20161212100618.pdfV Lovell-Sauerland and Associates, Inc. Phone: 425-775-1591
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Lynnwood, Washington 98036
Surveyors / Engineers / Planners / Development Consultants
JoAnne Zulauf
Engineer Division
City of Edmonds
Re: BLD20160598, Brackett Court
21276 80th Avenue W, Edmonds
Dear Ms. Zulauf
November 22, 2016
LSA No. 5537
1
This letter is to address the review comments made by the Engineer Department on July 26,
2016. The numbers of the responses correspond to the comments on the review. I will attempt
to point out how and where the comments have been addressed on the attached revised plans
and reports.
GENERAL
1. The King County Site Improvement Bond Quantity Worksheet has been included with this
submittal.
2. Sheet C8 - "Traffic Control and Haul Route Plan" has been added with this submittal.
3. "City Subdivision File" has been replaced with "Building Permit #: BLD20160598".
4. "Preliminary' has been removed from Drainage Plan, Civil sheet index and all sheet titles.
5. The new tax parcel number (after the lot consolidation) for the property is
00373600300103.
STORM DRAINAGE REPORT:
1. The condition of the soil unit at bottom of trenches should be verified by a Geotechnical
Engineer during construction, and to determine whether the soil suitability criteria for
infiltration treatment are met. Applicable criteria has been documented. If the soils do not
meet the soil suitability criteria, a minimum depth of 18 inches existing soil shall be
replaced with engineered soils that will meet the criteria.
2. Both infiltration trenches (#1 and #12) are now capable to fully infiltrate the roof runoff.
3. The default value of 0.33 in WWHM3 was used.
4. The information at the bottom of the page has been deleted.
5. The depths to reach the underlying outwash layer are varied (5.5' at TP-1 and 7.0' at TP-
3). "Geotechnical Investigation" prepared by Liu & Associates, Inc., dated June 15, 2015,
recommended trenches should be cut at least one foot into the targeted advance outwash
layer, which resulted in excavation to about 6.5' and 8.0' deep or more at TP-1, and TP-3
respectively. The Geotechnical Report prepared by GEO Group Northwest, Inc., dated
December 1, 2015, was to review the Liu and Associates report, confirm soil conditions at
the proposed infiltration system location, and evaluate the proposed infiltration system
prepared by Lovell-Sauerland & Associates, Inc.
Additional test pits were performed on September 26, 2016. The bottom of the infiltration
trenches are revised to elevations which would be deep enough to reach the underlying
outwash layer.
6. Infiltration trench lengths for #5 and #8 have been revised.
7. As stated in "Geotechnical Investigation" prepared by Liu & Associates, Inc., dated June
15, 2015, page 5 , bottom paragraph "Both Test Pits 1 and 3, located on the east side of
the site, ......", TP-2 as shown in Plate 2 should read as TP-3.
8. See "Responses to City of Edmonds 7/26/2016 Review Comments" prepared by Liu &
Associates, Inc., dated November 12, 2016. (End of Appendix B in the revised Drainage
Report).
9. Three addition test pits were performed on September 26, 2016.
10. WWHM Project Reports are included at end of each infiltration trench design in Section C
11...
Civil Plan Review:
Sheet C1 — Cover Sheet and Existin i Conditions
1. Stormwater and gas purveyor information have been added.
2. General Notes
a. Note #1: "2014 WSDOT" has been revised to "2016 WSDOT";
b. Note #1: DOE Stormwater Management Manual has been specified to 2005
edition;
c. Note #5 has been revised;
d. Note #19 has been revised to reflect current plan.
Sheet C2 — Stormwater Pollution Prevention Plan
3. Comment has been addressed.
4. The 100' of pavement to be retained for the construction entrance has been outlined.
5. Protection fencing around each of the proposed infiltration trenches has been added.
6. Note #7 has been added.
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7. Comment has been addressed.
8. Comment has been addressed.
9. Footing drains - Comment has been addressed.
10. Drainage Construction Note #3 has been removed.
Sheet C4 — SewerfWater Plan
11. Public Sewer Main has been shifted towards the center of the southbound lane per
separation requirements.
12. City of Edmonds Standard Details for Sewer Clean -out E6.2 and Typical Trench
Section E4.2 have been added.
13. Clean outs at the end of lines have been replaced with manholes.
14. Sizes of pipe between private sewer lines and residences have been added.
15. Note #9 has been added.
16. Labels to manholes on drawing and detail have been corrected.
17. Comments have been addressed. Four (4) separate 2 inch taps are connected
directly to the existing 16-inch trunk line, The meters can be manifold at the property
line. Existing meters on 212th and 801h have been noted to be cut and capped, and
will be reused wherever possible.
18. Fire sprinkling is not required. The meters will be W with 1" water service.
19. The sizes of the existing meters (3/4") have been noted.
20. The "WM" label for the existing water meter has been relocated.
21. 1" irrigation meter has been added (south side north entrance).
Provide addition lane sheet:
Sheet Cx — Sewer/Water Plan
22. Dimensions of drive aisles have been added (see sheet C3).
23. Parking spaces have been labeled (see sheet C3).
24. Onsite sidewalk grade will be flush with access road and parking stalls.
25. Areas of "no parking" have been striped (see sheet C3).
26. Trash bin location: A low fence at the end of the parking spaces in-between the units
have been added (see sheet C3).
27. Trash enclosure is not required.
28. Sidewalks are 7' wide on both 212th Street SW and 80th Avenue W (see sheet C5).
29. Access approach has been revised to City of Edmonds standards, E2.27.2 multi-
family entrance (see sheet C5).
30. The curb/ramp has been replaced, and designed to meet current ADA requirements.
WSDOT standard detail has been added.
31. In order to construct the new curb/ramp fully within the right of way as shown in the
plan, curb radius need to be reduced to 18.5 feet (existing curb radius is approximate
21 feet).
32. Existing crosswalk stripings on both 212th Street SW and 80th Avenue W have been
added.
33. Existing curb/gutter and rolled curb within the project construction limits will be
replaced with standard 18" curb/gutter (see sheets C2 and C5).
34. All sawcuts have been added in right of way (see sheet C5).
35. City of Edmonds standard details have been added (see sheet C7).
Sheet L-01 — Landsca a Plan
Responses to be provided by the Landscape Architect,
Thank you for your time and effort in this review. If you have any questions or need additional
information, please do not hesitate to call.
John Yuen