20040002.pdfDATE RECEIVED
CITY OF EDMONDS
CONSTRUCTION PERMIT APPLICATION
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PRV REQUIRED
YES 0 NO 13
REMARKS I
OWNER/CONTRACTOR RESPONSIBLE FOR EROSION CONTROL/DRAINAGE
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THIS PERMIT AUTHORIZES ONLY THE WORK NOTED. THIS PERMIT COVERS WORK TO
t BE DONE ON PRIVATE PROPERTY ONLY. ANY CONSTRUCTION ON THE PUBLIC
DOMAIN (CURBS, SIDEWALKS, DRIVEWAYS, MARQUEES, ETC.) WILL REQUIRE
SEPARATE PERMISSION.
W PERMIT APPLICATION: 160 DAYS
PERMIT LIMIT. I YEAR - PROVIDED WORK IS STARTED WITHIN 180 DAYS
SEE BACK OF PINK PERMIT FOR MORE INFORMATION
U) 'APPLICANT, ON BEHALF OF HIS OR HER SPOUSE, HEIRS. ASSIGNS AND SUCCESORS
IN INTEREST, AGREES TO INDEMNIFY. DEFEND AND HOLD HARMLESS THE CITY OF
EDMONDS. WASHINGTON. ITS OFFICIALS, EMPLOYEES. AND AGENTS FROM ANY AND
ALL CLAIMS FOR DAMAGES OF WHATEVER NATURE. ARISING DIRECTLY OR INDIREC I LY
x FROM THE ISSUANCE OF THIS PERMIT, ISSUANCE OF THIS PERMIT SHALL NOT 13E
5 DEEMED TO MODIFY, WAIVE OR REDUCE ANY REQUIREMENTOF ANY CITY ORDINANCE
0 NOR LIMIT IN ANY WAY THE CITYS ABILITY TO ENFORCE ANY ORDINANCE PROVISION
I HEREBY ACKNOWLEDGE THAT I HAVE READ THIS APPLICATION; THAT THE INFORMATION
GIVEN IS CORRECT; AND THAT I AM THE OWNER, OR THE DULY AUTHORIZED AGENT OF
THE OWNER. I AGREE TO COMPLY WITH CITY AND STATE LAWS REGULATING CONSTRUC-
TION; AND IN DOING THE WORK AUTHORIZED THEREBY, NO PERSON WILL BE EMPLOYED
IN VIOLATION OF THE LABOR CODE OF THE STATE OF WASHINGTON RELATING TO
WORKMEN'S COMPENSATION INSURANCE AND RCW 18.27.
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Description FEE
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Engr. Inspection
Fire Review
Fire inspection
Landscapelnsp-
Recording Fee
CALL
FOR INSPECTION
(425)
771-0220
113
ATTENTION CA 1 1100
IT IS UNLAWFUL TO USE OR OCCUPY A BUILDING OR STRUCTURE UNTIL
A FINAL INSPECTION HAS BEEN MADE AND APPROVAL OR A CERTIFI- 0 ICIN F'rLE YELLOW . IdSPECTOR
CATE OF OCCUPANCY HAS BEEN GRANTED. UBC SECTION 109 IN' OWNER GOLD -ASSESSOR
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Description FEE
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City Surcharge
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Total Anit. Due
Receipt # __7)-)j?7
APPLICATION APPROVAL
I his application is not a perinit until signed by the
Building Official or his/her Deputy. and Fees are paid, and
recuipt is acknowledged in space provided
OFFICIALS SIGNXTURE DAT E
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Height Calculation/Grading Verification Worksheet
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Address: c�-30 7 9�cl DIX k LIXY71-K Permit #: J' co-r-1 -- ow
Date: fs
A. Datum Point: P,,j t.
B. Datum Point Elevation: (p &, 5-7
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C. Average Grade: 0
(For Grading Verification Only)
1. Lowest Footing Elevation (shown on grading plan):
2. Actual Footing Elevation:
-7 3. Maximum Elevation Allowed. (average grade) + 25'
4. Reference Point Elevation Shot to House:
6�j,��7 (datum elevation) +S 'to Z (grade to transit level line shot to house)
6. Measurements from line shot onto house to roof ridge:
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(actual) is greaterQ =Iessth'IhC�G (allowed); therefore the house is/
is not over the height requirement per ECDC 16.20.30 requirements
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ENGINEERING REPORT
and
INFILTRATION TRENCH DESIGN
FOR
Tom R. Belt Homes
809 Driftwood Lane
Edmonds, Washington
October 2003
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Prepared by:
Robert L. Long
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19400 33rd Avenue W. Suite 200
Lynnwood, Washington 98036
LSA No. 4421
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Tom R. Belt Homes
809 Driftwood Lane
Introduction
This summary report provides site design information for the proposed lot development for
Tom R. Belt Homes. It includes storm drainage(infiltration) and grading analysis to support
to the construction of a single family residence. The property is located at 809 Driftwood
Lane in the southwest 114 of Section 13, T 27 N, R 3 E, W.M.
ApplicantlOwner Site Address:
Tom R. Belt Homes 809 Driftwood Lane
PO Box 314 Edmonds, WA 98020
Edmonds, WA 98020
(425) 774-1720 Tax Parcel Number.* 270313-003-019-00
TABLE OF CONTENTS
NUMBEROF
SECTION CONTENTS PAGES _
A.
Project Summary ........................................... 2
B.
Site Plan ................................................. I
C.
Parcel (Vicinity) Map ........................................ 1
D.
Site Photos ............................................... 1
E.
Infiltration Sizing Calculations ................................. 1
F.
Percolation Rate Calculations ................................. 2
G.
Soils Map ................................................. 2
Lovell-Sauerland and Associates
October 2003
Tom R. Belt Homes
LSA No.4421
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Site Develop'llnent Summary
VV1 Drainage Improvement Design:
A new proposed residence will replace an existing residence on an approximately 16,100 sf lot.
The existing house and carport are proposed to be razed and replaced with a single family
residence with an attached garage (in same location as existing house and carport). To mitigate
the redevelopment of the site, an infiltration system will be installed to control the drainage runoff
from the impervious surfaces. All on -site impervious surfaces are proposed to be collected and
routed to the on -site infiltration system. A 6" overflow pipe will provide a discharge outlet if the
infiltration system reaches capacity (to prevent flooding). Listed below is a summary of the
infiltration trench design.
Infiltration Trench Design:
The on -site infiltration trench is to be constructed per the City of Edmonds' standard practices
(currently the 1990 King County manual, section 4.5). The length of the trench is dependant upon
the measured infiltration rate of the native soils and the collection area conveyed to the individual
trench.
SCS soil survey designates the area soils as an Everett (918- type A) soil. SCS defines the
Everett as a very deep, somewhat excessively drained soils located on terraces and outwash
plains. Permeability of this Everett soil is rapid, available water capacity is low, effective rooting
depth is 60 inches or more, runoff is slow, and the hazard of water erosion is slight.
Two test pits, in the area of the proposed infiltration trench were explored on -site. The soils found
in the pit, and surround exposed areas was medium sand. Thus, confirming the SCS description
of an Everett (#18- type A) soil. Two test pit percolation trials were completed on the soil to
determine the on -site percolation rate (see attached calculations).
Using the City's design criteria (currently the 1990 King County manual, section 4.5), a required
trench length was computed. A length of 70 feet of 5 feet deep, 4 feet wide trench was
determined to fully infiltrate the 100-year design storm (P100). See attached calculations.
Site Area Summary:
Total Site Area = 16,099 sf
Existing Impervious = 2,400 sf
Proposed Impervious = 6,435 sf
House+garage = 2,970 sf
Driveway = 2,690 sf
Deck, Patio, & Walkway = 775
Lovell-Sauerland and Associates Tom H. beit tiornes
October 2003 =W-NU LSA No. 4421
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Grading and Erosion Control:
This project will require grading to raze the existing house and construct the proposed
single family resident development. Standard erosion control measures are proposed to
be used during construction. The primary erosion and sediment control BMP during
construction will be proper soil stabilization methods. Exposed soils shall be stabilized by
application of effective bmp's that protect the soil from the erosive forces of raindrops,
flowing water, and wind. Applicable practices include, but not limited to, temporary and
permanent seeding, sodding, mulching, plastic covering, erosion control fabrics, matting,
soil application of polyacrylamide (pam) , the early application of gravel base on areas to
be paved, and dust control. The contractor shall select a soil stabilization method best
suited for the particular situation. Stock piles must be stabilized and protected with
sediment trapping measures. In addition, site containment of exposed soils shall be
sustained by using silt fence barriers along the down -slope- boundaries of the site's
disturbance areas. See the site development plan for details.
Estimated -grading calculations: Minimal project grading is expected due to the relatively
flat site. The following grading quantity estimations were calculated using a computer
modeling program within the AutoCAD computer drawing. The calculations are
approximate. The quantities listed are for the permitting process only and should not be
considered precise amounts for bidding purposes. The estimated grading quantities are:
Approximate Fill: 50 CY
Approximate Cut: 50 CY
Conclusion: Included in the site development construction plans are specific grading and
drainage improvement notes and details. With proper installation, maintenance and
inspections of the proposed construction the project should have minimal impact to the
surrounding environment.
Lovell- Sa uerland and Associates
October 2003
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Tom R. Belt Homes
LSA No.4421
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CITY OF EDMONDS
SITE DEVELOPMENT PLAN
FOR
THOMAS R. BELT
IN SEI/4,SWI/4 OF SECTION 13,7.27 N.,R.3 E.,W.M.
CITY OF EDMONDS
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INFILTRATION SIZING CALCULATIONS:
The infiltration trench was sized using the current City of Edmonds design criteria
(King County 1990, section 4.5). An on -site soil test pit was evaluated to determine
the design infiltration rates (see attached percolation calculations). Per the design
standards the maximum rate of sand will be used (8.27 in/hr). The following
calculations size the proposed infiltration trench.
Required Trench:
L = [(0.054 x P100 X AR) / (10 X lm)] / (trench surface area)
-L = ? (length of trench)
-P100= 3.0 in (100-year precipitation)
-AR= 6,435 sf (contributing impervious surface area)
-Im = 0.1378 in/min (8.27 in/hr per rate per soils)
-Trench Surface area = 14 ft. (see diagram below)
L = [(0.054 x 3.0 X 6,435) / (10 x 0. 1378)]
L = 54.0
Design Trench Length 70 feet
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October 2003
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LSA No.4421
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PERCOLATION RATE CALCULATIONS:
Two soil investigation test holes were explored in the area of the proposed infiltration
system.
North Hole:
- Location: 10 ft. east of the edge of pavement (north/south street) and 20 ft. south
of utility pole located near properties northwest corner.
- Soil Type: Everett (#18)- Gravelly Sandy Loam
- +8" dia. hole
- 48" deep
- Infiltration rate test:
The hole was filled with water. Draw -down was measured as follows:
Time Draw -down Rate (in./hr.)
0 - 5 min. 1-3/4" 21.0
5 - 10 min. 1-011 12.0
10 - 15 min. 0-1 /2" 6.0
15 - 20 min. 0-3/4" 9.0
20 - 25 min. 0-3/4" 9.0
25 - 30 min. 0-1 /2" 6.0
30 - 35 min. 0-1/2" 6.0
Average Rate = 8.0 in./hr. (excluding first 5 min.)
South Hole:
- Location: 10 ft. east of the edge of pavement (north/south street) and 70 ft. south
of utility pole located near properties northwest corner.
- Soil Type: Everett (#18)- Gravelly Sandy Loam
- +8" dia. hole
- 44" deep
- Infiltration rate test:
The hole was filled with water. Draw -down was measured as follows:
Time Draw -down Rate (in./hr.)
0 - 5 min. 1-3/4" 21.0
5 - 10 min. 1-011 12.0
10 - 15 min. 1-1/4" 14.9
15 - 20 min. 0-3/4" 9.0
20 - 25 min. 0-3/4" 9.0
25 - 30 min. 1-011 12.0
30 - 35 min. 0-3/4" 9.0
Slowest Rate = 11.0 in./hr. (excluding first 5 min.)
Average Rate = 9.5 in/hr.
Minimum allowable per DOE/King Co. Design Standards = 8.27 in1hr.
Lovell-Sauerland and Associates
October 2003
Tom R. Belt Homes
LSA No.4421
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