HomeMy WebLinkAboutSWP27179431z5/FS
HYDRAULIC REPORT
FOR
SHOHEN LIMITED PARTNERSHIP
Prepared By;
TOUMA ENGINEERS
201 SW 41st Street
Renton, Wa. 98055
r_FNFRAI
The proposed Site consist of approximately 0.7 acres, situated
east of Maple Avenue SW and 3oo feet north of SW 16th Street,
in the City of Renton.
The topography of the Site is fairly flat, 0.8% to 1.3% slopes,
sloping east to west. Off -site drainage flowing through the
Site is minimal, thus off -site areas are not calculated in
determining the natural allowable flows from the Site.
The Site cover is bareground except for small areas have
grass cover and second growth vegetation.
ANALYSIS
The most remote point is located along the northeast corner of
the site, approximately 220 feet long, and at an average slope
of 1.0%.
T = 10 + 220/.98(60) = 13.74 min.
I = 1.34 in/hr
C = .15 Light grass to bareground
Qa = C.I.A = .15(1.34)(0.7)
= 0.14 cfs
This represents allowable flow from the Site in natural
state, and will be used to size the outlet contol device.
Qo = Qa/ A Cd
= 0.14/ 0.70(.7) = .287 cfs/acre
T = -25 + V1762/.287 R:�a��•;
= 53.35 min.ro
�-14
Vs = 2820(53.53)/ 78.35 - 40(.287)(53.35) <r(�•.'yt.f_:,;..`:AGi'�a+
= 1920.34 - 612.46 f- -` `'` • ` �o
= 1307.88 cu ft per acre developed
Vt - Vs
A C(i `
1307.88(0.70)(.70) ``c ;'• �"�
640.8 cu.ft. S
f I y
The storage facilities consist of open pond in the parking lot
at a maximum depth of 0.5 feet over the proposed catach basin.
Al
= 50 x
.5/2 =
12.5
sq.ft.
A
= 13 x
.12/2
= 0.78
sq.ft.
A
= 12.5
+ 0.78
/ 2 =
6.64 sq.ft.
V1
= 6.64
x 107
= 710
cu.ft.
V2
= 1/3
x 12.5
x 25 =
104 cu.ft.
V3
= 1/3
x .78 x
6.0 =
2 cu.ft.
Vt
= 814
cu.ft.
Required
641 cu.ft.
Sizing the orfice for the outlet structure;
a = Qa/.62 � 2gh
= .14 / .62V64.4(2.82) = .017 ft.
d = �14(.017)/Tr = .146 ft
= 1.75 inches
TEMPORARY EROSION/SEDIMENTATION CONTROL
Because of the small size of the Site, we recommend installation
of filter fabric fences at the lower elevations of the Site to
intercept silt -laden runoff resulting from the surcharging
operation and grading of the Site.
DOWNSTREAM ANALYSIS
The existing storm sewer system in Maple Avenue SW consist of
an 8-inch concrete pipe, sloping northerly toward the State Hwy
I-405 rights -of -way at a fairly flat grade of 0.26%. The
system discharges into ditch directing flows easterly. The
outlet pipe invert is approximately .6 to.8 feet below the
ditch elevation. This condition keeps the water in the pipe
until sufficient head is built up to force the water into
the ditch. Cleaning the ditch from silt and debris would
allow the water to flow freely from the pipe. It was noted that
the existing storm system in Maple needs to be cleaned. Several
curb inlets were found plugged with silt.
— Z'
."
BOARD OF PUBLIC WORKS
Wednesday, May 6. 1981
9:00 a.m.
Renton Municipal Building
4th Floor Conference Room
Present: Richard C. Houghton, Chairman
Richard Geissler, Fire Chief
Ron Nelson, Building Director
John Webley, Parks & Recreation Director
Gary Norris, Traffic Engineer
Roger Blaylock, Planning Department
Mike Parness, Administrative Ass't.
Jean Truman, Board Secretary
Guests: Mike Bradford, Steak & Ale (Jolly Ox)
Thomas Dahlby, 1402 Maple Ave. SW
Dirk Winkie, Win -Key Enterprises
Mike Smith, Belterra Development Co.
MI NUTE.5
1. CALL TO ORDER - The May 6th meeting was called to order by Chairman Houghton
at 9:00 a.m.
2. APPROVAL OF MINUTES - Moved by GEISSLER, 4eeon.ded by BLAVLOCK, ,the minutee
o6 Ap.tkt 29, 981 e apptoved a6 amitten. MOTION CARRIED.
3. CORRESPONDENCE - None
4. REFERRALS FROM CITY COUNCIL - None
5. REFERRALS FROM DEPARTMENTS
a. Auxiliary Parking Lot at S. 2nd St. & Lake Ave. S., HAS Properties - Mr.
Houghton noted that Mr. Gordon was unable to be present at the meeting because of
illness. Discussion was held regarding denials by the Board and it was noted the
matter had been discussed at the City Council meeting. It was recommended that
when a matter was denied by the Board that the letter from the Board which con-
firmed the denial should also give the applicant his further course of action.
Moved by NELSON, aeeonded by GEISSLER, .the Board tequut the pnopue wording 6.kom
the City A,ttonney to 4inseht in tettena o6 deriiat o6 appti.eation .to •tett .the appZi.-
ca►Lt what hiz next eounae o6 action coo d be and hiz nights .to appe.ai .the action
o6 .thkc Board. MOTION CARRIED. Discussion was also held that decisions by the
Board should be made when the applicant is present. The matter of the Auxiliary
Parking Lot was deferred for one week so the applicant could be present. '
b. Deferral of Off -Site Improvements, S. Bruce Cass Office Building, 333
Rainier Ave. N. - This matter was deferred for one week until either Mr. Cass
or Mr. Lucker could be present.
c. Deferral of Street Paving, Thomas R. Dahlby, 1402 Maple Ave. S.W. - Reports
from the Planning Department and Design Engineering note no objections to the
requested deferral. Mr. Nelson asked if the street was tied in with the LID on
SW 16th St. and if the applicant had contacted the Engineering Division about
sewer facilities. It was noted that LID 314 would not cover that area. Mr. Dahlby
said this was just an alteration to an existing residence of about 600 sq. ft.
that+he wants to convert to an office and add a warehouse to the property. The
BOARD OF PUBLIC WORKS
May 6, 1981 - Page Two
site plan has been approved by the Hearing Examiner. Mr. Dahlby noted he did
not object to putting in the sidewalks, curbs and gutters. It was noted that
the utilities and sewer should be run to the site before the street was paved.
Moved by NELSON, aeeonded by GEISSLER, the Board grant the de6eAAa,_1 Son a pe&i.od
not to exceed two yewLz wZth Rea.tAi.cti.ve covenantz Shed p4iot to -c.aeuance ob
.the bu.i1d.i.ng permit. MOTION CARRIED.
d. Steak & Ale of Washington (Jolly Ox), Variance on Parking Lot on the
East Side of West Valley HighwaX at the Intersection of Strander Boulevard -
P anning apartment report noted that applicant had submitted a request to the
Hearing Examiner to consider a temporary use permit; however, the Examiner
determined that the request was improperly made since a parking lot is an allowed
use in the MPm Manufacturing Park Zone. Therefore, the applicant has applied for
a variance to the asphalt paving standard of the parking and loading ordinance.
The request is supported by the Comprehensive Plan which shows that Strander
Bouldvard should be connected through the subject property; therefore, anything
installed should not be permanent. Plus the intended use is for employee park-
ing only. The report recommended approval for a maximum of two years; that it
be used for employee parking only; modification of access to south end of lot
and landscaping of the frontage along the West Valley Highway. Engineering
Design report noted the lot should be paved and striped. Mr. Houghton said
they should get with the Traffic Division and arrange the entrance in such a
way that left hand turns are impossible to make. Mr. Nelson noted that he
agreed with the deferral, however, there are two other parking lots and two
postponed that the Board has been very restrictive of an' the Board should be
consistent. Mr. Blaylock remarked that thane was many differences with this
deferral as Strander Boulevard was going to be cut through there and the cost
Of paving would be prohibitive. Moved by NORRIS, aeeonded by HOUGHTON, .the
paving be debeeAAed Son a maxumm ob two yewLz ptov.tded .that .they submitted a
pfa.n. Sot the tandaeapcng and appropriate ehanne izati.on bon &i.ght -tu4ns .in and
out Oil the aou,th; ptov.i.de a 6i4e accea.a and pave .the dti.veway San enough in
to eiimina-te 9&avet being eauuu ed onto the Roadway. MOTION CARRIED.
e. Request for Franchise Permit, relterra Development Co., Cedar Ridge
Access Road - Planning Department report noted the access to the proposed Cedar
Ridge P.U.D. has become very complicated as a result of who the Bonneville Power
Administration can grant easements and dedicatio.is to. It appears that the only
option is to grant the franchise to allow the project to continue. However, this
means that the City Council will have to change their policy concerning franchises.
The Board should be careful to make sure that the City transfers all liabilities
and that the developer transfers all liabilities to the home owners association
and this should be clearly stated in the franchise, hold harmless agreement and
the homeowners articles of incorporation and by-laws. The report recommended
approval to the City Council upon preparation of appropriate documents by the
applicant and City Attorney. Mr. -Houghton noted that the City is asking the
developer for a 22 ft. asphalt roadway, an 8 ft. shoulder and open ditches with
a paved pathway along the side, and it will essentially be a private road. Chief
Geissler said that it should be a public street and should be maintained by the
city. Mr. Smith noted that the covenants will assure police and fire access.
Moved by NELSON, .aeconded by WEBLEV, to concur in the bRa.nchize peg i t to BeitetAa
that c4;i.Y.f' be d4awn up by .the City A,ttotney and aueh eoncuAAence be Recommended .to
Tice_ City CouncU. MOTION CARRIED. Mr. Norris noted that the concerns of the Fire
Chief should be taken into co nsi eration. Chief Geissler was advised that he
should contact the City Attorney with his concerns.
24 MR. EMERGENCY SERVICE 7 DAYS EK
J. J. JACKSON
Septic Tank Service
SERVING KING COUNTY SINCE 1934
Ken R. Durham Larry E. Bryant
246-1731 255-7873
BUS. PHONE 255-6242
15671 S.E. 130 PL. RENTON, WA Q8055
1402 Maple tivenue S.W.
Renton, Washington
Larry E . Bryant
15671 S.E. 139th Place
Renton, Washington
April 2, 1981
Dear Mr. T. Dahlby,
The J.J. Jackson Company, septic tank service,
hereby agrees to pump the holding tank at the business
site: 1402 Maple avenue South blest, Renton for the
H. Dahlby Company. This will be on Mr. Dahlby's request,
probbbly every other month. This will also be for an
Indefinite period, terminating when the services are no
longer needed.
Sincerely,
J.J.Jackson Company
La rr7 . Bryant
3S
3213 Mountain View North
Renton, Washington 98055
May 12, 1981
The City of Renton
Building Department
200 Mill Avenue South
Renton, Washington 98055
RE: Property Located at 1402 Maple Avenue Southwest,
Renton, Washinqton
Gentlemen:
We, Thomas R. Dahlby and Kathleen I. Dahlby, owners
of the above described property, hereby agree:
1, not to oppose the formation of an
LID for sewers,
2. not to oppose signing a petition supporting
the formation of an LID for sewers,
3. to connect to a sanitary sewer when it
becomes available.
Sinc,Trgy
3
Kathleen I. Dahlby
#04 7 <.
RECC, F 5.00
r:gSH;L 4:5. nr,
22
DECLARATION OF RESTRICTIVE COVENANTS
WHEREAS
%0
+
O
3D — —' - --
Oare the owners of the following real property in the City of Renton,
CD
County of King, State of Washington, described as Exhibit 'A'
attached hereto.
WHEREAS, the owner(s) of said described property desire to
impose the following restrictive covenants running with the land as
to use, present and future, of the above described real property.
NOW, THEREFORE, the aforesaid owner(s) hereby establish,
grant and impose restrictions and covenants running with the land
hereinabove described with respect to the use by the undersigned,
their successors, heirs, and assigns as follows:
INSTALLATION OF OFF -SITE IMPROVEMENTS
The owner(s) of the above described property, their suc-
cessors, heirs and assigns, hereby agree and covenant to
participate in, sign a petition in support of, and accept
any future Local Improvement District (LID) or city initia-
ted proposal, and pay their fair share therefore, for the
purposes of providing the necessary off -site improvements
required by the Penton Subdivision Ordinance. Said improve-
ments shall include but may not be limited to the installa-
tion of curbs, gutters, sidewalks, street paving, sanitary
sewers, storm sewers, undergroundi ng of uti 1 i ties, and
street lighting.
These covenants are imposed in lieu of Section 9-1105(6)
of Title IX of Ordinance #1628 of the City of Renton.
' �I RECORD AT REQUEST '91
PITY LURK
BLOG.
0_"_ ><'
RFiOPmr) 1 NI" nA �
y�r 19 I I zi AR 9P I
Sr .JNcr
RF x E_LFr TIONS
n INS, t, "IJfv