Ord 2012-029 - Laserfiche WebLink

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Section 39.051 - Floodplain Easements Appropriate drainage and flood maintenance easements shall be granted to the City prior to approval of a plat application on all floodplain land that remains following reclamation authorized under the approved Qualified Watershed Protection Plan. Section 39.052- Stream Velocity Alterations of the floodplain shall not create an erosive water velocity on- or off -site. The mean velocity of stream flow at the site after fill shall be no Beater than the mean velocity of the stream flow under existing conditions. No alteration to the floodplain will be permitted which would increase velocities of flood waters to the extent that significant erosion of floodplain soils will occur either on the subject property or on other properties whether adjacent, upstream or downstream Mean channel velocities that exceed six f.p.s. are considered to be erosive. Section 39.053 - Side Slopes (a) The following standards apply to slide slopes: (1) To insure maximum accessibility to the floodplain for maintenance and other purposes, and to lessen the probability of slope erosion during periods of high water, maximum slopes of filled area shall not exceed four feet horizontal to one foot vertical. (2) Soil retention blankets must be installed on all fill slopes to promote the revegetation of the slope. (b) Rock gabion construction decorative stone faced reinforced concrete rip -rap or an approved equal erosion protection measure is required on slopes steeper than 3:1. (c) Vertical walls terracing and other slope treatments will be considered only as 1) part of a landscaping_ plan submission and 2) if no unbalancing of stream flow results. (d) Grass cover is required for all cut and fill slopes 3:1 or flatter. Fill slopes shall be seeded with at least three herbaceous species including_ grasses, legumes, and wild flowers, selected from the following list. A minimum of three of the species from the plant list in the Technical Manual for this Section shall be used one of which must be a flowering species. Section 39.054 - Mitigation Plans The mitigation plan for reclamation or alteration of a buffer zone or other floodplain area may provide for restoration creation enhancement, or preservation of aquatic habitats to ensure that activities result in minimal adverse effects to the aquatic environment. The mitigation plan may, but need not be the same as a mitigation plan required for obtaining a Section 404 permit. SECTION 3. If any word, phrase, clause, sentence, or paragraph of this ordinance is held to be unconstitutional or invalid by a court of competent jurisdiction, the other provisions of this ordinance will continue in force if they can be given effect without the invalid portion. 27