5 Village Green Campus Tree Retention Plan East L2.1_ LEGEND
EXISTING CONIFER & DECIDUOUS TREE >6" DBH
_ m a TREE TO BE REMOVED
vf. SIZE OF TREE AT DBH (DOUGLAS FIR, 17" DBH)
#116 TREE NUMBER TO BE REMOVED
i LIMIT OF WORK
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5' ` �`� �a P- i NOTES -TREE & VEGETATION RETENTION /
Minimum tree density for Parcel East RS 7.2 is 25 tree units per acre.
Subject Parcel East size = 4.31 acres .�
25 tree units x 4.31 acres = 108 tree units required
556 - Proposed Tree Units to be removed
1 (� 124 - Remaining Tree Units after removal of proposed trees
I 39 - Minimum Additional Tree Units
24 - Deciduous Trees (medium to large canopy species, 450 sf - 1250 sf)
" 15 - Evergreen Trees medium to large canopy species, 450 sf - 1250 sf (y) 1—
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gar 163 -TOTAL TREE UNITS proposed at completion of project a. 00
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GENERAL TREE RETENTION NOTES .J
f �f 1. No clearing shall be allowed on a proposed development site until the tree retention and landscape plans have LID l4
F�.. been approved by the city of Federal Way.
I 1 2. A disturbance area shall be established for each tree to be protected. The no disturbance zone shall be equal
—1 to the critical root zone which is defined as 12 inches radius for every one inch of tree diameter measured at
— four and one-half feet above ground. Any other no disturbance area proposed by the applicant shall be
determined by a qualified arborist and subject to review and approval by the director.
The no disturbance zone shall be identified during the construction stage with:
r _ (a) A temporary five-foot chain -link fence; and
(b) Tree protection signage attached to the fence which reads "TREE PROTECTION FENCE — NO soil
disturbance, parking, storage, dumping,or burning of materials is allowed within the Tree Protection
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f Fence." E,
3. No soil disturbance, parking, storage, dumping, burning of materials, impervious surfaces, fill, excavation, or
storage of construction materials shall be permitted within the no disturbance area. ++ (Y)
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4. If the grade level around the tree is to be raised by more than one foot; a rack well shall be constructed. The ,C N
inside diameter of the rock well shall be equal to the diameter of the tree trunk plus 10 feet. Proper drainage, L
\ g and irrigation if necessary, shall be provided in all rock wells: O
5. The grade level shall not be lowered within the larger of the drip line of the tree(s) or the critical root zone of � (n U
the trees}.
1 6. No trenching is allowed in any critical tree root zone areas. tD > co G
7. No installation of any; impervious surfaces is allowed in critical root zones. Where road or sidewalk surfaces % Q co 0
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are needed within root zones, unmortared;porous:pa pavers or flagstone (rather than concrete or asphalt} -_ > J
may be used. Boardwalks orbrid inmay span root zones without harmingthe tree roots. O
(10 8. Tree protection areas (i.e., critical root zone) must be prepared to better withstand the stresses of the {p
construction phase b , if necessary, fertilizing, g, g
p y ry, g, pruning, and mulching around them well in advance of J d E Q M
- i �` _L beginning any construction activities. t{) U
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r I '\ l;ry '�, ,� •;, ; -V ("" 9. Alternative protection methods may be used rf accepted by the director to provide equal or greater tree � � � � 0
protection. J r 04
1& Encroachment into the no disturbance area may be allowed where the director determines encroachment
would not be detrimental to the health of the tree.
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NOTES: G �
j i ORIFUNE=x FENCINGIROOT PROTECTION
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1. PROVIDE CHAIN LINK FENCING AND MAINTAIN 3' OUTSIDE a
i•= - _--- - --' " - .S {w " 'ai i ���, ro OF TREE DRIPLINE. 4
TRENCHING AND EXCAVATION �
ZONE A - CRITICAL ROOT ZONE
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7. NO DISTURBANCE ALLOWED WITHOUT SITE INSPECTION
AND APPROVAL OF METHODS TO MINIMIZE ROOT DAMAGE.
A�' ' 2. SEVERANCE OF ROOTS LARGER THAT 2" IN DIAMETER
`-�. REQUIRES APPROVAL FROM COUNTY.
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� 3. TUNNELING IS REQUIRED TO INSTALL LINE 3' OR DEEPER
BELOW GRADE.
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t. OPERATION OF HEAVY EQUIPMENT STOCKPILING _ � O
OF MATERIALS IS NOT PERMITTED:. ,}.i N
2. SURFACE PROTECTION MEASURES REQUIRING
, > "' - r" •": .....J , + TRENCHING ALLOWED AS FOLLOWS:.r+w��
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�� o I f A. EXCAVATION BY HAND OR WITH HAND OPERATED
T 1 ,, w. ,,, I I I TRENCHER MAY REQUIRED
-� g I 6 o n ZONE BDW.=X li.
'" '' �- i � `R � B. LIMIT TRENCHING WIDTH, DO NOT DISTURB ZONE A.
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ZONE c i MAINTAIN 213 0R MORE OF ZONE 6 IN UNDISTURBED (�
��� ��.> ( ,., ! I (c•. oa.=sx CONDITION. �::.Q►
3. TUNNELING IS REQUIRED TO INSTALL. LINE TOR DEEPER �� L
BELOW GRADE.
ZONE C - FEEDER ROOT ZONE
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'. t. OPERATION OF HEAVY EQUIPMENT AND/OR STOCKPILING
OF MATERIALS IS NOT. PERMITTED.
2. TRENCHING WITH HEAVY EQUIPMENT ALLOWED AS �"
7 FOLLOWS:
A.MINIMIZE TRENCH WIDTH. �
B.LIMI7 TRENCHING WIDTH. DO NOT DISTURB ZONE A.
MAINTAIN 213 OR MORE OF ZONE IN UNDISTURBED
CONDITION.
SURFACE PROTECTION MEASURES
t. 6.8" DEPTH OF WOOD CHIP MULCH. fl z
2.3/4" THICK PLYWOOD SHEETS OR STEEL PLATES. �m
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r 1 TREE PROTECTION DETAIL m
� _ �... _ _ SCALE: NTs
_-= 2ND AVE SW CC
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0 15' 30' 60' 120' P Z s :J
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Graphic Scale: 1" = 30'-Of a W o o
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