HomeMy WebLinkAboutWPO201900007 Plan - As-built Mitigation Plan 2020-03-09Vr' STREAM BUFFER MITIGATION
MITIGATION AREA PROVIDED = 131,196 SF (3.01 AC)
MIXED VEGETATION MITIGATION AREAS
FOR EVERY 400 SQUARE —FOOT UNIT OR FRACTION THEREOF PLANT:
ONE (1) CANOPY TREE ® 1.5"-2" CALIPER
TWO (2) UNDERSTORY TREES @ 0.75"-1.5" CALIPER
THREE (3) SMALL SHRUBS OR WOODY GROUNDCOVER
MITIGATION AREA A 27,316 SF
PLANTING REQUIRED:68 CANOPY, 137 UNDERSTORY, 205 SHRUBS
TOTAL NUMBER OF PLANTS REQUIRED: 410
TOTAL NUMBER OF PLANTS PROVIDED: 412
MITIGATION AREA B 3,846 SF
PLANTING REQUIRED:10 CANOPY, 19 UNDERSTORY, 29 SHRUBS
TOTAL NUMBER OF PLANTS REQUIRED: 58
1. TOTAL NUMBER OF PLANTS PROVIDED: 58
MITIGATION AREA C 8,860 SF
PLANTING REQUIRED:22 CANOPY, 44 UNDERSTORY, 66 SHRUBS
TOTAL NUMBER OF PLANTS REQUIRED: 133
TOTAL NUMBER OF PLANTS PROVIDED: 132
SUBTOTAL MIXED VEGETATION AREA 40,022 SF
PLANTING REQUIRED: 100 CANOPY, 200 UNDERSTORY, 301 SHRUBS
TOTAL NUMBER OF PLANTS REQUIRED: 601
TOTAL NUMBER OF PLANTS PROVIDED: 602
PERENNIAL & GRASSES MITIGATION AREAS
MITIGATION
AREA
1
21,470
SF
MITIGATION
AREA
2
365
SF
MITIGATION
AREA
3
24,201
SF
MITIGATION
AREA
4
1,831
SF
MITIGATION
AREA
5
11,697
SF
MITIGATION
AREA
6
34,942
SF
SUBTOTAL PERENNIAL/GRASS AREA 94,506 SF
AREA EQUIVALENT* 66,154 SF
ADDITIONAL TREE COVER = 25,020 SF**
*PERENNIAL & GRASSY AREAS ARE 70% AS EFFECTIVE AS FORESTED RIPARIAN
BUFFERS WHEN COMPARED USING THE BENEFITS STATED IN THE VIRGINIA
DEPARTMENT OF CONSERVATION & RECREATION "RIPARIAN BUFFERS
MODIFICATION AND MITIGATION GUIDANCE MANUAL".
**THE ADDITIONAL TREE COVER REPRESENTS THE EXISTING TREE AREAS NOT
COUNTED IN THE 2012 AERIALS SURVEY. THE ADDITIONAL TREE COVER AREAS
CONTAIN THICK VEGETATION AT VARIOUS SIZES OF DEVELOPMENT FROM 1' HT.
TO OVER 15' HT. THE VEGETATION IN THESE AREAS WAS TO SMALL TO
APPEAR ON THE AERIAL SURVEY IN 2012, BUT HAS REMAINED UNDISTURBED
AND HAVE BEEN ALLOWED TO GROW OVER THE INTERIM 7 YEAR PERIOD. THE
EXTENT OF THE ADDITIONAL COVER HAS BEEN VERIFIED IN THE FIELD AND VIA
CURRENT SATELLITE PHOTOS AVAILABLE THROUGH GOGGLE EARTH.
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LOT 16 1 LOT 17
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STREAM BUFFER MITIGATION AREA
W/ PERENNIALS/GRASSES
ADDITIONAL TREE COVER
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