1998-01-22_AgendaPacket - Laserfiche WebLink

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By Date ATTAC)•-IIv1ENT A Ramsey County Department of Public Works Bridge and Culvert General Permit No. 98-6073 ~licable Projects. This permit applies only to those projects that are designed under the supervision of a registered professional engineer. Any project not meeting all conditions of the permit or any project the Department identifies as having the potential for significant resource impacts, is not authorized herein. Rather, such projects must be submitted as separate individual permit applications. 2. Erosion Control. All exposed areas above the ordinary high water level shall be sodded, seeded, or riprapped as needed to prevent erosion and sedimentation. Erosion control measures shall be adequately designed for site characteristics. They may include staked hay bales, diversion channels, sedimentation ponds, or sediment fences. They shall be installed prior to commencement and maintained throughout the project All exposed soil shall be restored by seeding and mulching or sodding and staking within 72 hours of completion of project The erosion control fence next to the water body shall run parallel to the contours and shall be trenched into the soil to prevent underfloor. 3. Control sediment during construction. A sediment bamer shall be installed around the area of excavation/fill placement during the project to limit turbidity to the affected area. This barrier may involve use of a filter fabric material attached to stakes or a snow fence anchored to the bed of the public water. The barrier shall be removed upon completion of the work after collected sediment has been removed to the greatest possible extent. 4. Flotation Sediment Curtain. Any work below the water level shall be encircled by a floatation sediment curtain to prevent sediment from being transported beyond the construction site. This curtain shall be constructed and maintained as illustrated on the attachment entitled "6.6 Flotation Silt Curtain". The bamer shall be removed upon completion of the work a$er collected sediment has been removed to the greatest possible extent S. Seedin¢. In the event the site cannot be stabilized with vegetation before October 15th, all exposed soil shall be adequately mulched at a rate of not less than 35001bsJacre leaving no more than 20 percent visible soil surface and maintained until seeding/sodding can be achieved 6. Preserve natural vegetation. Work done under this pemut must minim;~e impacts to natural shoreline and lake/stream bed vegetation. 7. Aquatic vegetation removal. No removal or destn-ction of aquatic vegetation is permitted unless an Aquatic Plant Management Permit is obtained from DNR Fisheries Section(772-7950), or the removal consists of mechanical (i. e., not chemical) removal of submerged or floating aquatic vegetation that meets the conditions for not requiring a pemut (i.e., not mechanical removal of submerged or floating aquatic vegetation in an area of less than 2,500 square feet). Note: Removal of any amount of emergent vegetation is prohibited unless a permit has been obtained from DNR Fisheries. 8. Purple Loosestrife. The permittee shall monitor all disturbed areas for the presence of purple loosestrife and control the plant as descnbed in the suached pamphlet titled Purple Loosestrife Alert. The DNR aquatic plant manager should be contacted at 772-790 for permit needs and additional information. 9. Structures. Structures shall not be constructed with materials that would have a detrimental impact on aquatic organisms or water quality. 10. Material storage. Excavated materials must be deposited or stored in an upland area, in a manner where the materials will not be redeposited into the protected water by reasonably expected high water or runoff. 11. 1F ,plau3, Excavated materials shall not be perrnanently placed within community designated flood plain areas or shoreland areas, unless all necessary local permits and approvals have been obtained.