HomeMy WebLinkAboutEx_09_Drainage_Plan.
Solera Phase 2:
Block C & D
Site Plan Review
Preliminary Technical Information Report
September 2024
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
i
Drainage Report
September 2024
Prepared for:
New Home Co.
1700 NW Gilman Blvd, Suite 220
Issaquah, WA 98027
Prepared by:
PIC: Jeremy Febus, PE, LEED AP
PM: Michelle Freeman, PE
Project Engineer: Monica Regan, PE
Design Engineer: Danial Khan, EIT
KPFF Consulting Engineers
1601 Fifth Avenue, Suite 1600
Seattle, WA 98101
(206) 622-5822
KPFF Project No. 2400283
09/24/2024
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
KPFF Consulting Engineers
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Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
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Table of Contents
1. Project Overview ........................................................................................................................................... 1
2. Existing Conditions and Drainage .............................................................................................................. 1
3. Proposed Conditions and Requirements Summary ................................................................................. 2
Core Requirement No. 1: Discharge at the Natural Location ........................................................................ 3
Core Requirement No. 2: Offsite Analysis ..................................................................................................... 3
Core Requirement No. 3: Flow Control .......................................................................................................... 3
Core Requirement No. 4: Conveyance System ............................................................................................. 3
Core Requirement No. 5: Construction Stormwater Pollution prevention ..................................................... 3
Core Requirement No. 6: Maintenance and Operations ............................................................................... 3
Core Requirement No. 7: Financial Guarantees and Liability ....................................................................... 3
Core Requirement No. 8: Water Quality ........................................................................................................ 4
Core Requirement No. 9: On-Site BMPs ....................................................................................................... 4
Special Requirement No. 1: Other Adopted Area-Specific Requirements .................................................... 4
Special Requirement No. 2: Flood Hazard Area Delineation ........................................................................ 4
Special Requirement No. 3: Flood Protection Facilities ................................................................................ 4
Special Requirement No. 4: Source Control .................................................................................................. 4
Special Requirement No. 5: Oil Control ......................................................................................................... 4
Special Requirement No. 6: Aquifer Protection Areas ................................................................................... 4
4. Off-Site Analysis ........................................................................................................................................... 4
Upstream Analysis .......................................................................................................................................... 4
Downstream Analysis ..................................................................................................................................... 5
5. Flow Control Analysis and Design .............................................................................................................. 5
6. Water Quality Analysis ................................................................................................................................. 6
Water Quality Requirement............................................................................ Error! Bookmark not defined.
BMP Requirement ........................................................................................................................................... 7
7. Conveyance System Analysis and Design................................................................................................. 7
8. ESC Analysis and Design ............................................................................................................................ 7
9. Special Reports and Studies ....................................................................................................................... 7
10. Bond Quantities and Declaration of Covenant .......................................................................................... 7
List of Figures
Figure 1-1: Vicinity Map, Courtesy of King County iMap...................................................................................... 1
Figure 2-1: Existing Drainage Basins, Subbasins, and Site Characteristics ....... Error! Bookmark not defined.
Figure 2-2: Enlargement of Figure 2-1 (Existing Drainage Basins, Subbasins, and Site Characteristics) .. Error!
Bookmark not defined.
Figure 2-3: Soils, Soil Map courtesy of USDA Web Soil Survey ......................... Error! Bookmark not defined.
Figure 4-1: One Mile Downstream Flow Path ..................................................... Error! Bookmark not defined.
Figure 5-1: Predeveloped Areas ......................................................................... Error! Bookmark not defined.
Figure 5-2: Developed Areas .............................................................................. Error! Bookmark not defined.
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
KPFF Consulting Engineers
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Figure 6-1: Water Quality Basins ......................................................................................................................... 6
List of Tables
Table 5-1: On-Site Area Summary ...................................................................................................................... 5
Table 5-2: MGSFlood Peak Flow Rate with 15-Minute Time Step ...................................................................... 5
Table 6-1: MGSFlood Sub-Basin Water Quality Sizing ....................................... Error! Bookmark not defined.
Appendices
Appendix A – TIR Worksheet
Appendix B – Existing Conditions Map
Appendix C – Proposed Conditions Map
Appendix D – Peak Flow Control Application Map and MGS Flood Calculations
Appendix E – On-Site BMPs: LID Performance Standard and Bioretention Calculations
Appendix F – Pipe Conveyance
Appendix G – Erosion Control Plan and Details
Appendix H – SWPPP
Appendix I – Bond Quantity Worksheet
Appendix J – Operation and Maintenance Manual
Appendix K – Geotechnical Report
Appendix L – Infiltration Test Report
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
1
1. Project Overview
This report has been prepared in support of the Site Plan Entitlement for Blocks C and D of the Solera Short
Plat (see Figure 1-1). At the time of this report writing, the City is reviewing the final plat map for the Solera
Short Plat. On the final plat, these blocks are referred to as “Parcel 3” and “4”. This scope of work includes
construction of townhomes on Block C and Block D, driveway access, grading, utilities, and stormwater
mitigation facilities. All off-site work was completed under separate permit, and this proposal is limited to work
entirely within the subject parcels. The project is subject to full drainage review according to the requirements
of the 2017 Renton Surface Water Design Manual (RSWDM) to which this project is vested by the approved
preliminary plat.
Figure 1-1: Site Map
2. Existing Conditions and Drainage
Block C and Block D have been rough graded under separate permit. Block C is approximately 2.58-acres
and is currently a grass field. Parcel D is approximately 1.28-acres and is currently in use as a temporary
parking lot for construction of the adjacent Block A and B apartment buildings. Plans call for Block D to also be
planted with grass once apartment construction is complete.
Both Block C and D generally slope from northeast to southwest at slopes of 2 to 5%. Surface water runoff
from Block C leaves the site as sheet flow and is collected by a series of municipal pipes and catch basins in
Jefferson Ave NE and NE 10th Street. Surface water runoff from Block D similarly exits the site as sheet flow,
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
KPFF Consulting Engineers
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but is collected by a series of municipal pipes and catch basins in Harrington Ave NE and NE 11th Street. The
two flow paths do not combine until approximately ½-mile downstream. Therefore Blocks C and D are two
separate threshold discharge areas (TDAs). The flow paths converge in NE Sunset Blvd and ultimately outfall
to Lake Washington approximately 1.3 miles downstream from the site.
Figure 2-1: TDA Map
According to Geotechnical Engineering Study prepared by Earth Solutions NW, LCC (ESNW), dated
September 28, 2020, soil largely consisting of fill deposits underlain by medium dense to dense sand and silty
sand native soils (Appendix K). Therefore, we model pervious surfaces on the site as Type C soils in the
predeveloped and developed conditions.
3. Proposed Conditions and Requirements Summary
The project proposes 61 townhome units on Block C and 29 on Block D along with associated alleys,
landscape areas, open space, and requisite utilities. The development must comply with all nine core
requirements and six special requirements of the RSWDM.
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
3
CORE REQUIREMENT NO. 1: DISCHARGE AT THE NATURAL LOCATION
The development will utilize the pre-existing topography and drainage patterns of the site as described above
in Section 2 of this report. The proposed development will utilize the storm drainage stubs approved for this
purpose by the Solera Preliminary Plat and Civil Construction Permit.
CORE REQUIREMENT NO. 2: OFFSITE ANALYSIS
An off-site analysis was completed as part of the approved Solera Preliminary Plat.
CORE REQUIREMENT NO. 3: FLOW CONTROL
According to the Flow Control Application Map from the RSWM, the project is required to meet the Peak Rate
Flow Control Standard. Flows from the redevelopment must match the 2-year, 10-year and 100-year peak
flows from the pre-developed condition. Pre-developed conditions must be modeled as existing conditions.
Existing site conditions are defined as conditions that existed prior to May 1979 as determined from aerial
photographs, unless land cover changes have been approved by the county since May 1979 as part of a
development permit or approval. Existing improvements on the site were built in phases over a range of years
from 1958 to 1977, and so for the purposes of this analysis, “existing conditions” are defined as the current
land use. The project is exempt from the flow control requirement because it proposes less impervious surface
than the existing site conditions. See section 5 of this report for more information on how the project meets
flow control requirements.
CORE REQUIREMENT NO. 4: CONVEYANCE S YSTEM
The development is required to convey the 25-year, 24-hour peak flow without overtopping. Pipe system
structures may overtop for runoff events exceeding the 25-year design capacity, provided overflow runoff from
a 100-year event does not create or aggravate a severe erosion or flooding problem downstream.
The proposed conveyance system has been designed to convey the 25-year peak flow without overtopping.
Refer to Section 7 for additional information.
CORE REQUIREMENT NO. 5: CONSTRUCTION STORMWATER POLLUTION
PREVENTION
Sediment-laden runoff is prohibited from entering adjacent right-of-way and downstream conveyance systems.
Temporary Erosion and Sediment Control (TESC) best management practices (BMPs) will be implemented
during construction. TESC BMPs are anticipated to include silt fences, conveyance channels, check dams,
sediment ponds, and catch basin inserts. Refer to Section 8 for additional information.
CORE REQUIREMENT NO. 6: MAINTENANCE AND OPERATIONS
The owner has maintenance responsibilities for on-site facilities. Refer to Section 10 for additional information.
CORE REQUIREMENT NO. 7: FINANCIAL GUARANTEES AND LIABILITY
Bond quantities for site improvements are provided in Section 10.
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
KPFF Consulting Engineers
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CORE REQUIREMENT NO. 8: WATER QUALITY
Runoff from all pollution-generating surfaces within the development area must be treated for water quality
prior to discharge from the site. More than 50% of runoff draining to proposed water quality facilities is from
multifamily land uses, so this development is subject to Enhanced Basic Water Quality treatment, per the
RSWDM. Enhanced Basic Water Quality treatment requires 80 percent total suspended solids (TSS), more
than 30 percent dissolved copper removal, and more than 60 percent dissolved zinc removal. The project
proposes bioretention facilities to satisfy the requirement. Water quality measures are further described in
Section 6 of this report.
CORE REQUIREMENT NO. 9: ON-SITE BMPS
The project is required to meet the On-Site BMP requirements by targeting new impervious surfaces, new
pervious surfaces, and any replaced impervious surfaces. The City of Renton does not require including
existing impervious surfaces added on or after January 8, 2001 as target impervious surfaces.
The project will implement the use of bioretention planters to the maximum extent feasible to meet the On-Site
BMP requirements. BMP measures are further detailed in Section 6 of this report.
SPECIAL REQUIREMENT NO. 1: OTHER ADOPTED AREA -SPECIFIC
REQUIREMENTS
There are no adopted area-specific requirements.
SPECIAL REQUIREMENT NO. 2: FLOOD HAZARD AREA DELINEATION
This project is not located in a flood hazard area.
SPECIAL REQUIREMENT NO. 3: FLOOD PROTECTION FACILITIES
This project does not modify or use a flood protection facility.
SPECIAL REQUIREMENT NO. 4: SOURCE CONTROL
There are no proposed commercial uses for Block C and Block D.
SPECIAL REQUIREMENT NO. 5: O IL CONTROL
The project does not classify as a high use site and is thus exempt from the Special Requirement #5.
SPECIAL REQUIREMENT NO. 6: AQUIFER PROTECTION AREAS
Under current revised delineations of aquifer protection areas within the city, the project site is not located
within any aquifer protection area or wellhead protection zone.
4. Off-Site Analysis
UPSTREAM ANALYSIS
The site is located on a ridgeline; therefore, no upstream basins drain onto the project site.
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
5
DOWNSTREAM ANALYSIS
A downstream analysis was completed for the approved preliminary plat, and is not duplicated here.
5. Flow Control Analysis and Design
The project proposes less than a 0.15-cfs increase in the 100-year peak flow when compared to existing
conditions and is therefore exempt from the Peak Rate Flow Control Standard per RSWDM Section 1.2.3.1.A -
Exemptions. Refer to Table 5-1 and Table 5-2 for on-site area and peak flow information.
Pre-developed conditions must be modeled as existing conditions. The King County Assessor’s Reports
indicate that the latest improvements to the developed parcels were made prior to 1977. All rooftops, paving,
and gravel areas were considered 100 percent impervious, and all pervious areas were considered till grass.
An Existing Conditions Map can be found in Appendix B. MGSFlood output data for flow control exception is
included in Appendix D.
Table 5-1: On-Site Area Summary
Impervious (Acres) Pervious (Acres) Total (Acres)
Block C
Existing Conditions 1.31 1.27 2.58
Proposed Conditions 2.01 0.57 2.58
Block D
Existing Conditions 1.28 0 1.28
Proposed Conditions 0.78 0.5 1.28
Total
Existing Conditions 2.59 1.27 3.86
Proposed Conditions 2.70 1.16 3.86
Table 5-2: MGSFlood Peak Flow Rate with 15-Minute Time Step
Predeveloped Peak
Flows (cfs)
Unmitigated
Developed Peak Flows
(cfs)
2-Year Peak Flow 1.063 1.102
10-Year Peak Flow 1.559 1.625
100-Year Peak Flow 2.796 2.915
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
KPFF Consulting Engineers
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6. Water Quality Analysis and Design
Stormwater runoff is treated through bioretention facilities to meet Basic Enhanced Water Quality treatment
requirements. A preliminary Surface Runoff Basin Map can be found in Appendix M.
Stormwater runoff from all pervious and impervious surfaces are conveyed to bioretention facilities.
Construction of Block C and Block D have been subdivided into 15 basins from the original master plan. Refer
to Figure 6-1: Water Quality Basins.
The water quality design flow, when detention facilities are not required, must meet 91 percent of the total
runoff volume using a 15-minute time step per Section 6.2.1 of the RSWM. The geotechnical report by Earth
Solutions Northwest LLC provides tested on-site infiltration rates ranging from 2-20 inches per hour, refer to
Appendix L. Runoff treated in bioretention planters will infiltrate into native soils or overflow to the previously
described downstream flow path.
Design infiltration rates were determined per Section 5.2.1 of the RSWM. An infiltration rate of 6 inches per
hour was used for the amended soil and an infiltration rate of 0.7 inches per hour was used for the underlying
native soils. The rate of 0.7 inches per hour is a conservative infiltration design rate, taking the lowest tested
rate (2 inches per hour) and applying a safety factor of 3. A design spreadsheet summarizing contributing area,
bioretention design, and all MGSFlood modeling output data will be provided in Appendix D with construction
documents.
Figure 6-1: Water Quality Basins
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
7
7. On-site BMPs
According to section 1.2.9 of the RWSM, Core Requirement #9 can be satisfied by,
1) Application of BMPs to the maximum extent feasible; or,
2) Using a continuous runoff model to demonstrate compliance with the Low Impact Development (LID)
Performance Standard.
This development has opted to apply BMPs to the maximum extent feasible across the site. The development
has proposed to meet this requirement primarily through bioretention cells distributed throughout the site.
Presettling is provided in basins with bioretention facilities taking greater than 5,000 sf of impervious area.
For Block C, the site provides at-grade bioretention planters for road runoff and roof areas. The maximum
bioretention area site constraints allow is provided. Soil Amendment is proposed to meet BMP requirements
for new pervious surfaces on Block C in accordance with The City of Renton Surface Water Design Manual
Appendix C.2.13.
For Block D, the site provides at-grade bioretention planters for road runoff and roof areas. The maximum
bioretention area site constraints allow is provided. For new pervious surface on Block D, Soil Amendment is
proposed to meet BMP requirements in accordance with The City of Renton Surface Water Design Manual
Appendix C.2.13.
Overflow from bioretention areas will be routed via on-site conveyance structures and drain lines to the
existing public conveyance system. Basin delineation matches the water quality mapping shown in figure 6-1.
and individual basin’s MGSFlood Reports will be provided in the engineering permit submittal.
8. Conveyance System Analysis and Design
Storm pipe conveyance and analysis will be provided with construction documents.
9. ESC Analysis and Design
A construction stormwater pollution prevention plan will be provided with construction documents.
10. Special Reports and Studies
A geotechnical engineering report was prepared by Earth Solutions NW, LLC, dated September 2020. This is
included in Appendix K of this report.
11. Bond Quantities and Declaration of Covenant
Bond quantity worksheets and a Declaration of Covenant for Operation and Maintenance will be provided with
construction documents.
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
KPFF Consulting Engineers
8
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Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix A
Appendix A
TIR Worksheet
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
CITY OF RENTON SURFACE WATER DESIGN MANUAL
2017 City of Renton Surface Water Design Manual 12/12/2016 8-A-1
REFERENCE 8-A
TECHNICAL INFORMATION REPORT (TIR)
WORKSHEET
Part 1 PROJECT OWNER AND
PROJECT ENGINEER Part 2 PROJECT LOCATION AND
DESCRIPTION
Project Owner _____________________________
Phone ___________________________________
Address __________________________________
_________________________________________
Project Engineer ___________________________
Company _________________________________
Phone ___________________________________
Project Name __________________________
CED Permit # ________________________
Location Township ________________
Range __________________
Section _________________
Site Address __________________________
_____________________________________
Part 3 TYPE OF PERMIT APPLICATION Part 4 OTHER REVIEWS AND PERMITS
Land Use (e.g., Subdivision / Short Subd.)
Building (e.g., M/F / Commercial / SFR)
Grading
Right-of-Way Use
Other _______________________
DFW HPA
COE 404
DOE Dam Safety
FEMA Floodplain
COE Wetlands
Other ________
Shoreline Management
Structural Rockery/Vault/_____
ESA Section 7
Part 5 PLAN AND REPORT INFORMATION
Technical Information Report Site Improvement Plan (Engr. Plans)
Type of Drainage Review
(check one):
Date (include revision
dates):
Date of Final:
Full
Targeted
Simplified
Large Project
Directed
____________________________________
__________________
Plan Type (check
one):
Date (include revision
dates):
Date of Final:
Full
Modified
Simplified
____________________________________
__________________
Jaden Storedahl
(503) 899-8170
1700 NW Gilman Blvd, Suite 220
Issaquah, WA 98027
Michelle Freeman
KPFF
(206) 622-5822
Solera Blocks C & D
23 North
05 East
9
2842 NE Sunset Boulevard,
Renton, WA 98056
X
X
X
X
X
X
09/24/2024
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
REFERENCE 8: PLAN REVIEW FORMS AND WORKSHEET
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
12/12/2016 2017 City of Renton Surface Water Design Manual 8-A-2
Part 6 SWDM ADJUSTMENT APPROVALS
Type (circle one): Standard / Blanket
Description: (include conditions in TIR Section 2)
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
Approved Adjustment No. ______________________ Date of Approval: _______________________
Part 7 MONITORING REQUIREMENTS
Monitoring Required: Yes / No
Start Date: _______________________
Completion Date: _______________________
Describe: _________________________________
_________________________________________
_________________________________________
Re: SWDM Adjustment No. ________________
Part 8 SITE COMMUNITY AND DRAINAGE BASIN
Community Plan: ____________________________________________________________________
Special District Overlays: ______________________________________________________________
Drainage Basin: _____________________________________________________________________
Stormwater Requirements: _____________________________________________________________
Part 9 ONSITE AND ADJACENT SENSITIVE AREAS
River/Stream ________________________
Lake ______________________________
Wetlands ____________________________
Closed Depression ____________________
Floodplain ___________________________
Other _______________________________
_______________________________
Steep Slope __________________________
Erosion Hazard _______________________
Landslide Hazard ______________________
Coal Mine Hazard ______________________
Seismic Hazard _______________________
Habitat Protection ______________________
_____________________________________
Core Requirements 1-9 and Special Requirements 1-6
Sunset Area Surface Water Master Plan (CH2M HILL, 2011)
none proposed
East Lake Washington
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
REFERENCE 8-A: TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
2017 City of Renton Surface Water Design Manual 12/12/2016 Ref 8-A-3
Part 10 SOILS
Soil Type
______________________
______________________
______________________
______________________
Slopes
________________________
________________________
________________________
________________________
Erosion Potential
_________________________
_________________________
_________________________
_________________________
High Groundwater Table (within 5 feet)
Other ________________________________
Sole Source Aquifer
Seeps/Springs
Additional Sheets Attached
Part 11 DRAINAGE DESIGN LIMITATIONS
REFERENCE
Core 2 – Offsite Analysis_________________
Sensitive/Critical Areas__________________
SEPA________________________________
LID Infeasibility________________________
Other________________________________
_____________________________________
LIMITATION / SITE CONSTRAINT
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
Additional Sheets Attached
Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet
per Threshold Discharge Area)
Threshold Discharge Area:
(name or description)
Core Requirements (all 8 apply):
Discharge at Natural Location Number of Natural Discharge Locations:
Offsite Analysis Level: 1 / 2 / 3 dated:__________________
Flow Control (include facility
summary sheet)
Standard: _______________________________
or Exemption Number: ____________
On-site BMPs: _______________________________
Conveyance System Spill containment located at: _____________________________
Erosion and Sediment Control /
Construction Stormwater Pollution
Prevention
CSWPP/CESCL/ESC Site Supervisor: _____________________
Contact Phone: _________________________
After Hours Phone: _________________________
Type C Till 2-5%Low
Block C and Block D
2
03/12/2021
TBD
Bioretention
TBD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
REFERENCE 8: PLAN REVIEW FORMS AND WORKSHEET
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
12/12/2016 2017 City of Renton Surface Water Design Manual 8-A-4
Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet
per Threshold Discharge Area)
Maintenance and Operation Responsibility (circle one): Private / Public
If Private, Maintenance Log Required: Yes / No
Financial Guarantees and Liability Provided: Yes / No
Water Quality (include facility
summary sheet)
Type (circle one): Basic / Sens. Lake / Enhanced Basic / Bog
or Exemption No. _______________________
Special Requirements (as applicable):
Area Specific Drainage
Requirements
Type: SDO / MDP / BP / Shared Fac. / None
Name: ________________________
Floodplain/Floodway Delineation Type (circle one): Major / Minor / Exemption / None
100-year Base Flood Elevation (or range): _______________
Datum:
Flood Protection Facilities Describe:
Source Control
(commercial / industrial land use)
Describe land use:
Describe any structural controls:
Oil Control High-Use Site: Yes / No
Treatment BMP: _________________________________
Maintenance Agreement: Yes / No
with whom? _____________________________________
Other Drainage Structures
Describe:
Mixed
none
None
Residential
TBD During Building Permit Application
None
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
REFERENCE 8-A: TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
2017 City of Renton Surface Water Design Manual 12/12/2016 Ref 8-A-5
Part 13 EROSION AND SEDIMENT CONTROL REQUIREMENTS
MINIMUM ESC REQUIREMENTS
DURING CONSTRUCTION
Clearing Limits
Cover Measures
Perimeter Protection
Traffic Area Stabilization
Sediment Retention
Surface Water Collection
Dewatering Control
Dust Control
Flow Control
Control Pollutants
Protect Existing and Proposed BMPs/Facilities
Maintain Protective BMPs / Manage Project
MINIMUM ESC REQUIREMENTS
AFTER CONSTRUCTION
Stabilize exposed surfaces
Remove and restore Temporary ESC Facilities
Clean and remove all silt and debris, ensure operation of Permanent BMPs/Facilities, restore
operation of BMPs/Facilities as necessary
Flag limits of sensitive areas and open space
preservation areas
Other _______________________
Part 14 STORMWATER FACILITY DESCRIPTIONS (Note: Include Facility Summary and Sketch)
Flow Control Type/Description Water Quality Type/Description
Detention
Infiltration
Regional Facility
Shared Facility
On-site BMPs
Other
________________
________________
________________
________________
________________
________________
Vegetated Flowpath
Wetpool
Filtration
Oil Control
Spill Control
On-site BMPs
Other
________________
________________
________________
________________
________________
________________
________________
Part 15 EASEMENTS/TRACTS Part 16 STRUCTURAL ANALYSIS
Drainage Easement
Covenant
Native Growth Protection Covenant
Tract
Other ____________________________
Cast in Place Vault
Retaining Wall
Rockery > 4′ High
Structural on Steep Slope
Other _______________________________
X
X
X
X
X X
X
X
X
X
X
X
Infiltration Chambers
Bioretention Swales
Bioretention
X Infiltration Chambers
X
X
X
X
X
X
X
X
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
REFERENCE 8: PLAN REVIEW FORMS AND WORKSHEET
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
12/12/2016 2017 City of Renton Surface Water Design Manual 8-A-6
Part 17 SIGNATURE OF PROFESSIONAL ENGINEER
I, or a civil engineer under my supervision, have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attached Technical Information Report. To the best of my
knowledge the information provided here is accurate.
____________________________________________________________________________________ Signed/Date
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix B
Appendix B
Existing Conditions Map
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
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(A DEDICATED PUBLIC RIGHT OF WAY)
SUNSET LANE NE
(A DEDICATED PUBLIC RIGHT OF WAY)
NE
1
0
T
H
S
T
R
E
E
T
(A
D
E
D
I
C
A
T
E
D
P
U
B
L
I
C
R
I
G
H
T
O
F
W
A
Y
)
SUNSET LANE NE
(A DEDICATED PUBLIC RIGHT OF WAY)
NE SUNSET BOULEVARD
(A DEDICATED PUBLIC RIGHT OF WAY)
PERVIOUS: 1.78 ACRES
IMPERVIOUS = 11.04 ACRES
B A
DC
SOLERA
EXISTING CONDITIONS
JEFFERSON AVENUE NE
NE SUNSET BOULEVARD (SR 900)
NE
1
0
T
H
S
T
R
E
E
T
NE
1
1
T
H
S
T
R
E
E
T
N
E
1
2
T
H
S
T
R
E
E
T
HARRINGTON PLACE NE
KIR
K
L
A
N
D
AV
E
N
U
E
N
E
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix C
Appendix C
Proposed Conditions Map
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
HARRINGTON PL NE
HAR
R
I
N
G
T
O
N
A
V
E
N
E
NE
1
0
T
H
S
T
N
E
1
2
T
H
S
T
KIR
K
L
A
N
D
A
V
E
N
E
NE
1
1
T
H
S
T
JEFFERSON AVE NE JEFFERSON AVE NE
343
344
345 350
344 346 347 348 34
9 351 352
3
5
2
353
3
4
9
346
347
355
353
354 356
35
7
357
357
3
5
1
3
5
2
353
345 350 355341342343
3
4
4
346 347 348 349 351 352
35
3
3
5
4 35435
4
356
3
5
4
AL
L
E
Y
A
ALLEY B
AL
L
E
Y
D
AL
L
E
Y
E
AL
L
E
Y
F
AL
L
E
Y
G
ALLEY C
BLOCK B BLOCK A
BLOCK C
BLOCK D
LEGEND:
PROPERTY LINE
ROW LINE
ROW CENTERLINE
PROPOSED MAJOR CONTOUR
PROPOSED MINOR CONTOUR
STORM MAIN
CATCH BASIN
360
362
20,570.32 sf 10,775.8 sf
3,027.62 sf
2,304.16 sf
3,661.44 sf 4,306.25 sf 4,307.06 sf 4,307.53 sf
3,026.82 sf 3,025.9 sf 3,022.25 sf 3,025.89 sf 3,663.64 sf 3,670.53 sf 3,661.15 sf
3,025.15 sf 3,665.21 sf
3,663.75 sf
2,306.08 sf
3,023.06 sf
3,020.17 sf3,022.01 sf
JEFFERSON AVENUE NE
NE
1
0
T
H
S
T
R
E
E
T
NE
1
1
T
H
S
T
R
E
E
T
N
E
1
2
T
H
S
T
R
E
E
T
HARRINGTON PLACE NE
KIR
K
L
A
N
D
AV
E
N
U
E
N
E
SURFACE
ROOF TOP
SIDEWALK
ROAD/DRIVEWAY
BIORETENTION PLANTER
LANDSCAPE/GRAVEL
TOTAL
SOLERA
PROPOSED CONDITIONS
BLOCK A
1.94 AC
0.27 AC
0.03 AC
0.03 AC
0.33 AC
2.60 AC
BLOCK ABLOCK B
BLOCK C
BLOCK B
2.04 AC
0.22 AC
0.19 AC
0
0.31 AC
2.76 AC
TOTAL
5.51 AC
1.89 AC
2.91 AC
0.25 AC
2.26 AC
12.82 AC
NE SUNSET BOULEVARD (SR 900)
BLOCK D
0
1 inch = 40 feet
20'40'80'
BLOCK C
1.10 AC
0.37 AC
0.47 AC
0.06 AC
0.57 AC
2.57 AC
BLOCK D
0.43 AC
0.07 AC
0.25 AC
0.03 AC
0.50 AC
1.28 AC
OFF-SITE
0
0.96 AC
1.97 AC
0.13 AC
0.55 AC
3.61 AC
PHASE 1 (CONSTRUCTED)PHASE 2 (PROPOSED)
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix D
Appendix D
Peak Flow Control Application Map and MGSFlood Calculations
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
LakeDesire
ShadyLake (MudLake)
PantherLake LakeYoungs
LakeWashington
B l a ck Riv e r
Gree n Riv
e
r
C
edarRiver
UV900
UV167
UV515
UV169
UV900
UV169
UV167
BN
I
n
c
BN
I
n
c
BBNNIInncc
SSEERReennttoonnIIssssaaqquuaahh RR dd
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MMaapplleeVVaalllleeyyHHwwyy
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SSWWSSuunnsseettBBllvvdd
RR
aa
ii
nn
ii
ee
rr
AAvvee
NN
NE 3rd StNE 3rd St
SW 43rd StSW 43rd St SSEE CC aarrrr RR dd
NE 4th StNE 4th St
SSEERReennttoonn MMaappllee VVaalllleeyy RRdd
LLooggaann
AAvvee
NN
S
R
5
1
5
S
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5
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1
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1
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115566tthh
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111166tthh
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SW 7th StSW 7th St
N 8th StN 8th St
PPuuggeettDDrrSS EE
RR
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SSWW 2277tthh SStt
BB
ee
nn
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SE 128th StSE 128th St
II
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SE 192nd StSE 192nd St
SE 60th StSE 60th St
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SE 208th StSE 208th St
SE 72nd StSE 72nd St
RRaaiinniieerrAAvvee
SS
111166tthh
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SSEE
S 128th StS 128th St
NNeewwccaassttllee WWaayy
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SW 41st StSW 41st St
114400tthh
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NE 12th StNE 12th St
BB
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SSEE 116644tthh SStt
114488tthh
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SS EE JJoonneess RRdd
SS EE 22 00 44 tt hh WW aayy
SW 34th StSW 34th St
SE 144th StSE 144th St
114488tthh
AAvvee
SSEE
115544tthhPPllSSEE
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aa
kk
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aa
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a
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y
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d
,§-405
,§-405
,§-405
µ0 1 2Miles
Flow Control Application Map
Reference 15-A
Date: 01/09/2014
Flow Control Standards
Peak Rate Flow Control Standard (Existing Site Conditions)
Flow Control Duration Standard (Existing Site Conditions)
Flow Control Duration Standard (Forested Conditions)
Flood Problem Flow
Unincorporated King County Flow Control Standards
Renton City Limits
Potential Annexation Area
PROJECT SITE
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
—————————————————————————————————
MGS FLOOD
PROJECT REPORT
Program Version: MGSFlood 4.63
Program License Number: 200410007
Project Simulation Performed on: 09/24/2024 3:40 PM
Report Generation Date: 09/24/2024 3:40 PM
—————————————————————————————————
Input File Name: Solera Phase 2 Flow Control.fld
Project Name: Entire Site Solera Townhomes (Phase 2)
Analysis Title: Flow Control Analysis
Comments:
———————————————— PRECIPITATION INPUT ————————————————
Computational Time Step (Minutes): 15
Extended Precipitation Time Series Selected
Full Period of Record Available used for Routing
Climatic Region Number: 3
Precipitation Station : 95004005 Puget West 40 in_5min 10/01/1939-10/01/2097
Evaporation Station : 951040 Puget West 40 in MAP
Evaporation Scale Factor : 0.750
HSPF Parameter Region Number: 1
HSPF Parameter Region Name : Ecology Default
********** Default HSPF Parameters Used (Not Modified by User) ***************
********************** WATERSHED DEFINITION ***********************
Predevelopment/Post Development Tributary Area Summary
Predeveloped Post Developed
Total Subbasin Area (acres) 3.860 3.860
Area of Links that Include Precip/Evap (acres) 0.000 0.000
Total (acres) 3.860 3.860
----------------------SCENARIO: PREDEVELOPED
Number of Subbasins: 1
---------- Subbasin : Subbasin 1 ----------
-------Area (Acres) --------
A/B, Lawn, Flat 1.270
PARKING/FLAT 2.590
BLOCKS C AND D FLOWCONTROL MODELING REPORT
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
----------------------------------------------
Subbasin Total 3.860
----------------------SCENARIO: POSTDEVELOPED
Number of Subbasins: 2
---------- Subbasin : Block C ----------
-------Area (Acres) --------
A/B, Lawn, Flat 0.630
ROADS/FLAT 0.480
ROOF TOPS/FLAT 1.100
SIDEWALKS/FLAT 0.370
----------------------------------------------
Subbasin Total 2.580
---------- Subbasin : Block D ----------
-------Area (Acres) --------
A/B, Lawn, Flat 0.530
ROADS/FLAT 0.250
ROOF TOPS/FLAT 0.430
SIDEWALKS/FLAT 0.070
----------------------------------------------
Subbasin Total 1.280
************************* LINK DATA *******************************
----------------------SCENARIO: PREDEVELOPED
Number of Links: 0
************************* LINK DATA *******************************
----------------------SCENARIO: POSTDEVELOPED
Number of Links: 1
------------------------------------------
Link Name: New Copy Lnk1
Link Type: Copy
Downstream Link: None
**********************FLOOD FREQUENCY AND DURATION STATISTICS*******************
----------------------SCENARIO: PREDEVELOPED
Number of Subbasins: 1
Number of Links: 0
----------------------SCENARIO: POSTDEVELOPED
Number of Subbasins: 2
Number of Links: 1
BLOCKS C AND D FLOWCONTROL MODELING REPORT
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
***********Groundwater Recharge Summary *************
Recharge is computed as input to Perlnd Groundwater Plus Infiltration in Structures
Total Predeveloped Recharge During Simulation
Model Element Recharge Amount (ac-ft)
-----------------------------------------------------------------------------------------------
Subbasin: Subbasin 1 427.906
_____________________________________
Total: 427.906
Total Post Developed Recharge During Simulation
Model Element Recharge Amount (ac-ft)
-----------------------------------------------------------------------------------------------
Subbasin: Block C 212.268
Subbasin: Block D 178.575
Link: New Copy Lnk1 0.000
_____________________________________
Total: 390.843
Total Predevelopment Recharge is Greater than Post Developed
Average Recharge Per Year, (Number of Years= 158)
Predeveloped: 2.708 ac-ft/year, Post Developed: 2.474 ac-ft/year
***********Water Quality Facility Data *************
----------------------SCENARIO: PREDEVELOPED
Number of Links: 0
----------------------SCENARIO: POSTDEVELOPED
Number of Links: 1
********** Link: New Copy Lnk1 **********
2-Year Discharge Rate : 1.102 cfs
15-Minute Timestep, Water Quality Treatment Design Discharge
On-line Design Discharge Rate (91% Exceedance): 0.43 cfs
Off-line Design Discharge Rate (91% Exceedance): 0.25 cfs
Infiltration/Filtration Statistics--------------------
Inflow Volume (ac-ft): 1219.58
Inflow Volume Including PPT-Evap (ac-ft): 1219.58
Total Runoff Infiltrated (ac-ft): 0.00, 0.00%
Total Runoff Filtered (ac-ft): 0.00, 0.00%
Primary Outflow To Downstream System (ac-ft): 1219.58
Secondary Outflow To Downstream System (ac-ft): 0.00
Volume Lost to ET (ac-ft): 0.00
Percent Treated (Infiltrated+Filtered+ET)/Total Volume: 0.00%
BLOCKS C AND D FLOWCONTROL MODELING REPORT
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
***********Compliance Point Results *************
Scenario Predeveloped Compliance Subbasin: Subbasin 1
Scenario Postdeveloped Compliance Link: New Copy Lnk1
*** Point of Compliance Flow Frequency Data ***
Recurrence Interval Computed Using Gringorten Plotting Position
Predevelopment Runoff Postdevelopment Runoff
Tr (Years) Discharge (cfs) Tr (Years) Discharge (cfs)
----------------------------------------------------------------------------------------------------------------------
2-Year 1.063 2-Year 1.102
5-Year 1.336 5-Year 1.392
10-Year 1.559 10-Year 1.625
25-Year 1.877 25-Year 1.955
50-Year 2.334 50-Year 2.433
100-Year 2.796 100-Year 2.915
200-Year 2.928 200-Year 3.052
500-Year 3.097 500-Year 3.228
** Record too Short to Compute Peak Discharge for These Recurrence Intervals
**** LID Duration Performance ****
Excursion at Predeveloped 8%Q2 (Must be Less Than 0%): 4.1% FAIL
Maximum Excursion from 8%Q2 to 50%Q2 (Must be Less Than 0%): 16.2% FAIL
-------------------------------------------------------------------------------------------------
LID DURATION DESIGN CRITERIA: FAIL
-------------------------------------------------------------------------------------------------
BLOCKS C AND D FLOWCONTROL MODELING REPORT
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
—————————————————————————————————
MGS FLOOD
PROJECT REPORT
Program Version: MGSFlood 4.63
Program License Number: 200410007
Project Simulation Performed on: 09/24/2024 3:35 PM
Report Generation Date: 09/24/2024 3:35 PM
—————————————————————————————————
Input File Name: Solera Phase 2 Water Quality.fld
Project Name: Entire Site Solera Townhomes (Phase 2)
Analysis Title: Water Qualityl Analysis
Comments:
———————————————— PRECIPITATION INPUT ————————————————
Computational Time Step (Minutes): 15
Extended Precipitation Time Series Selected
Full Period of Record Available used for Routing
Climatic Region Number: 3
Precipitation Station : 95004005 Puget West 40 in_5min 10/01/1939-10/01/2097
Evaporation Station : 951040 Puget West 40 in MAP
Evaporation Scale Factor : 0.750
HSPF Parameter Region Number: 1
HSPF Parameter Region Name : Ecology Default
********** Default HSPF Parameters Used (Not Modified by User) ***************
********************** WATERSHED DEFINITION ***********************
Predevelopment/Post Development Tributary Area Summary
Predeveloped Post Developed
Total Subbasin Area (acres) 0.794 0.730
Area of Links that Include Precip/Evap (acres) 0.000 0.064
Total (acres) 0.794 0.794
----------------------SCENARIO: PREDEVELOPED
Number of Subbasins: 1
---------- Subbasin : Subbasin 1 ----------
-------Area (Acres) --------
PARKING/FLAT 0.794
----------------------------------------------
BLOCKS C AND D WATERQUALITY MODELING REPORT
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Subbasin Total 0.794
----------------------SCENARIO: POSTDEVELOPED
Number of Subbasins: 2
---------- Subbasin : Block C ----------
-------Area (Acres) --------
ROADS/FLAT 0.480
----------------------------------------------
Subbasin Total 0.480
---------- Subbasin : Block D ----------
-------Area (Acres) --------
ROADS/FLAT 0.250
----------------------------------------------
Subbasin Total 0.250
************************* LINK DATA *******************************
----------------------SCENARIO: PREDEVELOPED
Number of Links: 0
************************* LINK DATA *******************************
----------------------SCENARIO: POSTDEVELOPED
Number of Links: 2
------------------------------------------
Link Name: New Copy Lnk1
Link Type: Copy
Downstream Link: None
------------------------------------------
Link Name: On-Site Bioretention
Link Type: Ecology Bioretention Facility
Downstream Link: None
Floor Elevation (ft) : 100.00
Riser Crest Elevation (ft) : 100.50
Storage Depth (ft) : 0.50
Bottom Length (ft) : 100.0
Bottom Width (ft) : 28.0
Bottom Slope (ft/ft) : 0.000
Side Slopes (ft/ft) : Z1= 0.00 Z2= 0.00 Z3= 0.00 Z4= 0.00
Bottom Area (sq-ft) : 2800.
Area at Riser Crest El (sq-ft) : 2,800.
(acres) : 0.064
Volume at Riser Crest (cu-ft) : 1,400.
(ac-ft) : 0.032
BLOCKS C AND D WATERQUALITY MODELING REPORT
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Infiltration on Bottom and Sideslopes Selected
Soil Properties
Layer No Soil Name Thickness (ft)
1 ASTM 100 0.010
2 SMMWW 12 in/hr (Ecol 1.500
3 GRAVEL 0.010
KSat Safety Factor: 2.0
Native Soil Infiltration Rate (in/hr) : 0.70
Underdrain Not Present
Riser Geometry
Riser Structure Type : Circular
Riser Diameter (in) : 6.00
Common Length (ft) : 0.000
Riser Crest Elevation : 100.50 ft
Hydraulic Structure Geometry
Number of Devices: 0
**********************FLOOD FREQUENCY AND DURATION STATISTICS*******************
----------------------SCENARIO: PREDEVELOPED
Number of Subbasins: 1
Number of Links: 0
----------------------SCENARIO: POSTDEVELOPED
Number of Subbasins: 2
Number of Links: 2
********** Link: On-Site Bioretention ********** Link WSEL
Stats
WSEL Frequency Data(ft)
(Recurrence Interval Computed Using Gringorten Plotting Position)
Tr (yrs) WSEL Peak (ft)
======================================
1.05-Year 100.006
1.11-Year 100.007
1.25-Year 100.010
2.00-Year 100.218
3.33-Year 100.489
5-Year 100.559
10-Year 100.612
25-Year 100.640
50-Year 100.666
100-Year 100.675
BLOCKS C AND D WATERQUALITY MODELING REPORT
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
***********Groundwater Recharge Summary *************
Recharge is computed as input to Perlnd Groundwater Plus Infiltration in Structures
Total Predeveloped Recharge During Simulation
Model Element Recharge Amount (ac-ft)
-----------------------------------------------------------------------------------------------
Subbasin: Subbasin 1 0.000
_____________________________________
Total: 0.000
Total Post Developed Recharge During Simulation
Model Element Recharge Amount (ac-ft)
-----------------------------------------------------------------------------------------------
Subbasin: Block C 0.000
Subbasin: Block D 0.000
Link: New Copy Lnk1 Not Applicable
Link: On-Site Bioretention 322.318
_____________________________________
Total: 322.318
Total Predevelopment Recharge is Less than Post Developed
Average Recharge Per Year, (Number of Years= 158)
Predeveloped: 0.000 ac-ft/year, Post Developed: 2.040 ac-ft/year
***********Water Quality Facility Data *************
----------------------SCENARIO: PREDEVELOPED
Number of Links: 0
----------------------SCENARIO: POSTDEVELOPED
Number of Links: 2
********** Link: On-Site Bioretention **********
2-Year Discharge Rate : 0.000 cfs
15-Minute Timestep, Water Quality Treatment Design Discharge
On-line Design Discharge Rate (91% Exceedance): 0.12 cfs
Off-line Design Discharge Rate (91% Exceedance): 0.07 cfs
Infiltration/Filtration Statistics--------------------
Inflow Volume (ac-ft): 329.40
Inflow Volume Including PPT-Evap (ac-ft): 333.32
Total Runoff Infiltrated (ac-ft): 322.32, 96.70%
Total Runoff Filtered (ac-ft): 0.00, 0.00%
Primary Outflow To Downstream System (ac-ft): 2.02
Secondary Outflow To Downstream System (ac-ft): 0.00
Volume Lost to ET (ac-ft): 8.98
Percent Treated (Infiltrated+Filtered+ET)/Total Volume: 99.39%
BLOCKS C AND D WATERQUALITY MODELING REPORT
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
***********Compliance Point Results *************
Scenario Predeveloped Compliance Subbasin: Subbasin 1
Scenario Postdeveloped Compliance Link: On-Site Bioretention
*** Point of Compliance Flow Frequency Data ***
Recurrence Interval Computed Using Gringorten Plotting Position
Predevelopment Runoff Postdevelopment Runoff
Tr (Years) Discharge (cfs) Tr (Years) Discharge (cfs)
----------------------------------------------------------------------------------------------------------------------
2-Year 0.322 2-Year 0.000
5-Year 0.408 5-Year 7.518E-02
10-Year 0.467 10-Year 0.185
25-Year 0.570 25-Year 0.246
50-Year 0.715 50-Year 0.292
100-Year 0.857 100-Year 0.306
200-Year 0.897 200-Year 0.313
500-Year 0.949 500-Year 0.322
** Record too Short to Compute Peak Discharge for These Recurrence Intervals
**** LID Duration Performance ****
Excursion at Predeveloped 8%Q2 (Must be Less Than 0%): -99.5% PASS
Maximum Excursion from 8%Q2 to 50%Q2 (Must be Less Than 0%): -96.9% PASS
-------------------------------------------------------------------------------------------------
MEETS ALL LID DURATION DESIGN CRITERIA: PASS
-------------------------------------------------------------------------------------------------
BLOCKS C AND D WATERQUALITY MODELING REPORT
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix E
Appendix E
On-Site BMPs
(TO BE PROVIDED WITH CONSTRUCTION DOCUMENTS)
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix F
Appendix F
Pipe Conveyance
(TO BE PROVIDED WITH CONSTRUCTION DOCUMENTS)
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix G
Appendix G
Erosion Control Plan and Details
(TO BE PROVIDED WITH CONSTRUCTION DOCUMENTS)
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix H
Appendix H
SWPPP
(TO BE PROVIDED WITH CONSTRUCTION DOCUMENTS)
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix I
Appendix I
Bond Quantity Worksheet
(TO BE PROVIDED WITH CONSTRUCTION DOCUMENTS)
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix J
Appendix J
Operation and Maintenance Manual
(TO BE PROVIDED WITH CONSTRUCTION DOCUMENTS)
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix K
Appendix K
Geotechnical Report
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
EarthSolutionsNWLLC
EarthSolutionsNWLLC
Geotechnical Engineering
Geology
Environmental Scientists
Construction Monitoring
1805 -136th Place N.E.,Suite 201 Bellevue,WA 98005
(425)449-4704 Fax (425)449-4711
www.earthsolutionsnw.com
GEOTECHNICAL ENGINEERING STUDY
RENTON HIGHLANDS TOWNHOMES
NORTHEAST SUNSET BOULEVARD
RENTON,WASHINGTON
ES-5719
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
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Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
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Drwn.
Checked Date
Date Proj.No.
Plate
Earth Solutions NWLLC
Geotechnical Engineering,Construction Monitoring
EarthSolutionsNWLLC
EarthSolutionsNWLLC and Environmental Sciences
Vicinity Map
Renton Highlands Townhomes
Renton,Washington
MRS
CGH
01/29/2018
Jan.2018
5719
1
NORTH
NOTE:This plate may contain areas of color.ESNW cannot be
responsible for any subsequent misinterpretation of the information
resulting from black &white reproductions of this plate.
Reference:
King County,Washington
Map 626
By The Thomas Guide
Rand McNally
32nd Edition
SITE
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Plate
Proj.No.
Date
Checked By
Drwn.By
Earth
Solutions
NWLLC
Geotechnical
Engineering,Construction
Monitoring
and
Environmental
Sciences
Earth
Solutions
NWLLC
Earth
Solutions
NWLLC
Boring
Location
Plan
Renton
Highlands
Townhomes
Renton,
Washington
MRS
CGH
01/29/2018
5719
2
NORTH
NOT -TO -SCALE
NOTE:This plate may contain areas of color.ESNW cannot be
responsible for any subsequent misinterpretation of the information
resulting from black &white reproductions of this plate.
NOTE:The graphics shown on this plate are not intended for design
purposes or precise scale measurements,but only to illustrate the
approximate test locations relative to the approximate locations of
existing and /or proposed site features.The information illustrated
is largely based on data provided by the client at the time of our
study.ESNW cannot be responsible for subsequent design changes
or interpretation of the data by others.
LEGEND
Approximate Location of
ESNW Boring,Proj.No.
ES-5719,Dec.2017
Subject Site
Existing Building
KIRKLAND AVENUE N.E.
N.E. SUNSET BO ULEVAR D
N.E. 12TH STREET
HARRINGTON AVENUE N.E.
N.E.10TH
STREET
Apartments
SUNSET LANE N.E.
B-1
B-2
B-3
B-4
B-5B-6
B-7
B-8
B-9
B-10
B-11
B-12
B-13
B-1
HARRINGTON PL. N.E.
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Drwn.
Checked Date
Date Proj.No.
Plate
Earth Solutions NWLLC
Geotechnical Engineering,Construction Monitoring
EarthSolutionsNWLLC
EarthSolutionsNWLLC and Environmental Sciences
CANTILEVER &SINGLE TIEBACK WALL
D =Pile Embedment
(per Structural Eng.)
2'
H
(Wall Height)
Active
Earth
Pressure
Passive
Earth
Pressure
EFP=350pcf
EFP=35pcf
Surcharge
(Where Applicable)
Traffic Surcharge or Building Surcharge
(Where Applicable)
Excavation Level
SCHEMATIC ONLY -NOT TO SCALE
NOT A CONSTRUCTION DRAWING
NOTES:
Diagram for pressure distribution illustration
only,not a design drawing.
Passive Pressure includes a factor of
safety of 1.5.
For adjacent building or traffic surcharge
see text.
NOTE:
See text for recommended
Slope Backfill and At-Rest
Pressures.
Neglect Upper 2 feet
of Passive Pressure
Renton Highlands Townhomes
Renton,Washington
MRS
CGH
01/29/2018
Jan.2018
5719
3
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Drwn.
Checked Date
Date Proj.No.
Plate
Earth Solutions NWLLC
Geotechnical Engineering,Construction Monitoring
EarthSolutionsNWLLC
EarthSolutionsNWLLC and Environmental Sciences
NO LOAD ZONE
D =Pile Embedment
(per Structural Eng.)
H
(Wall Height)
Traffic Surcharge or Building Surcharge
(Where Applicable)
Excavation Level
SCHEMATIC ONLY -NOT TO SCALE
NOT A CONSTRUCTION DRAWING
H/4 60
Tieback No Load
Zone
Renton Highlands Townhomes
Renton,Washington
MRS
CGH
01/29/2018
Jan.2018
5719
4
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Drwn.
Checked Date
Date Proj.No.
Plate
Earth Solutions NWLLC
Geotechnical Engineering,Construction Monitoring
EarthSolutionsNWLLC
EarthSolutionsNWLLC and Environmental Sciences
SHORING WALL DRAINAGE
Wood Lagging
Native
Soil
Excavation
PVC Tightline
Structural Fill
Foundation
(per Plan)
Drain Grate
Waterproofing and Insulation
per Architectural Plan
Continuous Sheet Drain
(Placed with Filter Fabric
Facing Shoring)
Concrete Facing
Slab-On-Grade Floor
(per Plan)
NOTE:Drain through wall should be installed at middle of lagging.
SCHEMATIC ONLY -NOT TO SCALE
NOT A CONSTRUCTION DRAWING
Renton Highlands Townhomes
Renton,Washington
MRS
CGH
01/29/2018
Jan.2018
5719
5
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Drwn.
Checked Date
Date Proj.No.
Plate
Earth Solutions NWLLC
Geotechnical Engineering,Construction MonitoringandEnvironmentalSciences
EarthSolutionsNWLLC
EarthSolutionsNWLLC
RETAINING WALL DRAINAGE DETAIL
NOTES:
Free-draining Backfill should consist
of soil having less than 5 percent fines.
Percent passing No.4 sieve should be
25 to 75 percent.
Sheet Drain may be feasible in lieu
of Free-draining Backfill,per ESNW
recommendations.
Drain Pipe should consist of perforated,
rigid PVC Pipe surrounded with 1-inch
Drain Rock.
LEGEND:
Free-draining Structural Backfill
1-inch Drain Rock
18"Min.
Structural
Fill
Perforated Rigid Drain Pipe
(Surround in Drain Rock)
SCHEMATIC ONLY -NOT TO SCALE
NOT A CONSTRUCTION DRAWING
Renton Highlands Townhomes
Renton,Washington
MRS
CGH
01/29/2018
Jan.2018
5719
6
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Drwn.
Checked Date
Date Proj.No.
Plate
Earth Solutions NWLLC
Geotechnical Engineering,Construction Monitoring
and Environmental Sciences
EarthSolutionsNWLLC
EarthSolutionsNWLLC
FOOTING DRAIN DETAIL
Slope
Perforated Rigid Drain Pipe
(Surround in Drain Rock)
18"Min.
NOTES:
Do NOT tie roof downspouts
to Footing Drain.
Surface Seal to consist of
12"of less permeable,suitable
soil.Slope away from building.
LEGEND:
Surface Seal:native soil or
other low-permeability material.
1-inch Drain Rock
SCHEMATIC ONLY -NOT TO SCALE
NOT A CONSTRUCTION DRAWING
Renton Highlands Townhomes
Renton,Washington
MRS
CGH
01/29/2018
Jan.2018
5719
7
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Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
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Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Solera Phase 2: Block C and Block D – New Home Co.
Appendix L
Appendix L
Infiltration Test Report
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Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Geotechnical Engineering,Construction
Observation/Testing and Environmental Services
Drwn.CAM
Checked CGH Date July 2018
Date 07/10/2018 Proj.No.5719.02
Plate 1
Earth Solutions NWLLCEarthSolutionsNWLLC
EarthSolutionsNWLLC
Vicinity Map
Solera
Renton,Washington
NORTH
NOTE:This plate may contain areas of color.ESNW cannot be
responsible for any subsequent misinterpretation of the information
resulting from black &white reproductions of this plate.
Reference:
King County,Washington
Map 626
By The Thomas Guide
Rand McNally
32nd Edition
SITE
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Geotechnical
Engineering,Construction
Observation/Testing
and
Environmental
Services
Plate
Proj.No.
Date
Checked By
Drwn.By
Earth
Solutions
NWLLC
Earth
Solutions
NWLLC
Earth
Solutions
NWLLC
Subsurface
Exploration
Plan
Solera
Renton,
Washington
CAM
CGH
07/10/2018
5719.02
2
NORTH
NOT -TO -SCALE
NOTE:This plate may contain areas of color.ESNW cannot be
responsible for any subsequent misinterpretation of the information
resulting from black &white reproductions of this plate.
NOTE:The graphics shown on this plate are not intended for design
purposes or precise scale measurements,but only to illustrate the
approximate test locations relative to the approximate locations of
existing and /or proposed site features.The information illustrated
is largely based on data provided by the client at the time of our
study.ESNW cannot be responsible for subsequent design changes
or interpretation of the data by others.
LEGEND
Approximate Location of
ESNW Test Pit,Proj.No.
ES-5719.02,June 2018
Approximate Location of
ESNW Boring,Proj.No.
ES-5719,Dec.2017
Subject Site
Existing Building
B-1
TP-1
KIRKLAND AVENUE N.E.
N.E. SUNSET BO ULEVAR D
N.E. 12TH STREET
HARRINGTON AVENUE N.E.
N.E.10TH
STREET
Apartments
SUNSET LANE N.E.B-1
B-2
B-3
B-4
B-5B-6
B-7
B-8
B-9
B-10
B-11
B-12
B-13
HARRINGTON PL. N.E.
TP-1
TP-4
TP-2
TP-3
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Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
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Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
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Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD
Docusign Envelope ID: 4AA8FA8C-A903-466F-A4D1-007588C5D8AD