21-101517- SITE PLANa
a�
LL
PLOT PLAN Qj
N.T.S.
KEY NOTES
101 - BUILDING TO BE PREPARED
102 - AREA OF WORK
SITE PLAN NOTES
1. TEMPORARY EROSION IS NOT SHOWN, NO GRADING OR EXCAVATION WILL OCCUR DURING
CONSTRUCTION.
2. ALL STORM WATER RUNOFF WILL MATCH EXISTING CONDITIONS.
3. NO TREES ARE TO BE REMOVED.
4. CONTRACTOR TO VERIFY ALL DIMENSIONS.
5. CONTRACTOR TO VERIFY ALL EXITING UTILITIES.
6. DURING CONSTRUCTION, STORM WATER RUNNFF SHALL BE MANAGED USING ONE OF THE
FOLLOWING METHODS TO PREVENT FLOODING AND SOIL EROSION TOWARD THE ADJACENT
PROPERTY:
A. PROVIDE TEMPORARY RETENTION BASINS
B. FILTER STORM WATER AND ROUTE TO PUBLIC DRAINAGE SYSTEM
C. COMPLY WITH LOCAL STORM WATER ORDINANCES.
D. USE OTHER BEST MANAGEMENT PRACTICES (BMP'S) INCLUDING,
BUT NOT LIMITED TO:
a. SILT FENCING
b. MULCH
c. EROSION CONTROL MATTING
d. STABILIZED ENTRANCES
e. FIBER ROLLS/WATTLES
7. SURFACE DRAINAGE: PROVIDE POSITIVE DRAINAGE AWAY FROM BUILDING EXTERIOR. GRADE
SHALL FALL A MINIMUM OF 6 INCHES WITHIN THE FIRST 10 FEET PER IRC SECTION R401.3.
OTHER METHODS USED TO MANAGE AND PREVENT SURFACE WATER FROM ENTERING THE
BUILDING INCLUDE, BUT NOT LIMITED TO, THE FOLLOWING:
A. SWALES
B. WATER COLLECTION AND DISPOSAL SYSTEM
C. FRENCH DRAINS
D. WATER RETENTION GARDENS
E. CHANNEL RAIN GUTTER DISCHARGE AWAY FROM BUILDING
BEST MANAGEMENT PRACTICES
DURING CONSTRUCTION, TEMPORARY BMPS SHALL BE USED TO PREVENT OR MINIMIZE
EROSION AND SEDIMENTATION BEFORE AND DURING CONSTRUCTION AND UNTIL PERMANENT
BMPS HAVE BEEN INSTALLED. TEMPORARY BMPS SHALL BE INSTALLED BEFORE THE START OF
CONSTRUCTION AND SHALL REMAIN IN PLACE UNTIL ALL CONSTRUCTION ACTIVITY IS
COMPLETED OR PERMANENT BMPS ARE INSTALLED.
TEMPORARY BMPS SHALL BE SIZED TO CONTROL RUOOFF FROM A 20 YR/1 HOUR STORM,
WHICH IS APPROXIMATELY 1-INCH OF WATER IN ONE HOUR.
THE FOLLOWING BMPS SHOULD BE IMPLEMENTED BEFORE CONSTRUCTION BEGINS:
A. BOUNDARY FENCING - CLEARLY DESIGNATE THE LIMITS OF
CLEARING AND GRADING AND DEFINE AREAS TO BE PROTECTED
B. TRAFFIC CONTROL - AREAS WHERE CONSTRUCTION TRAFFIC CAN
TRAVEL SHOULD BE CLEARLY MARKED WITH FLAGGING, MARKERS
AND/OR TEMPORARY FENCING.
C. STABILIZED CONSTRUCTION ENTRANCE - CONSISTS OF A PAD OF
CRUSHED STONE OR GRAVEL LOCATED AT ANY POINT WHERE
CONSTRUCTION TRAFFIC ENTERS OR LEAVES THE SITE. PAD
SHOULD CONSIST OF 1 TO 3 INCH DIAMETER CLEAN GRAVEL AT
LEAST 8 INCHES DEEP.
D. DUST CONTROL - MOISTEN SOIL TO A DEPTH OF 2 TO 3 INCHES,
MULCH AREA WITH GRAVEL, OR ESTABLISH A VEGETATIVE COVER
E. PROTECTION OF TREES AND OTHER VEGETATION - INSTALL
TEMPORARY FENCING OR OTHER BARRIERS ALONG THE DRIPLINE
OF TREES AND OTHER VEGETATION'S BRANCHES TO PREVENT
DISTURBANCE
4. TEMPORARY SEDIMENT BARRIERS -ARE STRUCTURES USED TO SLOW RUOOFF AND TRAP
SMALL AMOUNTS OF SEDIMENT TEMPORARILY. TEMPORARY SEDIMENT BARRIERS SHALL BE
INSTALLED AROUND THE DOWNHILL PERIMETER OF DISTURBED SOIL AREAS.
A. FIBER ROLL BARRIERS (ALSO CALLED SEDIMENT LOGS) - SHOULD
BE INSTALLED PERPENDICULAR TO THE EXPOSED SLOPE, KEYED
INTO A CONCAVE TRENCH AT LEAST THREE INCHES DEEP, AND
STAKED SECURELY ON BOTH SIDES OF THE ROLL EVERY 12 INCHES.
B. FILTER FENCE - SHOULD BE KEYED INTO THE GROUND AT LEAST 6
INCHES DEEP, BACKFILLED WITH DIRT OR GRAVEL, AND STAKED
ALONG THE CONTOUR LINE BELOW THE DISTURBED SLOPE. THE
ENDS OF THE FENCE SHOULD BE INSTALLED WITH A TURN UPHILL
TO CREATE A "J" SHAPE THAT WILL POND WATER.
C. DROP INLET BARRIERS - TEMPORARY DEVICES INCLUDING GRAVEL
BAGS AND DROP INLET FILTERS IN AREAS WITH A CURB AND DROP
INLET SYSTEM ONLY.
5. TEMPORARY EROSION CONTROL -BARE SOILS EXPOSED FOR ANY AMOUNT OF TIME MUST BE
STABILIZED BY ONE OF MORE OF THE FOLLOWING BMPS:
A. PINE NEEDLE MULCH.
B. EROSION CONTROL BLANKETS OR GEOTEXTILES.
C. CHEMICAL MULCHES AND TECKIFIERS.
D. HYDROMULCH AND HYDROSEED.
6. SPOIL PILES THAT REMAIN ONSITE ONE DAY OR LONGER NEED TO BE SURROUNDED BY
PROPERLY INSTALLED TEMPORARY SEDIMENT BARRIERS (FIBER ROLLS OR FILTER FENCE) AND
MUST BE COMPLETELY COVERED BY AN IMPERMEABLE FABRIC. THE IMPERMEABLE FABRIC
MUST ALSO BE PLACED ON SPOIL PILES WHENEVER A STORM IS IMPENDING.
NOTE: A LAND SURVEY WAS NOT PERFORMED FOR THIS
RECONSTRUCTION PROJECT. PROPERTY LINE INFORMATION
SHOWN IS FROM EXISTING COUNTY ASSESSOR'S MAPS. ALL
DIMENSOBSERVED IONS FIEOLD CONDT IONS AND HAVE NOTY LINES ARE TE IFIE6
BY MEANS OF SURVEY.
CITY OF FEDERAL WAY
COMMUNITY DEVELOPMENT
W
C>
2
F--
w
w
O
CD
w
O
Cn ti
0
U)
w
LLuCID
(�
z O
a
o WI_�
cn m (n Q O
Jc �:
p W -A C.
Y> Jrn
Z C,W H N
o wowo
2
0cfl(AN
z
s
-``"
10695
V J
73
D
z_
0
2i�co
OWo
0 ry Q z
z�� Q
OU J
Q ��- n
ry cy) 3: LLJ
D � )
OV^Q U)
U o
Q N W
LLI
U) W
W
r
U
a�
F_
m az
ai
'o �
n` W
O
U
(n �
Z o
_O
U)
W
ry
(1)
Q
DATE
2/11 /2021
DRAWN
KLM
JOB NO
COB51043.00
SHEET
AO.2