Response to ENG 1 Comments.pdf� civil & structural
ENGINEERING engineering & planning
I,RESUB
MAY 15 2018
May 14, 2018
BUILDING DEPARTMENT
CITY OF EDMONDS
Jennifer Lambert, Engineering Technician
City of Edmonds Development Services, Engineering Division
Second Floor City Hall
121 5th Avenue N
Edmonds, WA 98020
RE: Application #:
Project Name:
Project Address
Dear Ms. Lambert,
BLD20171841
Graphite Art Studios
202 Main Street
Itemized below is our response to the engineering review comments in the March 14, 2018 letter for the
above referenced project. Our response appears in bold.
GENERAL
1. Provide an itemized engineer's cost estimate for both on -site and off -site (right-of-way)
improvements, including traffic control and all utility installations. Use the King County Bond
Quantity Worksheet (available on the county website) and utilize "write-in" sections where
appropriate.
a. The amount of the bond will be based on 120% of the City approved estimate for the off -site
improvements.
b. A 3.3% inspection fee is calculated for the project based on 120% of the City approved estimate
for the entire project improvements.
Cost estimate provided.
2. Please add a note to plans stating: "A separate right-of-way construction permit is required for all
work within the city right-of-way." Please note, a ROW permit application with contractor's
signature shall be provided to the city prior to issuance of civil construction plans.
Added Note #41/C1.1.
3. The haul route map is incomplete. Please revise to show the route to and from Edmonds Way.
Revised. Please also note haul route instructions to and from site (left of legend).
4. The City will soon be releasing new standard details. Please check City website for updates prior to
next submittal.
Noted.
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph.425.778.8500 1 f.425.778.5536
www.cgengineering.com
Graphite Art Studio 16259.22
Comment Response — Engineering #1
May 14, 2018
Page 2 of 9
Sheet C1.1— COVER SHEET AND GENERAL NOTES
1. The construction sequence is incomplete. Please state when stormwater, frontage improvements,
utility work, etc. will be completed.
Revised.
Sheet C2.1— TEMPORARY EROSION CONTROL AND DEMO PLAN
1. Note 3 — Remove the word may and add the word shall. Disruption fees will be required if sidewalk
is closed for longer than 72 hours.
Revised.
2. Show job shack location, if any.
Revised. See dashed line and note south of project area.
3. Please remove the circle on 2"d Ave that indicates the removal of the existing driveway approach
and sidewalk. The entire sidewalk on 2"d Ave shall be removed and replaced as well as the driveway
approach. Please revise the plans accordingly.
Revised.
4. Show stockpile location if any and indicate requirements to keep it covered.
Revised. Stockpile location in SW corner of project area.
5. Add note: Install and maintain all TESC measures according to approved plans, City of Edmonds
standard details, and all other measures that may be required during construction.
Added Note #6.
6. Add note: "disturbed areas to be compost amended."
Added Note V.
7. Revise the construction entrance note by removing the phrase 'when possible'.
Revised.
8. Show power pole on 2nd Ave (near existing driveway approach) to be removed.
Revised.
C 4 CM
ENGINEERING
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph.425.778.8500 1 f.425.778.5536
www.cgengineering.com
Graphite Art Studio 16259.22
Comment Response — Engineering #1
May 14, 2018
Page 3 of 9
9. Any work to be completed at curb bulb outs (demo, install, etc.) shall be coordinated with City of
Edmonds Engineering and Parks Departments.
Added note. See Note 8.
Sheet C3.1—GRADING AND DRAINAGE
Include Hard Surface Area chart on the plans. Provide a breakdown for hard surfaces and roof tops
and the type of stormwater management system being installed to manage each.
Hard surface area breakdown added. See Note 7.
2. Number catch basins and manholes.
Revised. Markers have been added along with a catch basin schedule.
3. Show the City storm main located within the alley both on the plan and in detail 6.
Revised. The existing storm main is now shown, except where it is being replaced.
4. The private storm outfall from the detention system shall connect to the City system at a
perpendicular connection (no angled private line to be located within the right of way) with a catch
basin.
Revised. The outfall is now shown connecting perpendicularly into a new catch basin.
5. Install a catch basin in the curb line on the storm main (on the alley & 2"d)
Catch basin added.
6. Please enlarge the invert elevations on the existing manhole so that they are legible.
Revised. This text has been removed and added to the new catch basin schedule.
7. It appears that the main finished floor of the structure is lower than the east alley. Please show how
the runoff will be directed to prevent surface water runoff from entering the building.
There are no entrances on this side. However, alley overlay will shape to a v-channel, routing
runoff to CB #4.
8. Detail 6— It appears that the stormwater runoff from the alley will enter into the concrete area
located at the SE corner of the building. Please show how the runoff will be directed to prevent
surface water runoff from entering the building.
C 4M
ENGINEERING
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph.425.778.8500 1 f.425.778.5536
www.cgengineering.com
Graphite Art Studio 16259.22
Comment Response — Engineering #1
May 14, 2018
Page 4 of 9
Revised. A trench drain has been added in this area that will span the width of the driveway
catching any runoff that might flow into the parking garage. Contours provided to show more of a
channel in alley.
9. Detail 4 & Plan - The approach for the alley should be installed where the ramp into the alley occurs
in the first 4' and the sidewalk is carried through the back 6' (see ramp across the street for
reference). Please revise the plans accordingly.
Revised. The approach has been updated accordingly. Now detail 2/C3.3.
10. Detail 5 & Plan - The approach for the alley should be installed where the ramp into the alley occurs
in the first 4' and the sidewalk is carried through the back 6'. Please revise the plans accordingly.
Revised. The approach has been updated accordingly. Now detail 3/C3.3.
11. Please confirm with PUD that the location of the transformers has adequate clearance from the
alley.
Confirmed.
12. Provide an elevation view of the PUD transformers to ensure there are no sight distance issues.
Sight distance issues to be coordinated with City of Edmonds.
Sheet C4.1— WATER AND SEWER PLAN AND DETAILS
1. Please add the following notes to the plans, 'Existing lateral shall be inspected by the City Sewer
Division to determine if it is in acceptable condition for reuse. If not, a new 6" lateral from the main
to the property line will be required.'
Added note. See Note 7.
2. Add note that City will TV sewer main prior to final acceptance.
Added note. See Note 8.
3. Show a cleanout at the edge of right of way for the sewer connection from the grease interceptor.
Revised.
4. Provide the invert elevation at the main for the connection of the sewer line from the grease
interceptor.
IE added.
250 4th Avenue South, Suite 200
C C Edmonds, WA 98020
® ph.425.778.8500 1 f.425.778.5536
ENGINEERING
www.cgengineering.com
Graphite Art Studio 16259.22
Comment Response — Engineering #1
May 14, 2018
Page 5 of 9
In covered parking garages - oil/water separator shall connect to sanitary sewer. Storm water runoff
shall tie into sewer.
Added note. See Note 9.
The existing water service line shall not be reused. Please show a new tap and service to the
property. The service shall be placed adjacent to the fire line. The meter shall be placed adjacent to
the curb. The fire hydrant shall be placed approx. 6' from the throat of the ally approach. Please
revise plans accordingly. The existing line (proposed to be used for the fire hydrant) cannot be
reused. Please show the line being cut and capped at the main. A valve cluster is required to be
installed on the City watermain on 2"d Ave. Please show the valve cluster consistent with Edmonds
Standard Detail E7.18.
Valve cluster shown. The fire, fire hydrant, and domestic are shown in the cluster.
7. Show blue reflector required in the street ROW identifying fire hydrant locations. Refer to City
standard detail E7.1.
Revised.
8. Coordinate utility work and final restoration with adjacent commercial development project at the
NE corner of 2"d and Main as they have an obligation to pave a portion of 2"d Ave.
Added note. See Note 10.
9. Underground Wiring Requirements of ECDC 18.05 shall be followed. All utility services shall be
installed underground.
Added note. See Note 11.
10. Show location of dry utilities and required utility separation (5-feet from City utilities within the
ROW and 3-feet from water/sewer/storm utilities on private property).
Dry utilities will come from new trenching off the alley from Main in PUD undergrounding work.
Sheet C5.1— SITE AND STREET IMPROVEMENT PLAN
1. Show 3-hr parking signage. Existing signs should be saved and reused on new posts per City
standards.
Revised. Signs called out with leaders.
Show the existing flower basket located on Main St. Post to be protected during construction. Art
work to be given to the City of Edmonds Parks Department when removed.
Revised. Basket called out with leader and note.
250 4th Avenue South, Suite 200
C C Edmonds, WA 98020
ENGINEERING ph.425.778.8500 1 f.425.778.5536
www.cgengineeri ng.com
Graphite Art Studio 16259.22 May 14, 2018
Comment Response — Engineering #1 Page 6 of 9
3. Revise the plans to show the trees being planted 30' on center, and a minimum of 20' from street
lights, 30' from intersections and 7.5' from alley.
Revised. The north and west property line edges were taken to be where the intersections begin.
Therefore, the edges of the closest street trees were aligned 30' off of the property line edges and
the rest of the street trees were placed 30' O.C. Three street trees were placed on the plan
according to the above criteria. A fourth tree would be in the alleyway approach on both 2"d Ave
and Main St.
4. Add a note that it is preferred to have 3", but not less than 2" caliper street tree with a minimum of
4' branching height.
Added note. See Note 7.
5. Please note on the plans that the street trees to be planted are Columnar Norway Maple on 2"d Ave,
and Capital Pear on Main St.
Added note. See Note 8.
6. Street Trees shall be placed in 3 x 3 ADA compliant tree grates along curb. Refer to City standard
details for tree grate and planting requirements.
Revised. Street trees called out with a typical leader and changed to 3' x 3'.
7. Please add a note to the plans that states the painted centerline and parking will be restriped, as
required, prior to project completion.
Added note. See Note 9.
8. Please revise the parking striping to extend within 20' of alley on Main St. and to extend to the bulb
outs.
Revised.
9. Utility patches with less than 20-feet of separation shall be combined and full width or half width
overlay will be required depending on the extent of disturbance. Where utility patches fall entirely
within one travel lane, the overlay shall extend to the centerline of roadway. Where utility patches
extend into both travel lanes then a full width overlay is required.
Revised. Utility patches updated accordingly.
10. Coordinate utility work and final restoration with adjacent commercial development project at the
NE corner of 2nd and Main as they have an obligation to pave a portion of 2°d Ave.
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ENGINEERING ph.425.778.8500 1 f.425.778.5536
www.cgengineeri ng.com
Graphite Art Studio 16259.22 May 14, 2018
Comment Response — Engineering #1 Page 7 of 9
Added note. See Note 10.
11. It appears that detail 2 is not being used. Please remove from this plan sheet. If this detail is to be
used, it may only be used on private property and needs to be referenced as such.
Detail removed.
12. Please insert the City detail for pavement within City right of way.
Any pavement work will be done per Detail 4/C5.1. A paving legend can also be found on this
sheet that differentiates between areas that are "new asphalt" vs "grind and overlay existing
asphalt".
13. Any work to be completed at curb bulb outs (demo, install, etc.) shall be coordinated with City of
Edmonds Engineering and Parks Departments.
Added note. See Note 11.
Sheet C5.2 — SITE AND STREET IMPROVEMENT DETAIL
1. Please change the title from 'Plan' to 'Details'.
Revised.
2. Remove detail 3 a street sign is not required.
Detail removed.
3. Remove detail 5 and add a site -specific ramp detail.
Detail removed. See details 3, 4, and 5 on C3.1 for site -specific ramp details.
Sheet C5.3 — SITE AND TRAFFIC CONTROL PLAN
1. Disruption fees will be charged for closure of parking stalls and sidewalk areas. Clearly specify areas
of closure and indicate the timeframe for which you request the closure.
Revised. See notes 3 and 4.
2. Note 3 —Work Zone 1— Add a note that a temporary ADA accessible ramp to be installed.
Revised.
LANDSCAPE PLAN
1. Although a landscape plan is not required at this time, the location of proposed landscaping needs
to be shown so that the City can verify that there is no conflict with utilities and to ensure that the
proposed project will meet the landscape requirements.
250 4th Avenue South, Suite 200
C Edmonds, WA 98020
ENGINEERING ph.425.778.8500 1 f.425.778.5536
www.cgengineeri ng.com
Graphite Art Studio 16259.22
Comment Response — Engineering #1
Noted. Street trees referenced with potential species on C5.1.
STORMWATER ENGINEER REVIEW
Review Comment:
1. C2.1: Show extents of the storm drain demolition/removal
Revised.
2. C3.1: Provide unique identifiers (numbers or letters) for each new or altered CB.
Revised. Markers and catch basin schedule added.
May 14, 2018
Page 8 of 9
C3.1: Revise plans as needed to more clearly show how Main St. runoff will be collected:
a. Revise and/or show more grading to demonstrate that the existing CB will be the low point, OR
b. Provide new/replaced CB at low point before bulb -out.
Revised. Existing spot elevations near centerlines of roadways have been added to show that
runoff will slope towards the catch basin.
4. C3.1: Revise basement drainage note to read "Basement drainage to sanitary sewer per plumbing
plan".
Revised.
C3.1: The wye connection for the alley -side footing drains must occur on -site or at a CB; revise plans
as needed.
Footing drain added to CB #2.
6. C3.1: It appears that there is an additional City storm drain connection upstream of the revised alley
CB which is not reflected on the plans; see GIS screenshot below. Field verify and update plans (or
provide written response) as needed.
a. Engineer should verify that a Type I is still structurally sufficient for the proposed connection
configuration.
Revised. CB now shown.
7. C3.2: It appears that the dead-end configuration of the detention tank requires the installation of
an air vent pipe between the top of tank and control structure manhole. Provide pipe or written
response to address this concern.
a. Reviewer believes that air will be trapped in the top of the tank once the pipe fills above the top
of the 36" pipe; therefore, runoff will not be able to push into the tank to utilize the upper 2' of
storage unless this air has a release point.
250 4th Avenue South, Suite 200
C Edmonds, WA 98020
ENGINEERING ph.425.778.8500 1 f.425.778.5536
www.cgengineering.com
Graphite Art Studio 16259.22 May 14, 2018
Comment Response — Engineering #1 Page 9 of 9
b. An open grate vent/cleanout pipe from the top of the tank to the surface may serve the same
purpose.
Revised. Vent pipe added. See detail 1/0.2.
C3.2: Provide bedding and subgrade information, as needed for construction, below the detention
tank.
Note added per DOE manual. Geotech to specify bedding information.
9. C3.2: Provide additional detail and/or notes to clarify how/what the detention tank end cap
materials and method for securing in -place will be.
See Contech shop drawings attached to this comment letter.
10. SH Sheets: Structural sheets generally directs to move foundation/footing to bottom of detention
tank, but detail on civil plans suggested this needs to go to the bottom of the control structure,
which is lower. Update notes on SH sheets, or detail on civil sheets, to be consistent with each
other.
Updated. See shoring sheets.
If you have any questions or comments regarding the responses to this review, please do not hesitate to
call.
Sincerely,
CG ngineeri g
Gre G1 illen, PE, SE
Princ I
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ENGINEERING ph.425.778.8500 1 f.425.778.5536
www.cgengi neering.com
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