bld201100692-76_Ave_W-21605-Swedish-E1.pdf
CITY OF EDMONDS
PLAN REVIEW COMMENTS
ENGINEERING DIVISION
(425) 771-0220
CityWebsite: www.ci.edmonds.wa.us
DATE:9/21/11
TO:Brad Hinthorne
Brad.hinthorne@perkinswill.com
FROM:Jennifer Lambert, Engineering Technician
Jerry Shuster, Stormwater Program Manager
RE:Application#:bld20110692
Project:Swedish Medical Center –Puget Sound Cancer Center
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Project Address: 21605–76Ave W
During review of the above noted application, it was found that the following information, corrections, or
clarifications are needed. Please redline plans or submit three (3) sets of revised plans/documents with a
written response to each of the items below to Linda Thornquist. City of Edmonds handouts, standard
details and development code can be referenced on the City website.
GENERAL
1.Please provide an itemizedengineerscost estimate, including units and unit prices,for both on-site
and off-site (right-of-way) improvements, including traffic control. The City recommends use of the
King County Site Improvement Bond Quantity Worksheet.
Inspection fees for this project will be calculated at 2.2% of the 120% City approved estimate for
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all improvements.
2.Please submit a traffic control plan for review and approval.
3.Please include a City of Edmonds approval block on the plan sheets that states Approved by: City
Engineering Division.
4.Provide utility purveyor information on the sheet index.
5.Per the ROW application received by Dan Beason with Skanska, it appears that the intention is to
remove a section of curb/gutter on Highway 99 for the entrance of the construction crews.
a.Please show on the civils the work required to remove the curb/gutter to add the proposed
driveway entrance. Please also show the replacement of the cur/gutter.
Traffic Impact Analysis
1.Please complete the traffic impact worksheet and submit for review and approval.
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Sheet C-110–General Notes:
General Notes:
1.Please change note #20 to say, “All disturbed soil areas shall be compost amended and seeded or
stabilized…”.
Water Service Notes:
2.Change Note # 3 to say, “…grounded at the meter and structure and taped…”.
Sheet C-200–Building Demolition & TESC Plan
1.How is the project going to be phased?
a.Can some of the asphalt remain within the construction area and be used as your
construction access?
b.If the entire area is intended to be demoed at the same time, the filter socks will need to be
added in the surrounding downstream catch basins.
2.The Temporary Drainage Swale Detail is on page C-232not C-231. Please revise plans accordingly.
3.Existing hydrant needs to remain accessible at all times. Please revise plans to show access to the
hydrant and how the hydrant will be protected during construction.
Sheet C-210–Parking Demolition& TESC Plan
1.Some of the notes on the plans are covered by survey data. Please revise accordingly.
2.Please add a note that the temporary sediment pond will be cleaned prior the operation of the
stormwater system.
3.Please show the detail for the note on the plans that refers to the catch basin with the permanent
control structure.
4.It appears that theremay be an error in the note referring to the catch basin with the permanent control.
Please revise plans accordingly.
Sheet C-232–TESC Details
1.Temporary Sediment Pond Detail
a.Please reference the sheet number this detail refers to.
b.Please reference the permanent flow control structure detail and sheet number.
Sheet C-300–Building Paving & Horizontal Control Plan
1.Drive aisle on north side of building must be a minimum of 24’. Please revise plans accordingly.
2.Please add ‘typ’ for parking stalls dimensions.
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Sheet C-310–Parking Paving & Horizontal Control Plan
1.Please add ‘typ’ for parking stalls dimensions.
2.Some of the notes on the plans are covered by survey data. Please revise accordingly.
3.There is a square rock pad at the north property line. What does the purpose of the rock pad?
4.There is a gate showing near the gravel access roads. Is this gate for access?
5.Per the Landscape Plan there is a gate located at the southeast corner of the parking area. What will
the surface from the gate access to the gravel access be?
Sheet C-420–Grading Sections
1.It does not appear that the cross sections on this sheet refer to the correct civil sheet. Please revise
plans accordingly.
Sheet C-330–Paving Details.
1.Please note that engineering willnot be inspecting curb ramps installed within private property.
Please confirm with the building department if they require inspections and adjust notes accordingly.
2.Please add a detail for the wheel stops and reference on plan sheets accordingly.
Sheet C-400 & 410–Building Grading Plan
1.Please show the grading calculations.
2.Sheet 410 -Please provide a spot elevation on the North end of the swale for the media filter drain.
3.Please provide additional information regarding fence and gate access shown on C-410.
Sheet C-401–Building Grading Blow-Ups
1.Please note that the elevations difference from the curb on the east side of the drive aisle to the
opening of the west curb of the drive aisle is so slight that it may be difficult to achieve proper
drainage flows during construction. You may consider making adjustments at this time.
Sheet C-500–Building Utility Plan
1.Please showall private and public easements.
2.Please revise the impervious surface chart to include all areas of impervious surfaces that were
constructed after 1977 as new. When you deductthearea that is being mitigated byan existing
stormwater management system from the total regulated impervious area, your amount of regulated
area not yet mitigated should equal 51,718 sqft. Please make sure to separatethe 51,718 sqft into LID
and conventional stormwater systems as directed in the impervious surface chart.
3.The Site Plan indicatesthat the fire hydrant is to be raised. Please add note to civil plans or revise Site
Plan accordingly.
4.The proposed connection to the city watermain states that the watermain is a 6” line. The watermain
is actually 8”. Please revise plansaccordingly.
5.Please revise plans to show that 2-6” MJ couplings will be 8” MJ long body couplings.
6.Please move the valve is shown adjacent to the coupling such that the valve is flanged to the tee.
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7.Please callout the thrust blocks (located at 90°’s and at tee).
8.Please revise noteto showthat the RPBA will be located outside in hotbox per Standard DetailE7.11.
9.Please show that the water meters are located within the easement. If there is not an easement, an
easement will need to be provided to the Cityprior to final project approval.
10.The DCVA for the landscape irrigation line shall be located just south of the water meter.Please
show the DCVA on the civil plans and reference City Standard Detail E7.7.
11.Please show a sewer cleanout within 2’ of the building.
12.Please show a cleanout for the side sewer at the edge of the sewer easement.
13.Please show a 12”locking lamphole cover with ½” hex boltsat the sewer cleanout located at the
easement.
Sheet C-210–Parking Utility Plan
1.Please reference the detail and sheet for SDCB-700 (control structure).
Sheet C-521–Utility Profiles
1.The SDMH 301–note refers to detail on page C-530; however it is on C-531. Please revise plans
accordingly.
2.Please revise notes to show that SDMH 2 is used instead of SDMH 1.
Sheet C-530–Utility Details
1.Type I Manhole Detail does not appear to be used in the plan set. Please revise plans accordingly.
2.Detail 1 is not referenced on sheet C-500 & 510. Please revise plans accordingly
Sheet C-531–Utility Details
1.Please add a note to the Flow Control Detail (Detail 1) that the shear gate handle will be secured to the
ladder when in the closed position.
2.The view point of the media filter drain detail is not as shown on C-310. Please also include the
distance to parking/bumper blocks.
Sheet L-101–Landscape Plan
1.It appears as though there may be a conflict with the fire vault and water service lines located within
the same area as proposed tree plantings.
Sheet L-103–Plant Legend & Details
1.Add note to plans that all newly landscaped areas must have compost-amended soils to City standards.
Sheet L-201–Irrigation Plan
1.Plans indicate on the east side of building that there will be a new irrigation line connected to an
existing main line. Backflow assembly for this section main line to be shown on plans.
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Sheet A-1.0–Site Plan
1.Please show all private and public easements.
2.Please add a general note to this plan sheet that references the civil construction drawings for
engineering requirements.
Traffic Control / Truck Route –Plan submitted by Dan Beason w/Skanska
1.Please provide a site specific Traffic Control Planshowing the following items.
a.All southbound lanes of highway 99.
b.Bus stops
c.Neighboring driveways
d.Dimensions (for signs, driveway and bus stop locations, etc.)
e.Appropriate signage and lane closure for the removal and replacement of the curb/gutter
Review comments by Jerry Shuster, Stormwater Engineering Program Manager:Please contact
Jerry directly with any questions you may have related to the storm drainage report. Jerry can be
reached by email at shuster@ci.edmonds.wa.usor by phone at 425.771.0220.
For this permit I reviewed the following:
Swedish/Edmonds Hospital, Puget Sound Cancer Center, DrainageReport, dated August 2011,
KPFFConsulting Engineers.
Civil Plan sheets C-410, C-500, C-510, and sheets with referenced details.
Drainage Report
1.Section 2, page 2.This section should include a description the current drainage system served by all
parts of the site that are going to be redeveloped by the proposed project.A drawing should show
whatareas are tributary to the existing vault.A second figure (under Section 3) should show all areas
of the proposed projects that are tributary to the various stormwater features (rain garden, media filter,
sand filter, and detention pond) and the bypass area.This information should feed into the table on
Sheet C-500 that has a tally of the various types of impervious surface areas.
2.Section 3, page 3, Construction Stormwater Pollution Prevention Plan.
a)The site classifies as a Large Site Project.Large site projectsare required to have an
assessment of the erosion potential of the site.Please fill out the enclosed form and include
it the report as anappendix.
b)On page 3 of the report, discuss the results of the erosion potential scoring.
c)The Construction Stormwater Pollution Prevention Plan for the project that willbe submitted
totheDept. of Ecology should be included in the submittals to the City of Edmonds.Be sure
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to sendthe Notice of Intent and write the plan to the most recent Ecology Construction
General Stormwater Permit (CSWGP), effective 1/1/2011. More information can be found at
http://www.ecy.wa.gov/programs/wq/stormwater/construction/permit.html.
3.Section 3, page 3, On-Site Stormwater Management. Section 4.5 of the Edmonds Stormwater Code
Supplement (ESCS) states that all Large Site Projects are required to consider the use of Low Impact
Development (LID) practices and document the decision-making process used to select or screen out
their application.While the site does use a rain garden, a brief explanation why more of the site’s
drainage was not handled using LID techniques should be included.The fact that the soil infiltration
rate is so low would be the primary reason.
4.Section 3, page 4, Runoff Treatment.
a)The text presents a native soil design infiltration rate of 0.125 inches/hour.The geotechnical
report that presents this data should be referenced and included as an appendix to the
drainage report.Also, the text states that 91% of the runoff volume will be sent to an offline
sandfilter.Volume V, Section 8.6 of the 2005 Ecology Stormwater Manual states that a
sand filter used for phosphorus treatment need to be designed to capture 95% of the runoff
volume (“Large Sand Filter”).Ensure that the sand filter conforms to alldesign
requirements in Section 8.6 of the Manual.
b)Describe the design criteria used for sizing the rain garden.If it is pretreatment for the sand
filter, it must meet the design criteria for pre-setting basins described in Section 6.3 of the
Manual (The treatment volume shall be at least 30 percent of the total volume of runoff from
the 6-month, 24-hour storm event).
5.Section 3, page 5, Flow Control. Section4.7 of the ESCS discussesthat Large Site Projects with
more than 10,000 sf ofeffective impervious surface must design flow control to the 2005 Ecology
Manual standard.This design uses the Edmonds-specific flow control standard.The Edmonds-
specific flow control standard is applicable only to Small Site Projects or Large Site Projects with less
than 10,000 sf of effective impervious surface area. Resize the flow control system using the 2005
Ecology Manual flow control standard.
6.Appendix G.These standards appear to be from the 2009 King County Surface Water Management
Manual.Please include all the appropriate standards from the 2005 Ecology Stormwater Manual and
the Washington DOT manual for the media filter.
7.All disturbed pervious and new perviousareas (lawn, landscape, etc.) shall have amended soils per
BMP T5.13 per the 2005 Ecology Stormwater manual.Please specify on appropriate plan sheets.
Note: additional comments may be generated by the reviewer based on the changes to the design
necessitated by these comments.
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