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` i. <br /> cµ, <br /> ,� surrounding soils are saWrated (no infiliration occurs) and lhis eslimate dces not factor in plant <br /> �� <br /> �a't unlake. <br /> t <br /> �;`� Given that Wedand A provides Iess than an estimated 900 cubic feet of dead storage capacity, h:u <br /> no cftecti�•e livc storagc, and provides about 2 months hydraulic residence time for only about 900 <br /> � cubic feet of water, it is considerecl to provide minim�l stormwater storage funetions tliat provide <br /> no �ueasurablc benefit to the Silver Lakc Watcrshcd. <br /> �Vater Quali'cy I�unetions. Givr,n that the drainagc ditch that provides hydrology to Welland A <br /> ronvcys at Ic.ist somc untrcated storntwatcr runoff lhe�vetland has an oppoRunity to provide water <br /> quality improvements. �Phc entire wetland is vcgctatcd with heruaccous and scrub-shrub <br /> vegetation, and a fcw trees. Approximately 80 percent (about 3,400 square feet) of the �vetland <br /> supports herUaccous vegclative cover dominatcd by rced ca�iarygr:us. Although finer-stemmed <br /> herbacwus planls yield �'catcr water quality benefits, the existing reed canarygrass provides water <br /> quality benefits by providing a Uonding mcdium for suspcnded parliculates. Tl�e dead stongc <br /> provided by Wetland A also allows prccipitation of suspended pa�rti u/l�1/tes. -�+ � � <br /> G�H!�lY�CY�E�' �r Yiws-Z%o....�II.N�Iw,w. <br /> s� E �-� ay . <br /> Habitat Functions. 'Chc existing weUand is dominateJ by rce<I cmiarygrass, a non-native, invasivc <br /> spccies. I.t also supports sahnonUcrry and young red aldcr trees, bolh nativc species. Tlie threc <br /> primary specics tlial are rresent, onc of which is an i�ivasive species, provide minimal habitat <br /> diversily. No snags, rlo:vned logs, or other habitat fcalures are present. Because it is a constructect <br /> ditch with a sediment substrate, thc drainage provides littic habitat benefits oq�cr than thc simple <br /> conveyance of waler. The small size of the wedand fiuther diminishes the habit.Q functions <br /> provided. Thc scn�b-shn�U component of Wetland A lil�ely provides suitable foraging, cover, and <br /> possibly nesting habitat for p:userine birds common to U�e azea. The weNand likely also provides <br /> covcr and foraging haUitat for small mammels such as mice, voles, and shreivs. Because the stream <br /> tlows are seasonal :uid surfacc water in the weUand is periodic and printarily occurs diving the <br /> winter months, die wetland provides li(tle habitat bencfit for amphibians. The lack of woody debris <br /> and the dominancc oCrecd canarygr.�ss fiirthcr diminish habitat suitability for amphibians. <br /> Post�rojecl Coitditious <br /> The p roposed d cvclopmenl p rojecl p rovides a n o pportunity to improve thc minimat functions <br /> currenUy provided by Wetland A and thc associatcd drainagc. Following lhe in:plementation oC <br /> thc mitigation conccpts idcnlificd in thc attached conceptual mitigation plan (Appendix D), <br /> stomiwater storage, watcr qualiry, and habitat fiuictions provided by Wedand A and the drainage <br /> �vill be improved. Thcsc improvcments are summarizcd in Tabfe 3 and discussed fiirtlier below. <br /> ,, owrra�cnrnoowao�i�ozi.ros000�nvrc��wcrwma�on�wvxwax I�0 <br /> p..��� Scnsiiivc Arcas tivalualion 13 July 200a <br /> �r Silvcr I.akc Ccn�cr Property <br /> R�'" <br /> r�� <br />