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Other/Miscellaneous

General Comments -Per previous comments, provide AutoTurn analysis assuming the largest anticipated design vehicle. Likely Thomas HDX w/277" wheelbase. -Remove all trees/shrubs located at the SE corner of parcel to improve sight distance for Costco drive isle. -Access easement may be necessary in the SE corner of parcel. This easement would allow for possible future re-alignment of the Costco Drive isle (substandard geometry). Access easement would not allow proposed parking lot to access 14th St SW (or Costco property). -Southern internal parking lot connection (with parcel #0419043117) is not aligned properly with existing parking infrastructure & proposed internal parking channelization. This alignment will likely cause lane encroachment issues for ingress/egress vehicles. -The existing internal access (along the east side of existing building) needs to connect with the proposed northern parking lot connection with a perpendicular approach. The proposed skewed/acute approach geometry will cause sight distance & operational issues (especially for large vehicles). As proposed, drivers will have difficulty turning their heads to scan for adequate gaps in traffic. -Civil submittal shall include detailed striping/signage plan. Traffic Scoping Comments: -Per previous comments, vehicle trip credits cannot be moved between projects/parcels. Update traffic scoping document to reflect this. -Proposed 188 additional parking spots (60 parking spots for buses + 128 parking stalls for staff) not consistent with scoping narrative & trip generation assumptions. -Per the project narrative, 64 bus drivers will be relocated from the downtown bus barn to this to this facility. The assumed LUC 528 (School District Office) is meant to represent administrative office functions. Additional office space has not been proposed by this project. Bus storage/logistics are not represented by this ITE land use. -Inbound/outbound buses + inbound/outbound personal vehicles need to be accounted for in trip generation assumptions. -Please reference Traffic Impact Study from Milford, CT Bus Depot at 615 Plains Rd. - TIA completed by Benesch in May 2022. -Update traffic scoping worksheet & study intersections accordingly. -Provide more narrative on how trip distribution was determined. -More narrative needed for how ongoing fleet repairs, maintenance, and fueling activities impact vehicle trips to/from this site. -Scoping site plan does not match preliminary site plan. -Resubmit traffic scoping document for review prior to starting TIA. Traffic analysis -City can provide signal timing for signals within study area. -Need to measure existing queue lengths at study intersections -Delay analysis shall account for unserved demand where applicable. -use 3% annual growth rate (3 year horizon). -The operational analysis at 17th St SW & 39th Ave should evaluate existing NB/SB channelization. Analysis needs to evaluate SBL & NBL turn pockets. -report 95th percentile queuing & approach delay.

Add Submittal Item: Tree Risk Assessment for Significant Trees

Additional Submittal Item Required: Existing trees on the site which are larger than 15” in Diameter at Breast Height (DBH) are considered to be ‘significant trees’ and must be retained, where possible. If your site includes any significant trees, then you must include a tree risk assessment completed by a certified arborist and provided with your land use application and civil construction permit landscape plan.

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Bus parking lot to the north is missing required type IV landscaping for parking areas. [Site Plan, Sheet C3-302]

Other/Miscellaneous

Where electric vehicle charging stations are provided in parking lots or parking garages, excluding garages in single-family residences, accessible electric vehicle charging stations shall be provided according to the ratios shown in the table 20.56.030 (2). See this code section for specific design instructions for accessible EV stalls.

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Provide level of EV charging station anticipated. Review PMC 20.56 for regulations for EV charging stations. [site plan, sheet C3-302]

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Change bio-retention swale landscaping to type SLD-02 Landscaping in storm water control facilities. All bio-rention swales on site must follow SLD-02 landscape standards. SLD-02 standards can be found in City Vegetation Management Standards Manual (VMS) pg 44 [Landscape Plan, sheet L1.00]

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all new and replaced utility lines must be located outside of required landscape beds unless it can be demonstrated that no other feasible alternative exists. See VMS Pg 25

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Erosion control grass seed mix only permitted where necessary to stabilize steeply sloped areas. All other landscaping areas that are not covered by buildings or pavement shall be landscaped using appropriate shrubs, ground covers and trees. Landscaping shall be sufficient to achieve 75 percent coverage within a three-year period [Landscape Plan, sheet L1.00]

Other/Miscellaneous

As of 7/1/22, the city has adopted the 2019 Ecology Manual. Please update the references in the preliminary storm plan from 2014 to 2019. See page 10, 11, 12, etc, of the report.

Other/Miscellaneous

Provide the WHMM calculation printout to show that the infiltration trenches are feasible, infiltrate 100% and meet the flow control standard.

Other/Miscellaneous

The adjacent site to the west determined relatively infeasible soil rates for shallow infiltration. Moderate infiltration was present in the vashon advance outwash. The geotech report mentions "Locating and constructing infiltration trenches with a variable base depth can be challenging and additional subsurface exploration and infiltration testing will be required for facilities planned in Vashon advance outwash." Provide further justification regarding the feasibility of shallow infiltration feasibility with additional testing. Ensure the test pit is proposed at the proposed elevation of the infiltration trenches.

Other/Miscellaneous

Provide the WWHM modeling calculation for the sizing of the bioretention facilities.

Other/Miscellaneous

Provide the WWHM modeling calculations showing the project meeting the flow control requirements of the Ecology manual.

Other/Miscellaneous

What is the proposed phase 2 of the project proposal?

Other/Miscellaneous

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Coordinate with Costco regarding re-directing the stormwater flows from the cul-de-sac to the east to the catch basin to the east. This stormwater will be directed towards Costco's private pond rather than bypassing through the proposed parking lot. This coordination may require an agreement between the City of Puyallup and Costco. Provide a narrative regarding this cul-de-sac stormwater discharge during the next submission [Civils, pg 6]

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Provide an agreement from the owners of 1201 39th Ave SW, that the overflow of the infiltration trenches can be conveyed to the existing pond. [Civils, pg 6]

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Remove this sheet, it appears to be a duplicate of sheet 2 with less information. [Civils, pg 1]

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Provide a vicinity map for the project. [Civils, pg 2]

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provide the new square footage of the parcel. [civils, pg2]

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Show the existing underground Costco fuel storage tanks [civils plans, pg 2]

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Update the language for MR 9 as the city uses the 2019 Ecology manual, not the Pierce County Stormwater Manual. [Drainage report, pg 14]

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Provide the square footage of impervious surfaces proposed by this development. [civils, pg 6]

Other/Miscellaneous

Must show all additional accessible parking spots as defined in the IBC along with WA. ST. amendments. Also there is going to be a big change in the requirements for electrical charging stations effective July 1, 2023 per WAC 51-50-0429. So may want to do the design to reflect those new requirements if submitting for a permit after that date.

Other/Miscellaneous

1) Must comply with International Fire Code provisions adopted by the State and City of Puyallup.