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Exhibit B <br />ORDINANCE Exhibit A - Page 36 of 55 <br />Category <br />and <br />Type of <br />Wetland <br />Impacts <br />Reestablishment <br />or Creation <br />Rehabilitation <br />Only1 <br />Reestablishment <br />or Creation (R/C) <br />and Rehabilitation <br />(RH)1 <br />Reestablishment <br />or Creation (R/C) <br />and Enhancement <br />(E)1 <br />Enhancement <br />Only1 <br />ditches, or breaking drain tiles. Activities could also involve breaching a dike to reconnect wetlands to a floodplain or <br />return tidal influence to a wetland. Reestablishment results in a gain in wetland acres. <br />Rehabilitation = The manipulation of the physical, chemical, or biological characteristics of a site with the goal of <br />repairing natural or historic function of a degraded wetland. Activities could involve breaching a dike or reconnecting <br />wetland to a floodplain or returning tidal influence to a wetland. Rehabilitation results in a gain in wetland function but <br />does not result in a gain in wetland acres. <br />Enhancement = The manipulation of the physical, chemical or biological characteristics of a wetland site to heighten, <br />intensify or improve functions or to change the growth stage or composition of the vegetation present. Enhancement <br />is undertaken for specified purposes such as water quality improvement, flood water retention or habitat. Activities <br />typically consist of planting vegetation, controlling nonnative or invasive species, modifying the site elevation or the <br />proportion of open water to influence hydroperiods, or some combination of these. Enhancement results in a change <br />in some wetland functions and can lead to a decline in other wetland functions, but does not result in a gain in wetland <br />acres. <br />1 These ratios are based on the assumption that the rehabilitation or enhancement actions implemented <br />represent the average degree of improvement possible for the site. Proposals to implement more <br />effective rehabilitation or enhancement actions may result in a lower ratio, while less effective actions <br />may result in a higher ratio. The distinction between rehabilitation and enhancement is not clear-cut. <br />Instead, rehabilitation and enhancement actions span a continuum. Proposals that fall within the gray <br />area between rehabilitation and enhancement will result in a ratio that lies between the ratios for <br />rehabilitation and the ratios for enhancement. <br />2 Bogs are considered irreplaceable wetlands because they perform some special functions that cannot <br />be replaced through compensatory mitigation. Impacts to such wetlands would therefore result in a net <br />loss of some functions no matter what kind of compensation is proposed. <br />a. Increased Mitigation Ratios. The city may increase the ratios under any one of the <br />following circumstances: <br />(1) Uncertainty as to the probable success of the proposed restoration or <br />creation; <br />(2) Significant period of time between destruction and replication of wetland <br />functions; <br />(3) The proposed mitigation will result in a lower category wetland or <br />projected losses in functions relative to the wetland being impacted; <br />(4) The relocation is off site or the replacement is with out-of-kind <br />compensation; <br />(5) The wetland has been illegally filled or altered.