OAR 141-093-0275
Maintenance Dredging - Specific Conditions

(1)

General Conditions Apply. All requirements, procedures and conditions set forth in OAR 141-093-0135 (General Conditions) (General Conditions) apply to this General Permit, except as follows:

(a)

General Condition (8) Pre-construction Resource Area Fencing or Flagging does not apply; and

(b)

General Condition (9) Erosion Control Methods applies only to maintenance dredging activity involving upland placement of material.

(2)

Removal-General.

(a)

To the extent practicable, maintenance dredging activity must be staged from an upland or vessel-mounted position. If necessary to achieve the removal, heavy equipment may be staged on or traverse impervious surfaces in the dry below ordinary high water or highest measured tide. In such case, equipment must use water quality best management practices specified in the DEQ-issued Section 401 Water Quality Certification for the project.

(b)

For vessel-mounted operations, vessels must not be grounded on the bed or banks at any time.

(c)

Accumulated woody debris within the maintenance dredging footprint may be removed to the extent necessary to achieve the target bathymetry.

(3)

Removal by Hydraulic Pipeline Dredge.

(a)

To the extent practicable and as material characteristics allow, the working end of the dredge ladder must be kept buried at a target depth of at least 24 inches below the bottom of the waterway. The intake may be raised no more than 3 feet above the bed for the minimum time necessary for purging or flushing. No back-flushing of the pipeline is allowed. No jetting of sediment is allowed unless approved by the Department pursuant to OAR 141-093-0260 (Maintenance Dredging - Eligibility Requirements)(3).
(b)The pipeline and any anchors or floats must be removed from the waterway immediately upon completion of the maintenance dredging activity unless another minimum necessary timeframe is approved by the Department. In no case will the pipeline, anchors, floats or other equipment be permanently placed in waters of this State.

(c)

Pressure in the dredge pipeline must be continuously monitored during operation. In the event of a sudden and sustained pressure drop, dredging activity shall immediately stop. Any breach of the pipeline must be repaired prior to restarting dredging operation.

(4)

Removal by Closed Bucket. To the extent material characteristics allow, the bucket must be sealed in the closed position to minimize sediment re-suspension. Moving material on the bottom to consolidate it before lifting is prohibited.

(5)

Material Transport. For dredged material transported by vessel or other over-water conveyance:

(a)

All dredged materials must be placed in vessels or other conveyances equipped such that no dredged material discharges to waters of this State during loading, transfer and unloading activity for upland placement.

(b)

Vessels must be staged such that there is no grounding on the bed or banks at any time.

(6)

Placement – General. Unless otherwise authorized by the governing regulatory agency or agencies, removed material must not be placed in any wetland, Federal Emergency Management Administration designated floodway, or in an area historically subject to landslides.

(7)

Upland Placement.

(a)

Removed material placed in an upland site must meet the Oregon Department of Environmental Quality definition of clean fill or the use must be specifically allowed by the Oregon Department of Environmental Quality by rule, permit, or other authorization.

(b)

Waste waters from the upland placement site must have adequate settling time before being discharged into a water of this State. Water discharged from the upland placement site must meet water quality requirements of the Oregon Department of Environmental Quality.

(8)

Flowlane Placement. Flowlane placement must occur on the ebb tide only and only when there is sufficient current to disperse the material to prevent shoaling.

(9)

Ocean Placement. Ocean placement may only occur as authorized by a USEPA letter of concurrence.

(10)

Ocean Shore Permit. If the project includes direct placement of material on the ocean shore, a separate Ocean Shore Permit, administered by Oregon Parks and Recreation Department, will be required to authorize that activity.

(11)

State-Owned Waterways. Maintenance dredging in a state-owned waterway may be subject to a Short-Term Access Agreement with the Department. The placement of state-owned material on uplands is subject to a Sand and Gravel Lease or License from the Department. Any beneficial use of state-owned material may be subject to royalty payments to the Department.

(12)

Fish Entrainment. The authorization holder must immediately report any fish observed that are entrained by operations to the nearest OR Department of Fish and Wildlife office. The permittee must provide access for OR Department of Fish and Wildlife staff to enter the project site for making fish entrainment observations.

(13)

Post-Activity Reporting. Within 90 days of maintenance dredging completion, the authorization holder must submit to the Department a scaled drawing illustrating the actual removal area and post-removal depths achieved using the same datum as used in the application.

(14)

Modifying Conditions. The Department may modify the conditions of the authorization at any time if necessary to reduce or eliminate adverse effects to water resources.

Source: Rule 141-093-0275 — Maintenance Dredging - Specific Conditions, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=141-093-0275.

141‑093‑0100
General 141‑093‑0103
Agency Process and Standards for Establishing General Permits 141‑093‑0104
Project Applicability 141‑093‑0105
Application Requirements and Completeness Review for Authorizing Projects under a General Permit 141‑093‑0107
Completeness and Eligibility Review for Authorizing Projects under a GP 141‑093‑0110
Public Review Process for Authorizing Projects under a GP 141‑093‑0115
Department Determinations and Considerations in Evaluating Applications to Authorize Projects under a GP 141‑093‑0120
Expiration and Annual Billing 141‑093‑0125
Enforcement 141‑093‑0130
Appeal Process for Authorizations Issued under General Permits 141‑093‑0135
General Conditions 141‑093‑0140
Transportation-Related Structures - Purpose 141‑093‑0141
Transportation-Related Structures - Eligibility Requirements 141‑093‑0145
Transportation-Related Structures - GP-Specific Application Requirements for Authorizing Projects 141‑093‑0150
Transportation-Related Structures - Authorized Activities 141‑093‑0151
Transportation-Related Structures - GP-Specific Conditions 141‑093‑0155
Minor Removal-Fill Impacts - Purpose 141‑093‑0160
Minor Removal-Fill Impacts - Eligibility Requirements 141‑093‑0165
Minor Removal-Fill Impacts - Compensatory Wetland Mitigation 141‑093‑0170
Minor Removal-Fill Impacts - Authorized Activities 141‑093‑0175
Minor Removal-Fill Impacts - GP-Specific Conditions 141‑093‑0180
Jackson County Vernal Pools - Purpose 141‑093‑0185
Jackson County Vernal Pools - Expiration 141‑093‑0187
Jackson County Vernal Pools - Review Process for Authorizing Projects 141‑093‑0190
Jackson County Vernal Pools - Definitions 141‑093‑0195
Jackson County Vernal Pools - Eligibility Requirements 141‑093‑0200
Jackson County Vernal Pools - Mitigation 141‑093‑0205
Jackson County Vernal Pools - Specific Application Requirements 141‑093‑0215
Jackson County Vernal Pools - Specific Conditions 141‑093‑0220
Maintenance Drainage - Purpose 141‑093‑0225
Maintenance Drainage - Eligibility Requirements 141‑093‑0230
Maintenance Drainage - Specific Application Requirements 141‑093‑0235
Maintenance Drainage - Authorized Activities 141‑093‑0240
Maintenance Drainage - Specific Conditions 141‑093‑0245
Maintenance Drainage - Fees 141‑093‑0250
Maintenance Dredging - Purpose 141‑093‑0255
Maintenance Dredging - Definitions 141‑093‑0260
Maintenance Dredging - Eligibility Requirements 141‑093‑0265
Maintenance Dredging - Specific Application Requirements 141‑093‑0270
Maintenance Dredging - Authorized Activities 141‑093‑0275
Maintenance Dredging - Specific Conditions 141‑093‑0280
Maintenance Dredging - Term and Reporting 141‑093‑0285
Certain Ocean Renewable Energy Facilities - GP-Purpose 141‑093‑0290
Certain Ocean Renewable Energy Facilities - GP-Definitions 141‑093‑0295
Certain Ocean Renewable Energy Facilities - GP-Eligibility Requirements 141‑093‑0300
Certain Ocean Renewable Energy Facilities - GP-Specific Application Requirements 141‑093‑0305
Certain Ocean Renewable Energy Facilities - GP-Authorized Activities 141‑093‑0310
Certain Ocean Renewable Energy Facilities - GP- Specific Conditions
Last Updated

Jun. 8, 2021

Rule 141-093-0275’s source at or​.us