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174.02.650 Restore or Restoration. <br />"Restore." "restoration" or "ecoloqical restoration" means repairinq environmental damaqe to a <br />condition equivalent to the pre-impact condition. or upqradino of impaired critical area processes or <br />functions. This may be accomplished throuqh measures includinq. but not limited to. re-veqetation. <br />removal of intrusive stream bank structures. or removal or treatment of toxic materials. Restoration <br />does not implv a requirement for returnino the critical area to aboriqinal or pre-European settlement <br />conditions. <br />17A.02.660 Riparian. <br />"Riparian" areas are transitional between terrestrial and aquatic ecosystems and are distinquished <br />bv gradients in biophysical conditions. ecoloqical processes. and biota. Thev are areas throuoh <br />which surface and subsurface hvdrologlr connect waterbodies with their adjacent uplands. They <br />include those portions of terrestrial ecosvstems that sionificantlv influence exchanqes of energy and <br />matter with aquatic ecosvstems (i.e.. a zone of influence). <br />'174.02.665 RiparianManaqementZone(s) <br />"Riparian management zone(s)" or "RMZ(s)" is a scientificallv based description of the area adiacent <br />to rivers and streams (see "riparian") based on the site potentialtree heiqht conceptualframework. lt <br />is the area that has the potentialto provide full ecoloqicalfunction for bank stabilitv. shade. pollution <br />removal. contributions of detrital nutrients. and recruitment of larqe woodv debris. <br />174.02.670 Seismic Hazard Areas. <br />"Seismic hazard areas" are areas subject to severe risk of damage as a result of earthquake induced <br />ground shaking. slope failure. settlement. soil liquefaction. lateral spreading, or surface faulting= <br />17A.02.680 Setback. <br />"Setback" means the distance a building or structure is placed from a specified limit such as a lot line <br />or a critical area buffer. <br />17A.02.690 Shorelines of the State. <br />"Shorelines" means all of the water a reas of state. includino reservoirs. and their associated <br />shorelands. toqether with the lands underlvinq them: except (i) shorelines of statewide siqnificance: <br />(ii) shorelines on segments of streams upstream of a point where the mean annual flow is twentv <br />cubic feet per second (20 cfs) or less and the wetlands associated with such upstream seqments: <br />and (iii) shorelines on lakes less than twenty (20) acres in size and wetlands associated with such <br />smalllakes. <br />1 7A O? 700 Sh nes of Statewide Sionificance. <br />"Shorelines of statewide siqnificance" means the shorelines identified in RCW 90.58.030 which <br />because of their elevated status require the optimum implementation of the Shoreline Management <br />Act's policies. This includes all rivers with a mean annual flow of qreater than two hundred cubic feet <br />areas of one nd 000 acres or m <br />one or more lavers of perennial bunchorasses and a conspicuous but discontinuous laver of shrubs <br />(see Eastside Steppe for sites with little or no shrub cover). Althouqh Bio Saqebrush (Artemisia <br />tridentata) is the most widesoread shrub-steppe shrub. other dominant (or co-dominant) shrubs <br />include Antelope Bitterbrush (Purshia tridentata). Threetip Sagebrush (A. tripartita), Scabland <br />Saqebrush (A. rioida), and Dwarf Saqebrush (A. arbuscula). Dominant bunchqrasses include (but <br />30