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AVERAGE GRADE HEIGHT CALCS.
262.3 NW CORNER
262.6 NE CORNER
271.8 SW CORNER
268.0 SE CORNER
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266.175 AVERAGE GRADE
285.53 PROPOSED RIDGE ELEV.
19.36' PROPOSED RIDGE HT.
FROM AVE. GRADE �yl15
A
MAX ALLOWABLE HEIGHT 25'
291.175'
IMPERVIOUS AREA CALCULATIONS 2'22'10
EXT'G ROOF (c. 1959) 2404 SF
EXT'G DRIVEWAY (c. 1959) 2384 SF
EXT'G WALK & PORCH (c.1959) 250 SF -------
EXT'G SHEDS (c. 1960) 160 SIF
,EXT'G SPORT COURT (c. 2006) 1832 SF
TOT IMPERVIOUS 7030 SF
SITE A 27086 SF
EXT'G NIMRVIOUS AREA 26.0%
NEW PATIO 231 SF
ADDITION ROOFS 570 SF "Y
NEW TOTAL IMPERVIO, 7831 SF t
SITE AREA 27086 SF
PROPOSED IMPERVIOUS AR'28.9
MAX. ALLOW. IMPERVIOUS 35%
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POST 1977 IMPERVIOUS AREA 2633 SF ,/0" f" l-A,""v'Mvz
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TOTAL ROOF AREA: 2974 SF w
ROOF TO EXISTING DRAIN 1 393 SF
ROOF TO NEW STORM SYSTEM: 2581 SF s
NEW PATIO TO YARD DRAIN: 231 SF
TOTAL AREA TO STORM
DETENTION SYSTEM, 2812 SF
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MERRIR LENTZ AR011TEICT
1;- "1 11 1, ,:,,1 111-11-
1800 1361h Place NE - Suite 100 Bellevue, VIA 98005
t.42S.747.3177 (.425.747.7149
Ed,
SH'E PLAN 2!23/10
Zacharia-Samuels Addition i11=30'-0° (at I I x 17)
Edmonds. WA qk-qITF