BLD20090065_Engineering Comments 1.pdf
DATE: February 25, 2009
TO: Max Craddock, P.E.
maxc@brhinc.com
FROM: Jeanie McConnell, Engineering Program Manager
Jerry Shuster, P.E., Stormwater Engineering Program Manager
RE: Application #: BLD20090065
Project: Scotts Bar & Grill
th
Project Address: 8115-244 St SW
During review of the above noted application, it was found that the following information,
corrections, or clarifications are needed.
GENERAL
1.Any work proposed within SR-104 state right-of-way shall be reviewed and approved by the
state prior to commencing construction. The City of Edmonds cannot give approval for this
work.
2.Please provide copies of recorded easement/agreement documents for the access easement
across the property to the east (WAMU), as well as for the storm system in the south parking
lot.
Sheet C0.1 COVER SHEET
1.Please revise General Notes as follows:
#1 Revise WSDOT to read: Current WSDOT Standards and Specs.
#5 Trench backfill with CDF is only required by the City on certain arterials. Please
remove requirement unless intent is to backfill on-site storm system trenches with CDF.
2.Please remove Strom Drainage Note #12.
Scotts Bar & Grill Parking Lot
Sheet C1.0 EROSION CONTROL PLAN
1.Standard details have been referenced on sheet C3, but details are actually found on sheet
C1.1.
2.Reference catch basin protection detail E1.3/sheet C1.1 on this sheet.
3.Please add notes to plans: WSDOT approval required prior to any grading or clearing
activities within SR-104 right-of-way.
4.Please revise reconstruction meeting under Construction Sequence item #1 to state pre-
construction meeting.
Sheet C2.0 SITE PLAN
1.The drive aisles in the parking area to the west of the building meet the minimum 24 width
for two-way drive aisle. Please revise plans to clearly show drive aisle and remove one-
way notation near the SW corner of the building.
2.Please provide one-way or entrance only signage at the entrance to the one-way parking area.
3.Please provide do not enter signage at the exit of the one-way parking area.
4.Drive aisles for one-way traffic shall be a minimum of 12 in width. In a couple areas the
plans provide a dimension of 11.5. It does not appear as though the paving is limited to the
11.5, but it is confusing. Please revise plans to clearly differentiate between drive aisle
widths and fire access minimums.
5.Please provide a parking and striping plan that clearly shows removal of parking stalls, re-
striping of existing, striping of new stalls, one-way and two way arrows, no parking and fire
access/lane (if required by fire dept.), etc.
6.Modular block wall details are provided on sheet C2.1 not C3.1. Please revise.
Sheet C2.2 GRADING PLAN
1. Block wall, pavement and curb details are provided on sheet C2.1 not C3.1. Please revise.
Sheet C3.0 STORM DRAINAGE PLAN
1.Please provide structural calculations for the vault. Vault design & calcs will be sent out for
peer review.
Please contact me at 425-771-0220 or by e-mail at mcconnell@ci.edmonds.wa.us if you have
specific questions regarding these plan corrections.
Page 2 of 3
Scotts Bar & Grill Parking Lot
The following comments are provided by Storm Water Engineer Jerry Shuster:
Items reviewed:
Stormwater Report dated January 30, 2009
·
Plan sheet C3.0 and C3.1
·
Stormwater Report
The first paragraph on page 1 and the figure on page 5 (Detention Subbasin Plan) indicate that
0.18 acres of new impervious will be added to the site. The 0.18 acre value is used in the
modeling for both the existing and developed condition. It is unclear from the submittal whether
any pervious surfaces (such as landscaping) will drain to the vault. If there is any pervious
surface that drains to the vault it must be included in the modeling for completeness. If not,
please state it in the report.
Page 6 indicates the modeling was performed using a 12-inch diameter riser. Plan sheet C3.1
shows an 8 inch diameter riser. Please reconcile.
The table on Page 15 (Conveyance System design) has a Total Q value of 0.122 cfs from the
vault to CB#3 for the 25-year, 24-hr storm. It is unclear where this value originates. The 25-year
peak flow from the vault (page 7, Hydrograph 2) is approximately 0.01 cfs. This also affects the
Total Q value for the pipe from CB#3 to CB#4 and CB#4 to CB#5. Please redo this table or
explain the origin of the 0.122 cfs.
Include proper operation and maintenance instructions for the wet vault in the stormwater report.
Plan Sheet C3.0
Wet vaults should have a grate over the top per the 2005 Ecology Stormwater Manual. The grate
allows air to contact the wetpool to minimize stagnant conditions which can result in oxygen
depletion. This comment also applies to Plan Sheet 3.1.
Plan Sheet C3.1
Detail 3 should show the diameter of the riser above the FROP-Tee to insure it is large enough
for maintenance access to the vault. Also, the maximum riser height above the top of the vault
should be called out as 18 inches.
Please contact Jerry Shuster at 425-771-0220 or by e-mail at shuster@ci.edmonds.wa.us if
you have specific questions regarding these plan corrections.
Page 3 of 3