BLD20151115_Crosby_ENG1.pdf
City of EdmondsBLD20151115
TH
121 5AVENUE NORTHEDMONDS, WA 98020 • (425) 771-0220 FAX (425) 771-0221
Website: www.edmondswa.gov
PUBLIC WORK DEPARTMENT
Planning • Building • Engineering
Engineering Plan Review Comments
PermitApplication:Date:
#BLD20151115October 23, 2015
th
Project Name/Address:
Crosby Homes Inc –23207–75Pl W
Contact Person/Address, Fax or E-mail:
chuckcrosby@cox.net
Reviewer: JENNIFERLAMBERTDivision:
ENGINEERING
During review of the subject submittal, it was found that the following information, corrections, or
clarifications would need to be addressed. All Handouts referred to in these comments can beaccessed at
our website: www.edmondswa.govunder City Government / Development Services Department /
Engineering Division then scroll down to Handouts:
SITE PLAN(1OF 3)
1)As changes are made to other plan sheets, please revise this sheet as needed.
2)Please show theproposed and existing topographic lines.
3)Please show all retaining walls, fences, rockeries on this plan sheet.
GRADING & TESC PLAN(2OF 3)
1)Adda note thatthefilter socks will be added to catch basins downstream from the site per Edmonds
Standard Detail E1.3 as needed.
2)Show all trees, both onsite and adjacentto the site,that are to remain. Please show protection fencing at
the drip line of thetrees.
3)Please show thelocation of anystockpiles.The stockpilesshall not be placed overtheproposed location
of theinfiltration system.
4)Protect proposed infiltrationarea from compaction by heavy machinery.
DATE E-MAILED10/23/2015PAGE (1)
City of EdmondsBLD20151115
TH
121 5AVENUE NORTHEDMONDS, WA 98020 • (425) 771-0220 FAX (425) 771-0221
Website: www.edmondswa.gov
PUBLIC WORK DEPARTMENT
Planning • Building • Engineering
Engineering Plan Review Comments
DRAINAGE/UTILITY PLAN(3OF 3)
GENERAL
1)This plan sheet is hard to read and should only showfinished grades, strucutresthat will remain (i.e.
fences, house,sheds, etc),surfaces(i.e. concrete, pavers, asphalt, gravel, etc), utilities(show existing and
proposed, but label to be removed if needed),etc. Please remove information that does not pertain;
such as, theexisting topographic lines, infiltration test sites locations, BSBL line, etc.
2)It appears from the revised topographic lines that there may need to be a wall along the driveway.
a.Please provide a cross section detail for the driveway.
b.If there is a wall to be installed, please show the wall on the plans. Also, show the bottom and
top elevations.
c.If the wall has a surcharge on it, the wall will need to be designed by a licensed engineer.
d.If there is not a wall please address how you will handle the new slope of the landscape areas
around the driveway. Please keep in mind that the natural topography is for runoff of the site to
drain southeast. Please do not redirect runoff such that it drains towards tothe north property.
3)Please label the deck (i.e. spaced deck with permeable surface below, imperviousdeck, etc.).
WATER
1)It appears that a fire sprinkler system is required for this property.
a.Please add a note thata 1” meter is to be installed and show the meter located in the right-of-way,
such that the back of the meter is on the property line.
b.Please show a 1-1/2” line to be installed from the back of the meter to the house (as required for
a combination fire and domestic service line).
c.Please label the pipe material andnotetracer wireto be installed on the water service line.
2)Add a note to the plans that all final restoration resulting from the installation of the water service line is
to be completed by the contractor (not the City of Edmonds).
DATE E-MAILED10/23/2015PAGE (2)
City of EdmondsBLD20151115
TH
121 5AVENUE NORTHEDMONDS, WA 98020 • (425) 771-0220 FAX (425) 771-0221
Website: www.edmondswa.gov
PUBLIC WORK DEPARTMENT
Planning • Building • Engineering
Engineering Plan Review Comments
SEWER
1)Theplans show a 12”sewer line; however,there are two City sewer main lines located on the east side
of the property.An18’’cast iron main and a 24”concrete main. Please revise toshow what actually
exists on site.
2)Show the 10’sewer easement(8905100087)on the plans.
3)The plans indicate that the existing sewerlateral is proposed to be reused. The sewer will need to be
inspected by the City’s PublicWorks department to determine if it can be reused. Contact Edmonds
sewer division, 425-771-0235.
a.If the lateralcannot be reused, anew connectionwill be required. The connection at the main
will need to be a romac inserta teeinstalled by the contractor (not the City of Edmonds).
b.If the lateral is to be re-used, show the installation of a 6” sewer cleanout at the property line(or
edge of easement), such that the cleanout is located within the City right-of-wayor easement.
4)Show a 6” cleanout at the property lineor edge of easement; such thatthe cleanout islocatedwithin the
City’s right of way or easement. Please add a note that the 6” cleanout at the property line or edge of
easement will have a 12” cast iron lamphole cover with ½” hexbolts.
5)Please show the invert elevations at the main and the house so that slope (minimumof 2%) and coverage
(minimum 2’)can be verified. If the slope of the pipe exceeds 20% the pipe will need to be anchored.
STORM
1)The area of the drivewaylocated in the City right-of-way must be included in theimpervious surface
calculcations. That area does not have to be collected to the onsite stormwater managemet system if it is
not feasible. If it is, please direct it to the stormwater managementsystem. Please revise the plans
accordingly.
2)It is unclear from the plans if the surface water runoff from the driveway is directed to the catch basin
that discharges to theonsite stormwater management system.Please provide enoughgradesand or
details so that that the collection of the runoff can be verified.
3)Please provide rim and invert elevations for all catch basins and all pipes.
DATE E-MAILED10/23/2015PAGE (3)
City of EdmondsBLD20151115
TH
121 5AVENUE NORTHEDMONDS, WA 98020 • (425) 771-0220 FAX (425) 771-0221
Website: www.edmondswa.gov
PUBLIC WORK DEPARTMENT
Planning • Building • Engineering
Engineering Plan Review Comments
Comments by the City Stormwater Engineer Program Manager, Jerry Shuster, PE
Drainage & Design Narrative, RMS Engineering, August 24, 2015
rd
1.Intro page, 3Paragraph –The project is a Category 1 Small Site Project, not aCategory 2
2.Page 1, Small Site Minimum Requirement #9 –Include the maintenance requirements from the
manufacturer of the chosen infiltration chamber system.
3.Geotechnical Investigation –Liu and Associates, July 31, 2015 –The report uses a method for
determining the design infiltration rate that is currently not recognized by theCity of Edmonds.
Determination of the design infiltration ratemust comply with Section 5.5.2 and Appendix Cof the
Edmonds Stormwater Code Supplement
(http://www.edmondswa.gov/images/COE/Government/Departments/Public_Works/Stormwater_Utility/
pdf/EdmondsStormwaterSupplementFinal20100428.pdf)
4.Once the design infiltration rateis properly determined, the enclosed revised table can be used to
determine the sizing of the on-site stormwater management system (if still feasible).This chart
interpolates between the infiltration rates of the old table 5 in handout #E72B.
5.Sheet 3 of 3, note 5. –This structure should be a type 1 catch basin.Pre-settling is required prior to any
infiltration system.
DRY UTILITIES
1)It appears that the power is proposed to be aerial; however, all utilities must go underground. Please
revise the plans accordingly.
2)Please show all proposed dry utilities(gas, phone, cable, etc.)on the plans so that utility separation can
be verified. Minimum of 3’horizontal separation between the dry utilities and water, sewer, storm.
Please resubmit 3 copies of the revised plansand associated documents with a written response to each
item to a Permit Coordinator. Please contact me at 425-771-0220ext 1321or by e-mail at
jennifer.lambert@edmondswa.govif you have specific questions regarding these plan corrections.
DATE E-MAILED10/23/2015PAGE (4)