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ENGINEERING
March 27, 2017
civil &structural
engineering & planning
Jennifer Lambert, Engineering Technician
City of Edmonds
121 5th Avenue N
Edmonds, WA 98020
RE: Application #BLD20161520
Project Name: Edmonds Village
Project Address: 22019 Highway 99
Dear Ms. Lambert,
RESUB
MAR 2 8 2017
BUILDING DEPARTMENT
CITY OF EDMONDS
Itemized below is our response to the review comments in the February 24, 2017 letter for the above
referenced project. Our response appears in bold.
GENERAL
1. Provide an itemized engineers 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. The amount of the bond will be based on 120% of the City approved estimate for the
off -site improvements.
a. A 3.3% inspection fee is calculated for the project based on 120% of the City approved estimate
for the entire project improvements.
Bond Quantity added (see drainage report and attached extra copy)
2. As changes are made to each plan sheet, please make sure that the other plans sheets are revised
accordingly.
Noted.
3. As stated during the design review application, please provide a complete Traffic Report addressing
queuing for the proposed drive-thrus.
Provided with Resubmittal.
4. 4. Trash enclosure locations should be consistent between all plan sheets. Please revise the plans
accordingly.
Area has been updated as noted.
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph. 425.778.8500 1 f. 425.778.5536
www.cgengineering.com
Edmonds Village Retail CG #16175.20
ENG1 Comment Response
March 27, 2017
Page 2 of 11
Sheet C1.1 — COVER SHEET AND GENERAL NOTES
1. The haul route stated is accurate when leaving the site. When entering the site, the haul route shall
be SR-104 to Highway 99. Please show the haul route on a map.
Route updated.
2. Please revise note 35, from linda.mcmurphy@ ... to jeff.kobylk@...
Updated.
Sheet C2.1 —TEMPORARY EROSION CONTROL PLAN
1. Revise the title of this plan sheet to 'Temporary Erosion Control and Demo Plan'.
Added.
2. Show job shack location, if any.
Added.
3. Add notes to the plans for the removal of the driveway approaches on Highway 99 and replacement
with curb/gutter to City Standards.
Note added.
4. Show stockpile location and indicate requirements to keep it covered.
Noted added.
5. Standard Detail E1.3 shown on the plans is an older version. Please revise to the current version.
Detail updated.
6. Will a chain link fence be installed during construction? If so, please show location on the plans.
Sidewalk along Highway 99 property frontage shall remain open except as needed to perform
specific activities such as sidewalk replacement and utility connections.
Added.
7. Please show the sewer being cut and capped a minimum of 20' from the existing or proposed
foundations, whichever is greater.
Added and show on plans.
8. Please note on the plans for the water service line be cut and capped at the back of meter and a
spigot with AVB to be installed during construction.
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph. 425.778.8500 1 f. 425.778.5536
ENGINEERING www.cgengineering.com
Edmonds Village Retail CG #16175.20 March 27, 2017
ENG1 Comment Response Page 3 of 11
Note added.
Sheet C3.1 —GRADING AND DRAINAGE PLAN
1. Notes:
a. Revise note 1 such that it states, that there is a minimum of 3' separation requirement between
the dry utilities (power, gas, phone, cable, etc.) and sewer, water, and storm and 5' from any
City owned lines.
b. Revise note 2, to state 'Remove & Replace existing sidewalk within the right-of-way...'
c. Please move note 2 to sheet C5.1.
Notes revised as noted.
d. This site is classified as a Large Site. Please revise note 3 accordingly.
The land disturbing activity is less than an acre and therefore still a small site category 2. We
verified this during the comment response period just to be sure.
Impervious Areas chart: Provide a breakdown for all the impervious surfaces.
a. Existing impervious area not mitigated.
b. Impervious area required to be mitigated.
c. Proposed impervious area to be mitigated. This area may be larger than required due to slopes
of the existing parking areas. System shall be designed for all flows directed to the system.
d. How much area the proposed system is designed for.
Added to plans (except item a, the project is generally on one parcel with small areas on other
parcels of the parking lot which are controlled by the same owner).
3. Any areas where the parking lot, structures, etc. will be removed to bare soils will need to be
counted as replaced mitigated impervious area and added to the impervious area required to be
mitigated.
4. Please clearly show which areas will be collected and discharged to the onsite stormwater
management system. This area may be larger since some surface runoff areas of the existing
parking lot may not be able to be separated from the new.
Noted. This is clarified better on the plans and in the drainage report for this submittal. Some of
these areas are swapped with existing areas to remain.
5. Please note that the City requires a minimum of 4" tightline to be used not 6" (as stated on the
plans). Revise plans if you choose.
We would like to use 6"
6. Catch basin schedule chart:
a. Number 2 — Please label as the control structure.
b. Number 3 -What does 'To be sized for construction drawings' mean?
= CM
ENIGINCRERING
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph. 425.778.8500 1 f. 425.778.5536
www.cgengineering.com
Edmonds Village Retail CG #16175.20
ENG1 Comment Response
Table modified as noted.
March 27, 2017
Page 4 of 11
7. Please add a note that if the rim to invert exceeds 5' a type 11 manhole will be required.
Added.
8. The plans show the storm filter system connecting to the detention system in the middle of the
detention pipe. Please revise the plans to show the connection at a structure.
Revised as noted.
9. Trench drains are not permitted in commercial parking lots because there needs to be catch. Please
show surface water runoff from the parking lot sloped to catch basins.
Changed to Type I CBs
10. Please label the trash enclosures. Please note that if the north trash enclosure is installed as shown,
one way striping around the enclosure will be required.
The trash enclosure has been updated to better fit the parking area, and a landscape island has
been added nearby per design review comments.
11. Show all the dry utilities (power, phone, cable, gas, etc.) on this plan sheet such that utility
separation can be verified.
Added.
12. The plans state that the detention system will be CMP; however this pipe material is not permitted
(See handout E72A). Please revise the plans accordingly.
Changed to CAP pipe.
STORMWATER REPORT
Background
This is classified as a Large Site Project. Large Site Projects are subject to Site Minimum Requirements 1,
2, 3, 4, 5, 6, 7, 8, 9, 10, and 11.
Project is Small Site Category 2 (less than 1 acre land disturbing activity). Since this has great effect on
the manner of sizing, we have confirmed this via email.
MillinlUrn Requirement #1 — Preparation of Stormwater Site Plan
Comments:
Drainage Report, Section III, Page 1, "Peak Flows (prior to detention)" appear to be Peak flows after
detention.
250 4th Avenue South, Suite 200
4M Edmonds, WA 98020
U ph. 425.778.8500 1 f. 425.778.5536
ENGINEERING www.cgengineering.com
Edmonds Village Retail CG #16175.20
ENG1 Comment Response
Revised as noted.
March 27, 2017
Page 5 of 11
2. Sheet C3.1, Catch Basin 2, Minimum distance between knockouts (36" Dia. CIVIP) is not achieved. 8"
min. for 54" Dia., 12" for 72" Dia. Add at least 0.5" to 36" Dia. CMP for conflict analysis.
3. Sheet C3.1, Catch Basin 9, Type 2 54" Dia. MH, same comment as Catch Basin 2.
Detention system rearranged per this and other comments.
4. Drainage Report, Section 111, Page 2, D, detention pipes are described as 46-foot long while Sheet
C3.2 describes detention pipes as 48 LF.
Revised
5. Sheet C3.1, Catch Basin 7, 8" (N) shown as 347.5, yet calculates as 347.85. At 347.5 the pipe will flow
uphill to Catch Basin 8 (347.8).
This was a typo that should have been 347.9 (0.1 ft drop in CB). Revised.
6. Sheet C3.1, 8 parking stalls to the north of detention tanks appear to be un-treated and un-
detained.
Correct. There is a large area of existing pavement between the building and Highway 99 that will
remain. It is larger than the area of pavement that is difficult to provide flow control and water
quality for. This "swap" is defined on the C3.1 page of the drawings
Sheet C3.1, Catch Basin 3, inlets into a detention tank are placed at the upstream structure to
permit flow through sediment collection.
Revised so that the MWS flows into the structure at the beginning of the system (roof drains still
go at approximately mid span).
8. Sheets C3.1 and C3.2, The MWS specifies an operating head of 3-feet. It appears that the HGL will
exceed the rim elevations at several points in the system.
System lowered to below rim elevations.
Minimurn Requirement # 6 — Runoff Treatment
Comments:
Sheet C3.1, Catch Basin 3, for the MWS to precede the detention system the water quality design
flow rate: "The flow rate at or below which 91% of the runoff volume, as estimated by an approved
continuous model, will be treated." Please provide the analysis of this upstream treatment
performance.
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph. 425.778.8500 1 f. 425.778.5536
(ENGINEERING www.cgengineering.com
Edmonds Village Retail CG #16175.20
ENG1 Comment Response
March 27, 2017
Page 6 of 11
This analysis was buried in the WWHM readout and has been better clarified in the updated
drainage report. All the area routed to the water quality and flow control is considered and the
on-line flow rate is used.
Minimum Requirement #9 —Operation and Maintenance
Comments:
1. The O&M needs to include the MWS.
Added.
Minimum Requirement # 10 — Offsite Analysis and Mitigatio
Comments:
1. No offsite analysis provided
Added to report. Small Site Category 2 projects under old code only asks for this if required by the
drainage reviewer.
Minimum Requirement #11 — Financial Liabilit
Comments:
The reported King County site improvement bond quantity worksheet is not in the submittal
package.
Added.
Sheet 3.2 — GRADING AND DRAINAGE DETAILS
1. The control tee should be PVC and no shear gate handle. Please revise the plans to be consistent
with Edmonds Standard Detail E5.4.
Revised and added detail E5.4
2. Add rim elevation to the flow control detail.
Added.
3. Add a note to the flow control detail that a minimum of 2' of cover is required under drivable
surfaces and V of cover under landscape areas.
Added.
Sheet 4.1 — WATER AND SEWER PLAN
GENERAL
1. Revise note I such that it states, that there is a minimum of 3' separation required between the dry
utilities (power, gas, phone, cable, etc.) and sewer, water, and storm and 5'from any City owned
lines.
Revised.
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph. 425.778.8500 1 f. 425.778.5536
CEINIGINGERING www.cgengineering.com
Edmonds Village Retail CG #16175.20
ENG1 Comment Response
March 27, 2017
Page 7 of 11
WATER
1. The proposed plan states that the existing water meter is to be re -used and relocated. It appears
that the existing water service line from the water main to the meter is a W, water line and meter.
a. The required size of the water meter will need to be verified under the plumbing permit.
b. Any connections on the demand side of the meter will need to be addressed under the
plumbing permit (i.e. irrigation, fire sprinkler, etc.).
Existing meter to be reused for irrigation. Two I" meters will be wet -tapped to serve the
building.
2. If irrigation is to be connected off of the existing water service line, it will need to be connected after
the meter and the backflow prevention device shall be installed after the connection (all within
private property). The City will not provide a separate meter off a single tap.
Irrigation meter is now separated.
3. If two meters are desired, the City requires two taps on the main line. Typically the existing service is
used for the irrigation and the new tap is used to provide water to the structure.
Revised as noted.
4. Is there a reason that a V meter is to be installed for irrigation?
The existing meter is now to be used for irrigation.
5. Please show the back of the water meter located at the property line (where the water meter is
located within the right-of-way).
Revised
6. Please label the size of the water service line (minimum 1") and note the pipe material and tracer
wire.
Revised
7. Please add a note to install a storz adapter on the existing fire hydrant.
Noted.
r,P\A/PP
1. Label the pipe material and size.
Added.
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph. 425.778.8500 1 f. 425.778.5536
ENGINEERING www.cgengineering.com
Edmonds Village Retail CG #16175.20
ENG1 Comment Response
2. Please show the sewer line from the structure to the main.
March 27, 2017
Page 8 of 11
We are unclear as to how all of the sewer plans connect and have specified that this needs to be
tv'd and verified prior to the start of utility construction. Survey was only able to pick up cleanouts
on the east side of the existing building to be derno'ed, the Harbor Freight and the Commerical
building at the corner. The sewer card provided (Permit No. 08072) provides additional clarity but
some distances between surveyed cleanouts is off considerably. We have attempted to
interpolate between survey, GiS and sewer card to address this comment.
3. Show the sewer easement so that it is clear where the sewer lateral is located.
To our knowledge there is no existing sewer easement on the property.
4. Please show the invert elevations at the main and the structure so that slope (minimum of 2%) and
coverage (minimum 2') can be verified. if the slope of the pipe exceeds 20% the pipe will need to be
anchored.
This has been noted on the plan. Elevations of existing are unknown and will need to be verified.
5. Please add a note that the existing side sewer will need to be TV'd by the applicant and submitted to
the City for review and approval to re -use.
6. Please add/revise note 2 that the sewer lateral will need to be TV'd by the City of Edmonds, Sewer
Department, to determine if the line can be re -used. If the line is damaged or not a 6" line from the
main to the property line, the sewer lateral will need to be replaced.
it is unclear whether the applicant or sewer department should TV this pipe. A note indicating
both is added.
7. The plans state 'Exist ss stub to remain, see note T; however there is no note 3. Please revise the
plans accordingly.
Revised.
SHEET CS.1 — STREET IMPROVEMENT PLAN
1. Revise the title to 'Site Improvement Plan'.
Added.
2. Show the northbound travel lanes on Highway 99.
Shown. They are noted as not surveyed, shown for graphical purposes on this sheet.
3. Show the crosswalks on the plans (Highway 99 & 220th).
Shown. They are noted as not surveyed, shown for graphical purposes on this sheet.
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph. 425.778.8500 1 f. 425.778.5536
ENGINEERING www.cgengineering.com
Edmonds Village Retail CG #16175.20
ENGI Comment Response
March 27, 2017
Page 9 of 11
4. Please add a note to the plans that any striping (curbing, crosswalk, centerline, etc.) disturbed
during construction shall be restriped, as required, prior to project completion.
Note added.
5. Please show all utility poles, signage, mailboxes, etc. on this plan sheet.
Added.
6. Please add a note to the plans that if the sidewalk does not meet ADA requirements, is currently
damaged or damaged during construction, the sidewalk will need to be replaced.
Note added.
7. Per Edmonds City Code and Community Development Code, 18.80.060, the driveway width shall be
30'. Please revise the plans accordingly.
Driveway width revised.
8. Show the driveway approach per Edmonds Standard Detail 2.26.
Updated detail.
9. Show all final asphalt restoration (including in the right-of-way). Please add a note that depending
on the number of utility patches and locations, a 2" grind and overlay may be required. An
inspection will be required to determine final restoration requirements/limits.
Note added, additional asphalt restoration shown.
10. Please add a note to the plans that 2' minimum asphalt cut may be required when replacing the
curb/gutter. An inspection will be required to determine final restoration requirements/limits.
Note added.
11. Show all required striping and signage set forth by the Fire Department.
None was noted in pre -application notes or are existing on the properties in the shared parking
lot. We coordinated with Fire District 1 and they have asked for curbs to be painted yellow with
"No Parking — Fire Lane" painted in 12" letters every 50 feet.
12. Label the parking stall dimensions (minimum 8.5' by 165), aisle width (24' for two-way traffic), etc.
Added.
13. Callout striping, one way arrows, etc.
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph. 425.778.8500 1 f. 425.778.5536
CEINIGINEERING www.cgengineering.com
Edmonds Village Retail CG #16175.20
ENG1 Comment Response
Added.
14. Provide a detail for the directional arrows.
Added to CS.2
15. Please provide a detail for the trash enclosure.
Provided in the Architectural Plan set, detail 9/A8.1
Sheet C5.2 — STREET IMPROVEMENT DETAILS
1. Revise the title to 'Site Improvement Details'.
Revised.
2. Please replace Edmonds Standard Detail E2.27.2 with E2.26.
Replaced.
March 27, 2017
Page 10 of 11
3. No curb ramps are being replaced in the right-of-way; therefore, please remove detail E2.16 and
E2.23.
Revised
4. Please label detail 5 as 'Typical Pavement Section on Private Property'.
Updated.
Sheet C5.3 —TRAFFIC CONTROL PLAN
1. Revise plan note 3 to state the City approved work hours.
Updated.
2. Show the northbound travel lanes.
Shown. Please note these are not surveyed.
Sheet L-1.0 LANDSCAPE PLAN
1. Show the utilities, poles, mailboxes, signage, etc. on this plan.
All utilities, signs, water meter and fire hydrant have been added to the plan.
2. Maintain a minimum of 3' clearance around fire hydrants, water meters, manholes, etc.
All planting has been removed or moved 3' away from all hydrants, meters and signs, along with a
note added to call this out
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph. 425.778.8500 1 f. 425.778.5536
ENGINEERING www.cgengineering.com
Edmonds Village Retail CG #16175.20
ENG1 Comment Response
March 27, 2017
Page 11 of 11
3. Show that the landscape is placed such that it will not block the fire department connections, if
needed.
All landscaping has been removed around the fire hydrant to not block fire department access.
Sheet A1.02 — SITE PLAN
1. Remove the parking lot dimensions from this plan sheet.
Will comply.
2. Trash enclosure locations should be consistent between all plan sheets. Please revise the plans
accordingly.
Base map made consistent between plan sheets.
If you have any questions or comments regarding the responses to this review please do not hesitate to
call.
Sincerely,
CG Engineering
C. Chevy Chase, PE, SE
Principal
250 4th Avenue South, Suite 200
Edmonds, WA 98020
ph. 425.778.8500 1 f. 425.778.5536
ENGINCEERING www.cgengineering.com