04-27-2015 Council Packet - Laserfiche WebLink

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Anchoring The contractor shall anchor Type 3 mulches with a disk, clod buster or other approved equipment. The mulch shall be anchored immediately after placement unless otherwise authorized by the engineer. Watering Spring and summer seedlings benefit from regular watering the 4-6 weeks. Watering should occur in the early morning, every other day, for half an hour. Erosion Control The city will use appropriate erosion control measures to prevent sedimentation and degradation of the undisturbed buffer areas during construction. Prior to construction, silt fence will be installed to intercept run-off. Immediately following grading of side slopes greater than 3:1, wood fiber blanket (or other slope stabilizing method approved by engineer) will be applied over approved seed mixture and a minimum 4" top -soil. Seed mix and mulch used on the project will be certified weed free. Erosion control installations will remain in place and be maintained in good condition by the contractor until the site has been re -vegetated. The contractor is to use best management practices with regards to erosion control — to include the following: • • • • Inspect silt fences immediately after each half inch rainfall at least daily during prolonged rainfall. Immediately repair failed or failing silt fence. Replacement — fabric shall be replaced promptly when it decomposes or becomes ineffective until the barrier is no longer necessary. Sediment removal — sediment deposits shall be removed after each storm event when deposits reach approximately one-half the height of the barrier. Sediment remaining in place after the silt fence is no longer required shall be dressed to conform to the existing grade, prepared, and seeded with the appropriate seed mix. Removal of silt fence — silt fences shall be removed when they have served their useful purpose, but not before the upward sloping area has been permanently stabilized. Vegetation Maintenance The wetland buffers will be maintained to discourage the growth of non-native or invasive species. Activities allowed within the buffer will be those that promote growth of native vegetation, including: • Periodic cutting or burning to promote growth of native vegetation. • Spot spraying of non-native or invasive species. • Actions to address diseased species. • Activities required for the safety of the general public. • Other actions to improve buffer or habitat area quality, as approved by Rice Creek Watershed District. Buffers will be kept free of fertilizer, trash, snow, mulch, yard waste and will not be cropped, pastured, or mowed (except as to promote growth of native vegetation). Placement of structures, public utilities, and non -motorized linear surfaces (e.g., trails) will be avoided within the buffer except with approval by Rice Creek Watershed District.