HomeMy WebLinkAboutApproved drainage plan108T H P L A C E S E
NEW 1ST FLOOR ADDITION
1,039 SF (HATCHED)
EXISTING STRUCTURE
TO REMAIN
(e) ds
(e) ds
(e) ds
(e) ds
(e) ds(n) ds
(n) ds
(n) ds
TEMP SOIL STOCKPILE
WITH 6 MIL VISQUEEN COVER
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxSILT FENCE
STABILIZED CONSTRUCTION ENTRANCE
(e) ds
EXIST. DOWNSPOUT
DRAIN PIPE
EXIST. DOWNSPOUT
DRAIN PIPE
NEW DOWNSPOUT
DRAIN PIPE
EXIST. CB
EXIST. DRAIN PIPE
Scale:
Project #:
Date:
Drawn by:
Checked by:LEWATE RESIDENCEASFAW LEWATE18303 108TH PLACE SERENTON, WA 98055PARCEL #: 508970-03602022-111
JUN.01.2023
Dan Garvida
Asfaw Lewate
AS NOTED
REVISIONS:
GARVIDA DESIGN
GROUP, LLC
Dan Garvida
206.590.1232
Dan.GarvidaDesign@outlook.com
ADDITION & INTERIOR ALTERATIONOct. 05, 2023 1
Jan. 02, 2024 2
Feb. 14, 2024 2DRAINAGE AND TESC PLANC-200
DISTURBED
AREA FLOWSIMPLIFIED SITE DRAINAGE PLAN AND FLOW CONTROL BMP PLAN
DEFINITIONS:
SMALL PROJECT STORMWATER POLLUTION PREVENTION PLAN (SWPPP)
THIS PLAN IS REQUIRED FOR ALL PROJECTS WITH GREATER THAN 750 SQUARE FEET BUT
LESS THAN 7,000 SF OF LAND DISTURBING ACTIVITIES.
A FIRST GROUND DISTURBANCE INSPECTION IS REQUIRED PRIOR TO START OF WORK ON ALL SITES WITH
LAND DISTURBING ACTIVITY. SEE ESC INSPECTION PROCESS BELOW.
TEMPORARY AND PERMANENT BEST MANAGEMENT PRACTICES (BMPS) SHALL BE USED TO
ACCOMPLISH THE FOLLOWING MINIMUM REQUIREMENTS. ADDITIONAL BMPS ARE REQUIRED
WHEN MINIMUM CONTROLS ARE NOT SUFFICIENT TO PREVENT EROSION OR TRANSPORT OF
SEDIMENT OR OTHER POLLUTANTS FROM THE SITE.
-MARK CLEARING LIMITS
-DELINEATE ENVIRONMENTALLY CRITICAL AREAS
-RETAIN TOP LAYER AND NATIVE VEGETATION
-ESTABLISH CONSTRUCTION ACCESS
-PROTECT DOWNSTREAM PROPERTIES AND RECEIVING WATERS
-PREVENT EROSION AND SEDIMENT TRANSPORT FROM THE SITE
-STABILIZE SOILS
-PROTECT SLOPES
-PROTECT STORM DRAINS
-STABILIZE CHANNEL AND OUTLETS
-CONTROL POLLUTANTS
-CONTROL DEWATERING
-MAINTAIN AND INSPECT BMPS
-EXECUTE CONSTRUCTION STORMWATER CONTROL PLAN
-MINIMIZE OPEN TRENCHES
-PHASE THE PROJECT
-INSTALL PERMANENT FLOW CONTROL AND WATER QUALITY FACILITIES
•TOTAL SITE AREA: SIZE OF THE LOT, EXPRESSED IN SQUARE FEET.
•IMPERVIOUS AREA (Ai): THE TOTAL SQUARE FOOTAGE OF NEW AND/OR REPLACED
IMPERVIOUS AREA. IMPERVIOUS AREAS ARE THOSE THAT WILL NOT BE VEGETATED SUCH
AS BUILDING ROOF AREA, DRIVEWAYS, WALKWAYS, PATIOS, ETC. LABEL THESE AREAS
AS (Ai) ON THE PLAN SHEET AND NOTE THE TOTAL SQUARE FOOTAGE ON THE
COMPOST CALCULATION WORKSHEET.
•NON-DISTURBED AREA (ND): VEGETATED AREAS THAT WILL NOT BE SUBJECT TO
LAND DISTURBING ACTIVITY (SEE D) DO NOT REQUIRE SOIL AMENDMENT IF THEY ARE
FENCED AND CONTINUOUSLY PROTECTED THROUGHOUT CONSTRUCTION. THE FENCING
MUST BE IN PLACE AT THE FIRST GROUND DISTURBANCE INSPECTION. THIS WILL BE
MONITORED BY THE DPD SITE INSPECTOR. NO DISTURBANCE, INCLUDING VEHICLE
TRAFFIC OR MATERIAL STORAGE, IS ALLOWED IN THESE AREAS UNTIL FINAL INSPECTION.
LABEL THESE AREAS AS (ND) ON THE PLAN SHEET AND NOTE THE TOTAL SQUARE
FOOTAGE ON THE COMPOST CALCULATION WORKSHEET.
•OTHER (O): OTHER REPRESENTS EXISTING IMPERVIOUS SURFACE TO REMAIN, DRAINAGE
FACILITIES, ENGINEERED STRUCTURAL FILL AREAS, RAIN GARDENS, ETC. LABEL THESE
AREAS AS (O) ON THE PLAN SHEET AND NOTE THE TOTAL SQUARE FOOTAGE ON THE
COMPOST CALCULATION WORKSHEET.
•DISTURBED AREA (D): AREA (TURF AND LANDSCAPE) THAT MUST BE AMENDED WITH
A MINIMUM OF 2 INCHES OF COMPOST AND BE LOOSENED SO IT WILL PROBE TO A
DEPTH OF 12 INCHES PRIOR TO SITE FINAL INSPECTION. THIS INCLUDES AREAS
IMPACTED BY CLEARING AND GRADING, STOCKPILING, SITE ACCESS, PATHWAYS AND
MATERIALS OR EQUIPMENT STORAGE. LABEL THESE AREAS AS (D) ON THE PLAN
SHEET AND NOTE THE TOTAL SQUARE FOOTAGE ON THE COMPOST CALCULATION
WORKSHEET.
NOTE: THIS PLAN IDENTIFIES THE MINIMUM MEASURES REQUIRED; ADDITIONAL MEASURES MAY BE REQUIRED BASED ON CONSTRUCTION METHODS AND ACTUAL AREA OF DISTURBANCE.
COMPOST SOCK
TREE & VEGETATION PROTECTION
CS
1.
2.3010 ' -0 "3.
2" X 2" X 3'
WOODEN
STAKE
1' - 0"MIN.3" MIN.4" MAX.CONTOUR LINE (TYP.)
10' -0" @ 30^ ANGLE
EACH
END TO PREVENT FLOW
AROUND (TYP.)
L E N GT H VAR IES
2"X 2"X 3' WOODEN STAKE,
SPACED EVERY 3' O.C. (TYP.)
COMPOST
SOCK
~ SEE NOTE 1
PROTECTE
D
AREA
DISTURBE
D
AREA
EXCESS SOCK
MATERIAL,
DRAWN
IN AND TIED
OFF
AT STAKE
(TYP.)
SPACING VARIES(TYP.) SEE NOTE 3
COMPOST SOCK SHALL BE IN ACCORDANCE WITHSTANDARD SPECIFICATION 9.14.4(9). COMPOST
SOCK SHALL BE A MINIMUM OF10" IN DIAMETEROR SIZED TO SUIT CONDITIONS AS SPECIFIED BY
THE ENGINEER.
ALWAYS INSTALL COMPOST SOCK
PERPENDICULAR
TO SLOPE AND ALONG CONTOUR LINES.
REMOVE SEDIMENT FROM THE UP SLOPE SIDE OF
THE COMPOST SOCK WHEN ACCUMULATION HASREACHED 1/2 OF THE EFFECTIVE HEIGHT OF THECOMPOST SOCK.
MAY BE USED IN PLACE OF FILTER FENCE FOR
PERMITER CONTROL.
PLAN VIEW
SECTION
DETAIL
(SHOWN AS SLOPE PROTECTION)
4.
VEG
TREE & VEGETATION FENCING AROUND
ENTIRE DRIP LINE ON PERMIT SITE.
ALTERNATIVE TREE PROTECTION, IF
APPROVED BY DPD, AS SHOWN ON SITE PLAN4'-0"MIN.MUST BE INSTALLED PRIOR TO DEMOLITION
TREE PROTECTION FENCING
1.
OR GROUND DISTURBANCE
2.KEPT IN PLACE FOR THE DURATION
OF CONSTRUCTION
3.NO SOIL DISTURBANCE OR ACTIVITY
ALLOWED WITHIN FENCED AREA, SUCH
AS MATERIAL STORAGE/STOCKPILING,
PARKING, EXCAVATION, DUMPING, OR WASHING
CANOPY DRIP
LINE
DEFINES TREE &
VEGETATION
PROTECTION
AREA
ORANGE MESH OR
CHAIN LINK
FENCE
4.MODIFICATIONS OF THESE REQUIREMENTS
BY APPROVAL OF DPD PLANNER ONLY
5.IF ROOTS GREATER THAN 2 INCH FOUND
OUTSIDE OF FENCING, PROTECT BY HAND
EXCAVATION AND, IF NECESSARY, CUT
CLEANLY AND KEEP MOIST
MINIMIZE CONSTRUCTION ZONE
VEGETATION PROTECTION
1.
2.PROTECT VEGETATION OUTSIDE CONSTRUCTION
ZONE WITH FENCING AS SHOWN
3.USE 3 INCHES OR DEEPER WOOD CHIP
MULCH OUTSIDE FENCED AREAS TO
PROTECT FEEDER ROOTS
6.USE 3 INCHES OR DEEPER WOOD CHIP
MULCH OUTSIDE FENCED AREAS TO
PROTECT FEEDER ROOTS
LINK TO MORE TREE PROTECTION INFORMATION:
SYMBOL:
SYMBOL:
A
A
DRAINAGE ASSESSMENT:
THIS PROJECT CONSIST OF ADDING 1,187 SF OF 1ST FLOOR NEW CONDITIONED LIVING SPACE TOWARDS THE
REAR OF THE EXISTING SFR. 1,032 SF OF NEW IMPERVIOUS SURFACE (ROOF) WILL BE ADDED. NEW
DOWNSPOUTS WILL BE CONNECTED TO EXISTING DRAINAGE SYSTEM ON SITE.
EROSION AND SEDIMENT CONTROL (ESC) INSPECTION NOTES:
At least three ESC inspections are required. The ESC inspections will be performed by city staffs.
The inspectors will verify if the proper installation and maintenance have been made.
.
* ESC INSPECTION 1: PRIOR TO CLEARING AND GRADING ACTIVITIES
-THE APPLICANT CALL IN AND COORDINATES WITH AN ESC INSPECTOR. THE ESC INSPECTOR
WILL OUTLINE THE EROSION AND SEDIMENT CONTROL MEASURES AND PROCESS
.
* ESC INSPECTION 2: DURING CONSTRUCTION
-THE APPLICANT CONTACTS THE ESC INSPECTOR FOR A SITE INSPECTION AFTER INSTALLING
SELECTED ESC BMPs. THE INSPECTOR CHECKS THAT ALL THE BMPs ARE INSTALLED
PROPERLY. NO CLEARING AND GRADING ACTIVITIES SHALL TAKE PLACE PRIOR TO AN
APPROVAL BY THE INSPECTOR. THE INSPECTOR MAY CONDUCT AND MONITOR THE SELECTED
TOOLS DURING CONSTRUCTION.
.
* ESC INSPECTION 3: AFTER CONSTRUCTION
-THE APPLICANT CONTACTS THE INSPECTOR FOR A SITE INSPECTION AFTER COMPLETING THE
CONSTRUCTION PROJECT. THE INSPECTOR VERIFIES THAT ANY DISTURBED SOILS ON THE SITE
ARE STABILIZED PRIOR TO OCCUPANCY
SCALE: 1" = 10'-0"1 SITE PLAN - DRAINAGE
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