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ACCEPTASLE TIGHTLINE MATERIAL
N-12 ADS
Sch 40 PVC
SDR 35 (ASTM D3034)
APPROVEO AS NOTE
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STANDARD DRAINAGE DETENTION SYSTEM
WORKSHEET
OWNER CALC BY:
ADDRESS PHONE:
DATE:
*****DESIGN DATA*****
IMPERVIOUS AREA PIPE DIA PIPE L.G ORIFICE
DETENTON PIPE LENGTH WASHED GRAVEL
2�F W
OUTFLOW TRENCH. MIN MY L
TOP AND 4'PERF PIPE TO 8 LEVEL
RIM ELEV romm COVER WMIK SFACE
2*MAX COVER RIM ELEV FROM
CONTROL
A L OUTLET
Ire MIN 4-PERF PIPE W/CAPS
11% SLOM 4"s MIK
ORIFICE RUNOFF SPREADER
OUTLET.
INV ELEV INV ELEV-
L*WR CA rCH CoNrROL CAMN
SASIM BASIN`
�2*zZxIVOEEP, 4'-g"OUARRY SPALLS
%21W DEEP, 3/4'CRUSHEO ROCK
SYSTEM CROSS SECTION
FROM CONTROL
OUTLET
RIPRAP OUTLET
FOOTING DRAINS SHALL NOT. BE CONNECTED TO DETENTION SYSTEM
NOTES.-
1. Call Engineering Division (771-0220) for a tightline and detention system inspection
APPROVED BY
before backfilling and for final inspections.
2, Responsibility for operation and maintenance of drainage systems on private property is the
responsibility of the property owner. Material accumulated in the storage pipe must be flusheA
out and removed from the catch basins to allow proper operation.. Ile outlet control orifice
DATE
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must be kept open at all times.
PRIze 6 of 6
TEL NO.367-1017 May 23.95 5:16 P.01
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Dennis M. Bruce, P.E.
iii.C.E., M.B.A. GeMechnical/Olvil Engineer
May 18, 1995
Via Fax 771-0221
City of Edmonds
Community Services, Department
Subject: Geotechnical Assessment - Jim Anderson Residence -
19314 94th
OfIft'01,
&'4Y'9'3 #01,
199S
This engineering report presents the results of a geotechnical assessment and
ongoing foundation monitoring for the Jim Anderson residence rebuild. The residence is
located at 19314 94th, Edmonds, WA. The assessment was necessitated by owner/builder
concerns, as well as City of Edmonds requirements for sensitIvelsloped areas.
gefe Project Plans by Ron Johnson, Architect
Project Photographs (available)
Backgroun ;
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An existing residence, approximately 25 to 30 years old, has occupied the westerly
sloping lot without any detrimental Seatechnical impacts. Mr. Anderson proposes to
demolish some/most of the existing residence and construct a new larger residence. (See
City of Edmonds approved plans).
The new residence requires additional foundations to the southwest of the existing
house.
Assessment:
On February 20, 1995 this engineer performed soil test pit investigations to
determine foundation design criteria. Test pits were dug by a large backhoe to reveal
subgrade conditions and engineering notations were written on the approved set of plans.
Dense sands and dense silty sands were verified. Beating capacity of 2,000
p.s.f. (Mill.).
The southwest corner footing was modified to result in a 4 ft. by 4 ft. square, 10
inches thick, with #4 rebar placed 12 Inches on center, each way.
The remainder of the new west footing was widened to 24 inches, with 3 #4
reba r.
* West deck supports were 24-inch diameter, 7 4. deep reinforced concrete "sono"
tubes placed on dense undisturbed native soils, as verified by this engineer.
* A new rockery was placed west of the new residence. This rockery provides
erosional stabilization and slight yard grading. Previously, some storm drains
SOILS - FOUNDATION$ - SITE DEVELOPMENT - INSPECTION - DRAMAGE - DESIGN& PERMIT - LEGAL
178`14 Bill Ave. N.W. - Seattle, Washington 98177 - (206) 540-9217
released directly on the western slope. A new spreader dispersion pipe was
placed within the upslope rockery drainage zone, per this engineer's
recommendations. (Photographs available).
Summary:
• Soil investigations verified proper geotechnical criteria for expanded residence.
• Contractor complied with this engineer's recommendations as confirmed by on -
site inspections and photographs.
s- Foundations installed per engineer's criteria.
New rockery and drainage spreader dispersion installed properly., Significant
improvement to previous conditions.
If there are any questions, do not hesitate to call.
Extandad Paga
If there are any questions, do not hesitate to call.
Dennis M. Bruce, P.E.
Geotechnical/Civil Engineer
DMB:njt
cc: Mr. Jim Anderson (Via Fax 775-0715)
TELEPHONE CONVERSATION RECORD
Building Permit #95-0064
Project Address: 193314 94th Avenue West
Dennis Bruce, Engineer, left the following message on my voice mail on the afternoon of
March 8, 1995. The followina message was taken frorn the recordina verbatim and its
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contents and accuracy were verified by witnesses.
"Hello Ann, this is the engineer Dennis Bruce 546-9217 and I'm calling regarding Mr. &
Mrs. James Anderson project 8808 184th, Permit #95-0064, at 193 14 94th Avenue West,
and I'm the en-ineer for the foundations and I looked at this north building wall with it's
questionable 2x4 construction, rnade an engineering determination that it had to be
replaced with the code 2x6. I understand, there's sorne Issue now that they should have
left the inadequate structural wall LIP. I don't think the City of Edmonds wants to take
liability for poor earthquake design. I'm looking at approved set of plans by you dated
February 6th on Sheet 2 of 11, and there's some red lines with setback distances. The
north line is very clear, we're putting, the new house at the sarne spot [as] the old house
but it's an engineerina decision for the integrity of that wall, and call me, Dennis Bruce
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enorineer 546-9217, 'cause I run into this all the tirne and no City or County wants to tell
people to build a structurally Inadequate house. Sounds like a little sloppiness on the
architect's part, but let's get on with it here before we jeopardize the foundation, 'cause
its raining and we can have some problems here if we wait. Thank you Ann. I'll look
forward to hearing from you. Dennis Bruce. Bye-bye."
1.
Taken frorn voice mail message by. -
I
Ann Bullis, Code Enforcement Officer
The followin- witnesses listened to the message while readin- the above written account
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of the voice mail message and found it completely ace fiate:
Sharon Nolan, Permit Cdordinator �teve Bullock, Assistant Planner
JeVnnine Graf, BL-lildwfficial
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