HomeMy WebLinkAboutRS_VMAC_Reno+Expand_DrainageRpt_TIR_251125_v11301 Fifth Avenue, Suite 3200
Seattle, Washington 98101
T: 206 292 1200 www.mka.com
November 2003
CONCEPTUAL TECHNICAL INFORMATION
REPORT
Virgina Mason Athletic Center
Renton, Washington
November 24, 2025
C o n c e p t u a l T e c h n i c a l I n f o r m a t i o n R e p o r t November 24, 2025
Virgina Mason Athletic Center, Renton, Washington
ii
C O N T E N T S
1 - P R O J E C T O V E R V I E W 1
2 - C O N D I T I O N S A N D R E Q U I R E M E N T S S U M M A R Y 2
3 - O F F S I T E A N A L Y S I S 4
4 - F L O W C O N T R O L , L O W I M P A C T D E V E L O P M E N T (L I D ), A N D W A T E R
Q U A L I T Y F A C I L I T Y A N A L Y S I S A N D D E S I G N 4
5 - C O N V E Y A N C E S Y S T E M S A N A L Y S I S A N D D E S I G N 6
6 - S P E C I A L R E P O R T S A N D S T U D I E S 6
7 - O T H E R P E R M I T S 6
8 - C S W P P P A N A L Y S I S A N D D E S I G N 6
9 - B O N D Q U A N T I T I E S , F A C I L I T Y S U M M A R Y , A N D D E C L A R A T I O N O F
C O V E N A N T 7
1 0 - O P E R A T I O N S A N D M A I N T A N E N C E M A N U A L 7
F I G U R E S
FIGURE 1: CONCEPTUAL TIR WORKSHEET
FIGURE 2: SITE LOCATION
FIGURE 3: DRAINAGE MAP
FIGURE 4: SOILS MAP
FIGURE 5: PROPOSED SURFACE CONDITIONS AND WATER QUALITY TREATMENT BASIN
A P P E N D I C I E S
APPENDIX A: PLANS
APPENDIX B: CALCULATIONS (TO BE INCLUDED IN FULL TIR AS PART OF CONSTRUCTION PERMIT APPLICATION)
APPENDIX C: CSWPPS (TO BE INCLUDED IN FULL TIR AS PART OF CONSTRUCTION PERMIT APPLICATION)
APPENDIX D: BOND QUANTITIES (TO BE INCLUDED IN FULL TIR AS PART OF CONSTRUCTION PERMIT APPLICATION)
APPENDIX E: DECLARATION OF COVENANT (TO BE INCLUDED IN FULL TIR AS PART OF CONSTRUCTION PERMIT APPLICATION)
APPENDIX F: OPERATIONS AND MAINTENANCE (TO BE INCLUDED IN FULL TIR AS PART OF CONSTRUCTION PERMIT APPLICATION)
APPENDIX G: GEOTECHNICAL REPORT (TO BE INCLUDED IN FULL TIR AS PART OF CONSTRUCTION PERMIT APPLICATION)
C o n c e p t u a l T e c h n i c a l I n f o r m a t i o n R e p o r t November 24, 2025
Virgina Mason Athletic Center, Renton, Washington
1
1 - P R O J E C T O V E R V I E W
This Conceptual Technical Information Report (CTIR) has been prepared by Magnusson Klemencic
Associates (MKA) for the Virginia Mason Athletic Center (VMAC) Renovation and Expansion. This
document has been prepared to address the stormwater management requirements of the City of Renton
Municipal Code (RMC) and the 2022 City of Renton Surface Water Design Manual (2022 RSWDM). A
full Technical Information Report (TIR) with all applicable appendices will be prepared and submitted as
part of the Construction Permit Application.
The VMAC was constructed in 2008 to be the home and practice facility for the Seattle Seahawks. The
site is located at 12 Seahawks Way, Renton, Washington, and is adjacent to Lake Washington. The
VMAC site totals approximately 26.78 acres across two adjacent parcels, 2924059015 and
2924059001. The north parcel (2924059015) where the project will occur is approximately 16.73
acres. Refer to the attached figures, Figure 1: Technical Information Report (TIR) Worksheet and Figure
2: Site Location.
The proposed improvements will take place on the north parcel 2924059015 with a total at-grade
project area of approximately 1.39 acres. The proposed improvements will include building additions
on the easterly and southerly sides of the existing building, a stone entrance plaza for the primary
building entrance, and revised parking areas, walkways, and drive aisles adjacent to the east building
addition. No at-grade improvements are planned within the 100-foot buffer nor 200-foot setback of the
shoreline at this time.
EXISTING SITE HYDROLOGY
In the existing condition, stormwater from the easterly parking areas and drive aisles is collected by a
series of catch basins and conveyed to an existing sand filter located near the southeasterly corner of the
building. The treated stormwater is then conveyed through an existing 18-inch storm drain on the south
side of the building and discharges directly into Lake Washington.
Stormwater from the existing roof drains, walkways and plaza area along the easterly side of the building
are collected by area drains and conveyed in an existing 12-inch storm drain around the north side of
the building and discharges directly into Lake Washington.
Refer to Figure 3: Drainage Map for further information.
DEVELOPED SITE HYDROLOGY
In the proposed condition, stormwater from the existing upstream parking areas and drive aisles,
proposed redeveloped parking areas and drive aisles, and the easterly portion of the relocated plaza
area will be collected by catch basins and trench drains and conveyed through a Modular Wetland
System for water quality treatment, which will replace the existing sand filter. The treated stormwater will
be conveyed through the existing 18-inch storm drain on the south side of the building and will
discharge directly into Lake Washington.
Stormwater runoff associated with the proposed roof addition will be collected by roof drains and along
with a small portion of the proposed pedestrian plaza and revised landscaping will be conveyed through
C o n c e p t u a l T e c h n i c a l I n f o r m a t i o n R e p o r t November 24, 2025
Virgina Mason Athletic Center, Renton, Washington
2
the existing 12-inch storm drain at the northern side of the existing building before discharging directly
into Lake Washington.
2 - C O N D I T I O N S A N D R E Q U I R E M E N T S S U M M A R Y
Per Figure 1.1.2.A, Flow Chart for Determining Type of Drainage Review, of the 2022 RSWDM, the
project will be subject to a Full Drainage Review because it proposes greater than 2,000 square feet of
new plus replaced impervious surface and is not subject to a Simplified Drainage Review, Directed
Drainage Review, or Large Project Drainage Review.
Per Table 1.1.2.A, Requirements Applied Under Each Drainage Review Type, of the 2022 RSWDM, this
report addresses Core Requirements 1 through 9 and Special Requirements 1 through 6 below.
CORE REQUIREMENTS
Core Requirement 1 Core Requirement 1 Core Requirement 1 Core Requirement 1 ---- Discharge at Natural Location: Discharge at Natural Location: Discharge at Natural Location: Discharge at Natural Location: Applies. The project improvements will not
increase or change the existing Lake Washington outfalls located on the VMAC property.
Core Requirement 2 Core Requirement 2 Core Requirement 2 Core Requirement 2 ---- OffOffOffOff----Site Analysis:Site Analysis:Site Analysis:Site Analysis: Does not apply because this project meets Exemption Criteria
#1. Refer to Section 3 – Offsite Analysis of this Report for further information.
Core Requirement 3 Core Requirement 3 Core Requirement 3 Core Requirement 3 ---- Flow Control Facilities: Flow Control Facilities: Flow Control Facilities: Flow Control Facilities: Does not apply because the site has direct discharge(s) to
Lake Washington and meets the Direct Discharge Exemption per Section 1.2.3.1 of the 2022 RSWDM.
In addition, there will be no change to flow regime.
Core Requirement 4 Core Requirement 4 Core Requirement 4 Core Requirement 4 ---- Conveyance System: Conveyance System: Conveyance System: Conveyance System: Applies. Although the amount of impervious area will
increase slightly, the existing onsite drainage system and outfalls were oversized to accommodate
potential pipe settlements and effectively function as an open channels and will ultimately support
additional site improvements. Refer to Section 5 - Conveyance Systems Analysis and Design of this
Report for further information.
Core Requirement 5 Core Requirement 5 Core Requirement 5 Core Requirement 5 ---- Construction Stormwater Pollution Prevention: Construction Stormwater Pollution Prevention: Construction Stormwater Pollution Prevention: Construction Stormwater Pollution Prevention: Applies. A Construction
Stormwater Pollution Prevention (CSWPP) Plan will be provided as part of the full TIR noted above in
Section 1 – Project Overview. This plan will include a Temporary Erosion and Sediment Control (TESC)
Plan and Stormwater Pollution Prevention and Spill (SWPPS) Plan. Refer to Section 8 – CSWPPP Analysis
and Design of this Report for further information.
Core Requirement 6 Core Requirement 6 Core Requirement 6 Core Requirement 6 ---- Maintenance and Operations: Maintenance and Operations: Maintenance and Operations: Maintenance and Operations: Applies. The operations and maintenance manual
will be provided as part of the full TIR noted above in Section 1 – Project Overview. Refer to Section 10
– Operation and Maintenance Manual of this Report for further information.
Core Requirement 7 Core Requirement 7 Core Requirement 7 Core Requirement 7 ---- Financial Guarantees and Liability:Financial Guarantees and Liability:Financial Guarantees and Liability:Financial Guarantees and Liability: Applies. A Bond Quantity Worksheet for
improvements infrastructure will be provided as part of the full TIR noted above in Section 1 – Project
Overview. The project will need to post a bond, assignment of funds, or certified check in the amount
identified in the full TIR. Refer to Section 9 – Bond Quantities, Facility Summary, and Declaration of
Covenant of this Report for further information.
C o n c e p t u a l T e c h n i c a l I n f o r m a t i o n R e p o r t November 24, 2025
Virgina Mason Athletic Center, Renton, Washington
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Core Requirement 8 Core Requirement 8 Core Requirement 8 Core Requirement 8 ---- Water Quality Facilities: Water Quality Facilities: Water Quality Facilities: Water Quality Facilities: Applies for two (2) reasons.
1. The project improvements will result in more than 5,000 square feet of new plus replaced
pollution generating impervious surface (PGIS).
2. The existing water quality treatment facility (sand filter) will be removed and replaced with a new
water quality treatment device.
Because the project is considered commercial land use, enhanced basic water quality treatment is
required. Water quality treatment will be provided by an Underground Modular Wetland System. Refer
to Section 4 - Flow Control, Low Impact Development (LID) and Water Quality Facility Analysis and
Design of this Report for further information.
Core Requirement 9 Core Requirement 9 Core Requirement 9 Core Requirement 9 ---- OnOnOnOn----Site BMPs: Site BMPs: Site BMPs: Site BMPs: Applies because the project improvements will result in more than
2,000 square feet of new plus replaced impervious surface. Therefore, the evaluation of BMP feasibility
for all target surfaces is required. The project site is larger than 22,000 square feet and per section
1.2.9.2 of the 2022 RSWDM, this project is subject to Large Lot BMP Requirements. Refer to Section 4 -
Flow Control, Low Impact Development (LID), and Water Quality Facility Analysis and Design of this
Report for further information.
SPECIAL REQUIREMENTS
Special Requirement 1 Special Requirement 1 Special Requirement 1 Special Requirement 1 ---- Other Adopted AreaOther Adopted AreaOther Adopted AreaOther Adopted Area----Specific Requirements: Specific Requirements: Specific Requirements: Specific Requirements:
Master Drainage Plans (MDPs): Does not apply because this project is not covered by a Master
Drainage Plan.
Basin Plans (BPs): Does not apply because this project is not covered by a Basin Plan.
Salmon Conservation Plans (SCPs): Does not apply because this project is not covered by a
Salmon Conservation Plan.
Lake Management Plans: Does not apply because this project is not covered by a Lake
Management Plan.
Hazard Mitigation Plan: Does not apply because this project is not covered by a Hazard
Mitigation Plan.
Shared Facility Drainage Plans (SFDPs): Does not apply because this project is not covered by a
Shared Facility Drainage Plans.
Special Requirement 2Special Requirement 2Special Requirement 2Special Requirement 2 ---- Flood Hazard Area Delineation: Flood Hazard Area Delineation: Flood Hazard Area Delineation: Flood Hazard Area Delineation: Does not apply because according to King
County iMap, this project is not located within nor adjacent to a Flood Hazard Area.
Special Requirement 3Special Requirement 3Special Requirement 3Special Requirement 3 ---- Flood Protection Facilities: Flood Protection Facilities: Flood Protection Facilities: Flood Protection Facilities: Does not apply because the project does not have
any flood protection facilities and does not propose any flood protection facilities.
Special Requirement 4Special Requirement 4Special Requirement 4Special Requirement 4 ---- Source Control: Source Control: Source Control: Source Control: Does not apply because the project does not propose any
conditions which require source control measures.
Special Requirement 5Special Requirement 5Special Requirement 5Special Requirement 5 ---- Oil Control: Oil Control: Oil Control: Oil Control: Does not apply because the project is not considered a high-use
site.
Special Requirement 6Special Requirement 6Special Requirement 6Special Requirement 6 ---- Aquifer Protection Area: Aquifer Protection Area: Aquifer Protection Area: Aquifer Protection Area: Does not apply because the project is not located
within an aquifer protection area.
C o n c e p t u a l T e c h n i c a l I n f o r m a t i o n R e p o r t November 24, 2025
Virgina Mason Athletic Center, Renton, Washington
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3 - O F F S I T E A N A L Y S I S
The project meets Exemption #1 and is not required to complete an offsite analysis. Stormwater from
the project area will maintain the current connections to the existing onsite drainage system, with one
connection on the north side of the building and one on the south. Refer to Section 1 – Project
Overview for further information about the existing and proposed site hydrology.
As in the current conditions, stormwater from the project area directly discharges into Lake Washington
through the existing outfalls on the VMAC property. The northern outfall is located approximately 470
feet downstream of the project area and the southern outfall is located approximately 590 feet
downstream of the project area. There is a small amount of upstream contributing area from the existing
driveways. Refer to Figure 5 – Proposed Conditions and Water Quality Treatment Basin for the location
of the upstream areas.
Although the amount of impervious area will increase slightly, the existing onsite drainage system and
outfalls were oversized to accommodate potential pipe settlements and effectively function as an open
channels and will ultimately support additional site improvements. Refer to Figure 3 – Drainage Map for
further information.
4 - F L O W C O N T R O L , L O W I M P A C T D E V E L O P M E N T (L I D ), A N D W A T E R
Q U A L I T Y F A C I L I T Y A N A L Y S I S A N D D E S I G N
EXISTING SITE HYDROLOGY
Refer to Section 1 Project Overview.
DEVELOPED SITE HYDROLOGY
Refer to Section 1 Project Overview.
PREFORMANCE STANDARDS
Flow Control is not required: As stated previously in Section 2 Conditions and Requirements Summary,
flow control is not required.
Water Quality Treatment is required: Refer to the Water Quality System paragraphs below for the
required water quality standards.
FLOW CONTROL SYSTEM
As stated previously, flow control is not required. Refer to Section 2 Conditions and Requirements
Summary for further information.
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Virgina Mason Athletic Center, Renton, Washington
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LID (ON-SITE BMPS)
The project improvements will result in more than 2,000 square feet of new plus replaced impervious
surface. Therefore, the evaluation of best management practice (BMP) feasibility for all target surfaces is
required. The project site is larger than 22,000 square feet, therefore, per section 1.2.9.2 of the 2022
RSWDM, this project is subject to Large Lot BMP Requirements.
Infiltration is infeasible as the parcel is subject to compliance with the restrictive covenant concerning
contaminated soils as identified in King County recording number 20100804000254. These restrictions
by the Washington State Department of Ecology include "Restrict All Ground Water Extraction/Well
Installation, Restrict Land Use, Prohibit Soil Disturbance, Ongoing Maintenance of Remedy, Prohibit
Removal or Alteration of Existing Buildings".
Below is a summary of the BMP Evaluation that identifies why On-Site BMPs are infeasible for this project
per Appendix C of the 2022 RSWDM:
a. Full Dispersion:Full Dispersion:Full Dispersion:Full Dispersion: Full dispersion is infeasible, per section C.2.1.1 due to a lack of native
vegetation.
b. Full Infiltration of Roof Runoff:Full Infiltration of Roof Runoff:Full Infiltration of Roof Runoff:Full Infiltration of Roof Runoff: As stated above, infiltration is infeasible.
c. Because the target impervious surfaces cannot be mitigated by Requirements A and B above, the
following have been reviewed and identified as infeasible as noted:
Full Infiltration:Full Infiltration:Full Infiltration:Full Infiltration: As stated above, infiltration is infeasible.
Limited Infiltration:Limited Infiltration:Limited Infiltration:Limited Infiltration: As stated above, infiltration is infeasible.
Bioretention:Bioretention:Bioretention:Bioretention: Per Section C.2.6, Bioretention Infeasibility Criteria List (Part D of Criteria
#13) for properties with known soil contamination, bioretention is infeasible. In
addition, per Section C.2.6.1.5 Bioretention with underdrains are not permitted to meet
Core Requirement #9 On-Site BMPs.
Permeable Pavement:Permeable Pavement:Permeable Pavement:Permeable Pavement: Per Section C.2.7, Permeable Pavement Infeasibility Criteria List
(Part D of Criteria #13) for properties with known soil contamination, permeable
pavement is infeasible.
d. Basic Dispersion:Basic Dispersion:Basic Dispersion:Basic Dispersion: Basic dispersion is infeasible per section C.2.4.1 due to the limited available
vegetative flow path.
As shown above, all required BMPs are considered to be infeasible and therefore, the project does not
currently propose the implementation of any on-site BMPs.
WATER QUALITY SYSTEM
As stated in Section 2 – Conditions and Requirements Summary, Water Quality Treatment will be
required for two (2) reasons.
1. The project improvements will result in more than 5,000 square feet of new plus replaced PGIS.
2. The existing water quality treatment facility (sand filter) will be removed and replaced with a new
water quality treatment device.
Because the athletic complex is considered to be a commercial land use, Enhanced Basic Water Quality
Treatment is required.
Water quality treatment was previously provided by a sand filter for the PGIS surfaces easterly of the
existing building. As part of the redevelopment of the easterly expansion and site changes, the existing
sand filter will be removed. Water quality treatment for the proposed driveway and parking areas as well
as the existing PGIS that was tributary to and treated by the existing sand filter, will be provided by a
C o n c e p t u a l T e c h n i c a l I n f o r m a t i o n R e p o r t November 24, 2025
Virgina Mason Athletic Center, Renton, Washington
6
Modular Wetland System (MWS) which has General Use Level Designation (GULD) approval by Ecology
for enhanced treatment. A copy of the GULD approval will be provided in Appendix B for the
Construction Permit Submittal. Because detention facilities are not required, per section 6.2.1 of the
2022 RSWDM, treatment will be provided for the water quality design flow rate, which will be at or
below 91% of the total runoff volume. The WWHM output for the water quality design flow rate will be
provided in Appendix B of the full TIR as noted above in Section 1 – Project Overview.
Sizing of the MWS will be determined by Contech Engineered Solutions prior to preparation of the full
TIR and Construction Permit Application. A preliminary 8-foot by 12-foot footprint is anticipated. A copy
of the MWS detail and sizing letter will be included in Appendix B of the full TIR as noted above in
Section 1 – Project Overview.
5 - C O N V E Y A N C E S Y S T E M S A N A L Y S I S A N D D E S I G N
Although the amount of impervious area will increase slightly, the existing onsite drainage system and
outfalls were oversized to accommodate potential pipe settlements and effectively function as an open
channels and will ultimately support additional site improvements.
Conveyance system calculations, demonstrating pipe capacity and performance will be provided in
Appendix B of the full TIR as noted above in Section 1 – Project Overview.
6 - S P E C I A L R E P O R T S A N D S T U D I E S
A copy of the Geotechnical Report will be included in Appendix G of the full TIR as noted above in
Section 1 – Project Overview.
7 - O T H E R P E R M I T S
A NPDES General Permit for Construction (Notice of Intent) will be required for this project.
8 - C S W P P P A N A L Y S I S A N D D E S I G N
ESC PLAN ANALYSIS AND DESIGN
A Temporary Erosion and Sediment Control (TESC) Plan, Construction Stormwater Pollution Prevention
Plan (CSWPPP), and Stormwater Pollution Prevention and Spill (SWPPS) Plan will be prepared and
included in the full TIR as noted above in Section 1 – Project Overview.
Because there will be excavations on the site, the overall approach for the ESC Plan is the separate and
manage general construction stormwater separately from construction stormwater that contacts potential
contaminated soils. The approach for general construction stormwater will be to implement temporary
erosion and sediment control measures to prevent sediment-laden water from leaving the project area as
shown on the site improvements (temporary erosion and sediment control) plans. During construction,
general construction stormwater runoff from the project area will be intercepted and pumped to a
temporary sediment settling tank(s) as necessary, to prevent sediment-laden water from entering the
C o n c e p t u a l T e c h n i c a l I n f o r m a t i o n R e p o r t November 24, 2025
Virgina Mason Athletic Center, Renton, Washington
7
existing storm drain infrastructure. A copy of the sediment tank sizing calculations will be included in
Appendix B as noted above in Section 1 – Project Overview. Catch basin inserts will be installed at catch
basins and area drains within and downstream of the project area. Additional temporary erosion and
sediment control measures may be implemented, including, but not limited to silt fencing, straw wattles,
wheel wash, and construction fencing.
Construction stormwater that contacts potential contaminated soils will be intercepted from joining with
general construction stormwater and pumped to a separate holding tank prior to monitoring and
removal from the site to an approved receiving site.
Strict maintenance and monitoring criteria will be provided so that the temporary erosion and sediment
control systems are functioning properly throughout the duration of construction. Further information
about the ESC measures that will be implemented during the construction of this project will be provided
in Appendix C as noted above in Section 1 – Project Overview.
SWPPS PLAN ANALYSIS AND DESIGN
The project will include pollution prevention BMPs for construction activities which include concrete work,
sawcutting, material delivery, storage and containment. A Stormwater Pollution Prevention and Spill Plan
will be prepared for this project and included in Appendix C: CSWPPP, of the full TIR as noted above in
Section 1 – Project Overview.
9 - B O N D Q U A N T I T I E S , F A C I L I T Y S U M M A R Y , A N D D E C L A R A T I O N O F
C O V E N A N T
A Bond Quantities Worksheet will be included in Appendix D: Bond Quantities, of the full TIR as noted
above in Section 1 – Project Overview.
A Declaration of Covenant will be provided in Appendix E: Declaration of Covenant, of the full TIR as
noted above in Section 1 – Project Overview, for the proposed on-site water quality facility.
1 0 - O P E R A T I O N S A N D M A I N T A N E N C E M A N U A L
An Operations and Maintenance Manual will be prepared and included in Appendix F: Operations and
Maintenance, of the full TIR as noted above in Section 1 – Project Overview. The manual will include
the operations and maintenance recommendations for pipes, catch basins, and the Modular Wetland
System (water quality facility).
1301 Fifth Avenue, Suite 3200
Seattle, Washington 98101
T: 206 292 1200 www.mka.com
November 2003
FIGURES
CITY OF RENTON SURFACE WATER DESIGN MANUAL
2022 City of Renton Surface Water Design Manual 6/22/2022
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
Seattle Seahawks
12 Seahawks Way, Renton WA 98056
Steven D. Haluschak
Magnusson Klemencic Assoiciates
Direct: (206) 215-8290, Office: (206) 755-8090
VMAC Building Expansion and Renovation
TBD
24 North
5 East
29
12 Seahawks Way, Renton WA 98056
X
X Shoreline Substantial Development Permit
X
November 24, 2025
X
November 24, 2025
X
VMAC Building Expansion and Renovation Project
Conceptual Technical Information Report
Figure 1
(425) 449 - 9101
REFERENCE 8: PLAN REVIEW FORMS AND WORKSHEET
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
6/22/2022 2022 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 ______________________
NA
NA
X Gypsy Creek (60-inch underground pipe)
X Lake Washington
NA
NA
Lake Washington - East
TBD
TBD
Potential monitoring for construction stormwater
contact with potential contaminated soils
REFERENCE 8-A: TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
2022 City of Renton Surface Water Design Manual 6/22/2022
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 9 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: ____________
Conveyance System Spill containment located at: _____________________________
Erosion and Sediment Control /
Construction Stormwater Pollution
Prevention
CSWPP/CESCL/ESC Site Supervisor: _____________________
Contact Phone: _________________________
After Hours Phone: _________________________
Maintenance and Operation Responsibility (circle one): Private / Public
If Private, Maintenance Log Required: Yes / No
Financial Guarantees and Liability Provided: Yes / No
Bellingham Silt Loam
NA
(2) Existing storm drain outfalls
NA
X Contaminated Soils
TBD
TBD
TBD
Will be provided with Construction Permit TIR
0% - 2%Low to Moderate
REFERENCE 8: PLAN REVIEW FORMS AND WORKSHEET
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
6/22/2022 2022 City of Renton Surface Water Design Manual
8-A-4
Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet
per Threshold Discharge Area)
Water Quality (include facility
summary sheet)
Type (circle one): Basic / Sens. Lake / Enhanced Basic / Bog
or Exemption No. _______________________
On-site BMPs Describe:
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:
No Special Requirements (SR) Apply
NA
NA
NA
NA
NA
NA
REFERENCE 8-A: TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
2022 City of Renton Surface Water Design Manual 6/22/2022
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 Description Water Quality Description On-site BMPs Description
Detention
Infiltration
Regional
Facility
Shared
Facility
Other
Vegetated
Flowpath
Wetpool
Filtration
Oil Control
Spill Control
Other
Full Dispersion
Full Infiltration
Limited Infiltration
Rain Gardens
Bioretention
Permeable
Pavement
Basic Dispersion
Soil Amendment
Perforated Pipe
Connection
Other
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Modular Wetland
REFERENCE 8: PLAN REVIEW FORMS AND WORKSHEET
TECHNICAL INFORMATION REPORT (TIR) WORKSHEET
6/22/2022 2022 City of Renton Surface Water Design Manual
8-A-6
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 _______________________________
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
NA
Existing Water Main Easement RelocationX
VIR
G
I
N
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A
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O
N
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LA
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I
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G
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O
N
B
L
V
D
N
E
NE 48TH ST
NE 44TH ST
PROJECT AREA
I-4
0
5
LAKE
WASHINGTON
FIGURE 2: SITE LOCATION
1" =
0200 200
200'
100
scale feet
11
/
2
1
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0
2
5
3
:
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LAKE
WASHINGTON
27
27
27
PROJECT AREA
EXISTING PROJECT
AREA OUTFALL TO
LAKE WASHINGTON
EXISTING PROJECT
AREA OUTFALL TO
LAKE WASHINGTON
PROPOSED PROJECT
CONNECTION TO EXISTING
DRAINAGE SYSTEM
PROPOSED PROJECT
CONNECTION TO
EXISTING DRAINAGE
SYSTEM
LAKE
WASHINGTON
SE
A
H
A
W
K
S
W
A
Y
SE
A
H
A
W
K
S
W
A
Y
EA
S
T
R
A
I
L
18" SD
18" SD
18" SD
18" SD
18" SD
12" SD
12" SD
12" SD
FIGURE 3: DRAINAGE MAP
1" =
0100 100
100'
50
scale feet
11
/
2
1
/
2
0
2
5
3
:
0
9
P
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:
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:
PD
F
1
7
X
1
1
(L
)
FIGURE 4
SOILS MAP
WATER QUALITY TREATMENT FACILITY
12' X 8' MODULAR WETLAND SYSTEM
WATER QUALITY
TREATMENT BASIN
0.987 ACRES
PERVIOUS SURFACES SUMMARY
SURFACE AREA (ACRES)
LANDSCAPE 0.238
EXISTING LANDSCAPE 0.005
IMPERVIOUS SURFACES SUMMARY
SURFACE AREA (ACRES)
NGPIS ROOF 0.492
NPGIS PAVEMENT 0.187
PGIS PAVEMENT 0.471
EXISTING PGIS PAVEMENT 0.183
FIGURE 5: PROPOSED SURFACE CONDITIONS & WATER QUALITY BASIN
11
/
2
1
/
2
0
2
5
4
:
1
4
P
M
U
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R
:
sl
p
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:
PD
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1
7
X
1
1
(
L
)
0 50
1" = 50'
DESCRIPTION SYMBOL
WATER QUALITY
TREATMENT BASIN
LEGEND
1301 Fifth Avenue, Suite 3200
Seattle, Washington 98101
T: 206 292 1200 www.mka.com
November 2003
APPENDIX A: PLANS
IN COMPLIANCE WITH CITY OF RENTON STANDARDS
VIRGINIA MASON ATHLETIC CENTER
CIVIL CONSTRUCTION PERMIT
VI
R
G
I
N
I
A
M
A
S
O
N
A
T
H
L
E
T
I
C
C
E
N
T
E
R
VI
R
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I
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I
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11
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2
4
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0
2
5
1
0
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5
8
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:
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A
:
C:
AA
A
N
N
N
N
N
N
N
LEGEND AND ABBREVIATIONS
&AND
@ AT
Δ, D DEFLECTION ANGLE
^, DEG DEGREE
~, DIA DIAMETER
#NUMBER
%PERCENT
f'c CONCRETE COMPRESSIVE
STRENGTH
fy REINFORCING STEEL
YIELD STRENGTH
ABAN ABANDON (-ED)
AC ASBESTOS CEMENT,
ASPHALT CONCRETE
AD AREA DRAIN
ADA AMERICANS WITH
DISABILITIES ACT
ADDL ADDITIONAL
ADJ ADJACENT, ADJUST (-ED,
-MENT, -ABLE)
AGGR AGGREGATE
ALT ALTERNATE,
ALTERNATIVE
APPD APPROVED
APPROX APPROXIMATE (-LY)
ARCH ARCHITECT (-URAL)
ASPH ASPHALT
ASSY ASSEMBLY
ASTM AMERICAN SOCIETY FOR
TESTING AND MATERIALS
ATB ASPHALT TREATED BASE
AVE AVENUE
BCR BEGIN CURB RETURN
BFP BACK FLOW PREVENTER
BLDG BUILDING
BLK BLOCK (-ING)
BM BEAM, BENCH MARK
BMP BEST MANAGEMENT
PRACTICE
BOL BOLLARD
BOT BOTTOM
BOW BOTTOM OF WALL
BSMT BASEMENT
BTWN BETWEEN
BVC BEGIN VERTICAL CURVE
CANT CANTILEVER
CB CATCH BASIN
CC CENTER TO CENTER
CDF CONTROLLED
DENSITY FILL
CFS CUBIC FEET PER SECOND
CI CAST IRON
CIP CAST-IN-PLACE
CJ CONSTRUCTION JOINT
CL CENTERLINE
CLR CLEAR (-ANCE)
CMP CORRUGATED METAL PIPE
CNR CORNER
CO CLEAN OUT
COL COLUMN
COMB COMBINATION
COMM COMMUNICATION
CON CONCENTRIC
CONC CONCRETE
COND CONDUIT, CONDITION
CONN CONNECT (-ION)
CONST CONSTRUCTION
CONT CONTINUATION, CONTINUE,
CONTINUOUS
CONTR CONTRACTOR
COORD COORDINATE,
COORDINATION
CORP CORPORATION
CP CONTROL POINT, CENTER
POINT
CTB CEMENT TREATED BASE
CTR CENTER
CU CUBIC
CULV CULVERT
D, Δ DEFLECTION ANGLE
DB DUCTBANK
DEG, ^ DEGREE
DEMO DEMOLISH, DEMOLITION
DEPT DEPARTMENT
DET DETAIL
DI DUCTILE IRON
DIA, ~ DIAMETER
DIAG DIAGONAL
DICA DRILLED-IN CONCRETE
ANCHOR
DIM DIMENSION
DIR DIRECTION
DOM DOMESTIC
DS DOWNSPOUT
DWG DRAWING
DWL DOWEL
DWY DRIVEWAY
(E)EXISTING
E EAST (-ING)
EA EACH
ECC ECCENTRIC
ECR END CURB RETURN
EG EXISTING GRADE
EJ EXPANSION JOINT
EL ELEVATION
ELEC ELECTRICAL
EMBED EMBED (-DED, -MENT)
ENGR ENGINEER
EOR ENGINEER OF RECORD
EQ EQUAL
EQUIP EQUIPMENT
ESMT EASEMENT
EST ESTIMATE (-D)
EVC END VERTICAL CURVE
EW EACH WAY
EXCAV EXCAVATION
EXIST EXISTING
EXP EXPANSION
EXT EXTERIOR
FD FOUNDATION DRAIN,
FOOTING DRAIN
FDC FIRE DEPARTMENT
CONNECTION
FDN FOUNDATION
FF FINISHED FLOOR
FG FINISHED GRADE
FH FIRE HYDRANT
FIN FINISH (-ED)
FL FLOOR, FLOWLINE,
FLANGE
FM FORCE MAIN
FT FOOT, FEET
FTG FOOTING
G GAS, GUTTER
GA GAGE, GAUGE
GAL GALLON
GALV GALVANIZE (-D)
GB GRADE BREAK
GEN GENERAL
GPM GALLONS PER MINUTE
GV GATE VALVE
H HORIZONTAL
HDPE HIGH DENSITY
POLYETHYLENE
HH HANDHOLE
HMA HOT MIX ASPHALT
HORIZ HORIZONTAL
HP HIGH POINT
HT HEIGHT
HTB HORIZONTAL THRUST
BLOCK
HYD HYDRANT
ID INSIDE DIAMETER
IE INVERT ELEVATION
IN INCH
INCL INCLUDE (-D), INCLUDING
INFO INFORMATION
INT INTERIOR, INTERSECTION
INV INVERT
IRR IRRIGATION
JT JOINT
LARCH LANDSCAPE ARCHITECT
(-URAL)
LAT LATERAL
LB POUND
LF LINEAR FEET
LOC LOCATE (-D), LOCATION
LP LOW POINT
LT LEFT
LVL LEVEL
MATL MATERIAL
MAX MAXIMUM
MECH MECHANICAL
MFR MANUFACTURE (-R)
MH MANHOLE
MIC MONUMENT IN CASE
MIN MINIMUM, MINUTE
MISC MISCELLANEOUS
MJ MECHANICAL JOINT
ML MATCHLINE
MON MONUMENT
MSE MECHANICALLY
STABILIZED EARTH
MUTCD MANUAL ON UNIFORM
TRAFFIC CONTROL
DEVICES
N NORTH (-ING)
NA NOT APPLICABLE
NE NORTHEAST
NIC NOT IN CONTRACT
NOM NOMINAL
NTS NOT TO SCALE
NW NORTHWEST
OC ON CENTER
OD OUTSIDE DIAMETER
OPNG OPENING
OPP OPPOSITE (HAND)
OPT OPTION (-AL)
ORIG ORIGINAL
OWS OIL/WATER SEPARATOR
PC POINT OF CURVATURE
PCC POINT OF COMPOUND
CURVATURE, PORTLAND
CEMENT CONCRETE
PED PEDESTRIAN
PERF PERFORATED
PERP PERPENDICULAR
PI POINT OF INTERSECTION
PIV POST INDICATOR VALVE
PL PROPERTY LINE, PLATE
PLUMB PLUMBING
POLY POLYETHYLENE
PRC POINT OF REVERSE
CURVATURE
PROP PROPERTY
PROT PROTECTION
PSF POUNDS PER SQUARE FOOT
PSI POUNDS PER SQUARE INCH
PT POINT OF TANGENCY, POINT
PVC POLYVINYL CHLORIDE
PVI POINT OF VERTICAL
INTERSECTION
PVMT PAVEMENT
Q FLOW RATE
R RADIUS
RCMD RECOMMEND (-ED)
RCP REINFORCED CONCRETE
PIPE
RED REDUCER, REDUCING
REF REFER (-ENCE)
REINF REINFORCE (-D, -MENT),
REINFORCING
REQD REQUIRED
RET RETAINING
REV REVISION
RIM RIM ELEVATION
RJ RESTRAINED JOINT
RL RAIN LEADER
ROW RIGHT-OF-WAY
RPM RAISED PAVEMENT MARKER
RT RIGHT
RW RECYCLED WATER
S SLOPE, SOUTH
SCHED SCHEDULE
SD STORM DRAIN
SDMH STORM DRAIN MANHOLE
SE SOUTHEAST
SECT SECTION
SHT SHEET
SIM SIMILAR
SOG SLAB ON GRADE
SPC SPACE
SPEC SPECIFICATION
SQ SQUARE
SS SANITARY SEWER
SSMH SANITARY SEWER MANHOLE
ST STREET
STA STATION
STD STANDARD
STL STEEL
STRUC STRUCTURAL, STRUCTURE
SW SOUTHWEST
SYM SYMMETRICAL
TB THRUST BLOCK
TC TOP OF CURB
TD TRENCH DRAIN
TEMP TEMPORARY
TESC TEMPORARY EROSION AND
SEDIMENT CONTROL
TOF TOP OF FOOTING
TOW TOP OF WALL
TYP TYPICAL
UNO UNLESS NOTED OTHERWISE
UTIL UTILITY
V VERTICAL
VAC VACUUM
VB VALVE BOX
VC VERTICAL CURVE
VDM VERTICAL DRAINAGE
MATERIAL
VERT VERTICAL
VIF VERIFY IN FIELD
VOL VOLUME
VTB VERTICAL THRUST BLOCK
W WATER, WEST, WIDTH
W/WITH
W/O WITHOUT
WHT WHITE
WP WORK POINT
WPJ WEAKENED PLANE JOINT
WS WATER SURFACE
WT WEIGHT
WWF WELDED WIRE FABRIC
YD YARD
YEL YELLOW
DESCRIPTION SYMBOL DESCRIPTION SYMBOL
LIMITS OF WORK
PROPERTY LINE
EASEMENT LINE
CENTERLINE
CONSTRUCTION ENTRANCE
CATCH BASIN INSERT
SEDIMENT CATCHMENT
AREA
STONE / SAND BAG
ROCK CHECK DAM
STRAW BALE
FILTER FABRIC FENCE
CENTERLINE OF SWALE
TOP OF SLOPE
SLOPE
TOE OF SLOPE
SEDIMENTATION BARRIER
RETAINING WALL
SCREEN WALL
FENCE
FIXED BOLLARD
STRUCTURE
LIMITS OF STRUCTURE
BELOW GRADE
LIMITS OF STRUCTURE
OVERHEAD
GRADE BREAK
MAJOR GRADING
ELEVATION CONTOUR
MINOR GRADING
ELEVATION CONTOUR
PERFORATED STORM DRAIN
STORM DRAIN
AREA DRAIN
CAPPED END
PLUGGED END
CATCH BASIN
CLEANOUT
INLET
MANHOLE
TRENCH DRAIN
SOLIDWALL FOUNDATION DRAIN
PERFORATED FOUNDATION DRAIN
GB
50
49
8" SD
8" SS
8" W
28.00
(28.00)
N 1,433,544.34
E 2,454,789.02
EL = 28.00
SANITARY SEWER LINE
RESTRAINED JOINT
WATER LINE
WATER LINE
AIR RELIEF VALVE
BLOW OFF VALVE
CHECK VALVE
COUPLING
FIRE DEPARTMENT
CONNECTION
FIRE HYDRANT
FITTING
GATE VALVE
HORIZONTAL
THRUST BLOCK
MECHANICAL JOINT
FITTING
POST INDICATOR
VALVE
REDUCER
WATER METER (£ 2")
WATER METER (> 2")
TRENCH/DUCT BANK
COORDINATE POINT
GRADING
SPOT ELEVATION
GRADING EXISTING
SPOT ELEVATION
GRADING SPOT ELEVATION
WITH COORDINATE
BUILDING
BUILDING GRID
DESIGNATIONS
8" SD
2
A
6" FD
N 1,433,544.34
E 2,454,789.02
6" FD
LEGEND
ASPHALT PAVEMENT
CONCRETE SIDEWALK
LIGHT DUTY
CONCRETE PAVEMENT
HEAVY DUTY
CONCRETE PAVEMENT
STONE PAVING
(SEE LARCH)
SITE HATCHES
DESCRIPTION SYMBOL
ITEM TO BE REMOVED
ITEM TO REMAIN
CAP UTILITY,
SEE SITE DEMOLITION
REMOVE EXISTING
ASPHALT PAVEMENT
REMOVE EXISTING
CONCRETE PAVEMENT
DEMOLITION LEGEND
ABBREVIATIONS DRAWING LIST
DRAWING
NUMBER DRAWING TITLE
C001 LEGEND AND ABBREVIATIONS
C002 NOTES
C003 NOTES
C004 CITY OF RENTON NOTES
C005 CITY OF RENTON NOTES
C101 TEMPORARY EROSION AND SEDIMENT CONTROL PLAN
C201 SITE DEMOLITION PLAN
C301 SITE AND PAVING PLAN
C401 GRADING PLAN
C501 STORM DRAINAGE PLAN
C601 UTILITY PLAN
C811 SECTIONS AND DETAILS
C821 SECTIONS AND DETAILS
C831 SECTIONS AND DETAILS
C832 SECTIONS AND DETAILS
SIDEWALK, TYP
STONE PAVING, TYP
SEE LARCH
ASPH CONC PVMT, TYP
BEGIN CONC CURB & GUTTER
MEET & MATCH
EXIST CURB
MEET & MATCH
EXIST CURB
PL, TYP
BOL, TYP
END CONC CURB & GUTTERMEET & MATCH
EXIST CURB
MEET & MATCH
EXIST PVMT
MEET & MATCH
EXIST SIDEWALK
MEET & MATCH
EXIST CURB
STONE SEAT
SEE LARCH
STONE SEAT
SEE LARCH
TREE, TYP
SEE LARCH
CONC CURB, TYP, UNO
MEET & MATCH
EXIST PVMT
MEET & MATCH
EXIST PVMT
FENCE
SEE LARCH
FLUSH CONC CURB
FLUSH CONC CURB
IN COMPLIANCE WITH CITY OF RENTON STANDARDS
VIRGINIA MASON ATHLETIC CENTER
CIVIL CONSTRUCTION PERMIT
VI
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\
D
D
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C
3
0
X
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S
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:
C3
0
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PR
:
LU
A
:
C:
AA
A
N
N
N
N
N
N
N
20 0 20 40
scale feet1" = 20'
10
NOTES:
1.SEE SHEET C001 FOR LEGEND AND ABBREVIATIONS.
2.SEE SHEET C002 FOR GENERAL NOTES.
3.SEE SHEET C002 FOR SITE PAVING NOTES.SITE AND PAVING PLAN
FF = 27.40
FF = (27.40)
PL, TYP
27.21
27.38
26.67
25.43
26.62
26.81
27.38
27.27
27.3827.31
27.38
27.38
26.67 26.79 27.63
27.4426.50
27.89
(32.00)(32.00)
31.00 31.00
30.0030.00
29.0029.00
29.00
28.80
28.30 28.00
28.00
27.3427.38
27.38
27.30
27.38
27.02 27.32
27.4027.10
27.27
27.17
26.81
(30.57)26.56
(30.83)
26.94
(31.14)
27.24
26.92
30.24
30.08
30.19
30.49
30.47
30.67
(32.21)
(32.70)
30.96 32.34
31.57 31.90
32.37
(32.55)
(32.75)
31.97
(32.47)
30.48
(32.01)
30.08
30.00
29.85
(33.29)
27.35
(27.10)
(27.14)(27.35)
27.35
27.38
31.38
TOP OF STAIR 32.10
BOT OF STAIR 30.54
27.31
26.96
27.87
26.48
26.88
27.19
27.19
27.19
TREE TYP,
SEE LARCH
(31.73)
32.05
GB, TY
P
28.50 TW
27.70 BW 31.00 TW
27.30 BW 31.30 TW
27.00 BW
31.60 TW
27.50 BW
31.00 TW
28.50 BW
IN COMPLIANCE WITH CITY OF RENTON STANDARDS
VIRGINIA MASON ATHLETIC CENTER
CIVIL CONSTRUCTION PERMIT
VI
R
G
I
N
I
A
M
A
S
O
N
A
T
H
L
E
T
I
C
C
E
N
T
E
R
VI
R
G
I
N
I
A
M
A
S
O
N
A
T
H
L
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T
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C
C
E
N
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11
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2
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2
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5
9
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A
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d
w
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L
A
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O
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PR
:
LU
A
:
C:
AA
A
N
N
N
N
N
N
N
GRADING PLAN
20 0 20 40
scale feet1" = 20'
10
NOTES:
1.SEE SHEET C001 FOR LEGEND AND ABBREVIATIONS.
2.SEE SHEET C002 FOR GENERAL NOTES.
3.SEE SHEET C002 FOR GRADING NOTES.
PROJECT AREA AND EARTHWORK SUMMARY
NORTH PARCEL (292405-9015) AREA = 16.73 ACRES
AREA WITHIN LIMITS OF WORK = 1.39 ACRES
APPROXIMATE EARTHWORK QUANTITIES:
CUT = 2,230 CY (~ 463.3 TONS)
FILL = 375 CY (~ 77.8 TONS)
EXPORT = 2,230 CY (~ 463.3 TONS)
IMPORT = 375 CY (~ 77.8 TONS)
EXPORT SITE FOR CONTAMINATED SOILS TO BE CONFIRMED WITH CONSTRUCTION PERMIT DOCUMENTS
CB TYPE 2
RIM = 25.43
IE 8" = 22.43
CONN TO EXIST CB TYPE 2
RIM = 27.1 ±
IE 12" = 19.8 ± EXIST
8' X 12' MODULAR WETLAND SYSTEM
RIM = 26.78
IE 12" = 21.49
IE 12" = 20.16
CB TYPE 1
RIM = 26.96
IE 12" = 23.96
CB TYPE 1
RIM = 26.56
IE 12" = 23.54
CONN BLDG ROOF DOWNSPOUT
CB TYPE 1
RIM = 26.88
IE 12" = 21.99
IE 8" = 22.78
IE 6" = 23.88 CB TYPE 2
RIM = 27.87
IE 12" = 22.82
IE 6" = 23.87
92 LF 12" SD
24 LF 8" SD
52 LF 12" SD
166 LF 12" SD
8 LF 12" SD
3
9
L
F
6
"
S
D
CB TYPE 2
RIM = 26.48
IE 12" = 21.53
IE 8" = 21.95
CB TYPE 1
COR STD PLAN 200, TYP
CB TYPE 2
COR STD PLAN 201, TYP
144 LF 12" SD
6 LF 12" SD
12 LF 12" SD
4 LF 12" SD
5" TD
CB TYPE 1
RIM = 26.50
IE 8" = 23.50
FF = 27.40
FF = (27.40)
PL, TYP
5" TD
RIM = 27.31
IE 6" = 25.04
5" TD
RIM = 27.34
CONN BLDG ROOF DOWNSPOUT
CONN BLDG ROOF DOWNSPOUT
18 LF 8" SD 26
L
F
6
"
S
D
5" TD
RIM = 27.34
IE 6" = 25.07
TREE TYP,
SEE LARCH
IN COMPLIANCE WITH CITY OF RENTON STANDARDS
VIRGINIA MASON ATHLETIC CENTER
CIVIL CONSTRUCTION PERMIT
VI
R
G
I
N
I
A
M
A
S
O
N
A
T
H
L
E
T
I
C
C
E
N
T
E
R
VI
R
G
I
N
I
A
M
A
S
O
N
A
T
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L
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T
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C
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T
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11
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2
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2
5
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5
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D
D
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5
0
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S
T
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d
w
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L
A
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O
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T
:
C5
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PR
:
LU
A
:
C:
AA
A
N
N
N
N
N
N
N
STORM DRAINAGE PLAN
20 0 20 40
scale feet1" = 20'
10
NOTES:
1.SEE SHEET C001 FOR LEGEND AND ABBREVIATIONS.
2.SEE SHEET C002 FOR GENERAL NOTES.
3.SEE SHEET C003 FOR STORM DRAINAGE NOTES.
4.SEE SHEET C004 FOR CITY OF RENTON SURFACE WATER STANDARD PLAN NOTES.