|
Guptil Site, 04-RS-001
<br />April 28,2004
<br />Page 3
<br />Elmer StreetParcels: 1.07 ac x 03 = 0.321 ac = 13,9g3 sq. ft,
<br />Guptil Parcel: 2.65 ac x 03 = 0.795 ac = 34, 630sq. ft.
<br />����� ��� �
<br />As previously indicated, the proposed tnits were as�irod to be 1,100 sq. ft, It v� also assumed
<br />that at least 1 surface parking area for each unit without 2 underground parking spaces would be
<br />required, as 2 spaces per unit is required per the City Code. Therefore, the amount of impervious
<br />that will created is as follows:
<br />Elmer Street Parrels (14 units)
<br />3-story building with 5 units/floor; 1,100sq, ft x 5= 5,500 sq. &
<br />15 surfaceparking spots at 300 sq. ftlspot: 300 sq. ft, x 14 = 4,500 sq. ti.
<br />1,OOOsq. ft, of additional impervious for driveway entrance, sidewalks, etc.
<br />Total Impervious = 5,500 +4,500 + 1,440 = 11,000 sq. ft,
<br />Guptil North (5 u�its)
<br />5 individual units: 1,10A sq. ft, x 5= 5,500 sq. ft,
<br />4,500 sq. ft for driveways
<br />Total IYrQerviaus = 5,500 + 4,500 =]D,000 sq. ft.
<br />Guptil South (21 units)
<br />3-story building with 7 units/floor: 1,100 sq. ft x 7= 7,700 sq. ft.
<br />21 parking spots at 300 sq. ft,/s�ot: 300 sq. R x 21 = 6,300 sq. ft.
<br />1,OOOsq. ft, of additional impervious for driveway entrance, sidewalks, etc.
<br />Total Impervious = 7,700 + 6,300 + 1,000 = 15,000 sq. ft.
<br />These proposed totals are below the 30% impervious area totals allowed forthe parcels, as well
<br />as below the building pad areas calculated in Table 1.
<br />STORMWATER MANAGEMENT
<br />A wet-bottom detention basin is proposed to be located to the west of the Guptil parcel on the
<br />Armory site to provide stormwater management for the two buildings and associated parking.
<br />This pond will be connectedto the existingpond on theAxmory sitevia a swale located along
<br />the north property line of the site. The hi� water level of the existing pond is 894 f�t, based on
<br />information found in Roseville's Su.r�`ace Water Management I�l,an. The proposed pond will
<br />consist of 4 feet of dead storage and 4 feet of live storage.
<br />The Elmer Streetparcels are proposed to be regraded to direct stormwaterinto a proposed storm
<br />sewer flowing south across Elmer Street and then west into the detention basin. The south
<br />portion of the Guptil site where the building will be located is proposedto be regraded to direct
<br />the runoff into a proposed storm sewer flowing northward into the proposed detention basin.
<br />This storm sewer is proposed to be installed S feet offthe east property line, which will partially
<br />place it within the wetland buffer. It does not appear that the stonn sewer will be located in the
<br />
|