and Wildlife Service).

17. Tribal Rights. No activity or its operation may impair reserved tribal rights, including, but not limited
to, reserved water rights and treaty fishing and hunting rights.

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Yucaipa Groundwater Sustainability Agency - March 14, 2018 - Page 89 of 226