20120413104932939.pdfCity of Edmonds
121 5TH AVENUE NORTH • EDMONDS,
PUBLIC WORKS DEPARTMENT
Engineering Division
WA 98020 - (425) 771-0220 FAX(425) 771-0221
Website: www.dedinondsmams
Plan Cheek#: BLD20110669 3rd 11evi.eyy, Date: March 12, 2012
Project Name/Address: Trieu SFR 7109 Lake Ballinger Way
Contact Person/Address/Fax: Brian Thaete 206-240-9459 brianthaete@hotmail.com
Reviewer: JoAnne Zulauf Division: Engineering
During review of the subject submittal, it was found that the following information, corrections, or
clarifications would need to be addressed. All Handouts and Standard Details referred to in these
comments can be accessed at our website: www.ci.e(hnqndswa.US by clicking City Government / City
Department / Public Works / Engineering Division:
Please Note: Building1landwits do not include updatedEngineering Division Requirements. Refer to
Engneeri lgiiantL ts I'm, all En i i tdrements.
Pnw e... A ....'____leaseotencornmebased Feruar2sunfta_L
ICT-TrITT".
12/7/12 Done
2. 13/7/12 Done.
3. 3/7/12 See drainage Ipllain comments. 2/14/12 Revise to reflElIc' new calWkTUWIS, You can
add inn a line that statesdie 1991 s[,)MIS WWI Ihas as stonnMl[er waiver with the date of the
waiver. The impervious surface calculation box from the Stormwater Management Handout
#E72 Worksheet must be included on this plan.
4. 3/7/12 Done.
5. NEW Comment: Please label -the shaded area located °to the northeast side of the
house and label sports court.
1 . 3/7/12 Done,
DATE FAXED/E-MAILED 3/12/2012 PAGE 1 OF
2. 3/7/12 Not done. Please consider straw or cornpost waddles. I've attached a detail
for thern. 2/14/12 An irtercep'(or svvaRe care not be constructed wrffiiin a \A/eUand or
weflardd bii..iffer area, i`Iease replace Mb an alternate erosion control rneaUire. All erosion
and sediment control measures shall be shown on the plan. Details of each type of
measure used shall be included with the plan.
3, 3/7/12 Done,
4. 3/7/12 Done.
5, 3/7/12 Done.
6. 3/7/12 Done
Stormwater/Utillily Plan:
NEW Storn°iwater Comments
3/7/12 impervious Surface calculations do not agree with architectural measurernents.
Please see attached calculations based on sheet 2 of the architectural plans.
3/7/12 Ml Il lans, reports and other staternents of limpervious surface calculations rntmt be
revised.
3/7/12 100 sf of concrete retnoved is noted as a credit against the total regulated Iii nipervious.
Renioval of ii regulated impervious surface cari not be credited against regulated
impervious surface., Please remove creditfrorn calCUkatiOrIS.
3/7/12 Proposed west sidewalk is not included in impervious surface cakn,flations.
3/7/12 Please revise drainage systern sizing based on revised impervious surface aind subirviR
in ew plans.
3/7112 Upon receipt in the February 231rd SUbmittal oftheflood lhazard assessiment prepared
by Ed Mt.Carthy, P.E., PS, the current location of the drainage systern lis in the 100 year storm
event flood zoino. rhe simplified sizing detention systerns are only designed for 10 year storm
everits. Please relocate the systeni outside of the flood zone.: The new City handOU't detention
details, (in Flandout E72a Inch,ided in your dralinage report) do not specify the minknurn
separation of 10 ftfrorn a structure. AfthOUgh ffmt distance is ideal, it is not mandatory. With
that said, it may be advantageous for you to relocate the system in the driveway area.
3/7/12 Standard detail copied on the Drainage plan is snot the detail found in the [°Erig handout
E72 A (inckided in your drainage ireport). Fllease replace.
3/7/12 No ruri(Af front the existing impervious surface areas roan eriter-the detention system.
Areas that will rernain and replaced shall It sloped to direct runoff sonwwkieire other'Rian
rnainhole. Please note rein plairis.
DATE FAXED/E -MAILED 3/12/2012 PAGE 2 OF
3/7/12 Handout E72A (included iiri your drainage repoirt) sizing states that the OUMOW pipe for
a system midgating 2000 to 4000 s'r of irinpervious surface rnust be 8" minimurn. This applies
to the riser pipe only. Please revise plan details.
3/7/12 Drainage Report: 1.11ease note that a drainage report is not requirt(I if you use the
sirnplified sizing rnethod, Once corrected with "to rneet requirements of this set of cornmerits,
it will be reviewed by the Stonier Engineer if you choose to SUbIllit it. If YOU choose to
suboxift it please make the following corrections prior to resubmittal.
a) I he drainage detail elevations are different than the detail sl'iown on the drainage
plan.
b) Handout E-72A (included in your drainage report) sizing states that thc) witflow pipe
for a systern niffigating 2000 to 4000 sf of irnperviot,is surface must bet" Miffll-(Mm.
This applies to the riser pipe only. "this detail also slwws the ouffall pipe as 4" when
detail on plan shows 6", Please revise report detention detail.
c) Revise all impervious Surface calculations. The 100 sf of [irnpervious removed is non
regulated surface so can not be credited to regulated suirface.
d) Page 8 information has Ibeeen addressed in previous comments and tile i info, irrnatio ri
shown has no re Ievaince to the CUrrent (plans, Please Update or rernove.
3/7'/12 Resolved wetland issue.
3/7112 Revise plans and report. 2/7/12: The submitted plan does not seem to be in agreement
with the calculations for the storm system requirements. If the following is true then the new
impervious surface is sf and is not regulated by the storm water code.
7. The stormwater system shall be sized in one of two ways:
a. The simplified sizing chart located in the Stormwater Handout E72A. If you choose
to use the simplified sizing chart, please review the section Design and
Construction Requirements. A system detail shall be provided consistent with the
example shown in handout. 2/14/12 L)se the detail in the E72 A Flandotd to add alll
rim and iinvert eilevafions and other s0rig, Uf siinplifiied sizing iS Used, a stormwater
report, is riot required.
b. 3/17112, Not Done. As previously stated, the design must reinain as shown in
the handout detail if you choose to use tlie simplified sizirig method. That
means it needs a catch basin at both ends. "rhe submitted report does riot
calculate sizing and relies on'the inforniation provided by the handout. See
the Storm Water Supplenien't (available on our website) -to find the
reqUiretnents for other rnethods of sizing. If you choose to use a detention size
not listed on the chart 2/14/12 (e.g. a different size catch basiuor rnan[mle, on�y
DATE FAXED/E-MAILED 3/12/2012 PAGE 3 OF
one aiainhole, e�,c), the system must be designed by a Civil Engineer. Calculations
and a detail of the system are required.
8. 3/7/12 Not consistent between plans and report. Please revise. All stormwater catch
basins, yard drains etc. shall be noted with rim and invert elevations.
9. 3/7/12 Not Done. How will new concrete pad runoff be collected? All "regulated"
impervious surface must be connected to the detention system. See Stormwater
Management Handout Worksheet (# E72)to determined the regulated impervious surface
on the property.
10. 3/7/12 Please revise all calciflations and confinn'they are corisistant throug[iout
project. 2/141,12 F%ase revise. Impervious surface calculations from worksheet are
required on this plan.
11.3/7/12 Parflafly done. Add rnaterial and length to water line, add length to all
stretches of sewer line. 2/14/12 Not done. All pipe, storm arid other ufiRies, shall be
noted with size, length and material.
12.3/7/12 [)one.
13.3/7/12 Martially done. Add Cleannut at house. 2/14112 Not done. Sewer shall have a 4"
cleanout at house and a 6" cleanout at property or easement line.
14. Through 20. 3/7/12 Done.
DATE FAXED/E-MAILED- 3/12/2012 PAGE -4- OF -4-