Agency Standard Removal/Fill Permit Conditions

The following is a list of standard conditions that may be added to removal/fill permits by the U.S. Army Corps of Engineers and the Oregon Division of State Lands. The list is provided for informat- ional purposes.

Division of State Lands
a. General
i. Care shall be taken to prevent any petroleum products, chemicals, or other deleterious materials from entering water.

b. Water Quality, Riparian, Fish & Wildlife
ii. Work in the waterway shall be done so as to minimize turbidity increases in the water that would degrade water quality and damage aquatic life. Turbidity shall not exceed 10% above natural stream turbidities, except as allowed by OAR 340-41.
iii. Turbid waste waters from the project shall be provided adequate settling time.
iv. Waste materials and spoils shall be placed above the bankline behind previously constructed berms and not in any unauthorized wetland areas.
v. Waste water from hydraulic dredging operation shall comply with appropriate water quality standards.
vi. Rock riprapping and placement of bulkheads shall be done between March 1 and January 1 and shall be constructed in a manner that does not appreciably increase the upland surface area. Only clean, durable riprap should be used, and the completed revetment shall have a slope no steeper than 1 1/2:1.
vii. The disturbed areas above the riprap shall be revegetated and landscaped to prevent soil erosion.
viii. The Division of State Lands retains the authority to temporarily halt of modify the project in case of excessive turbidity of damage to natural resources.
ix. Removal of existing woody vegetation shall be minimal.

c. In-water dredging and disposal
x. Dredging in the permit area shall be conducted between November 1 and February 28.
xi. If a bucket dredge of any type, including but not limited to grab or clamshell, dipper, dragline or backhaul bucket is used, all digging passes of the bucket shall be completed without any material, once in the bucket, being returned to the wetted area except as approved.
xii. If a hydraulic dredge is used, the dredge is to be operated with the intake on or below the surface of the material being removed.
xiii. During hydraulic dredging, the return water discharge from the disposal area must be over a weir structure that is designed and operated so the water crest height over the weir does not exceed three inches at maximum flows.
xiv. Levees and weirs should be designed to regulate disposal pond water depth to an average of two feet whenever a discharge is occurring.
xv. Material shall not be removed to a depth greater than depicted on the permit drawing.
xvi. The maintenance dredge spoil site shall be limited to the minimum area needed.
xvii. The maintenance dredge spoil site shall be replanted with after disposal is completed.
xviii. A drag-line bucket dredge shall only be used adjacent to the shoreline or if debris precludes using a hydraulic dredge. A single pass with the bucket shall be made each time from the point of dredging to a bermed disposal area or a dump truck.

Army Corps of Engineers
a. General
i. All construction debris shall be disposed of in such a manner that it cannot enter the waterway.
ii. Care shall be taken to prevent any petroleum products, chemicals, or other deleterious materials from entering the waterway.
iii. Your use of the permitted activity must not interfere with the publics right to free navigation on all navigable waters of the United States.
iv. You must advise this office in writing at least two weeks before you start maintenance dredging activities under the authority of this permit.
v. You must install and maintain, at your expense, any safety lights and signals prescribed by the U.S. Coast Guard through regulations or otherwise, on your authorized facilities.
vi. The Coast Guard must be notified by letter 14 days prior to commencing dredge operations.
vii. The method of dredging or disposal or the dredge or disposal locations may not be changed without the prior written approval of the District Engineer.
viii. You must have a copy of this permit available on the vessel used for the authorized transportation and disposal of dredged material.

b. Water Quality, Riparian, Fish & Wildlife
ix. Work in the waterway shall be done so as to minimize turbidity increases in the water that tend to degrade water quality and damage aquatic life.
x. All areas along the bank, disturbed or newly created by the construction activity, shall be seeded, sodded, revegetated, or given some other equivalent type of protection against subsequent erosion.
xi. When the District Engineer has been notified by a fishery agency that a filling activity is adversely affecting fish or wildlife resources or the harvest thereof, and when the District Engineer subsequently directs remedial measures, the permittee shall comply with such directions as may be received to suspend or modify the activity, to the extent required to mitigate or eliminate the adverse effect.
xii. When the District Engineer has been notified by the Department of Environmental Quality that the dredging activity is adversely affecting water quality, and the District Engineer subsequently directs remedial measures, the permittee shall comply with directions to suspend or modify the activity to mitigate or eliminate the adverse effect.

c. In-water dredging and disposal
xiii. All in-water work, including temporary fills, shall occur within the Oregon Department of Fish and Wildlife preferred work period, which is between November 1 and February 28 for the lower Columbia River.
xiv. Material shall not be removed to a depth greater than -40 feet Mean Lower Low Water.
xv. The discharge point shall be subsurface (-5 feet MLLW) and directed downstream. The discharge pipe shall be marked according to Coast Guard Standards.
xvi. Discharge may commence disposal operations when the bottom water is ebbing or approximately one-hour after the beginning of the start of surface ebb.
xvii. The hydraulic dredge is to be operated with the intake on or below the surface of the material being removed.
xviii. Back washing of the hydraulic dredge intake line shall be held to an absolute minimum. When backwashing is necessary, the intake shall be raised no more than 3 feet above the river bottom.
xix. The discharge pipe shall be sunk when not in use to a depth sufficient to insure it does not impede or create a hazard to navigation
xx. If a bucket dredge of any type, including but not limited to grab or clamshell, dipper, dragline, or backhaul bucket, is used, all digging passes of the bucket shall be completed without any material, once in the bucket, being returned to the wetted areas.

d. testing
xxi. Contact the Portland District Corps Regulatory Office to evaluate the need for sediment testing. The notification shall be a minimum of 4 months before the desired start date. The decision regarding testing requirements will be based on the protocol established in the "Dredged Material Evaluation Framework - Lower Columbia River Management Area, November 1998."