Ordinance 3676-19 - Laserfiche WebLink

Habitat Model with individual site scores compared to scores for other assessment units within the Ecological Mbmagernent Unit within which the mitigation action is proposed. If the proposed action is below OHWM, impacts to habitat would be addressed through the Salmon Overlay. mitigation area equals or exceeds that for the impacted area as follows: Area (ewes))( quality(1, 2, er 3) X inundation frequency [1/(return frequency in years x 365)1 or; Area (acres)X quality(1, 2, or 3) X inundation frequency as follows: If an impacted area in the flood ._ .. -- - - frequency should be set at 1/(100 x 365). In no case shall the minimum habitat mitigation requirement be less than 0.1 acre of mitigation for each 1.0 acre impacted. 4. The following priorities for mitigation of impacts to fish habitat within the 100-year floodplain shall be considered in the habitat assessment and mitigation plan, with the long term goal of improving functions and values of fish habitat in the estuary over existing conditions: i. Assignment(purchase) of equivalent mitigation credits from an established mitigation bank within the estuary- r -1 . -05-1- S-P`aN-P c L r'�"#• ii. Creation or restoration of the functions and values of fish habitat in an area that is available to fish more frequently than the habitat being impacted; iii. Creation or restoration of off-channel refuge habitat; iv. Restoration of fish habitat where it has been previously eliminated or degraded; v. Enhancement of existing habitat to improve functions and values; vi. Buffer enhancement in riparian habitat areas. vii. Replacement of the habitat functions and values that are impacted by development. 5. Also in accordance with RPA-3.A.3.b,where conditions permit,the City shall require development within the 100-year floodplain to use Low Impact Development(LID) methods such as those described in the Low Impact Development Technical Guidance Manual for Puget Sound (WSU—Puget Sound Partnership), to minimize or avoid stormwater effects. 6. All development proposals shall protect, enhance, or restore habitat to the maximum extent practicable, either on-site or off-site. 7. When development occurs in floodplain areas,the portion of the site not elevated above the 100- year flood elevation shall be designed to create floodplain refugia and prevent stranding of aquatic species during flood events to the maximum extent practicable. 8. Restoration of fish habitat either on-site or off-site is allowed in order to mitigate for habitat impacts caused by development within the floodplain. Restoration and mitigation for impacts may occur in areas which flood more frequently than the area proposed for development(e.g.,tidal restoration protect that provides greater habitat benefits to Juvenile salmonids). 9. The City shall have the authority to require changes in the design of a development if necessary to avoid, minimize or mitigate impacts to endangered species or habitat for such species. Planning Commission Resolution 19-04 Page 64 Critical Areas March 19, 2019