20160108131854.pdfCO.INSIGHT ENGINEERING
January 6, 2016
Jennifer Lambert
121 5"' Avenue North
Edmonds, WA 98020
(425) 771-0220
Re: Kemper Residence
IECO No. 15-0736
Dear Jennifer,
The project referenced above is revised in response to the review comments dated January 6,
2016. The review comments are numbered on the letter and have been addressed in italics as
follows:
General
1. There are too many plans on the submitted plan sheets that address the same information
throughout each plan. Please revise the Plan sheets as stated below
f. Due to the amount of plans submitted and the overlap of information on the three
sheets the comments below will attempt to capture all changes; however, there
may be additional comments after the 2nd submittal not addressed in this
submittal.
Comment noted.
2. Please label the private access and utility easement.
The private access and utility easement has been labeled.
3. Please make sure that the Site Plan and the Civil Plans are consistent. Label the retaining
walls, rockeries, etc. on both plan sheets.
The rockeries have been labeled on both plan sheets.
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Water
1. Comment was partially addressed. It appears that there are two pipe sizes called out
for the water service line. Please revise the plans to make sure that all the items
below have been addressed.
It appears that a fire sprinkler system is required for this property. Typically if there is an
existing water service line from the water main to the meter it will not be the appropriate
size and a new tap will be required.
a. Please show the water service line from the meter to the house.
The water service line from the meter to the house has been shown.
b. Please add a note that a 1" meter is to be installed.
The note has been added.
c. Please show a 1-1 /2" line to be installed (as required for a combination fire and
domestic service line).
The waterline has been relabeled.
d. Please label the pipe material and note tracer wire to be installed on the water
service line.
The pipe material has been labeled and the tracer wire has been noted.
e. There must be a minimum of 3' separation between the dry utilities (power, gas,
cable, etc.) and the water main. Please revise the plans accordingly.
The 3' separation between the dry utilities (power, gas, cable, etc.) and the water
main has been provided.
2. Current location is approved; however, since the meter needs to be upsized due to
the requirement for a fire sprinkler system, there will be a new tap on the main.
PO Box 1478 • Everett, WA 98206 • Phone: (425) 303-9363
Fax: (425) 303-9362 • Email:info@insightengineering.net
a. The current and new water service line from the main to the meter comes or will
come into the east side of the meter. Please revise your plans to show the water
service from the meter to the house leaving the meter on the west side.
The water service has been revised.
b. Please add a note to the plans that the location of the new meter to be coordinated
with the City's Water Department at 425-771-0235.
The note has been added.
3. The water service line is showing as being replaced within the asphalt of the private
drive. Please show/note the following, "Contractor to complete final restoration on all
trench patches for utilities installed with this development."
The note has been added.
Sewer
4. Comment partially addressed. The lamphole cover note was not added.
Show a 6" cleanout at the edge of easement (located within the easement). Please add a
note that the 6" cleanout at the edge of easement will have a 12" cast iron lamphole cover
with ''/z" hexbolts.
Note has been added.
6. Comment was not addressed
Please show the invert elevations at the main and the house so that slope and coverage
can be verified. If the slope of the pipe exceeds 20% the pipe will need to be anchored.
Inverts have been shown.
Storm
1. Comment was addressed; however, footing drains, sump pumps, retaining wall and
rockery drainage, typically do not discharge to the onsite stormwater management
system unless the system is designed to account for the additional water.
a. Please revise the drainage report to address the addition of the footing drains,
sump pump, retaining wall and rockery drainage to the proposed system.
Footing drains, sump pump, retaining wall and rockery drainage will be directed
to the infiltration trench per geotechnical recommendations.
b. Or the footing drains, sump pump, retaining wall rockery drainage may
discharge to a separate system (i.e. drywell). If you choose this option, please
PO Box 1478 • Everett, WA 98206 • Phone: (425) 303-9363
Fax: (425) 303-9362 • Email:info@insightengineering.net
_......._ _... _......_... ......... ........_
provide a memo from the Geotechnical engineer of record approving the
location of the drywell.
Show where the footing drains will discharge to.
Footing drains, sump pump, retaining wall and rockery drainage will be directed
to the infiltration trench per geotechnical recommendations.
2. Comment was not addressed. It appears that there is a retaining wall along the west
patio. Please show where the drainage for both the retaining wall and rockery will
discharge to. Please refer to note one above.
Show where the retaining wall drainage will discharge to..
Retaining wall and rockery drainage will be directed to the infiltration trench per
geotechnical recommendations.
3. Comment (a) was not addressed.
Per the plat (598-082) this lot has a detention system that was installed and designed to
collect 5000 sqft of impervious surface water. If you have 5000 sqft or less you may
directly discharge to this system without an additional detention system. To discharge to
this system, please provide the following.
a. Please submit a report that verifies that the existing system is functioning
properly.
Comment noted. See attached letter,.
b. If the amount of impervious area exceeds 5000 sqft, a flow control system will
need to be installed to account for the additional impervious area. This
configuration will need to be evaluated by a licensed engineer to show that the
downstream system (not owned by the City) is not adversely impacted.
An infiltration trench has been designed to accommodate the impervious areas
that exceed 5000 SF.
5. Comment was not addressed
Please provide rim and invert elevations for all pipes within the catch basins.
The rim and the invert elevations for all the pipes within the catch basins have been
provided.
6. Please show how the runoff from the driveway will discharge to the catch basin (i.e.
directional flow arrows, etc.).
PO Box 1478 • Everett, WA 98206 • Phone: (425) 303-9363
Fax: (425) 303-9362 • Email:info@insightengineering.net
a_..------ ... _.......
The discharge of the runoff has been shown.
7. Note the catch basin in the driveway as Type I.
The catch basin has been noted as Type 1.
8. Add an observation well to the infiltration system.
An observation well has been added.
9. Show the pipe connecting to the infiltration at the north end (not at the middle of the
pipe).
The pipe has been shown.
10. The force line from the sump pump needs to connect to a catch basin. Please revise
accordingly.
Comment noted. See revised plan.
Dry Utilities
1. Comment was addressed; however, the 3' separation applies to storm as well. This was
not originally put in the comment since there was no conflict with storm at that time.
Please address accordingly.
Please show a minimum of 3' separation between the sewer/water and all the dry utilities
(gas, phone, cable, etc.).
The minimum separation has been shown.
Please feel free to contact me with any questions or comments you may have.
Sincerely,
Santhosh Moolayil
Project Manager
PO Box 1478 • Everett, WA 98206 • Phone: (425) 303-9363
Fax: (425) 303-9362 • Email:info@insightengineering.net