HomeMy WebLinkAboutC_Civil Response Letter_161017_v1O
October 16, 2017
Development Engineering Division
City of Renton
1055 S. Grady Way
Renton Washington 98057
Taco Bell
4225 NE 4th Street
Renton, Washington 98059
Mr. Tunison
GPD Group, Professional Corporation is in receipt of the corrections dated 8/11/2017 for the above-
referenced project. We are addressing each comment as follows:
Sheet T-001
1. Cover page shall include: vertical datum, tied to a minimum of 2 COR benchmarks. Horizontal
Coordinates – Washington State Plane North, NAD 83 (91-HARN) on at least 2 exterior
lot/boundary corners must be shown. Contact information of the applicant, developer, engineer,
surveyor, landscape architect, and utility service providers. Site data consisting of tax parcel/plat
number, project address, site area (sf and acres), disturbed area (sf and acres), gross impervious
area (sf and acres), net new impervious area (sf and acres), impervious surface coverage based
on gross impervious area (%), building coverage, building sizes (sf), Parking count (vehicle and
bicycle), net density, zoning (include allowed impervious surface and max allowed building
coverage per zoning), and setbacks.
Response: All information has been added to T-001.
2. If any utility easements for the city are being created or released, please provide documentation
for review and/or start the release process.
Response: No utility easements are being created or released.
3. Note these numbers to be input on the COR title block (TED-40-3960, R-396001, 15-000014, 17-
000288, 17002911).
Response: Numbers have been added to the COR title block, typical of all
sheets.
4. Calculations: Drawings are not to scale. Please provide scaled drawings (typ. of all sheets).
Response: Scaled drawings are provided.
Sheet C-101
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5. This pipe is noted as being removed. Show removal/replacement of asphalt.
Response: Asphalt has been updated to reflect removal/replacement of pipe.
6. Protect existing blow-off assembly during construction (Southwest portion of lot).
Response: Existing blow-off assembly call out has been updated to be
removed and relocated in proposed planting strip.
7. Call-out existing water appurtenances. Identify any that are to remain and provide details for any
that need to be relocated based on the revised building location (typ.).
Response: Water appurtenance call-outs have been updated.
8. Protect existing water meter during construction. Meter to be removed and capped at main line if
it is not re-used for new building (by City forces).
Response: Existing water meter call out has been updated and is to be capped
at the main line by city forces during removal.
9. Protect existing blow-off during construction (Southeast portion of lot).
Response: Existing water blow-off assembly call-out has been updated to
protect existing blow-off assembly during construction.
10. Protect existing hydrant during construction.
Response: Existing hydrant call-out has been updated to protect existing
hydrant during construction.
11. The existing water meters for domestic and irrigation will need to be relocated. Relocation to be
completed by city forces under a separate water service permit. Show actual location of the
existing water meters and the proposed new location based on the revised building layout.
Response: Existing water meter call-outs have been updated to remove the
existing water meters. See utility plan for proposed meter locations.
Sheet C-111
12. The driveway, as shown here, does not match the standard detail provided on sheet C-503.
Update driveway to match detail. Remove ADA ramps shown. Utilize the City standard driveway
detail.
Response: The existing driveway is in good condition. In an effort to keep the
existing emergency access route open during construction, the proposed work
at the drive entrance has been removed.
13. Install right turn only sign.
Response: A right turn only sign has been added to the plans.
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14. Leader point to light pole.
Response: Light pole leader has been updated.
15. Water meters to be relocated outside of parking area. Preference is installation in landscaping
strip.
Response: Plans have been updated to proposed water meters in landscaping
strip.
Sheet C-121
16. Provide a swale with decorative rock and vegetation to prevent erosion for concentrated sheet
flow (typical of 2).
Response: Decorative rock and vegetation has been added to the plans. Please
see landscaping plans for additional information.
Sheet C-131
17. Use erosion control notes from the City of Renton Amendments to the 2009 KCSWDM Reference
Section 7-B. Add surface water standard plan notes from reference Section 7-B.
Response: Surface water notes and erosion control notes from Section 7-B
have been added to the plans.
18. Add water plan general notes – COR STD Plan 300.0.
Response: Water plan general notes have been added to the plans.
19. Add sanitary sewer notes and specifications from City of Renton Standard Details
Response: Sanitary sewer notes and specifications have been added to the
plans.
Sheet C-133
20. Use City of Renton STD Detail 215.10
Response: City of Renton STD Plan – 215.10 has been added to the plans.
Sheet C-134
21. Use COR STD Plan 216.20.
Response: City of Renton STD Plan – 216.20 has been added to the plans.
22. Use COR STD Plan 216.30.
Response: City of Renton STD Plan – 216.30 has been added to the plans.
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23. Use COR STD Plan 214.00.
Response: City of Renton STD Plan – 214.00 has been added to the plans.
24. Use COR STD Plan 216.40
Response: City of Renton STD Plan – 216.40 has been added to the plans.
Sheet C-135
25. Include these in the TIR rather than the civil plans.
Response: ESC Maintenance Report has been added to the TIR.
26. Use COR STD Plan 214.00
Response: COR standard plan 214.00 has been added to sheet C-134.
Sheet C-136
27. Include these in the TIR rather than the civil plans.
Response: SWPPS Maintenance Report sheets were from the 2016 KCSWDM.
With the project subject to the 2009 KCSWDS, the charts were removed from
the project.
Sheet C-141
28. Provide proposed invert and rim elevations for all sanitary sewer cleanouts.
Response: Rim and invert elevations for sanitary sewer cleanouts have been
updated on the plans.
29. Include existing invert and proposed rim elevations.
Response: Plans have been updated to include existing invert and proposed
rim elevations.
30. Show size of new water meter install RPBA backflow prevention assembly in “hot box” per City
standard details 350.2. Located meter and RPBA in planter strip.
Response: Plans have been updated to include size, backflow prevention
assembly and meter location.
31. Identify each existing water appurtenance and show the location of the relocated water meters,
or other appurtenances, for both irrigation and domestic water service. There is an existing 1”
domestic water meter and a 1” irrigation water meter currently located on the site. The existing
Taco Bell – 4225 NE 4th Street 16 October 2017
1” domestic service should be cut and capped at the main. Show the location of the new
proposed 1.5” domestic water service line and meter.
Response: Plans have been updated to show proposed meter location.
32. Show removal of the existing hydrant service line and fitting. Identify new fittings for relocated
service line.
Response: Plans have been updated to show removal of existing hydrant and
new hydrant location.
33. Relocate existing hydrant in planter strip-min. 24” from face of new curb (by city forces).
Response: Plans have been updated to show removal of existing hydrant and
new hydrant location.
34. 1.5” service connections must be downstream of the water meter and cannot be connected
directly to the 8” water main.
Response: Plans have been updated to show updated location of 1.5” service
connection.
35. Adjust existing blow-off assembly to finish grade (by city forces).
Response: Plans have been updated to show existing blow-off assembly to be
adjusted to grade by city forces.
36. Water meter should be located in a level unobstructed area as close to the city main as possible,
with the distance not to exceed 50-ft. Meters to commercial developments should be located near
driveway entrances within the right-of-way or within public utility easements in landscape areas,
and near access driveways.
Response: Plans have been updated to show new water meter location within
proposed planting strip.
37. Provide call out. Is this a catch basin or yard drain?
Response: See callout STM-102 on sheet C-141 for proposed yard inlet.
38. Min 7-ft between sanitary sewer and edge of rain garden.
Response: Plans have been updated to provide 11.85’ between edge of rain
garden and proposed sanitary sewer.
39. As proposed, the areas draining to the rain garden are required to be analyzed as bypass area
from the existing conveyance system in accordance with section 1.2.3E of the City of Renton
Amendments to the 2009 KCSWDM. The applicant will need to include a discussion in the TIR
showing compliance with all criteria outlined in the manual. Alternatively, the release from the
rain garden can be routed to the existing conveyance system.
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Response: The existing conveyance system on site is too shallow to be used to
convey water from the rain garden. A discussion has been added to the TIR.
40. Any trash enclosures which direct drainage to the sanitary sewer system shall be equipped with a
roof. A separate building permit is required for the trash enclosure.
Response: Plans have been updated to include a roof with the trash enclosure.
41. Adjust all water valves to finish grade per city standards.
Response: Plans have been updated to include call-outs to adjust all water
valves to finished grade per city standards.
42. Due to the high-use site, enhanced water quality is required prior to the downstream
connections.
Response: The existing site constraints do now allow for any of the options
listed on the “Enhanced Basic Water Quality Menu”. The site drains to the
existing offsite water quality facility.
43. Relocate existing blow-off assembly within new planter area (by city forces).
Response: Plans have been updated to show existing blow-off assembly to be
relocated in planter area.
Sheet C-502
44. Identify which size system is being used on the site.
Response: Plans have been updated to reflect which size grease interceptor is
to be used.
45. This detail is not referenced in the plan sheets. Show where this is being used (detail #3).
Response: Detail #3 has been updated.
Sheet C-504
46. Any trash enclosures which direct drainage to the sanitary sewer system shall be equipped with a
roof. A separate building permit is required.
Response: Plans have been updated to include a roof with the trash enclosure.
Sheet C-505
47. Remove ADA ramps at driveway. Use COR STD plan for driveway installation.
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Response: The existing driveway is in good condition. In an effort to keep the
existing emergency access route open during construction, the proposed work
at the drive entrance has been removed.
48. Use COR STD Plan 405.
Response: City of Renton STD Plan – 405 has been added to the plans.
Sheet C-506
49. Include City of Renton standard details 260.00 and 260.10.
Response: City of Renton STD Plan – 206.00 and 260.10 have been added to
the plans.
50. Show the inlet from the roof drains.
Response: There is no proposed inlet from the roof drains.
51. Show the general location of the fabric in the schematic profile.
Response: The filter fabric can be located between the soil media and
aggregate. Leader has been updated in the plans.
52. Adjust profile and section drawings to more accurately display the associated dimensions.
Response: The profile has been adjusted to more accurately display the
associated dimensions.
53. Coordinate with landscape architect to show these plants on the landscaping plans.
Response: Comments noted.
54. 8-13% - Reference Section C.2.5 of the 2009 KCSWDM.
Response: Organic matter of rain garden has been updated reflecting
requirements in Section C.2.5.
Please note that due to City of Renton comments, some page numbers have been updated.
Drainage Report
55. Include a complete analysis of all 8 core requirements and all 6 special requirements in Section 2
of the TIR. The analysis should include discussion regarding the previously approved and
installed conveyance system and stormwater facilities and show that the existing system is
adequately designed to handle the run-off created as a result of the proposed development.
Response: A complete analysis of the 8 core requirements and 6 special
requirements has been added to the drainage report.
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56. The proposed site is a high-use site and is therefore subject to enhanced water quality
treatment. The existing water quality facility was designed using the basic water quality menu.
Installation of additional water quality measures will be required. For example, a stormfilter with
CSF leaf compost media (see section 6.5.5 of the City of Renton Amendments to the 2009
KCSWDM).
Response: The existing site constraints do now allow for any of the options
listed on the “Enhanced Basic Water Quality Menu”. The site drains to the
existing offsite water quality facility.
57. Provide a map showing the tributary area that will drain to the rain garden with topography.
Response: A map has been provided to delineate the stormwater that will
reach the rain garden.
58. High use site & subject to enhanced WQ standards. The existing wetpool was designed using the
basic WQ manual.
Response: The existing site constraints do now allow for any of the options
listed on the “Enhanced Basic Water Quality Menu”. The site drains to the
existing offsite water quality facility.
59. The applicant must show that the existing stormwater flow control and water quality treatment
facility that was previously approved was sized for the same amount of impervious area (PGIS
and non-PGIS area) and pervious area as being proposed by this project. If there is an increase
in impervious area, then resizing calculations of existing flow control/water quality facility and
conveyance systems and to the facilities including off-site tributary areas will be required. Provide
a table showing the amount of PGIS impervious area, non PGIS and pervious area proposed on
the site and then the assumed amount of these areas that was used for the design of the flow
control and water quality treatment facility that this project will utilize to demonstrate the
proposed site development matches or is less than what was assumed for the stormwater facility
sizing. Provide a table comparing pervious and impervious area for the proposed development
and the previously assumed impervious and pervious areas for the site in this section of the TIR.
Response: Drainage report has been updated to show and discuss the current
site, previously proposed development and proposed development stormwater
runoffs, and has demonstrated that the proposed site has less runoff than
both the current site and the previously proposed site.
60. Originally approved as a bank. Change to a restaurant results in the site being high use and
requiring enhanced treatment.
Response: Drainage report has been updated to address water quality. The
existing site constraints do now allow for any of the options listed on the
Taco Bell – 4225 NE 4th Street 16 October 2017
“Enhanced Basic Water Quality Menu”. The site drains to the existing offsite
water quality facility.
If you require any additional information or have any questions, please contact me at 330-572-3532 or
email at rdarwish@gpdgroup.com.
Sincerely,
Rafia Darwish, EI, LEED AP BD+C
Project Coordinator
GPD Group