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03723 - Technical Information Report
� ! � , � ' J ; � � �C �' 1 � L _ ------ . � " � � �^� -^ �� - � r , �� �a, . , _ . _. ..._.-.--- � i .,ir.w .;*=a t y��;3�`7 �✓ dr :��. `����. CONSULTANTS ' � ` -��y,���7.-+--LK,';,at±W.:�.r .6�'��.q...Tr.' ' 5... �: �j.� . . y� — ,:=�ffii�� 7ianTlf.��v71�l�.S.�'��'L4 • • • • • • • � � � • � � • � I �r.. I I� �, \ f ��. \.. Prepared for: SSHI, LLC. 12910 Totem Lake Blvd. NE, ;. Suite 220 I Kirkland, WA 98034 �- i _ i Prepared by: CPH Consultants . Jamie B. Schroeder, PE 733 Seventh Avenue, Suite 100 Kirkland, WA 98033 ;; February 21, 2014 `. � � 7 � CONSULTANTS ��, . . - • • • • ' - • • . - . . - . _ � � . . . . . , . ...- - - - , `- � ..:_ �._ . .� _ ,, :y �r.; —. . ., .. . . . .. -- � Prepared for: SSHI, LLC. I, 12910 Totem Lake Blvd. NE, I�I Suite 220 _ Kirkland, WA 98034 �� �,��.�. �I g'�l p��':�,a a ` �.� � �. � Prepared by: .� y� �- � ���� � ,., � CPH Consultants .`�. � �,w. Jamie B. Schroeder, PE 37.�� 733 Seventh Avenue, Suite 100 �' ..�-���,�y�� �,�' Kirkland, WA 98033 ,j•� , �....__.. _ , February 21, 2014 t t � �,�i�:� �Y ��. . � , -� �s=�.i� � PH , CONSULTANTS TECHNICAL INFORMATION REPORT FOR �_ LIBERTY GARDENS GTY OF RENTON,WA TABLE OF CONTENTS SECTION 1 -PROJECT OVERVIEW 3 -------•-•-------------------------•-•---••--------•------••---•---•-•----------------•------------------------ FIGURE 1 -VKINITY MAP FIGURE 2-TIR WORKSHEET SECTION 2-CONDITIONS AND REQUIREMENTS SUMMARY 9 , ------------------------------------------------------------------------------- SECTION 3-OFF-SITE ANALY515 1 1 SECTION 4-FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN 1 2 ' ------------------------------------------- SECTION 5-CONVEYANCE SYSTEM ANALYSIS AND DESIGN 1 S ----------------------------------------------------------------------------- $ECTION 6-SPECIAL REPORTS AND STUDIES 1 6 SECTION 7-OTHER PERMIT 1 7 SECTION 8-CSWPPP ANALYSIS AND DESIGN 1 8 I ' SECTION 9-BOND QUANTITIES, FACILITY SUMMARIES,AND DECLARATION OF COVENANT_______________________________21_ SECTION 1 O-OPERATIONS AND MAINTENANCE MANUAL 22 '� FIGURES FIGURE 3-EXISTING SITE CONDITIONS FIGURE 4-SITE PLAN (DEVELOPED CONDITIONS) FIGURE 5-DRAINAGE SUB-BASINS , FIGURE 6-COMBINED DETENTION�WATER C�UALITY POND �� _, APPENDICES ------------------------------------------------------------------------------------------------------------------------------------------- � - APPENDIX A-LAND USE AND KCRTS MODEL INPUT SUMMARY ��� APPENDIX B-KCRTS MODEL RESULTS SUMMARY(FLOW CONTROL� �` APPENDIX C-WETPOOL SIZING CALCULATIONS (- APPENDIX D- CONVEYANCE CALCULATIONS l� f � i ' � I �_.� � Liberty Gardens Technical Information Report SECTION 1 - PROJECT OVERVIEW This Technical Information Report (TIR) is provided to describe the existing stormwater conditions and proposed drainage improvements associated with the Liberty Gardens development project. The project proposes to subdivide and develop two existing properties into 36 individual single-family residential parcels, a storm drainage tract, park, and wetland buffer within the City of Renton. This TIR is provided to identify the applicable storm drainage standards and to summarize the analysis and design provisions proposed for the project to comply with the 2005 King County Surface Water Design Manual (KCSWDM) surface water standards. The Liberty Gardens property is located in an area that was annexed to the City of Renton on August 1 1, 2008 as part of the Liberty Annexation (Ordinance #5398). The project is located between the unimproved Right of Ways of 162^d Ave. SE on the west and 164�h Ave. SE on the east; south of the Cavalla Subdivision. The vicinity map provided below as Figure 1 illustrates the general location of the property. The site is at 162^d Ave. SE 8� SE 140'h Place (KC tax parcel no. 1457500145 8� 14575001 50). More generally, the site is located in a portion of the SE Ya of Section 6 of Township 22 North, Range 5 East,W.M., in King County, Washington (see Vicinity Map below). SE22gIH ST � Y�'�..U-+�- � W � I �r „�� �.; �� g��� y �_�I � ~= ' ;_ W . i -a i �, . �,.�';- Q ; 2 - - =�.1 _�_���.. -�j.ti; t�D �t Q "y� _�..i r_ � �_ SE2NDST�1 Z Sf136THST r ,TT����`-- .� �l�K,�i I.;�,�_.. PROJECT S/TE - -i- ��r 1;_ -�- -� �-������� -` , � � -,--x � �-a ��- �� 1����` s�'s�n�sr '�� ����;� r. �' � .����� ��; ���� _: - , c� -=r���' ' ' �-�--".'��� '� �`'j?�*?,�1, �`�<,' � � w�,w.�-•c-i`=�c--t�'�t�.i��.y\ `�.��. " '` � � —�i'.;'�'�5.. r J-.t��' '�-�� . �:: � � �\ �,�����, r ., . '. y`. . ;��,�S1,L . �y..�: — �r7��iTTr�`_'1��' . " (�r't-j��,1�j •f i nj�i�tJ?�rr �.�`\'_ '_ SiP � �� c �iL' �,� �.. , '�� --- - A��-t�a � � / � , VICINITY MAP NOT TO SCALE Figure 1 — Vicinity Map CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 2 Liberty Gardens Technical Information Report The project site is comprised of 2 parcels; approximately 8.95 acres. No existing structures are currently on the project site. A number of trees of varying type, age, and health condition exist on the site. Figure 3 represent the existing site condition. The proposed subdivision will create a total of 36 single-family residential lots. In addition, the project will include partial frontage improvement of the 162^d Avenue SE right-of-way to provide primary access to the site. Half street frontage improvements will be completed along the 164�h Avenue SE right-of-way to provide secondary access to the site. Both frontages include addition of pavement, curb and gutter, sidewalk, and planter strips. Since the project was started prior to the Liberty Annexation in August 1 1, 2008, King County Municipal Code (KCMC) zoning regulations apply. The site is zoned R-4 which limits impervious area of the individual residential lots to a maximum of 70% for lots less than 9,076sf and 55% for individual lots greater than 9,076sf (KCMC 21 A.1 2.030.B.S.c, Densities and dimensions— Residential Zones). The storm drainage analysis performed for this report considered this maximum coverage. The proposed site plan is shown in Figure 4. The developed site is required to provide Basic Water Quality treatment in addition to Level 3 flow control per current City of Renton surface water standards. The site is in a conservation flow control area however requires Level 3 flow control (City of Renton Environmental Review Committee Report 08-093, December 1 2, 2008) due to flooding problems identified in the Level III Downstream Drainage Analysis prepared by Ed McCarthy, P.E. dated July 2, 2008. Detention storm volumes are proposed with a combined storm detention/water quality pond. Stormwater is proposed to discharge in to the onsite Class III Wetland/Stream complex. Release rates to the Class III Wetland/Stream would be controlled by a three-orifice control riser within the overflow structure. All storm water runoff from the improved site will be collected, controlled, and released to the existing Class III Wetland/Stream in the south west portion of the site. Storm drainage controls for this project are proposed in accordance with City of Renton surface water standards, including the 2005 King County Surface Water Design Manual (KCSWDM). On-site Soil Conditions The soils of the area are characterized generally by the Natural Resource Conservation Services (NCRS) as Alderwood gravelly sandy loam (AgC) with slopes ranging from 6% to 1 5%. CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 3 Liberty Gardens Technical Information Report Figure 2 — Technical lnformation Report (TIRJ Worksheef, 2009 Surface Water Design Manual Part 1 PROJECT OWNER AND Part 2 PROJECT LOCAT[ON AND PROJECT ENGINEER DESCRIPTION Pruject O��ner: SSHI, LLC. Project 1�amc: Liberty Gardens Phone: (425)821-3400 DDES Permit#: Address: 12910 Totem Lake Blvd. NE, Location: To«nship: 2 N Suite 220 ' Kirkland,WA 98034 Range: S E Project Engineer: Jamie Schroeder Section: 6 Phone: (425) 285-2390 Site Address: 162^d Ave.SE & 140"' Place Renton, WA Part 3 TYPE OF PERMIT APPLICATION Part 4 OTHER REVIEWS AND PERMITS ■ Landuse Services ❑ DFV4'HPA ❑ Shoreline Subdivision / Short Subd. I UPD ❑ COE�104 Management ❑ Building Services ❑ DOE Dam Safety ■ Structural WF Commerical / SFR ❑ FEMA Floodplain RockeryNault/ � Clearing and Grading ❑ COE W'etlands ❑ ESA Section 7 ❑ Right-of-Way Use ❑ Other ❑ Other Part 5 PLAN AND REPORT INFORMATION Technical Information Report Site Improvement Plan (Engr. Plans) Type of Drainage Full � Targeted , Type(circle one): Full Modified I Review(circle): Large Site Small Site Date(include revision Date(include revision dates): 611?I2013 dates): 6I12I2013 Date of FinaL 11/8/3 Date of Final: l 1/8/l3 Part 6 ADJUSTMENT APPROVALS Type(circle one): Standard , Comple� , Preapplication l Experimental , Blanlcet Description: (include conditions in TIR Section 2) Date of Approval: CPH Project No. 0035-13-008 February 21, 2014 ' CPIH CONSULTANTS Page 4 Liberty Gardens Technical Information Report Figure 2— Technical lnformaiion Repori (TIR) Worksheet, 2009 Surface Water Design Manual(cont'd.) Part 7 MONITORING REQUIREMENTS h9onitoring Reyuir�d: Y�s i\o Describe: j Start Date: Completion Date: Part 8 SITE COMML'NITY AND DRAINAGE BASIN Community Plan: Residential R-4 Special District Overlays: ' Drainage Basin: Lower Cedar Stormwater Requirements: Conservation Flo�ti�- Level 3 Part 9 ONSITE AND ADJACENT SENSITIVE AREAS ■ Ri�er.-Stream Class 3 ❑ SteepSlope ' � Lake ❑ Erosion Hazard ■ Wetlands Class? ❑ Landslide Hazard � ❑ Closed Depression ■ Coal Mine Hazard ❑ Floodplain ❑ Seismic Hazard ❑ Other ❑ Habitat Protection Part 10 SOILS Sc�il T�pe Slope, E�:rosion Potential AgC 6%- 1 S% Yes ❑ High Ground�vater Table(�vithin 5 feet) ❑ Sole Source Aquifer ❑ Other ❑ Seeps/Springs ❑ Additional Sheets Attached CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page S Liberty Gardens Technical Information Report I� Figure 2— Technical lnformation Report (TIRJ Worksheet, 2009 Surface Wafer Design Manual (cont'd.) � Part 11 DRAINAGE DESIGN LIMITATIONS ' RLFk:RENCE Ll�9ITATfOv;SITE CO��STR:�\I'�"T ��I ❑ Core 2—Offsite Analysis Flooding Problem Identified � ❑ Sensitive/Critical Areas Class 3 stream,Class 2 Wetland ' ❑ SEPA ❑ Other ❑ ❑ Additional Sheets Attached PBrt 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Threshold Discharge Area: Class 3 Stream in southwest portion of site �namc ur d�;cri tionl ' Core Re uirements(a118 a 1�) Dischar e at Natural Location I�umber of Natural Dischar e Locations: 1 Offsite Analysis Le�el: 1 / 2 / 3 Dated: _July?,2008 Flow Control Level: 1 / 2 / 3 or Exemption Number (include a facilih-summan�sheet) Small Site BMP'S: Com-e ance S stem S ill containment located at: Erosion and Sediment Control ESC Site Supervisor: TBA Contact Phone: After Hours Phone: Maintenance and Operation Responsibility: Private / Public � If Private,Maintenance Loe Re uired: Yes �o Financial Guarantees and Liabiliri� Provided: Yes / No Water Qualiry Type: Basic ; Sens. Lake / Enhanced Basic / Bog (include facilin�summary sheet) or Exemption No. Landscape Management Plan: Yes r' No S ecial Re uirements as a licable) Area Specific Drainage Type: CDA i SDO r' MDP ; BP ;' L�IP ! Shared Fac -' None Re uirements I`ame: Floodplain/Flood�vay Delineation Type: Major / Minor / Exemption / None 100-year Base Flood Elevation(or range): Datum: Flood Protection Facilities Description: Source Control Describe landuse: Residential (comm.-industrial landuse) Describe an structural controls: Oil Control High-use Site: Yes / No Treatment BMP: Maintenance Agreement: Yes ! No with whom?: Other Draina e Structures Describe: CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 6 Liberty Gardens Technical Information Report Figure 2 — Technical Informafion Report (TfR) Worksheet, 2009 Surface Waier Design Manual (cont'd.) Part 13 EROSION AND SED[MNET CONTROL REQUIREMENTS MIN[MUM ESC REQUIREMENTS M[NIM[JM ESC REQUIREMENTS DURING CONSTRUCTION AFTER CONSTRUCTION � Clearing Limits � Stabilize Expased Surfaces � Cover Measures � Remove and Restore Temporary ESC � Perimeter Protection Facilities � Traffic Area Stabilization � Clean and Remove All Silt and Debris Ensure � Sediment Retention Operation of Permanent Facilities � Surface Water Control � Flag Limits of SAO and open space � Dust Control preservation areas � Construction Sequence ❑ Other Part 14 ST(?RMWATER FACILITY DESCRIPTIONS (Notc:Include Facility Summary and Sketch) Flow Control T e/Descri tion Water Qualitv T e/Descri tion � Detention Pond ❑ Biofiltration ❑ Infiltration � Wetpool 2 cell wetpond ❑ Regional Facility ❑ Media Filtration ❑ Shared Facility ❑ OiI Control , ❑ Small Site BMP's ❑ Spill Control ❑ Other ❑ Small Site BMP's ❑ Other ' I I Part 15 EASEMENTS/TRACTS � Part 16 STRUCTURAL ANALYSIS ❑ Drainage Easement ❑ Cast in Place Vault � ■ Access Easement ■ Retaining Wall ❑ Native Growth Protection Covenant ■ Rockery>4' High ■ Tract � Structural on Steep Slope ❑ Other ❑ Other Part 17 SICNATURE OF PROFESSIONAL ENGINEER I,or a civil engineer under m}�supervision,have visited the site. Actua(site conditions as obsen�ed�rere incorporated inro this worl:sh d the attached technica!Info 'on eport. To the best of my kno���(edge the infonnation provided here is accurate. ' t-t1- z•�� � ed Date ; i CPH Project No. 0035-)3-008 February 21, 2014 CPIH CONSULTANTS Page 7 Liberty Gardens Technical Information Report '� SECTION 2 - CONDITIONS AND REQUIREMENTS SUMMARY Compliance with Project Drainage Requirements The storm drainage and temporary erosion control standards for the project are established by the 2005 King County Surface Water Design Manual (KCSWDM). The project requires Full Drainage Review as it exceeds the impervious threshold for Small Site Review (Type I or Type II) and proposes more than 2,000 square feet of new impervious surface coverage. The KCSWDM specifies eight core and five special requirements that are to be met for this project. Compliance and�or applicability of each of these design standards are summarized below: S WDM Core Requirements 1. Discharge at Natural Lotafion: The project site currently slopes and drains southwesterly to a Class III wetland/stream in the south western po�tion of the site. The stormwater then flows southerly in the stream to a flow control pond before entering the City of Renton stormwater system. 2. Offsite Analysis: Summarized in Section 3 —Offsite Analysis. A full Level III Downstream Drainage Analysis was prepared by Ed McCarthy, P.E. dated July 2, 2008 3. Flow Control: The project requires conservation flow control according to the KCSWDM Flow Control Map; however, a severe flooding problem was identified in the Level III Downstream Drainage Analysis prepared by Ed McCarthy, P.E. dated luly 2, 2008 which prompts Level 3 flow control. A description of the proposed flow control facilities for the project is provided in Section 4. 4. Conveyance System: The project proposes to collect on-site runoff and convey it to a proposed onsite combined water quality�detention pond then releasing to the onsite Class III wetland/stream. These improvements are shown in Figure 4 and described further in Section 5. 5. Erosion and Sediment Control: Temporary controls are as described in Section 8. 6. Maintenance and Operations: The on-site storm drainage facilities are proposed to be publicly maintained by the City of Renton. 7. Financial Guarantees and Liability: A Bond Quantity Worksheet will be prepared for this project with the final TIR and engineering package. 8. Woter Quality: Basic Water Quality treatment is required for the proposed project. This treatment level is proposed to achieve by means of a combined water quality/detention pond as shown in Figure 6 and as described in Section 4. KS WDM Special Requirements 1. Other Adopted Area-Specific Requirements: No area-specific requirements apply to this project site. 2. Flood Hazard Area Delineation: The limits of this project are not located within or in proximity to a 100-year floodplain. 3. Flood Protection Facilities: Not applicable. CPH Project No. 0035-13-008 February 21, 2014 C��IH �ONSULTANTS Page 8 Liberty Gardens Technical Information Report 4. Source Control: No additional source control is proposed. 5. Oil Control: The project is not considered a high-use area and no special oil control provisions are required. CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 9 � -. I l �� ����� � �' �� - Liberty Gardens Technical Information Report �' � SECTION 3 - OFF-SITE ANALYSIS I �-�� ��� ��-�� ProjeN Storm Drainage Conditions �' Storm water from the developed site will be treated and released at a controlled rate to downstream systems �' �, by means of a treatment pond facility. The outfall for this pond discharges onsite and upstream of a Class III I', ; stream�Class II wetland in the southwest portion of the site. Flows from this wetland�stream complex drain southerly toward SE 144'h Street to a flow control facility. Flooding issues in the vicinity of SE 144rh Street li � were identified during the preliminary subdivision process. A detailed Level III Downstream Drainage Analysis I �- was performed by Ed McCarthy, PE (July 2, 2008� to evaluate the source and recommended remedy for developments within the basin. The conclusion relative for this project as accepted by the City and Hearing Examiner through the preliminary plat process was that Level 3 flow control of storm water from the II � developed site would not exacerbate flooding conditions downstream. I � i � �� ��� I �-- �'- ,. � �' �� �� CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 10 Liberty Gardens Technical Information Report ( , c - SECTION 4 - FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN , The hydrologic analysis of the runoff conditions for this project is based on drainage characteristics such as basin area, soil type, and land use (i.e., pervious vs. impervious) in accordance with King County Surface �, Water Design Manual (KCSWDM) standards. The King County Runoff Time Series (KCRTS) software was used ' to evaluate the stormwater runoff conditions for the project site and to design the on-site flow control facilities. � The following is a summary of the results of the analysis and the proposed drainage facility improvements for , �- this project. Existing Site Hydrology , � The existing conditions of the site are shown in Figure 3. The King County Runoff Time Series (KCRTS) software j was used to model the site hydrology and calculate runoff peak flow rates. Historic site conditions (i.e., fully II forested) were considered in the analysis of the pre-developed site to establish allowable target release I I' � rates for the developed project in accordance with KCSWDM standards for Level 3 Flow Control. The '� existing land used in the KCRTS model analysis are summarized in Table 4.1 � Table 4.1 — Land Use Cover, Pre-Developed Site Conditions Undeveloped Land Cover of Area to be Developed (Acres) Total Area Area (Acres) downstream of p Till Grass Im ervious Till Forest facility (Acres) 9.572 1.076 0.00 8.496 0.00 Input parameters for this model are provided in Appendix A of this report. The model results are provided in Appendix B. Developed Site Hydrology The site is planned to be improved with roadway, storm drainage, and utility infrastructure in support of 36 new single-family residences. Frontage improvements are also proposed in accordance with City of Renton road standards within the currently unimproved portions of 162^d Avenue SE and 164"' Avenue SE rights-of- way. The new SE 140'h Street and 163'd Avenue SE will provide access and connectivity through the site in accordance with the City's current standards and street grid system. A storm tract and onsite recreation area are included with the proposed site improvements per King County Code (KCC) 21 A.14.1 80, on-site recreation —space required. The southwestern portion of the site containing a Class III stream�Class II wetland and an associated 50 foot buffer area will remain undeveloped in a protected open space tract. The developed site was modeled as a single drainage subbasin in the model with approximately 0.461 acres of that area bypassing the onsite pond facility. The developed conditions of the site were modeled using KCRTS to complete a Level 3 - conservation flow control analysis of the project. All roads, building roof drains, on-site paved surfaces and landscape areas except for 0.461 acres of bypass on the site are collected and directed to the on-site combined detention and water quality pond. The southwestern portion of the site containing a Class III wetland�stream and associated buffer will remain undeveloped and therefore not be collected and routed to the onsite storm system to maintain pre-developed conditions. Fully developed conditions were modeled using measured and land cover standards established by the King County Code zoning standards (KCC 21 A.1 2.030, Densities and dimensions— Residenfial Zones). King County CPH Project No. 0035-13-008 February 21, 2014 CPI H CONSULTANTS Page 1 1 Liberty Gardens Technical Information Report Code 21 A.12.030.B35.c states individual lots in the R-4 through R-6 zones less than 9,076 sf in area shall be subject to the nearest comparable R-6 or R-8 zone.All lots, except for Lot 33, meet this threshold for being less than 9,076 square feet. As such, the nearest applicable KCC zone for the project is the R-6 which allows for a maximum impervious coverage of 70%. The remaining 30% of these lots was modeled as landscaped till soil. This maximum impervious coverage was used as a basis for in the KCRTS model and pond sizing analysis. Lot 33 was included in that analysis as 55% impervious and 45% till landscape in accordance with t KCC standard for the R-4 zoning. The impervious and pervious areas for all new roads, sidewalks, planter strips, storm tract, and recreation tract were calculated directly by assuming new roads and sidewalks as impervious and all other developed areas as till landscape. These calculations are shown in Appendix A. The developed land use conditions displayed in Table 4.2 were used as the developed site conditions for the KCRTS model. table 4.2— Land Use Cover, Developed Conditions Total Area Undeveloped Land Cover of Area to be Developed (Acres) (Acres) Area Not Till Grass Modeled (Acres) �mpervious Till Forest 9.572 1.076 6.333 0.00 2.622 The results of the developed site runoff analysis are summarized in Table 4.3 and more detailed results are provided in Appendix B. Bypass Analysis Limited areas of the onsite park/recreation area and the southerly most improved portion cannot be collected and conveyed to the onsite pond facility due to topography. As such, these areas were considered as bypass in the hydrologic model. KCSWDM 1.2.3.2.E(2) requires that surface water runoff from bypass area have no more than a 0.4 cfs increase in the 100-year peak rate between existing and development conditions for those areas. Tables 4.3 and 4.4 summarize the land use conditions used to model and confirm compliance of this bypass condition. Table 4.5 shows the results of the bypass analysis The existing and developed land use conditions for the bypass areas are shown below in table 4.3 and 4.4 Table 4.3 —Land Use Cover, Existing Conditions—Bypass Area Total Area �and Cover of Area to be Developed (Acres) (Acres) �mpervious Till Forest Till Grass 0.461 0.023 0.438 0.00 Table 4.4 —Land Use Cover, Developed Conditions— Bypass Area Total Area �and Cover of Area to be Developed (Acres} (Acres) �mpervious Till Forest Till Grass 0.461 0.051 0.00 0.410 I Table 4.5— 100 Year Peaks, Bypass Area �i Existing Conditions (cfs) Developed Conditions (cfs) 0.044 0.1 1 1 CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 1 2 Liberty Gardens Technical Information Report Fiow Control The onsite storm pond is a combined water quality and flow control (i.e., detention) facility. Peak flows discharged from this facility are released at a controlled rate in accordance with KCSWDM Level 3 ' standards. A standard three orifice flow control riser is proposed for the outlet control structure to achieve conformance with the Level 3 release to downstream systems. The size and number of control orifices on this riser have been designed to control the on-site release rate to historic site conditions for 2-year, 10-year, and 100-year storm events as well as matching developed durations to pre-developed durations for 50% of the 2-year event up to the full 50-year peak flow. Table 4.6 shows the pre-developed and post-developed peak flows for the 2-year, 10-year, and 100-year storm events. ', 7able 4.6 — Peak Flow Summary ' Peak Flows at Point of Compliance (cfs) I Condition 2-year 10-year 100-year Pre 0.236 0.412 0.685 Post 0.172 0.404 0.553 I The full KCRTS results are shown in Appendix B. A summary of the resulting detention volumes can be found in I Table 4J below. I I Table 4.7— Detention Volumes � Minimum Detention Volume Design Detention (cf) Volume (cf) 1 15,400 120,390 Flow Control BMPs Individua) lot BMP's are required for new development resulting in 2,OOOsf or greater of impervious area per applicable KCSWDM standards. These BMP's must be implemented to mitigate an area equal to 10% of each lot. For Liberty Gardens, feasibility of full dispersion, full infiltration, and impervious area reduction were evaluated. Due to topography above 15% in the southern portion of the site, full dispersion was ruled out as an option as a flow path of 200ft with a slope less than 15% could not be achieved. Full infiltration was not feasible on the site due to till soils with low conductivity being found on the site. As a result Liberty Gardens will utilize a 10% reduction in impervious area beyond the maximum allowed impervious per zoning. All lots consisting of less than 9,076sf of area will be required to limit impervious area to less than 60% of the total lot area where as lots larger than 9,076sf will be required to limit impervious area to 45% of the total lot area. A summary of individual lot BMPs can be found on Figure 46. Water Quality The KCSWDM requires that all proposed projects assess the requirement to provide water quality facilities to treot runoff of pollution-generating impervious surfaces. Storm drainage runoff from pollution generating impervious (PGIS) and pollution generating pervious (PGIS) areas will require Basic Water Quality treatment prior to discharge to the downstream,off-site system. This treatment level is proposed to be achieved by a combined detention�water quality pond located at the southern portion of the project site. CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 13 Liberty Gardens Technical Information Report Basic treatment facilities are required with the developed project site. Permanent wetpool facilities will be combined with the on-site detention facility to achieve the water quality treatment standard. The minimum required wetpool volume is calculated as the runoff volume for the 6-month, 24-hour storm event. This water quality volume was calculated using the equations provided in Section 6.4.1.1 of the KCSWDM. The wetpool calculations are provided in Appendix C which are summarized by Table 4J. Table 4.7 — Water Quality Volumes Minimum Required WQ Design Detenfion Volume (cf) Volume (cf) 24,992 29,046 The results of the final design and sizing are provided in Appendix C of this report. CPH Project No. 0035-l 3-008 February 21, 2014 I'i CPIH CONSULTANTS Page 14 I Liberty Gardens Technical Information Report SECTION 5 - CONVEYANCE SYSTEM ANALYSIS AND DESIGN �i I The project proposes to collect surface water runoff trom developed areas of the site and convey it to an on- i site pond facility. This combined wetpool and flow control (i.e., detention) pond facility provides the necessary i water quality treatment and storage volume in accordance with KCSWDM. The pond ultimately discharges i controlled release rates onsite and upstream of a Class III stream and Class II wetland in the southwest portion of the site. Conveyance analysis for the project was performed in accordance with Chapter 4 of the � KCSWDM which requires that new pipe systems be designed with sufficient capacity to convey and contain at � minimum the 25-year peak flow. This system is designed to contain runoff rates generated by a 100-year I storm event. ! Surface water collection and conveyance for the project is proposed by a combination of surface runoff from graded area, catch basin inlets, and below-grade pipes. An existing 24-inch culvert and swale system along the eastern side of the 162^d Avenue SE right-of-way was constructed with a recent and unrelated project to immediately north of Liberty Gardens. The roadway improvements for Liberty Gardens will remove and replace a portion of this system with a below-grade pipe. The storm drainage conveyance systems and sub- catchment areas used for pipe sizing analysis are illustrated in Figure5. The design flow rates from each sub-catchment area were developed using the Rational Method under developed site conditions. A copy of the Rational Method and backwater calculations are provided in Appendix D of this report. Figure 5 illustrates the drainage sub-basin/sub-catchment areas used in the conveyance and backwater analyses. I CPH Projeci No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 15 - Liberty Gardens Technicai Information Report SECTION 6 - SPECIAL REPORTS AND STUDIES Level III Downstream Drainage Analysis, Ed McCarthy, P.E., July 2, 2008 Geotechnical Report for Liberty Gardens, Terra Associates Inc., February 8, 201 3 Traffic Impact Analysis for Threadgill, Cavalla and Liberty Gardens, Gary Norris, October 2006 �i �. '� I , ( � r ' CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 1 6 Liberty Gardens Technical Information Report SECTION 7 - OTHER PERMIT A Construction Permit will be obtained from the City of Renton for roadway, storm drainage, and sanitary sewer improvements proposed for the infrastructure serving the subdivision. A separate building permit will be required for walls over 4 feet in height. A developer extension agreement will be completed with King County Water District No. 90 for the water supply for the development. The project will also require a General Construction Stormwater Permit from the Washington Department of Ecology to stormwater discharge during construction. � � CPH Project No. 0035-13-008 February 21, 2014 i CPIH CONSULTANTS Page 17 Libert Gardens Technical Information Re ort � Y p SECTION 8 - CSWPPP ANALYSIS AND DESIGN Site specific details and provisions for the temporary erosion and sediment control (ESC) facilities are provided with the improvement plans that accompany this TIR. The proposed facilities have been selected and sized in accordance with the recommendations provided in the KCSWDM standards. In addition to the . site-specific ESC measures,the following general Best Management Practices (BMPs) for sediment control shall � ; also be implemented in accordance with the provisions of the KCSWDM: l. Clearing Limits Construction clearing limits fence or silt fence will be installed by the contractor along the entire project corridor to prevent disturbance of project areas not designated for construction. These � ' fences will be installed prior to clearing and grading activities where appropriate. ' 2. Cover Measures _ Temporary and permanent cover measures will be provided by the contractor to protect �i, ; disturbed areas. Disturbed areas will be seeded and mulched to provide permanent cover �' � measure and to reduce erosion within seven days, if those areas not scheduled for immediate � work. 3. Perimeter Protection The contractor will install silt fences as indicated on the drawings prior to any up slope clearing, grading and trenching activities in order to reduce the transport of sediment offsite. 4. Traffic Area Stabilization Stabilized pads of quarry spalls will be installed by the contractor at all egress points from the project site as required to reduce the amount of sediment transported onto paved roads or other offsite areas by motor vehicles. 5. Sediment Retention Sediment retention will be provided by silt fencing and catch basin inlet protection at the locations and dimensions shown on the project drawings. � 6. Surface Water Control ' �- ' Surface water control will include ditches, temporary culverts, check dams, and/or other inlet and 'I (. outlet protection at the locations and dimensions shown on the drawings. 7. Dust Control Wpter and/or street sweeping equipment will be used by the contractor to control dust emissions during construction operations. 8. Wet Season Requirements If soils are exposed during the period of October 1 to March 31, the contractor will mulch and seed or otherwise cover as much disturbed area as possible by the first week of October, in '�,_ order to provide protective ground cover for the wet season. The contractor will also conform to �` the following wet season special provisions: A. Apply cover measures to disturbed areas that are to remain unworked for more than two days. � B. Protect stockpiles that are to remain unworked for more than 1 2 hours. No area is to be _ left uncovered�denuded longer than 1 2 hours during the winter months. � CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 1 8 Liberty Gardens Technical Information Report I C. Provide onsite stockpiles of cover materials sufficient to cover all disturbed areas. D. Seed all areas that are to be unworked during the wet season by the end of the first week of October. E. Apply mulch to all seeded areas for protection. F. Provide onsite storage of 50 linear feet of silt fence (and the necessary stakes) for every �, acre of disturbed area. Straw bales are to be stockpiled onsite for use in an emergency. , G. Provide construction road and parking lot stabilization areas for all sites. H. Provide additional sediment retention as required by the City of Kirkland Engineer. ',, I. Provide additional surface water controls as required by the City of Kirkland Engineer. , J. Implement construction phasing and more conservative BMPs for construction activity near ', surface waters (to be evaluated). K. Review and maintain TESC measures on a weekly basis and within 24-hours after any runoff-producing event. I 9. Sensitive Areas Restrictions ', The project site includes adjacent wetland and stream along with associated buffers. The �, contractor shall install high visibility fencing along the buffers and any areas to remain undisturbed prior to construction. ', 10. Maintenance Requirements 'i All ESC measures will be maintained and reviewed on a regular basis following the standard � maintenance requirements identified in the project drawings. An ESC supervisor will be designated by the contractor and the name, address and phone number of the ESC supervisor will be given to the City prior to the start of construction. A sign will be posted at the primary , entrance to the project site identifying the ESC supervisor and his�her phone number. The ESC supervisor will inspect the site at least once a month during the dry season, weekly during ' the wet season, and within 24 hours of each runoff-producing storm. A standard ESC maintenance , report will be used as a written record of all maintenance. ' The contractor will be responsible for phasing of erosion and sediment controls during construction I so that they are coordinated with construction activities. The contractor will olso be responsible for ' maintenance of temporary controls during construction, including removal of accumulated sediment, and for the removal of the controls and remaining accumulated sediment at the completion of construction. 1 1. Final Stabilization Prior to obtaining final construction approval,the site shall be stabilized, the structural ESC measures removed and drainage facilities cleaned. To obtain final construction approval, the I following conditions must be met: • All disturbed areas of the site should be vegetated or otherwise permanently stabilized I in accordance with project BMPs. At a minimum, disturbed areas should be seeded and mulched to provide a high likelihood that sufficient cover will develop shortly after final approval. The plans include erosion control notes and specifications for hydro-seeding and mulching disturbed areas. • Structural measures such as silt fences, pipe slope drains, storm drain inlet protection and sediment traps and ponds shall be removed once the proposed improvements are i complete and vegetated areas are stabilized. All permanent surface water facilities shall be cleaned completely and restored to working order prior to removal of ESC facilities. � CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 19 Liberty Gardens Technical Information Report SECTION 9 - BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT IAll required bonds, facility summaries, and covenant will be provided by prior to final approval. � � CPH Project No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 20 Site Improvement Bond Quantity Worksheet Original bond computations prepared by: Name: �wl� G �GGt r DCc,�e✓ Date: �-�2( �2�l� PE Registration Number: 3 rf�Q�D Tel.#: 2 s— �-t�5—2 3 t� Firm Name: �.�� L„o h S�,� �"S ���a v�r �a✓ �c..S Address: `7�j.3 7 ^v¢ /��� IG�r I� ��,T,�,��' y�U 3� Project No: ! ROAD IMPROVEMENTS 8 DRAINAGE FACILITIES FINANCIAL GUARANTEE REQUIREMENTS PERFORMANCE BOND'," PUBLIC ROAD 8 DRAINAGE AMOUNT MAINTENANCE/DEFECT BOND'," Stabilization/Erosion Sediment Control(ESC) (A) $ �� - Existing Right-of-Way Improvements (B) $ �2U, ZS _ Future Public Road Improvements&Drainage Facilities (C) $ (p�/.lX�S;/U - Private Improvements (D) $ �oZZ Da�.�-(1 - ' Construction Bond'Amount (A+B+�+D) = TOTAL (T) $�ZS��ZS.,6- M�mum bond'amount is$1000. �g+C�X Maintenance/Defect Bond'Total 0.20= $ �Z7�Z.5,U-]_ NAME OF PERSON PREPARING BOND'REDUCTION: Date: •NOTE: The word"bond"as used in this document means any finandal guarantee acceptable to the City of Renton. •'NOTE:All priCes InGude labor,equipment,matenals,overhead and profit. Prices are from RS Means data adjusted for the Seattle area or from local sources if not included in the RS Means database. REQUIRED BOND'AMOUNTS ARE SUBJECT TO REVIEW AND MODIFICATION BY RDSD Page 1 of 1 Unit prices updated:2h2/02 Version:4/22/02 REF 8-H BOND QUANTITY WORKSHEET.xIs Report Date: 1/19/2010 Site Improvement Bond Quantity Worksheet Existing Future Publlc Private Quantity Completed Right-of-Way Road Improvements Improvements (Bond Reduct(on)• &Drainage Facilitles Quant. nit nce n t uant. ost uant. ost uant. os Complete Cost GENERALITEMS No. Backfill&Compaction-embankment GI-1 $ 5.62 CY 0.00 0.00 7 O.SZ �,' Z�{ . 0.00 Backfill 8 Compaction-trench GI-2 $ 8.53 CY 0.00 0.00 0.00 0.00 Clear/Remove Brush,by hand GI-3 $ 0.36 SY 0.00 0.00 0.00 0.00 Clearing/Grubbingli'reeRemoval GI-4 $8,876.16 Acre O.00Z,�( Z. Z.� . fi.o2 L/ .N 9-99 0.00 Excavation-bulk GI-5 $ 1.50 CY 0.00 0.00 f�U U D I.UJ0.00 0.00 Excavalion-Trench GI-6 $ 4.06 CY 0.00 0.00 0.00 0.00 Fencing,cedar,6'high GI-7 $ 18.55 LF 0.00 0.00 0.00 0.00 Fencing,chain link,vinyl coated, 'high GI-8 $ 13.44 LF 0.00 0.00 S b S O,y� A-90 0.00 Fencing,chain link,gate,vinyl coated, 2 GI-9 $1,271.81 Each 0.00 0.00 � 2 � e 0.00 Fencing,split rail,3'high GI-1 $ 12.12 LF 0.00 0.00 �j ,Q' p &8A 0.00 Fill 8 compact-common barrow GI-11 $ 22.57 CY 0.00 0.00 0.00 0.00 Fill&compact-gravel base GI-1 $ 25.48 CY 0.00 0.00 0.00 0.00 Fill&compact-screened topsoil GI-1 $ 37.85 CY 0.00 0.00 0.00 0.00 Gabion,12"deep,stone filled mesh GI-1 $ 54.31 SY 0.00 0.00 0.00 0.00 Gabion,18"deep,stone filled mesh GI-1 $ 74.85 SY 0.00 0.00 0.00 0.00 Gabion,36"deep,stone filled mesh GI-1 $ 132.48 SY 0.00 0.00 0.00 0.00 Grading,fine,by hand GI-1 $ 2.02 SY 0.00 0.00 0.00 0.00 Grading,fine,with grader GI-1 $ 0.95 SY 0.00 0.00 0.00 0.00 Monuments,3'long GI-1 $ 135.13 Each 0.00 0.00 0.00 0.00 Sensitive Areas Sign GI-2 $ 2.88 Each 0.00 0.00 0.00 0.00 Sodding,1"deep,sloped ground GI-21 $ 7.46 SY 0.00 0.00 0.00 0.00 Surveying,line&grade GI-2 $ 788.26 Day 0.00 2 �7L,SZ (�:99 / 5]L �Z�96 0.00 Surveying,lot location/lines GI-2 $1,556.64 Acre 0.00 0.00 (o,U2 70,q 9-60 0.00 Traffic control crew(2 flaggers) GI-2 $ 85.18 HR 0.00 0.00 0.00 0.00 Trail,4"chipped wood GI-2 $ 7.59 SY 0.00 0.00 0.00 0.00 Trail.4"crushed clnder GI-2 $ 8.33 SY 0.00 0.00 0.00 0.00 Trail,4"top course GI-2 $ 8.19 SY 0.00 0.00 0.00 0.00 Wall,retaining,concrete GI-2 $ 44.16 SF 0.00 (e 'y 9-gg S Z$� .'I� • 0.00 a ,rocery .4 . • 3 3 /3/2'{�i • • Page 2 of 7 SUBTOTAL 0.00 ��{ �g 2,ZV 9-98- u ,, y��,y��.�so.00 o.00 Unit prices updated: 2/12/02 Version: 4/22/02 REF 8-H BOND QUANTITY WORKSHEET.xIs Report Date: 1/19l2010 Site Improvement Bond Quantity Worksheet Existing FLture Public Private Bond ReducUon• Rlght-of-way Road Improvements Improvements &Drainage Facflitles Quant. n t ce n t uant. ost uant. ost uant. ost Complete Cost ROADIMPROVEMENT No. AC Grinding,4'wide machine<1000sy RI-1 $ 23.00 SY 0.00 0.00 0.00 0.00 AC Grinding,4'wide machine 1000-2000 RI-2 $ 5.75 SY 0.00 0.00 0.00 0.00 AC Grinding,4'wide machine>2000sy RI-3 $ 1.38 SY 0.00 0.00 0.00 0.00 AC RemovaVDisposaURepair RI-4 $ 41.14 SY 0.00 0.00 0.00 0.00 Barricade,type I RI-5 $ 30.03 LF 0.00 0.00 0.00 0.00 Barricade,type III(Permanent) RI-6 $ 45.05 LF 0.00 0.00 0.00 0.00 Curb&Gutter,rolled RI-7 $ 13.27 LF 0.00 0.00 0.00 0.00 Curb&Gutter,vertical RI-8 $ 9.69 LF 0.00 , 3 . 0.00 0.00 Curb and Gutter,demolilion and disposal RI-9 $ 13.58 LF 0.00 0.00 0.00 0.00 Curb,extruded asphalt RI-1 $ 2.44 LF 0.00 0.00 0.00 0.00 Curb,extruded concrete RI-11 $ 2.56 LF 0.00 0.00 0.00 0.00 Sawcut,asphalt,3"depth RI-1 $ 1.85 LF � ,s &69 0.00 0.00 0.00 Sawcut,concrete,per 1"depth RI-1 $ 1.69 LF 0.00 0.00 0.00 0.00 Sealant,asphalt RI-1 $ 0.99 LF 0.00 0.00 0.00 0.00 Shoulder,AC, (see AC road unit price) RI-1 $ - SY 0.00 0.00 0.00 0.00 Shoulder,gravel,4"thick RI-1 $ 7.53 SY 0.00 0.00 0.00 0.00 Sidewalk,4"thick RI-1 $ 30.52 SY 0.00 Z g, (� 0.00 0.00 Sidewalk,4"thick,demolition and dispos RI-1 $ 27.73 SY 0.00 0.00 0.00 0.00 Sidewalk,5"thick RI-1 $ 34.94 SY 0.00 0.00 0.00 0.00 Sidewalk,5"thick,demolition and dispos RI-2 $ 34.65 SY 0.00 0.00 0.00 0.00 Sign,handicap RI-21 $ 85.28 Each 0.00 0.00 0.00 0.00 Striping,per stall RI-2 $ 5.82 Each 0.00 0.00 0.00 0.00 Striping,thermoplastic,(for crosswalk) RI-2 $ 2.38 SF 0.00 0.00 0.00 0.00 tnping,4 re ectonze ine . 5 . . . . Page 3 of 7 SUBTOTAL ')2,s �6�:00 �Zq.G IS�j�e` 0.00 0.00 Unit prices updated:2/12/02 Version:4/22/02 REF 8-H BOND QUANTITY WORKSHEET.xIs Report Date: 1/19/2010 Site Improvement Bond Quantity Worksheet Existing Future Public Private Bond Reduction' Rlght-of-way Road Improvements Improvements 8 Drainage Facilfties Quant. rnt rce nt uant. ost uant. ost uant. ost Complete Cost " - s For KCRS'93,(additional 2.5"base)add:RS-1 $ 3.60 SY 0.00 0.00 0.00 0.00 AC Overlay,1.5"AC RS-2 $ 7.39 SY 0.00 0.00 0.00 0.00 AC Overlay,2"AC RS-3 $ 8.75 SY 0.00 0.00 0.00 0.00 AC Road,2",4"rock,First 2500 SY RS-4 $ 17.24 SY 0.00 Z S /OO,o0 6:68 0.00 0.00 AC Road,2",4"rock,Qty.over 2500SY RS-5 $ 13.36 SY 0.00 � �� �Z 8-89 0.00 0.00 AC Road,3",4"rock,First 2500 SY RS-6 $ 19.69 SY 0.00 0.00 0.00 0.00 AC Road,3",4"rock,Qty.over 2500 SY RS-7 $ 15.81 SY 0.00 0.00 0.00 0.00 AC Road,5",First 2500 SY RS-8 $ 14.57 SY 0.00 0.00 0.00 0.00 AC Road,5",Qty.Over 2500 SY RS-9 $ 13.94 SY 0.00 0.00 0.00 0.00 AC Road,6",First 2500 SY S-1 $ 16.76 SY 0.00 0.00 0.00 0.00 AC Road,6",Qty.Over 2500 SY S-1 $ 16.12 SY 0.00 0.00 0.00 0.00 Asphalt Treated Base,4"thick S-1 $ 9.21 SY 0.00 So � O,Uv 9-A9 0.00 0.00 Gravel Road,4"rock,First 2500 SY S-1 $ 11.41 SY 0.00 0.00 0.00 0.00 Gravel Road,4"rock,Qty.over 2500 SY S-1 $ 7.53 SY 0.00 0.00 0.00 0.00 PCC Road,5",no base,over 2500 SY S-1 $ 21.51 SY 0.00 0.00 0.00 0.00 PCC Road, 6",no base,over 2500 SY S-1 $ 21.87 SY 0.00 0.00 0.00 0.00 ic ene ge , Page 4 of 7 SUBTOTAL 0.00 �yy, 8zl,�Z 9:9�- 0.00 0.00 -� Unit prices updated: 2/12/02 Version:4/22/02 REF 8-H BOND QUANTITY WORKSHEET.xIs Report Date: 1/19/2010 Site Improvement Bond Quantity Worksheet Existing Future Public Private Bond Reduction' Right-of-way Road Improvements Improvements 8 Drafnage Facilities Quant. nit rce nit uant. ost uant. ost uant. ost Complete Cost - For Culvart prices, Average of 4'cover was assumed.Assume perforated PVC is same price as solld pipe. Access Road,R/D D-1 $ 16.74 SY 0.00 � (o A-@9 0.00 0.00 Bollards-fixed D-2 $ 240.74 Each 0.00 0.00 0.00 0.00 Bollards-removable D-3 $ 452.34 Each 0.00 3� 6:69 0.00 0.00 '(CBs include frame and lid) CB Type I D-4 $1,257.64 Each 0.00 Z2, Z (o L (� 4:08 0.00 0.00 CB Type IL D-5 $1,433.59 Each 0.00 Z L 0,88 0.00 0.00 CB Type II,48"diameter D-6 $2,033.57 Each 0.00 I$ v , I � 0.00 0.00 for additional depth over 4' D-7 $ 436.52 FT 0.00 � v S (r 0.00 0.00 i CB Type II,54"diameter D-8 $2,192.54 Each 0.00 Z /q , 4�99 0.00 0.00 for additional depth over 4' D-9 $ 486.53 FT 0.00 / 0.00 0.00 CB Type II,60"diameter D-10 $2,351.52 Each 0.00 0.00 0.00 0.00 for additional depth over 4' D-11 $ 536.54 FT 0.00 0.00 0.00 0.00 CB Type II,72"diameter D-12 $3,212.64 Each 0.00 0.00 0.00 0.00 for additional depth over 4' D-13 $ 692.21 FT 0.00 0.00 0.00 0.00 Through-curb Inlet Framework(Add) D-14 $ 366.09 Each 0.00 0.00 0.00 0.00 Cleanout,PVC,4" D-15 $ 130.55 Each 0.00 0.00 0.00 0.00 Cleanout,PVC,6" D-16 $ 174.90 Each 0.00 (� Z U 9�6 0.00 0.00 Cleanout,PVC,8" D-17 $ 224.19 Each 0.00 0.00 0.00 0.00 Culvert,PVC,4" D-18 $ 8.64 LF 0.00 0.00 0.00 0.00 Culvert,PVC,6" D-19 $ 12.60 LF 0.00 3� $ ,po O:A@ 0.00 0.00 Culvert,PVC, 8" D-20 $ 13.33 LF 0.00 0.00 0.00 0.00 Culvert,PVC,12" D-21 $ 21.77 LF 0.00 0.00 0.00 0.00 Culvert,CMP,8" D-22 $ 17.25 LF 0.00 0.00 0.00 0.00 Culvert,CMP,12" D-23 $ 26.45 LF 0.00 r � B:6B 0.00 0.00 Culvert,CMP,15" D-24 $ 32.73 LF 0.00 0.00 0.00 0.00 Culvert,CMP,18" D-25 $ 37.74 LF 0.00 0, 0.00 0.00 Culvert,CMP,24" D-26 $ 53.33 LF 0.00 2� p o Z 9�0 0.00 0.00 Culvert,CMP,30" D-27 $ 71.45 LF 0.00 0.00 0.00 0.00 Culvert.CMP,36" D-28 $ 112.11 LF 0.00 0.00 0.00 0.00 Culvert,CMP,48" D-29 $ 140.83 LF 0.00 0.00 0.00 0.00 Culvert,CMP,60" D-30 $ 235.45 LF 0.00 0.00 0.00 0.00 u vert, - . . .00 Page 5 of 7 SUBTOTAL 0.00 �Pj y,�i���,�.9�- 0.00 0.00 � Unit prices updated:2/12/02 Versian:4/22/02 REF 8-H BOND QUANTITY WORKSHEET.xis Report Date: 1/19/2010 Site Improvement Bond Quantity Worksheet Existing Future Public Private Bond Reductlon' Right-of-way Road Improvements Improvements DRAINAGE CONTINUED &Drainage Facliltles Quant. o. n t nce n t uant. ost uanl. ost uant. ost Complete Cost Culvert,Concrete,8" D-32 21.02 LF 0 Culvert,Concrete,12" D-33 $ 30.05 LF 0 0 0 0 Culvert,Concrete,15" D-34 $ 37.34 LF 0 0 0 0 Culvert,Concrete,18" D-35 $ 44.51 LF 0 0 0 0 Culvert,Concrete,24" D-36 $ 61.07 LF 0 0 0 0 Culvert,Concrete,30" D-37 $ 104.18 LF 0 0 0 0 Culvert,Concrete,36" D-38 $ 137.63 LF 0 0 0 0 Culvert,Concrete,42" D-39 $ 158.42 LF 0 0 0 0 Culvert,Concrete,48" D•40 $ 175.94 LF 0 0 0 0 Culvert,CPP,6" D-41 $ 10.70 LF 0 0 0 0 Culvert,CPP,8" D-42 $ 16.10 LF 0 0 0 0 Culvert,CPP,12" D-43 $ 20.70 LF 0 0 0 0 CulveA,CPP,15" D-44 $ 23.00 LF 0 0 0 0 Culvert,CPP,18" D-45 $ 27.60 LF 0 0 0 0 CulveA,CPP,24" D-46 $ 36.80 LF 0 0 0 0 Culvert,CPP,30" D-47 $ 48.30 LF 0 0 0 0 Culverl,CPP,36" D-48 $ 55.20 LF 0 0 0 0 Ditching D-49 $ 8.08 CY 0 0 0 0 Flow Dispersal Trench (1,436 base+) D-50 $ 25.99 LF �', French Drain (3'depth) D-51 $ 22.60 LF 0 0 0 0 � Geotextile,laid in trench,polypropylene D-52 $ 2.40 SY 0 0 0 0 ' Infiltration pond testing D-53 $ 74.75 HR 0 0 0 0 Mid-tank Access Riser,48"dia, 6'deep D-54 $1,605.40 Each 0 0 0 0 Pond Overflow Spillway D-55 $ 14.01 SY 0 y ,c� 0 0 Restrictor/Oil Separator,12" D-56 $1,045.19 Each 0 0 0 0 Restrictor/Oil Separator,15" D-57 $1,095.56 Each 0 0 0 0 Restrictor/Oil Separator,18" D-58 $1,146.16 Each 0 � /y ,�� 0 0 Riprap,placed D-59 $ 39.08 CY 0 3�Z, !p�( 0 0 Tank End Reducer(36"diameter) D-60 $1,000.50 Each 0 0 0 0 Trash Rack,12" D-61 $ 211.97 Each 0 � � /, � 0 0 Trash Rack,15" D-62 $ 23727 Each 0 0 0 0 Trash Rack,18" D-63 $ 268.89 Each 0 � 2 G , 0 0 ras ac , . a ac Page 6 of 7 SUBTOTAL 0 C� �], $ 0 0 Unit prices updated: 2/12l02 Version:4l22l02 REF 8-H BOND QUANTITY WORKSHEET.xis Report Date: 1l19/2010 Site improvement Bond Quantity Worksheet Existing Fut�re Public Private Bond Reduction' Right-of-way Road Improvements Improvements 8 Drainage Facflitfes Quant. n t nce Un t uant. nce uant. ost uant. ost Complete Cost PARKING LOT SURFACING No. 2"AC,2"top course rock&4"borrow PL-1 $ 15.84 SY 0 0 0 0 2"AC, 1.5" top course&2.5"base cour PL-2 $ 17.24 SY 0 0 0 0 4"select borrow PL-3 $ 4.55 SY 0 0 0 0 1.5"top course rock 8�2.5"base course PL-4 $ 11.41 SY 0 0 0 0 WRITE-IN-ITEMS (Such as detention/water quality vaults.) No. WI-1 Each 0 0.00 0.00 0.00 WI-2 SY 0 0.00 0.00 0.00 WI-3 CY 0 0.00 0.00 0.00 WI-4 LF 0 0.00 0.00 0.00 WI-5 FT 0 0.00 0.00 0.00 WI-6 0 0.00 0.00 0.00 WI-7 0 0.00 0.00 0.00 WI-8 0 0.00 0.00 0.00 WI-9 0 0.00 0.00 0.00 wi-io • • SUBTOTAL 0.00 0.00 0.00 0.00 SUBTOTAL(SUM ALL PAGES): �I Z,S 9-68� �f�����J.q Z 9��' Lf7l���I�ol,��p:A6- 0.00 30%CONTINGENCY 8 MOBILIZATION: 27�7S (�90� ��UU/,�� g;g�- /y�,�,S6B-A0" 0.00 GRANDTOTAL: �20.2� (�&9-- (a 37 D(Js,�D.g�g- (pZZ��X�,Lf�g:g�' 0.00 COLUMN: B C D E Page 7 of 7 Unit prices updated: 2112/02 Version:4/22/02 REF 8-H BOND QUANTITY WORKSHEET.xIs Report Date: 1/19/2010 Liberty Gardens Technical Information Report SECTION 10 - OPERATIONS AND MAINTENANCE MANUAL The on-site storm drainage facilities for this project will be publicly maintained by the City of Renton. The facility has been designed in accordance with KCSWDM and a specific Operations and Maintenance Manual should not be required. CPH Projecf No. 0035-13-008 February 21, 2014 CPIH CONSULTANTS Page 21 PH CONSULTANTS FIGURES Site Planning Civil Engineering Project Management lond Development Cansullinq >3513oa A PORTION OF THE SE 1/4 OF SECTION 6 TOWNSHIP 22 N, RANGE 5 E, W.M. T"�CN COR 351308 �,�AR�s o �i - � _ ,�:_ �r t � I SURVEY DATA � , � `` � ; -=;� -;;-t`3,�\ � `` � i � U , �� � � �� /,* t? � -- ` 2-�-- , {I -� \A - EXISANG BOUNDARY, TOPOGRAPHIC, AND PLANIMETRIC INFORMAAON SHONfJ ON 7HIS PLAN AND O7HERS IN THIS ��" �� G7VALUPIA7 � �� � �J .' �� T SET WERE USED AS A BASIS FOR DESIGN AND REPRESEN7 FIELD SURVEY OATA AND MAPPING PREPARED BY �1-� ,:�r -._ _ � , < � J '_._,'s�'ee g .�l' � -= � �-- . _. S88'IHJ7'E 5 H � _ _ ,-y I �_JOB NO. �, AS PRObIDED BY 7HE PROJECT OWNER, AND DOES NOT REPRESENT WORK BY CP l� ------- - '' � " ' � � �! � ONSUL7ANT5. 7HE FOLLON1NG SURVEY DATA WAS PROVIDED WiTH 1HE TOPOGRAPHlC MAP BY� ~' � .. 94.05' - . . .. . . ,_ _ .. - . . >'� � � . �-�, � � � -- _ `- - — . .� ~ � . . •, ',2 � .- � . - _ -- . NAVD 98B PER CTY OF R F� VERT/CAC DATUM; � " ,. . ^`.. --- �------ ENTIXV SURVEY CONTROL NETMtlRK - -- 4 , . . � _.. --+ --- `��. / � _ �� I � �. � � '._ - �'�_ -- . . . ` � � -- _ x ; BENCHMARN: � o '�, -& - -- ' � �, � �_ `� �\ , '\ �� •. �`. HRASS DISK 1N CONCRETE MONVMENT!N hlE lNTERSECTION OF S.E 142N0 PLACE AND 75fiTH A VE. SE EL=408.64 ( ' , ' . ` � '•. �4o i : � � �� � _ � p� � � ` ' \ � ''' � MERfOIAN: � c,' ���... I ` �� /; `- �` \ \�-i , \ ���\ \\� \ �� \ � 1,. HPGN 93/91 PER KINC C N � �•. � W TY SURYEY CON7ROL \ = w - - � � � �� i� % �. � - � � �� � � - BAS/S OF BEAR/NGS: � _ � � : ' �, I g� � �� '� -' �`�\ �, � � � TNE 5. LN. OF THE SE 1/4. SEC. 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FE - -- � - -�,�.� _-� ,�m�a . . -,.,. ..�, �. , >;. , _,. ; :FP= ,;-� s �^T^'351308 A PORTION OF THE SE 1/4 OF SECTION 6 TOWNSNIP 22 N, RANGE 5 E, W.M. LEGEND 53513P8 w )351308 'n'35130& � PAD ELEYATIpJ .M �135130b Q 10 LOT NUNBfR ��;sisos V ^""351308 w DAYlJpIT UNE tM AREAS J � EX15T. GROUND CON70UR . - � . - � . . .. .', — __— FlNISHm GRADE CONTOUR � _� b , �i�. . . . � .. .. � - . --� . I 'l � SURFACE fiOW/CRADE -;� ?j.CR�� ` /�r�'�r-, \ �t.--i �� �,1 . __- :�. 4� .. -� . `- � TOE 416 4� TOP/TdE ELEV.A7 FlNfSH CRADE OF WALL � LOL7C AND LOAD WALL � ' { , (s�ueuK onr sH�r ca.ioz) � w I f� � - + APPROXIMATE EARTNWORK OUANIITIES r� .. - � � 'I' �1� GYEARING AREA: 4.46 AC a � i i 1 2 3 4 5 6 7 8 9 10 lj W , CUI 20.054 cr (� . . y FlLL: i7,052 CY � ., �p I� >�: . _� � � � -- —� .._ -- Z � — � � �' W , �� .... -� �,� .._— _ . _� —._ '�-- - ; Q w . : ; . .._ ' , - .. . �' _ m Z I } � . ` ` : J 1� -- - �-- - — '} --r-� - - �-- - *-- r��-_, ''� ;"� I � i a — �! �. � •� �' -------�_ � --*t- 'Z i' �'l_•-_-tr+-�� s . , , ..�, . , , . -.�.+. ;- , . , . , � i N - . ,, , . _ ... , _ a , — - . � - -- 5 -_ — --- -- , � __. —_ ,� _ � I ` ' ." ---- �r ., � , ._ .� + � ...... -- ( 30 21 �I . 4 _ -_ � v 36 35 � � �� �4 ' I - - — — — I (. • I 22 � r +_ .. _ . — ',, 29 ' 13 � I 32 � _ '- DEVELOPEDAREA I. ` I . - � IM�n 5.1 AC - ' � 33 vFR6IB�,s�z.szs rnEs n23 w+.ss 'I 14 - rn . 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ZQE 44Q - ..,'-- .(2.3 i0£450:9 �, �_ LOCK AND LOAD WALL � � . _ _ _ (s��rak av sri�r ca.�oz) Z W � . � ` � TGP 4J1.0 � A � ' =4 1. A =4 . � PA =4 . PA - 7. =�g.3 �� � ��.. TOE 4 0.� 7.3) APPROXIMAIE EARTHWORK OUANA7IES � ��TOE 430.0 '� 2 3 4 . 5 PA =4 . A =N.4 A =M7. � � � . _ Q B 7 8 g jQ }Bp� CLEARING ARfA: 4.46 AC � �r � . 7 4 z� � , tWA�� T 4• J.8) FlLL: 170,052 CYY / ',, �! i - � roE aso roP 4s4s s� � ZJ = roE aso.� <._ � � . - - -- - - -- - -- - --- --= 2 TM 452.0 1.3) w �`� • �,. ¢ '`�TO 450J LOT 8MP TABLE . (j] e�.�' _ I '-`�-�--- <r �'��. . , � .-�. .-,._: �� '� � �►� � _ .�'. LO7 TOTAL AREA (SF) MAX IMPERNOUS AREA (SF). .. � , �----- - -! ----__�.. -- .. . ., `'r. ,- .. .., . . .: ��. �.� .. , ;. � '�---�- -- -- - . _._ _ '. �_ F -�� 1. T 6070 3642 � �_,,�,q p . _ . - - - � 4 --� --;-�� - - �-a�� .. ��TOE�42' 8.0 , .. �yF . I ` Z 5001 3001 ---- . ��. � 3 5001 3001 � -. - . - - �- �5 ... . 4 5001 3007 .. =4� . PA0=43.4 q =q • .� � � .��� � � PROPERTY 5 5001 300( 30 PA �' - - BOUNOARY(7YP.) 6 5007 3001 36 35 34 a =a z. p 12 ili � sooi soor PA =4 1. A = 43.G I � � .. -4 .4 �� - �O .- 8 6002 3601 ���� � TOP 430.2 5.41 A =42. . � . 9 5001 3001 TOE 424.8 f0 5501 3301 . - - qp_4 4- I ,., � 22 _ . � I �x PAD-942. '� TOP 429. 4A� �� , i� 13 �`. TOP 447.5 4.9J 11 6055 36J3 425. TOE 436.6 .. ....�� PA =4 � ', Q =441. . 72 5847 3508 � . 3Z TOP 424.8 4.6) P =4 4. � _�� ,.. � 1J 5500 3300 � . . TOE 410.2 23 - - ._ OP 43.5 4.9) ' 14 5500 3300 ! . 33 � 28 �� �: � ro 433.6 i � �.�� # PA0=424.3 � T�420.9 4.5 �I � 14 I 'OP 4 .6 4.9) 15 5000 3000 � -• =4 L � - � i 'OE 431.7 . - � � , � AD=421:0 - PA =4 .1 ; 16 5607 J364 � .3Z � TOE 4 2 0.3 2.9) A -4 . . e ; _ 24 ° - :�� � TOE�g,s a.3� � 77 58t4 3488 . . .. . .. Q] . � . � � . 78 5534 3320 � . � PA �i . � TOP 420. 46 � _., . _ .f � u �...... . TOE 47 . ' � .. � 1 Jr �' 'TOP 437J 4.7 19 6000 3600 � � ' � � . ' ' ¢ A =431. � � TOE 427A � 20 7748 4649 I �. 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FIGURE 5-SUB-BASINiCATCHMENT AREAS FIG. 5 ��� � __ �_�-._ , . o_.�- _ - � -'- ,�E- ,� s ' ��K_�R A PORTION OF THE SE 1/4 OF SECTION 14 TOWNSHIP 23 N,RANGE 5 E, W.M. �T^'351308 ��.5351308 W �)351308 \\ � - y _ �4 � . rM... _ , . , ! ( �1351308 Q , �i+�� c-- � ', ROW o� \ � ,.'��7�... ��� � � OEIENIION/WE7PqJD VOLUMES . `3513D8 (� , . . . . � 16 'i MINIMUM REQUIRED DE1FN710N VOLUMf 'l J �'\ .- ' -. . . �� - � ,,"� �CB30 �', � �� DON VOLUAI ( PROWDED(CF) AS-BUILT VOLUNE(CF) , ,.\ �.., -, -� �`.. ; _ ,, ,—ce3io ce:oo � �, � ��. �\ �, � � , .� � E �� � ',. � ' � �`. = - -� -_._ � -� � y,`:._ �\� .; ( 108�020 72Q390 ��` ` ��� � 16 RD AVENUE SE . � � � ��\ � .�,� ;,, �� � \ ----- - � —� � %� MIN/MUM REOUIREO WAIER WALJ7Y . `, _.i __- - -- - ---- . _ .. _ . . ---- - - --,n -- - T - . . . ' WATER WAUTY NJLUME AS-BU/L7 VOLUME(CF) , \ � � _. - I__ 17 vo�uMe(cF) PR041DED(Cf) , _ -, _ �� __ _ �\ s � _ _ _- _ -- - ___ - —— \ � 24,992 29,046 i . � � \ --r�� --C6105 � ' ��, r . z z � iw � � .:. ROW :i'!f-- � �._� � �•, i.�� ��. � � \ _ � - r f� LOCKlNC MANHOLE COVER AND FRAAIE I � � , �' PER GOR S7D. DEL 204.5 a Q --_ _- . -- , .. :��\ 9?Ix3i GRATEO OPENINC. 1/2� �RIM R. = 4�3.5 �'i �r . � �.. •�.\ '�, . DIAAI. VERL BAR AT 4'O.C. _. - I H RECREATION �-1 ��' . `` \ � � , .—— � —� z o�N RrsEw Er,� . w ��\ TRACT ��C3.21 � i� r � .. \ � (�20-� I � � ,. � 18"DIAM. FLOW S7RUCNRE OI�ERAOW=417J5 ^� "-_ ',.'��2 �. TOP RISfR=411J5 POND ACCfSS ROAO PER � � - � � >^:�' � �� ASSEMBLY PER COR S7D. .. m �` OETAIL QN SHEET C3.21 .-�i-� ��' � � ; r =??? � OWG. 27Z000 .. 4'ELBOW W 2.00 DIAM. ORIRCE lE=409J0 . J \ - .�"i''�'- f � � � u - 4"ELBOW W 2.40 DIAM. ORfFlCE 1£=408.80 � ' � :�� . - �� �--( `. � POL Y STEPS Q4 LADOER. -.- I *� (�� _ � � } BOLT TO CATCH BASIN WALL \� � � , .. -��_, � ' _ _ _ �� F _ ,:� �1 � ��� ��i '� �'� �� � YB• . . FlNISH GRADE _. � . A_ A, a , � . .� _ ,_. �_ � _�.f 1 ' •'401,pp , i ' ' �., � - "� � , , :: � .3' � � rROM YYETPOND TO CB300 ; � . �,�, � , i �.� = , -- ..� �-,:,-r= - - - , IE=105.00 ,�� % �� ` �� ��E�4� �.. �� . .t . - .,�, _ _ - -f- _ £LEY I - 1. - � , , �` _� �� -, F , I M `� ��-s� -- - � - I �, ` � '. Ij i I i ` . �9 / 410 :. \, ' I _ 12'DlAM. SHEAR GA7E - EL-403.00 / ' � , f � � �`,, � I 19 '.. W�UFT R00 PER COR - � , \� 25LF 24"SD `" � � I I =p?. �.. S)U. OWG. 237.J0 _ � i , CS02�� . - � � . -� - `�'�•P..1 .r`,-.. I . ,.,. I � ,',,. CS Of f � N �� �; �` - I � i TYPE 2-54'OIAM. �- . I ' 2� �� � � � . CA 7CH BASIN . � � -_ , . _, � � , �I � . 1.42"OVAM. ORIFlCE ' � i ' �, "� � � OS I � �- REMOVABLf PIPE SECIION � iE(24�w)=aoz.so rz'Pavo acc�ss � � r � �-"' STORM TRACT I — � _ � A � � � DE7ENAON/WEIPOND pETAIL DN � � w�SOLID END PLATE .. ,C3.27- � `�;i� I I -�. WQ ELEV.=405.0 SHEET C3.21 ' I I I � �_. " CS 01-FLOW CONTROL STRUCTURE ti" ' s{ -'� ' aor. e�v=4ozo ' ; i C , , �� { ,� ,.: , � , �) �' 3�� � _ C32Q;NOT TO SCALf -- � ���',, , /�� DfBRIS CACE PER , � COR STU. PLAN 234.20 \ � �� ( ���\ � 2� � , w � � . / ( ' \� �' � \� . OVERFLOW ELEV.=411J5 . . . ,.,- ��. � 41 �' .-� � . ( � "- �' IE(24NE)=402.00 �'...- 412 � � .. — . � � . ,(�� �, '� _ . . — . - ---T -- . . - - -.- - � �--- -- �. ,� .. `C`. "��\0 � .��.. �. ..".' .'BERAf Elf1L'4f2�S -.�.� .�� . .-� BOL7 70 CATCH BAS1N WALL ____. � � '� AOLY STEPS OR LADDER, • Y � -- `- -- - -- --- - -- -- -= �� - - - - _ _ 12 � � -- --- � ' � ROCK OUTFALL EMERGENCY OI�ERFLOW -- ---_---�--- � .. � .-- __ ---- __--- RNISH GRADE --------- "--- ... 12'OEPTH RIPRAP SPoLLWAY PER DETAfL " ..I - � - -- ON SHffT C3.21 - � .---"" - . .. . . . O FLOW 70 OU7FAll 1f=404J4 ' . � �.. ., �.,_. 1 ,^ -_.._ -..., ... . _ . --: ':�,.: .. . �` � � ... ,__.- � CS 02 FROM CS 07� , , , . .: _-� , � TYPE 2-4H"DIAM. � - � - - °_..T , �y-- � �._ . �' I �1, ' �� }- � ��� .__ CATCH BA9N n r � � � ���.� � � � r.� , , - , �..._ � .�;-_'�.'.---�,'----' .��� ,. .---��---�. ;, : �- � � �'. ''. � - � ;�E , CS 02-EMERGENCY OVERFLOW STRUCTURE � �'�'201 NOT TO SCALE g SC �`� � iz _.F`-_� CP � � ..�.��_�:� _� CONSULTANTS � S�le Marming•Ci�I Ei��ee�re CALL BEFORE Iir9�_se Corw Gr,q•PrCjM:ll3nager?n� YOUDIG �,r�,y�xlaol���c.x�+w�:.3.t 7a00.4245555 �arx-wni:resz3hl���oa�z�.�� -on<o+s�i�anr,� � .. . �.� �� ', CITY OF RE\TO\ 1 CiT/ OF RENTON SUBMITfAL JBS 10 30/13 JBS '""`''@ ���.�� LIBERTY GARDENS Y Y� 8/30/13 wY� a�F�„�an�: t�at��: � � �'=20' d3 ,� CITY OF iV� � 'nMie a. scHriomex, pe � P�OADWAY GRADING.DRAINAGE ANC SANITARY SEWER IMPROVEMENTS -'�- ,.�,,�,,,��h,: �,t�: °"�P� �,�5 RENTON C �=C 40 .,�� "��`. �`.`. o� �� DATUM Plannin Bu�ldin Public Works De t. '�C3.'ZQ nMiE a.scHRoma�,ae e� e� P STORM WATER POND DETAILS p��_An iv=EE" _ ,, , . .. .., ;1 �ruced hc: Dat,: N0. REVISION BY DATE APPR �P�p f°"'�'n' 19 �40 A - NNNNAA �;�. .��F A PORTlON OF THE SE 1/4 OF SECTION 14 TOWNSHIP 23 N, RANGE 5 E, W.M. w 0 O U W ' J I � II 6'MIN. �� 12�AIIN. �. FINISHfO GRADE AT BERAI TOP BERM. EL£V.�412.00 k.PX. � � 2 5=2.OT MAX. �1' Z w --- p MAX W.S ELEV.=41I.75 --- 1 A/AX. �4qX � ___ ___ "_ __' "' w � 3 ACCESS ROAD 3 � p Q �� DE7ENTION STORACE 1� 3'MIN. Ys'HMA � a UNDlSTURBfD NAT1Y£ 6'MIN. DEP7H CRUSNED SURFAClNG WQ EC£V.=405.00 � �r .__ "_ __' � __r-3.__ ___ ___ "'— OR SUI7ABLE COMPACT BASE CWRSE I � POND BIM. E(fV=402.00 DEAD STWtAGE 70P SE0.=462.00�� -�-�-�- � IMPOR7 SOIL AIAIERIALS I � POND BTM. ELEV.=401.00 . � L1.� m -' � DETENTION/WETPOND SECTION ,p, POND ACCESS ROAD ; A `� �c3.zo� �.C3.20'NOT TO SCALE .., / NOT TO SCALE T M SPI W Y E. E0. EMERCENCY Ob£RFLOW � F D 'MIN. WATER SURFAC£QEU. 2' � TOP PONO(BERMJ n EMERCENCY , � O E p 01�ERFLOW N5 ELEV. o E ; B — = - — — — EMER(�NCY SPlLLWAY CRE57 ELE✓. n — � ACCE55 ROAD FlNISH CRADE AT BERM N � "� r —+ 12�7YP.— l.� II J ' --- U W 2 =� t 3 i�A OMPA�CTED DIYPE I � —L_ _ "' NAK W.S. ELEV.=411J5 p ___ 3 � � 1 _ ���(\ f � ' �"P�� ;�F`�, SECTION �� -- W.Q. ELEV.=405.00-- o -- --- -- �� o ,��� ��� OND B11N.ELEV.=40200 W � '`� 8�MINUS WARRY SPALLS � � _.....���--.-. .�_r'�� _ AT SPILLWAY AND ��__.__ _ ,%�' . .�.,�i-� OYERftOW CRE57 �'�-- � � �� � SWLLWAY �LLWAY OYERROW TOP POND SPILLWAY SPILLWAY ---�----- -� CREST ELEV. W.S ELEV. BERM LENGTH fT SIDE SLOPE � � � � � EMERGENCY 472.05 � 417.25 472J5 6.0' 3:1 -g DETENTION/WETPOND SECTlON ;'E,�EMERGENCY(SECONDARY) OVERFLOW SPILLWAY DETAIL �C3.20 •.C3.20-NOT TO SCALE � .� NO7 TO SCALE -- g JC � �� ` i �� 2_ �� ��� . C P :�_;; ��' .,T��F,_ � S'��l%'.11.� � CONSULTANTS � Sne Poain r3�G�:�I E�yreen� CALL BlFOR! �ao-i Use Consenr,g•P�oject hlara3e!r^^t YOU OIG 1-800-4245555 '�"�"`"`e.xre_x mm,we;aca '��e 125:�1'l�C�FAi�d2:i:4S:i?9 CI'1'Y OF RF.\TOti 1 Cf1Y OF RENTON SUBMITfAL JBS 10 30 13 JBS "'� N�A �w:o'I� � CI TY OF LIBERTY GARDENS � 8/30/73 �. �\fp'n`rJ h.: U�tr- iE B.SCMROEDER.P RCADWA�GRADING.DRAINAGE AND SANITARV SEWER IMPROVEM17ENTS "P1< I �... -� RENTON � :\pproczd h.: D:'.�: ���µs DATUM �� �� P�a��i�g/B�i�eing/Pub�ic works Dept. STORM DRAINAGE POND PLAN AND DETAILS C3.21 '\r�r���ed b�-: I):'.�:: IE B. SCHROEDER.PE r xm a[ro� � . � :\ .ro�eJho. U.ur. N0. REV'�SION BY CArE APPR �RovED ���¢Y 20 40 A - NNNNAA P � CONSULTANTS APPENDIX A LAND USE AND KCRTS MODEL INPUT SUMMARY Site Planning Civil Engineering ," Project Management � Land Development Consulting �. LIBERTY GARDENS Site Plan RAW DATA COLLECTED AREA Area(ft) Area(ac) BYPA55 AREA Area(ft) Area(ac) LOTS 1-36 207392 4.761 STORM TRACT A 36920 0.848 PARK 17843 0.410 ONSITE ROAD 80720 1.853 OFFSITE ROW 2228 0.051 ROW IMPROVEMENTS 24962 0.573 TOTAL COLLEc 20071 0.461 TOTALCOLLECTED 349994 8.035 AREAS FOR BYPASS AREA 0.4CFS CONDITION Pre-Developed Developed Lot Forest(ac) Landscape(ac) Impervious(ac) Total(ac) Lot Forest(ac) Landscape(ac) Impervious(ac) Total(ac) PARK 0.386 0.000 0.023 0.410 PARK 0.000 0.410 0.000 0.410 OFF5ITE ROW 164TH 0.051 0.000 0.000 0.051 OFFSITE ROW 164TH 0.000 0.000 0.051 0.051 Total 0.438 0.000 0.023 0.461 Total 0.000 0.430 0.051 0.461 AREAS FOR SITE MODELING Pre-Developed Developed(Collected) Lot Forest(ac) Landscape(ac) Impervious(ac) Total(ac) Lot Forest(ac) Landscape(ac) Impervious(ac) Total(ac) LOTS 1-36 4.761 0.000 0.000 4.761 LOTS 1-36 0.000 1.428 3.333 4.761 STORM TRACT A 0.848 0.000 0.000 0.848 STORM TRACT A 0.000 0.293 0.555 0.848 ONSITE ROAD 1.853 0.000 0.000 1.853 ONSITE ROAD 0.000 0.371 1.482 1.853 ROW IMPROVEMENTS 0.573 0.000 0.000 0.573 ROW IMPROVEMENTS 0.000 0.120 0.453 0.573 PARK 0.410 0.000 0.000 0.410 Total 0.000 2.212 5.823 8.035 OFFSITE ROW 164TH 0.051 0.000 0.000 0.051 Total 8.496 0.000 0.000 8.496 Developed(BypassJ Lot Forest(ac) Landscape(ac) Impervious(ac) Total(ac) PARK 0.000 0.410 0.000 0.410 Notes: OFFSITE ROW 164TH 0.000 0.000 0.051 0.051 1.Areas gathered from file,P:\project\0035\13008\Dwg\Work\STORM AREAS.dwg Total 0.000 0.410 0.051 0.461 2. Impervious lot areas assumed to be 70%of the lot areas per King County Municipal Code Vault Summary Length(ft) Width(ft) Active Storage(ft) Volume(cf) Scenario 1 135.75 100 6.3 115400 CP�H Consultants , October 31, 201 3 CPH Project No.: 0035-13-008 1 of 1 PH CONSULTANTS APPENDIX B KCRTS MODEL RESULTS — FLOW CONTROL Site Planning Civil Engineering Project Management Land Development(onsulting , Liberiy Gardens Technical Information Report City of Renton Appendix B-Page 1 of 8 Detention Sizing - Retention/Detention Facility Type of Facility: Detention Pond Side Slope: 3. 00 H: 1V Pond Bottom Length: 135.75 ft Pond Bottom Width: 100. 00 ft Pond Bottom Area: 13575. sq. ft Top Area at 1 ft. FB: 25722. sq. ft 0. 591 acres Effective Storage Depth: 6.25 ft Stage 0 Elevation: 405. 00 ft Storage Volume: i15400. cu. ft 2. 649 ac-ft Riser Head: 6.25 ft Riser Diameter: �8. 00 inches Number of orifices: 3 Full I�ead Pipe Orifice # Height Diameter Discharge Diameter (ft) (in) (CFS) (in) 1 0 . 00 1. 42 0. 137 2 3 . 83 2 .38 0.238 6. 0 3 4 . 63 = . 90 0. 125 4 . 0 Top Notch Weir: �one Outflow Rating Curve: None I Stage Elevation Storage Discharge Percolation Surf Area (ft) (ft) (cu. ft) (ac-ft) (cfs) (cfs) (sq. ft) � 0.00 405. 00 0. 0. 000 0. 000 0. 00 135�5 . 0. 01 405. 01 136. 0. 003 0. 007 0 . 00 1358� . 0. 03 405. 03 408. 0. 009 0. 009 0 . 00 13617 . 0. 04 405. 04 544. 0. 012 0. 012 0 . 00 13632 . 0. 06 405. 06 817. 0. 019 0. 013 0 . 00 13660. 0. 07 405. 07 954. 0. 022 0. 015 0 . 00 13674 . ' 0. 09 405. 09 1228. 0. 028 0.016 0.00 13703. 0. 10 405. 10 1365. 0. 031 0.018 0.00 13717 . 0 . 12 405. 12 1639. 0. 038 0.019 0.00 13745. 0 . 13 405. 13 1777. 0. 041 0.020 0.00 13759. 0 .26 405.26 3578. O. Q82 0. 028 0. 00 13945. 0 .38 405. 38 5261. 0. 121 0. 034 0. 00 14118 . 0.50 405. 50 6966. 0. 160 0. 039 0. 00 14291 . , 0. 62 405. 62 8691. 0 .200 0. 043 0. 00 14466. � 0.75 405.75 10584. 0 .243 0. 047 0. 00 14656. I 0. 87 405.87 12353. 0 .284 0. 051 Q. 00 14833. 0. 99 405. 99 14144. 0. 325 0. 055 0. 00 15011 . _ . 11 406. 11 15956. 0.366 0. 058 0. 00 15189. = .24 406.24 17943. 0.412 0. 061 0. 00 15384 . 1 .36 406. 36 19800. 0. 455 0. 064 0. 00 15565. 1 .48 406. 48 21679. 0. 498 0.067 0. 00 1574? . 1 . 6a 406. 60 23580. �. 5�1 0. 069 0 . 00 ,-593� . CPH Project No. 0035-13-008 October 31,2013 CP�H CONSULTANTS Active Storage Liberfy Gardens Technical Information Report City of Renton Appendix 8-Page 2 of 8 1 . �3 406.73 25664. 0. 589 0. 072 0. 00 16130. 1 . 85 406. 85 27610. 0. 634 0. 075 0. 00 16315. 1 . 97 406. 97 29579. 0. 6�9 0.077 0. 00 16501 . 2 . 09 407. 09 31571 . 0.725 0.079 0.00 16689. 2 .22 4�7 .22 33753. 0.7`75 0. 082 0. 00 16893. 2 . 34 407 .34 35792. 0. 822 0. 084 0. 00 17082 . 2.46 407 .46 37853. 0. 869 0.086 0. 00 17273. 2 .58 407 . 58 39937 . 0. 917 0.088 0. 00 17464 . 2 .71 407. 71 42221. 0. 969 0.090 0.00 17673. 2 . 83 407. 83 44354 . 1. 018 0. 092 0. 00 17866. 2 . 95 407 . 95 46509. 1. 068 0. 094 0. 00 18061. 3. 07 408 . 07 48688. 1. 118 0.096 0. 00 18257 . 3.20 408 . 20 51075. 1 . 173 0.098 0. 00 18470. 3.32 408 . 32 53304 . 1 .224 0.100 0. 00 18668. 3. 44 408. 44 55556. 1.275 0. 102 0.00 18867 . 3. 56 408.56 57832 . 1.328 0. 104 0. 00 19067 . 3. 69 408 . 69 60325. 1. 385 0. 105 0. 00 19285. 'i 3. 81 408 . 81 62651. 1. 438 0. 107 0. 00 19487 . 3. 83 408 . 83 63041 . 1 . 447 0. 107 0. 00 19521. � 3. 85 408. 85 63432 . 1. 456 0. 109 0. 00 19554 . � 3. 87 408. 87 63823. 1.465 0. 114 0.00 1958� . I 3. 90 408 . 90 64412. 1.4�9 0. 121 0. 00 19639. I 3. 92 408 . 92 64805. 1. 488 0. 131 0. 00 19673. 3. 95 408 . 95 65396. 1. 501 0.144 0. 00 1972� . 3. 97 408 . 97 65791 . 1. 510 0. 159 0. 00 19758 . 4 . 00 409. 00 66384 . 1.524 0. 173 0.00 1980^ . 4 . 02 409. 02 66781. 1.533 0. 178 0. 00 1984� . 4 . 05 409. 05 67377 . 1. 547 0. 183 0. 00 1989� . 4 . 17 409. 17 69776. 1 . 602 0.202 0. 00 2009'^ 4 .29 409.29 72200. 1. 657 0.218 0.00 203Gr,. 4 . 42 409. 42 74855. 1. 718 0.233 0. 00 2053� . 4 .54 409. 54 77331 . 1 . 775 0.246 0. 00 20739. 4 . 63 409. 63 79205. 1 . 818 0.255 0. 00 20895. 4 . 65 409. 65 79623. 1 . 828 0.258 0.00 20931 . 4 . 67 409. 67 80042 . 1 . 838 0.262 0. 00 20965. 4 . 69 409 . 69 80461. 1. 847 0.268 0. 00 210G1 . 4 .71 409. 71 80882. 1. 857 0.275 0.00 21036. 4 .73 409.73 81303. 1 . 866 0.283 0. 00 21071 . 4 . 75 409.75 81725. 1 . 876 0.293 0. 00 2110h, 4 . 77 409. 77 82147 . 1 . 886 0.303 0. 00 21141 . 4 . 79 409. 79 82570. 1. 896 0.309 0. 00 211?5. 4 . 81 409. 81 82994 . 1. 905 0.313 0. 00 21212 . 4 . 93 409. 93 85552. 1. 964 0.336 0. 00 21�2? . 5 .05 410.05 88136. 2 . 023 0.357 0. 00 21636. 5 . 18 410. 18 90964 . 2 . 088 0.375 0.00 21868 . 5. 30 410 . 30 93601. 2 . 149 0. 392 0.00 220R? . 5. 42 410 . 42 96264 . 2 .2�0 0.408 0. 00 2229'�. 5 .54 410. 54 98953. 2.272 0.423 0. 00 22515, 5 . 67 410. 67 101895. 2. 339 0.438 0.00 22753 . 5 .79 410.79 104638. 2. 402 0.452 0.00 229?2 . 5 . 91 410. 91 107408. 2. 466 0. 465 0. 00 23192 . 0. 03 411 . 03 110205. 2 . 530 0.478 0. 00 2341? . 6. 16 411 . 16 113264 . 2 . 600 0.491 0. 00 23654 . CPH Project No.0035-13-008 October 31, 201 3 CP�H CONSULTANTS Active $torage Liberfy Gardens Technical Information Reporf I City of Renton Appendix B-Page 3 of 8 �, 5. 25 411.25 115400. 2 . 649 0.500 0. 00 23822 . �, 6. 35 411. 35 117792. 2 .704 0. 972 0. 00 24009. ' 6.45 411. 45 120202. 2 .759 1 . 830 0. 00 24196. � 6.55 411.55 122631. 2 .815 2 . 930 0. 00 24384 . �, 6. 65 411. 65 125079. 2 . 871 4 . 230 0. 00 24573. '' 6.75 411.75 127546. 2. 928 5 . 710 0. 00 24763. 0. 85 411. 85 130032. 2. 985 7 . 150 0. 00 24954 . e. 95 411. 95 13253i. 3. 043 7 . 680 0. 00 25145. , 7 . 05 412 . 05 135061. 3. 101 8. 180 0. 00 25337 . � 7 . 15 412 . 15 13`1609. 3.159 8. 650 0. 00 25529. i .25 412 .25 140167. 3.218 9. 100 0. 00 25722 . � . 35 412 .35 142748. 3.277 9. 520 0.00 25916. ? . 45 412.45 145350. 3. 337 9. 930 0.00 26111 . 7 . 55 412. 55 147971. 3. 397 10.320 0. 00 26307 . 7 . 65 412 . 65 150611. 3. 458 10. 690 0. 00 26503. 7 . 75 412 . 75 153271. 3. 519 11 . 050 0. 00 26700. � .85 412 . 85 15595�i. 3.580 11 . 400 0. 00 26897 . � . 95 412 . 95 15865,�. 3. 642 11.740 0. 00 27096. 8. 05 413.05 161370. 3.705 12 . 070 0.00 27295. 8. 15 413. 15 164110. 3.767 12 . 390 0. 00 27494 . 3,✓d Ir.flow Outflow Peak Storage Stage Elev (Cu-Ft) (Ac-Ft) = 3.22 0. 60 6.27 411 .27 115895. 2. 661 2 1. 61 0.45 �.77 410. 77 10412? . 2 .390 3 1. 63 0.39 �.26 410.26 92719. 2 . 129 4 1. 93 0.38 5.22 410.22 91758 . 2 . 106 � 1.71 0.24 4.46 409. 46 75726. 1 .738 5 1 . 02 0. 16 3. 97 408 . 97 6581? . 1 .511 1 .34 0. 11 3. 81 408 . 81 62743. 1 .440 _ 1 .49 0. 09 2.83 407 . 83 4436? . 1. 0�9 � H1✓d R/D Facility Tributary Reservoir POC Outflow Outflow Inflow Inflow Target Calc i 0. 60 0. 11 ******** 0 . 69 0. 63 2 0 . 45 0. 05 ******** ******* 0. 48 3 0. 39 0. 05 ******** ******* 0. 41 . 0. 38 0. 06 ******** ******* 0. 40 5 0.24 0. 05 ******** ******* 0.26 5 0. 16 0. 03 ******** ******* 0. 17 0. 11 0. 03 ******** ******* 0. 12 � �I . J�' �J. .,� f+tx � �tt rx<�r,r*� :J . �,`) ---------------------------------- Ron�e T_r.e Series throa�r Facility Inflow Time Series File:dev.tsf C�.�flow Time Series File:rdout POC Time Series File:dsout =r_tlow/Outflow Analysis Peak Inflow Discharge: 3.22 CFS at 6: 00 on Jan 9 in Year 8 ?eak Outflow Discharge: 0. 597 CFS at 12 : 00 on Jan 9 in Year 8 Peak Reservoir Stage: 6.2? F� CPH Project No.0035-13-008 October 31, 2013 CP�H CONSULTANTS Active Storage Liberfy Gardens Technical Information Report City of Renton Appendix B-Page 4 of 8 Peak Reservoir �le���: 411.27 Ft P=ak R�s�r��oir Stora�e : 115895. C�.-Ft . 2 . 551 ��-Ft %=dd Ti:ne Series :bypassdev.�st Peak Summed Discharge: � . 5�, �� .. at _� . ���� ��-� �ar � i-� "reu� . Po_nt of Compliance File:dsout.tsz Flow Duration from Time Series File:raout.tsf ��utoff Count Frequency CDF Exceedence Probu�ilit� CFS ° ° ° - o a � C . 007 28766 46. 911 46. 911 53.089 0. 531E+00 0 . 019 6511 10. 618 57 . 529 42.471 0. 425E+00 0 . 032 5835 9. 516 67 . 045 32. 955 0.330E+00 0 . 045 5524 9. 008 76. 053 23. 947 0.239E+C0 0 . 058 4576 7 . 462 83.516 16.484 0. 165E+OG C . 071 4264 6. 954 90.470 9.530 0. 953E-C1 0 . 084 2143 3.495 93 . 964 6.036 0. 604E-C1 0 . 097 1858 3. 030 96. 994 3.006 0.301E-C1 0 . 110 1355 2 .210 99.204 0.796 0.796E-C2 0 . 123 65 0. 106 99. 310 0.690 0. 690E-02 C . 136 30 0. 049 99.359 0.641 0. 641E-02 _ . "'�49 25 0. 041 99. 400 0.600 0. 600E-02 0 . "�62 19 0. 031 99. 431 0.569 0.569E-02 0 . '75 18 0. 029 99. 460 0.540 0. 540E-02 O . �gg 44 0. 072 99.532 0.468 0. 468E-02 �% . 201 44 0. 072 99. 604 0.396 0. 396E-02 �� .213 40 0. 065 99. 669 0.331 0. 331E-02 �i . 226 33 0. 054 99.723 0.277 0.277E-02 �� . 239 40 0. 065 99.788 0.212 0.212E-02 C� .252 22 0. 036 99. 824 0. 176 0. 176E-02 �� .265 10 0. 016 99. 840 0. 160 0. 160E-02 �� .278 4 0. 007 99.847 0. 153 0. 153E-02 �� . 291 7 0. 011 99. 858 0. 142 0. 142E-02 � . 304 3 0. 005 99. 863 0. 137 0. 137E-02 �� . 317 6 0. 010 99. 873 0. 127 0. 127E-02 0 . 330 8 0. 013 99.886 0. 114 0. 114E-02 �. 343 6 0. 010 99. 896 0. 104 0. 104E-02 �. 356 7 0. 011 99. 907 0.093 0 . 930E-G.� ��. 369 9 0. 015 99. 922 0. 078 0 . 783E-03 �. 382 17 0. 028 99. 949 0.051 0. 506E-G3 �. 395 11 0. 018 99. 967 0.033 0. 326E-C3 �. 407 3 0. 005 99. 972 0.028 0.277E-C3 �. 420 3 0. 005 99. 977 0.023 0.228E-CS �. 433 4 0 . 007 99. 984 0.016 0 . 163E-C� �. �46 4 0 . 007 99. 990 0.010 0. 978E-0� �. 459 4 0. 007 99. 997 0.003 0. 326E-04 F1ow Duration from Time Series File:dsout.tsf Cutoff Count Frequency CDF Exceedence Probabili`y CFS ° ° ° o a a 0. 007 28813 46. 988 46. 988 �3.012 0. 530E+OC 0. 021 6922 11 .288 5� . 2?6 �1 .?24 0. 41?�+OC CPH Project No.0035-13-008 October 31, 2013 CP�H CONSULTANTS Active Storage Liberfy Gardens Technical Information Report City of Renton Appendix B -Page 5 of 8 0. 035 5995 9.7i7 68. 053 31 . 947 0. 319E+00 0. 048 5623 9. 170 77 .223 22.777 0.228E+00 0. 062 4504 7.345 84 . 568 15. 432 0. 154E+00 0. 076 3998 6.520 91. 088 8 . 912 0. 891E-0� 0. 090 2096 3.418 94 . 506 5. 494 0. 549E-0"� 0. 104 1705 2 .780 97.286 2 . `114 0.271E-0� i ` 0. 117 1084 1 .768 99.054 0 . 946 0. 946E-02 i `.� 0. 131 147 0.240 99.294 0.706 0. 706E-0� j 0. 145 41 0.067 99.361 0. 639 0. 639E-02 - 0. 159 25 0.041 99.401 0. 598 0. 598E-02 0. 172 20 0. 033 99.434 0. 566 0. 566E-02 0. 186 21 0. 034 99.468 0. 532 0. 532E-02 0.200 48 0. 078 99.547 0. 453 0. 453E-02 0.214 40 0. 065 99. 612 0. 388 0. 388E-02 0.228 41 0. 067 99. 679 0. 321 0. 321E-02 0.241 26 0. 042 99.721 0.279 0.279E-02 0.255 36 0. 059 99.780 0.220 0.220E-02 0.269 27 0. 044 99.824 0. 176 0. 176E-02 0.283 9 0.015 99. 839 0. 161 0. 161E-02 0.297 5 0.008 99. 847 0. 153 0. 153E-02 0. 310 7 0.011 99. 858 0. 142 0. 142E-02 � �' 0 . 324 4 0. 007 99. 865 0 . 135 0. 135E-02 � 0 . 338 8 0. 013 99. 878 0 . 122 0. 122E-02 0 . 352 5 0. 008 99. 886 0 . 114 0. 114E-02 II 0 . 366 7 0.011 99. 897 0 . 103 0. 103E-02 i ',, 0.379 8 0.013 99. 910 0.090 0. 897E-C3 i 0.393 10 0.016 99. 927 0.073 0.734E-03 ' 0. 407 17 0. 028 99. 954 0. 046 0. 457E-03 0.421 9 0. 015 99. 969 0. 031 0.310E-03 , 0.434 2 0. 003 99. 972 0. 028 0.277E-03 0. 448 3 0. 005 99. 977 0. 023 0.228E-03 0. 462 3 0. 005 99. 982 0. 018 0. 179E-03 0. 476 5 0.008 99. 990 0. 010 0. 978E-04 0. 490 4 0.007 9°. 99� � . 0�3 0. 326E-0� Duration Comparison Anayls_s Base File: pre.ts� New File: dsout.tsf Cutoff Ur.its: Discharg� in CFS Duration Comparison -----Fraction ot Time --�I�ec;c of io_erar.ce----- Cutoff Base New %Change Probability Base New �Cnanae 0. 117 I 0 . 95E-02 0. 93E-02 -1.7 � 0. 95E-02 0. 117 0. 117 -C. 3 0. 150 I 0. 63E-02 0. 62E-02 -1. 0 � 0. 63E-02 0. 150 0. 148 -l . G 0. 182 I O. SOE-02 0. 55E-02 10.2 � 0.50E-02 0. 182 0. 194 6. ? 0.214 I 0.37E-02 0. 39E-02 4 . 8 I 0. 37E-02 0.214 0.217 1 . 5 0.246 � 0.29E-02 0.26E-02 -8. 0 � 0.29E-02 0.246 0.239 -2 . ? 0.278 I 0.22E-02 0.16E-02 -25. 7 I 0.22E-02 0.278 0. 255 -8 . 4 0. 310 I 0. 15E-02 0. 14E-02 -5.4 � 0. 15E-02 0. 310 0 . 303 -2 . 3 0. 342 � O. 10E-02 0. 12E-02 17 . 5 I O. 10E-02 0. 342 0 . 367 7 . 3 0. 375 I 0. 62E-03 0. 95E-03 52 . 6 � 0. 62E-03 0. 375 0.399 6. � 0. 407 � 0. 34E-03 0.4cE-�� 33. 3 � 0. 34E-�3 0. 4�? 0. 417 2 . � CPH Project No.0035-13-008 October 31, 201 3 CP�H CONSULTANTS Acfive Sforage Liberfy Gardens Technical Information Report City of Renton Appendix B-Page 6 of 8 ��. 439 I 0.21r�-03 0 .26E-03 23. 1 I 0.21E-03 C. 439 0.456 3. 9 �. 471 � 0. 16E-03 0 . 13E-03 -20. 0 I 0. 16E-03 0. 471 0.463 -1.7 �. 503 I 0. 11E-03 O. 00E+00 -100. 0 I 0. 11E-03 0. 503 0. 474 -5.8 �. 535 I 0. 16E-04 O. 00E+00 -100. 0 I 0. 16E-04 0.535 0. 490 -8 . 3 I••1ax�r�,um positive excursion = 0. 017 cfs ( 10. 00) occurring at 0. 169 cfs on the Base Data:pre.�sf and at 0. 185 cfs on the New Data:dsout.tsf Maximum negative excursion = 0. 029 cfs ( -9. 8%) cccurrina at 0.297 cfs on the Base Data:pre.�sf �nd at 0.2F8 cfs on the New Data:dsout.tsf �=ow Frequency Analysis '�-_..� Seri�s File:rdout.tsf Fr�;,�ct Location:Sea-Tac ---rnnual Peak Flow Rates--- -----Flow Frequency Analysis------- F-c:�r Rate Rank Time of Peak - - Peaks - - Rank Return Prob (�FS) (CFS) (ft) Period �I C . 460 2 2/09/Ol 20: 00 0.597 6.27 1 100.00 0. 990 � . 107 7 1/07/02 4 : 00 0.460 5. 87 2 25. 00 0. 960 ' � . 381 4 3/06/03 22 : 00 0.386 5.26 3 10 . 00 0. 900 � � . 092 8 8/26/04 7 : 00 0. 381 5.22 4 5. 00 0. 800 � . 160 6 1/08/05 3: 00 0.238 4 . 46 5 3. 00 0. 66� � .238 5 1/19/06 0:00 0. 160 3. 97 6 2. 00 0.500 � . 386 3 11/24/06 8: 00 0. 107 3. 81 7 1 .30 0.23= � . 59� ' 1/�9/08 12 : 00 0.092 2 . 83 � 1 . 10 �. 09_ �o�p�at�d F�uks �i.��� � .�5 5�., . G,. � . 9�_�0 ---------------------------------- K.osre i'r�,e �eries Lrrough Faci=_t•LL� Inflow Time Series File:dev.ts- �-s�tl�vr Time Series File:rdo�st P�� Time Series File:dsoat I-:flow/Outflow Analysis Peak Inflow Discharge: 3.22 CFS at 6:00 on Jan 9 in Year � P�ak Outflow Discharge: 0.597 CFS a� 12 : C�� o-: Jan � -r '��ar ��+ �eak Reservoir Stage: 6.27 Ft Peak Reservoir Elev: 411.27 Ft ?eak �.�s�r-�-o-r Storage : 115895. Cu-=� . 2 . 551 Ac-_� Add Time Series:bypassdev.�sf Peak SuTnmed Discharge: . . ��- �-., �.� -� . ��� o� �an , -r _ear _ =�.^irt of ��mpl_�r.�e =ile: �soL�. tsf CPH Project No.0035-13-008 October 31, 2013 CP�H CONSULTANTS Active $torage II Liberiy Gardens Technical Information Report City of Renton Appendix B-Page 7 of 8 � ,- I . Peak Flow Rates F1ow Fr�auerc-�� F.nai✓sis Time Series File:dsoat.csf Project Location:Sea-Tac �, ---Annual Peak Flow Rates-- -----Flo��; �re�uan�y �rallsis------- F1ow Rate Rank Time of Peak - - Peaks - - Rar.k Return Proti (CFS) (CFS) Period 0. 491 2 2/09/Ol 20:C0 0. 627 1 100. 00 0. 99�� 0. 121 7 1/05/02 16:00 0.491 2 25. 00 0. 96�� 0. 403 4 3/06/03 21:00 0.412 3 10. 00 0. 9��� 0. 104 8 8/26/04 2:00 0. 403 4 5. 00 O. �C� 0. 167 6 1/08/05 2: 00 0.262 5 3 . 00 O. c'c� 0.262 5 1/18/06 23: �0 0. 167 6 2 . 00 O. �OC 0. 412 3 11/24/06 7:00 0. 121 7 1 . 30 0.231 0. 627 1 1/09/08 12:00 0. 104 8 1.10 0. 09= Computed Peaks � . 591 50 . 00 0. 9�0 Flow Frequency Analys-s Time Series File:pre.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Pea� - - Peaks - - Rank Return Prob (CFS) (CFS) Period , C. 536 2 2/09/Ol 18: 00 0. 685 1 100 . 00 O . �aO 0. 145 7 1/06/02 3: OC 0.536 2 25 . 00 0. 960 0. 397 4 2/28/03 3:00 0. 412 3 10 . 00 0. 900 0. 014 8 3/24/04 20:00 0. 397 4 5.00 0. 800 0.236 6 1/05/05 8:00 0. 347 5 3.00 0. 65- 0.412 3 1/18/06 21:00 0.236 6 2 . 00 0. 5��� 0. 347 5 11/24/06 4: 00 0. 145 7 1 . 30 0.2?l 0. 685 1 1/09/08 9:00 0. 014 8 1 . 10 O. C91 Computed Peaks O . c3� �� . .,., ,, . °3�� Bypass Peak Comparison �'-cw Freas�r.cy A:�al�_;s_s Time Series File:bypassex-s�. ts- Project Lc�a�irn:,.ea-�'ac �� ^- �.��es-- Flo�.; =r�, , ar.al�,sis------- ---rnn�.a _ _ax F_.;�,� _ _ _����nc�l� - Flow Rate Rank Time of Peak - - Peaks - - Ran;c Re�urn Prob (CFS) (CFS) Period 0. 031 2 2/09/O1 18:00 0.044 1 100. 00 0 . 990 0. 012 7 1/05/02 16: 00 0.031 2 25. 00 0 . 950 0. 026 3 2/28/03 3: 00 0.026 3 10 . 00 0. 900 0.006 8 8/26/04 2 : C0 0.025 4 5 . 00 0.8Q0 0.016 6 1/05/05 8 : 00 0.023 5 3 . 00 0. 65? 0. 025 4 1/18/06 16:00 0.016 6 2.00 0. 5�� 0. 023 5 11/24/06 4 :OC 0. 012 ? "� . 30 0.231 CPH Project No.0035-13-008 October 31,2013 CP�H CONSULTANTS Active Storage Liberty Gardens Technical Information Report City of Renton Appendix B-Page 8 of 8 u. �44 1 1/09/08 9: 00 0. 006 8 1 . 10 0. :,91 Computed Peaks 0. 040 50 . 00 0. 980 Flow Frequency Analysis Time Series File:bypassdev.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- �1cw Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0 . 049 4 2/09/O1 2 : 00 0.111 1 100. 00 0. 990 0 . 029 6 1/05/02 16: 00 0. 061 2 25. 00 0. 960 0 . 061 2 2/27/03 7 : 00 0.051 3 10. 00 0. 900 0 . 020 8 8/26/04 2 : 00 0.049 4 5. 00 0. 800 C . 028 7 1/05/05 8: 00 0.046 5 3. 00 0. 667 C . 051 3 1/18/06 16: 00 0. 029 6 2 . 00 0. 500 '� C . 046 5 11/24/06 3: 00 0. 028 7 1 .30 0.231 i C . 111 1 1/09/08 6: 00 0. 020 8 1 . 10 0 . 091 , ��-npat�u P�ak� , . �9� �G. �., C . 9�^ CPH Project No. 0035-13-008 October 31, 2013 �� CP�H CONSULTANTS Active Storage I �I � J� CONSULTANTS APPENDIX C ; WETPOOL SIZING CALCULATIONS I� i Site Planning Civil Engineering Project Manogement land Development Consulting Client/Project L�QEIQ TY C�A2i��iU� Project No. (X 3.S— 1,��60� Subject Gt?Q 55z'Cg�.::G C 0 N S U LTA N T S Prepared by G� Date ��sll3 Checked by Date Y�- _ [�,`���,5(�0��} `l3S�Q�/� � �. ZS{S,3S7�,G� �/�,S�vsF��� �, 0 39�'=� �� = S 33D.5 �� �,�m = � ��.��C�, ��.E:� = 2y991, S �� Site Planning • Civil Engineering• Projed Management• Land Use Consulling Sheet_of_ PH CONSULTANTS APPENDIX D BACKWATER CALCULATIONS � Site Planning Civil Engineering Project Management land Development Cansulting i � - Appendix D.1. - CPH Rational Calculations 100-year � _ 10 r 25 r 100 r � Project Name: Liberty Gardens a, 2.44 2.66 2.61 (KCSWDM Table 3.2.1.B) CPH Project No.:0035-1 3-008 b, 0.64 0.65 0.63 (KCSWDM Table 3.2.1.6) ' Pa 2.9 3.4 3.9 (KCSWDM Figures 3.2.1.A-D) � Description: Liberty Gardens Storm System i � � �lo�.+-�ar� .• _ength of _ -r�vel T�me -y ��- _=ny�h of Dicmeter Sloo�ot ,q-n^.g> +'=_iccity � Basin � :�1 � �ioci��. r� e�T���ie �� � �1 �_ �. S��ope a•'v'�P� Flo��:path �.;sed i>. i- ��� 3as��° 'ctal �Ipa of Pi�e P�pe '�.a:ue =�_I � �F C!- ,.�?crlo To C� �� Jubbasin iacresi �res; � ;fos i��,o-es: . .cc�es� 'cfs'� fcfs; ifeet; InG���s� ��.`t fr` "��" �;sy `-��I �_r; � (Tt;ft; Tan�e 32.1.C, f�eti m;nures� (_ CB10 0.90 0.09 0.25 0.06 0.64 0.02 1 3.50 1.91 20 0.17 6.30 0.82 3.19 0.15 0.31 15.36 KCBW �- C820 0.90 0.17 0.25 0.11 0.64 0.02 13.50 1.91 20 0.17 6.30 0.82 3.19 0.28 0.58 13.91 KCBW `-- CB30 0.90 0.01 0.25 0.01 0.68 0.02 13.50 1.91 20 0.17 6.30 0.82 3.19 0.02 0.05 13.34 KCBW CB40 0.90 0.08 0.25 0.06 0.64 0.07 13.50 3.57 60 0.28 6.30 0.62 3.19 0.14 0.29 4.04 KCBW CB50 D.90 0.13 0.25 0.09 0.64 0.06 13.50 3.31 100 0.50 6.30 0.82 3.19 0.21 0.44 3.11 KCBW CB60 0.90 0.02 0.25 0.00 0.90 0.02 13.50 1.91 20 0.17 6.30 0.82 3.19 0.02 0.06 1.60 KC6W CB70 0.90 0.17 0.25 0.11 0.64 0.02 13.50 1.91 20 0.17 6.30 0.82 3.19 0.28 0.57 1.55 KCBW CB80 0.90 0.19 0.25 0.13 0.64 0.02 13.50 1.91 40 0.35 6.30 0.82 3.19 0.31 0.64 0.97 KCBW CB90 0.90 0.07 0.25 0.03 0.71 0.02 13.50 1.91 40 0.35 6.30 0.82 3.19 0.10 0.22 0.22 KCBW _ CB100 0.90 0.29 0.25 0.22 0.62 0.02 13.50 1.91 10 0.09 8.30 0.82 3.19 0.51 1.00 9.25 KCBW CB110 0.90 0.02 0.25 0.01 0.70 0.02 13.50 1.91 50 0.44 6.30 0.82 3.19 0.03 0.07 7.17 KCBW CB120 0.90 0.21 0_25 0.13 0.65 0.02 13.50 1.91 20 0.17 6.30 0.82 3.19 0.34 0.70 7.10 KCBW CB130 0.90 0.26 0.25 0.17 0.64 0.02 13.50 1.91 20 0.17 6.30 0.82 3.19 0.44 0.89 5.75 KCBW CB140 0.90 0.03 0.25 0.01 0.74 0.02 13.50 1.91 65 0.57 6.30 0.82 3.19 0.04 0.09 3.56 KCBW i CB150 0.90 0.09 0.25 0.04 0.68 0.07 13.50 3.57 120 0.56 6.30 0.82 3.19 0.13 0.28 3.47 KCBW � CB160 0.90 0.31 0.25 0.17 0.67 0.02 13.50 1.91 40 0.35 6.30 0.82 3.19 0.48 1.02 3.19 KCBW � C8170 0.90 0.26 0.25 0.14 0.67 0.02 13.50 1.91 120 1.05 6.30 0.82 3.19 0.40 0.86 2.17 KCBW C8180 0.90 0.20 0.25 0.11 0.67 0.07 13.50 3.57 120 0.56 6.30 0.82 3.19 0.31 0.67 1.07 KCBW � �� ��_ CB190 0.90 0.12 0.25 0.08 0.64 0.02 13.50 1.91 50 0.44 6.30 0.82 3.19 0.20 0.41 1.15 KCBW (' ' CB200 0.90 0.12 0.25 0.04 0.74 0.08 13.50 3.82 208 0.91 6.30 0.82 3.19 0.15 0.36 0J4 KCBW �- C6210 0.90 0.11 0.25 0.06 0.68 0.08 13.50 3.82 190 0.83 6.30 0.82 3.19 0.17 0.38 0.38 KCBW � ; � C CB45 0.90 0.20 0.25 0.10 0.68 0.04 13.50 270 65 0.40 6.30 0.82 3.19 0.30 0.64 0.64 KCBW CB55 0.90 0.32 0.25 0.17 0.67 0.07 13.50 3.57 120 0.56 6.30 0.82 3.19 0.50 1.07 1.07 KCBW CBSS 0.90 0.03 0.25 0.02 0.70 0.02 13.50 1.91 40 0.35 6.30 0.82 3.19 0.05 0.11 0.11 KCBW CB105 0.90 0.15 0.25 0.83 0.35 0.01 13.50 1.35 80 0.99 6.30 0.82 3.19 0.98 1.08 1.08 KCBW CB125 0.90 0.19 0.25 0.14 0.62 0.01 13.50 1.35 15 0.19 6.30 0.82 3.19 0.33 0.65 0.65 KCBW CB135 0.90 0.38 0.25 0.25 0.64 0.02 13.50 1.91 150 1.31 6.30 0.82 3.19 0.63 1.29 1.29 KCdW CB175 0.90 0.07 0.25 0.05 0.63 0.02 13.50 1.91 80 0.70 6.30 0.82 3.19 0.12 0.24 0.24 KCBW CB185 0.90 0.12 0.25 0.06 0.67 0.07 13.50 3.57 120 0.56 6.30 0.82 3.19 0.18 0.40 0.40 KCBW �� - CPH Consultanis Liberty Gardenz 11/1j2013 '- CPH Rational_003513008-130604 l Appendix D.2. - CPH Rafional Calculations 25-year 10 r 25 r 100 r Project Name: Liberty Gardens a, 2.44 2.66 2.61 (KCSWDM Table 3.2.1.6) CPH Project No.:0035-1 3-008 b, 0.64 0.65 0.63 (KCSWDM Table 3.2.1.B) Pw 2.9 3.4 3.9 (KCSWDM Figures 3.2.1.A-D) Description: Liberty Gardens Storm System �1 42 = : �' _- ��-e�T�re 3 Q- Oal � g��of �ia�-�et�� 5�pa of va�oluPc s _� ���•y feeti minur ` lowpath Basi � ._, , �� - `� -- � ,, . , SIoPe K J� :., °�..rcY�� -.�' . _ �i �P .F2 '�- l,l� Y F'at�r �� S�boosin � �a��es� o^es�� .rr fr� `cble 3.2.' � .fos� 1 . ���'u�es. es V`-`• ��s efs�, �sar� Jncnesl (ft:�ft; .�.� :�5. =u. .cis� CB10 0.90 0.09 0.25 0.06 0.64 0.02 13.50 1.91 20 0.17 6.30 0.80 2.73 0.15 0.26 13.16 KCBW C820 0.90 0.17 0.25 0.11 0.64 0.02 13.50 1.91 20 0.17 6.30 0.80 2.73 0.28 0.49 11.91 KGBW C830 0.90 0.01 0.25 0.01 0.68 0.02 13.50 1.91 20 0.17 6.30 0.80 2.73 0.02 0.04 11.42 KCBW CB40 0.90 0.08 0.25 0.06 0.64 0.07 13.50 3.57 60 0.28 6.30 0.80 2.73 0.14 0.24 3.46 KCBW CB50 0.90 0.13 0.25 0.09 0.64 0.06 13.50 3.31 100 0.50 6.30 0.80 2.73 0.21 0.37 2.66 KCBW CB60 0.90 0.02 0.25 0.00 0.90 0.02 13.50 1.91 20 0.17 6.30 0.80 2.73 0.02 0.05 1.37 KCBW C870 0.90 0.17 0.25 0.11 0.64 0.02 13.50 1.91 20 0.17 6.30 0.80 2.73 0.28 0.49 1.32 KCBW CB80 0.90 0.19 0.25 0.13 0.64 0.02 13.50 1.91 40 0.35 6.30 0.80 2.73 0.31 0.55 0.83 KCBW CB90 0.90 0.07 0.25 0.03 0.71 0.02 13.50 1.91 40 0.35 6.30 0.80 2.73 0.10 0.19 0.19 KCBW CB100 0.90 0.29 0.25 0.22 0.62 0.02 13.50 1.91 10 0.09 6.30 0.80 2.73 0.51 0.86 7.92 KCBW CB110 0.90 0.02 0.25 0.01 0.70 0.02 13.50 1.91 50 0.44 6.30 0.80 2.73 0.03 0.06 6.14 KCBW C8120 0.90 0.21 0.25 0.13 0.65 0.02 13.50 1.91 20 0.17 6.30 0.80 2.73 0.34 0.60 6.08 KCBW CB130 0.90 0.26 0.25 0.17 0.64 0.02 13.50 1.91 20 0.17 6.30 0.80 2.73 0.44 0.76 4.92 KCBW CB140 0.90 0.03 0.25 0.01 0.74 0.02 13.50 1.91 65 0.57 6.30 0.80 2.73 0.04 0.08 3.05 KCBW CB150 0.90 0.09 0.25 0.04 0.68 0.07 13.50 3.57 120 0.56 6.30 0.80 2.73 0.13 0.24 2.97 KCBW CB160 0.90 0.31 0.25 0.17 0.67 0.02 13.50 1.91 40 0.35 6.30 0.80 2.73 0.48 0.88 2.73 KCBW CB170 0.90 0.26 0.25 0.14 0.67 0.02 13.50 1.91 120 1.05 6.30 0.80 2.73 0.40 0.74 1.86 KCBW C8180 0.90 0.20 0.25 0.11 0.67 0.07 13.50 3.57 120 0.56 6.30 0.80 2.73 0.31 0.57 0.91 KCBW CB190 0.90 0.12 0.25 0.08 0.64 0.02 13.50 1.91 50 0.44 6.30 0.80 2.73 0.20 0.35 0.98 KCBW CB200 0.90 0.12 0.25 0.04 0.74 0.08 13.50 3.82 208 0.91 6.30 0.80 2.73 0.15 0.31 0.63 KCBW CB210 0.90 0.11 0.25 0.06 0.68 0.08 13.50 3.82 190 0.83 6.30 0.80 2.73 0.17 0.32 0.32 KCBW CB45 0.90 0.20 0.25 0.10 0.68 0.04 13.50 2.70 65 0.40 6.30 0.80 2.73 0.30 0.55 0.55 KCBW CB55 0.90 0.32 0.25 0.17 0.67 0.07 13.50 3.57 120 0.56 6.30 0.80 2.73 0.50 0.92 0.92 KCBW C885 0.90 0.03 0.25 0.02 0.70 0.02 13.50 1.91 40 0.35 6.30 0.80 2.73 0.05 0.09 0.09 KCBW CB105 0.90 0.15 0.25 0.83 0.35 0.01 13.50 1.35 80 0.99 6.30 0.80 2.73 0.98 0.92 0.92 KCBW C6125 0.90 0.19 0.25 0.14 0.62 0.01 13.50 1.35 15 0.19 6.30 0.80 2.73 0.33 0.56 0.56 KCBW C6135 0.90 0.38 0.25 0.25 0.64 0.02 13.50 1.91 150 1.31 6.30 0.80 2.73 0.63 1.11 1.11 KCBW CB175 0.90 0.07 0.25 0.05 0.63 0.02 13.50 1.91 60 0.70 6.30 0.80 2.73 0.12 0.21 0.21 KCBW CB185 0.90 0.12 0.25 0.06 0.67 0.07 13.50 3.57 120 0.56 6.30 0.80 2.73 0.18 0.3a 0.34 KCBW cvH co�:�ira�rs Liberry Gardens l l r'1;2013 CPH Rational 003513008-130604 1 Ap�endiz D.3.-CPH 3ackwater Cc'cvlcr ons �xOJEQ: ❑bery Gcrcens DATE: 1 1 j 1/2013 DESCRIPTION: Siorm drafm m�veyance sysrem for li6eny Gardens:Backwaier Spreadsheet.I OC yea.s�o.- CPH PROIECT No. 0035-13-008 1 � 3 � 5 6 7 8 9 10 11 12 73 l4 15 16 17 '.9 `�9 20 Upstream Barrel O�rler Inlet Approoch Design Fiow Monningi Dowmtream Ba.rel Borrel TW Barrel Frioion Fricrion Enrronce HGl Enteronce Lass Emronce Exit Head Cr�.�cal Crf*iml Bend Meaa lunr�on Head Rim PIPE SEGMENT Q LengM Pipe Srze � Imert Elevation Iniei Pipe Sbpe Area Vel«iry �e���Y Elevallon Pertmeter Slope Loss Eleva�ion Cceffkienr Heod Loss �s Conrrol dJD Depth Velxiry Control velocfry Kn loss Q���� K Hecd�oss woier Elevorion Overf o�«� Ele+arion Head Ele.ar�on Ele.aiion Head D/SCB U�SCB �ds� jftj f�"n� ;h; (h) ;kjk� �sq.ft) �fps) (fr) �ft� �ft� $� (fr) (k) k� fh� (tt� ;fr� �fQ (fps) (fti (ft;� (h) (%) ;h'� (ftJ (fr� Pond CBIO 15.36 53.4 24 0.012 402 405.66 0.069 3.1a 4.89 0.37 411.22 6.28 0.00 0.21 411.43 0.50 0.19 0.37 411.98 0.57 1.14 6.06 40670 0.96 0.00 0.000 0% 0.00 0.00 411.02 415.12 Como�ned C810 C620 13.91 a0.6a IB 0.012 406.16 a06.8a 0.017 1.77 7.87 0.96 411.02 4.71 0.01 0.60 411.62 0.50 0.48 0.96 a13.07 0.57 0.86 5.25 a09.66 0.88 0.00 0.000 0% 0.00 0.00 412.18 416.37 Comained C820 C630 13.34 83.44 18 0.012 406.84 607.91 0.013 1.77 7-55 0.88 412.1B 4.71 0.01 1.14 413.32 0.50 0.44 0.88 414.65 0.57 0.86 5.25 410.54 0.41 0.00 0.000 0% 0.00 0.00 414.24 417.85 Contained CB30 C640 4.04 38.1 12 0.012 408.41 4ll.B 0.246 079 5.14 0.41 414.24 3.14 0.01 0.41 418.80 0.50 0.71 0.41 419.42 0.57 0.57 4.28 419.68 0.24 0.00 0.000 0% 0.00 0.00 419.44 422A5 Con�ained C840 CB50 3.11 90.25 12 0.012 417.8 a25.95 0.090 0.79 3.96 0.2a 419.44 3.14 0.01 0.58 426.95 0.50 0.12 01a 427.32 0.57 0.57 4.28 427.31 0.06 0.00 0.000 0% 0.00 0.00 427.25 a30.22 Cootoined GB50 C660 1.6 130.25 12 0.012 425.95 434.58 0.066 0.79 2.04 0.06 427.25 3.14 0.00 0.22 43558 0.50 0.�3 0.06 435.68 0.57 0.57 4.28 435.50 0.06 0.00 0.000 0'/ 0.00 0.00 435.62 aA0.3 Contai�ed CB60 CB70 I.SS 60.06 12 0.012 434.58 a35.18 0.010 0.79 1-97 0.06 435.62 3.14 0.00 0.10 436.18 0.50 0.03 0.06 436.27 0.57 0.57 4.28 436.12 0.02 0.00 0.000 0% 0.00 0.00 436.25 a40.07 Cor�tained C870 CB80 0.97 55 12 0.012 435.92 a40.02 0.091 0.79 1.24 0.02 436.75 3.14 0.00 0.03 a41.92 0.50 0.01 0.02 441.06 0.57 0.57 4.28 4a1J8 0.00 0.00 0.000 0% 0.00 0.00 441.95 a4a.96 Contained C880 CB90 0.2Z 80.72 12 0.012 a40.92 a47.38 0.080 0.79 0.28 0.00 4a1.95 3.14 0.00 0.00 a48.38 0.50 0.00 0.00 448.38 0.57 0.57 4.78 4a8.20 0.00 0.00 0.000 0% 0.00 0.00 e48.38 452.55 C«�tained CB30 CB100 9.25 101.85 18 0.01� 407.91 408.93 0.010 1.77 5.23 0.43 412.18 4.71 0.01 0.67 a12.85 0.50 0.21 O.a3 413.49 0.57 0.86 5.25 410.48 0.�6 0.00 0.000 0°/ 0.00 0.00 a13.23 413.93 Contained CB100 CBI10 7.17 75.28 18 0.012 a08.93 a09.68 0.010 1.77 a.06 0.26 413.23 4.71 0.00 0.30 a13.53 0.50 0.13 0.26 413.91 0.57 0.86 5.75 410.7a 0.25 0.00 0.000 0% 0.00 0.00 a13.66 414.27 Coma�ned CB110 CB120 7-I 57.22 18 0.017 a09.68 410.25 0.010 1.77 a.02 0.25 413.66 4.71 0.00 0.22 a13.8B 0.50 0.13 0.25 41a.26 0.57 0.86 5.25 411.30 0.83 0.00 0.000 0% 0.00 0.00 a13.a3 415.08 Comoined CB170 CB130 5.75 92.15 12 0.012 a10.75 415.33 0.050 0.79 7.32 0.83 413.43 3.14 0.02 2.02 416.33 0.30 0.42 0.83 417.SB 0.57 0.57 4.28 418.81 0.32 0.00 0.000 0% 0.00 0.00 418.a9 420.73 Conrai�d C8130 CB140 3.56 115.85 12 0.012 415.3 a21.2 0.051 0.79 a.53 0.32 418.49 3.14 0.01 0.98 a27.20 0.50 0.16 0.32 a22.6B 0.57 0.57 4.28 422.85 0.30 0.00 0.000 0% 0.00 0.00 422.55 432.Oa Conroi�d CB140 CB750 3.47 5658 12 0.012 421.2 421.77 0.010 0.79 4.a2 0.30 422.55 3.1a 0.01 O.aS 423.00 0.50 0.15 0.30 423.ab 0.57 0.57 d.28 423.38 0.26 0.00 0.000 0% 0.00 0.00 423.20 a35.05 Conrained CB150 CB760 3.19 25.59 12 0.012 a21J7 422.03 0.010 079 a.06 016 423.20 3.14 D.01 0.17 423.37 0.50 0.13 0.26 423J6 0.9 0.57 a18 423.48 0.12 0.00 0.000 04e D.00 0.00 423.64 a35.58 Conroi�ed CB160 C8170 1.17 87.31 17 0.012 422.03 42�.9 0.010 0.79 2.76 0.12 423.64 3.14 D.00 0.27 423.91 0.50 0.06 0.12 424.09 0.57 0.57 a.28 a73.91 0.03 O.DO 0.000 0% 0.00 0.00 424.06 d33.57 Cor,rained CB170 CB180 1.07 Ia5.64 12 0.012 422.9 424.36 0.010 0.79 1.36 0.03 424.06 3.14 D.00 0.11 425.36 0.50 0.01 0.03 425.a0 0.57 0.57 a.28 425.26 0.00 0.00 0.000 0% 0.00 0.00 425.40 aZ8.78 Contoined CB10 C8190 1.15 52.1a 12 0.012 406.66 408.96 0.044 0.79 1.a6 0.03 411.22 3.1a 0.00 0.05 411.27 0.50 0.04 0.03 411.32 0.57 OS7 4.28 a09.85 0.01 0.00 0.000 0% 0.00 0.00 411.30 a137 Contained CB190 C8200 0.74 122.35 12 0.012 408.96 415.05 0.050 079 0.94 0.01 411.30 3.14 D.00 �.04 416.05 OSO 0.01 0.01 416.07 0.57 OS7 4.28 415.91 0.00 0.00 0.000 0% 0.00 0.00 416.07 419.46 Contained CB200 C8210 0.38 223.58 12 0.012 a15.05 425.11 0.045 079 O.aB 0.00 a16.07 3.1a 0.00 0.02 426.I1 OSD 0.00 0.00 426.12 OS7 0.57 4.28 425.95 0.00 0.00 0.000 0% 0.00 0.00 426.12 430.5 Conteined CBaS CB45 0.64 2a3 12 0.012 a17.8 a18.05556 0.010 0.79 0.81 0.01 ala.2a 3.1a 0.00 0.01 4t9.06 OSO 0.01 0.01 419.07 0.57 0.57 4.28 418.93 0.00 0.00 0.000 0°/ 0.00 0.00 419.07 422.D5 Conrained CB55 C855 1.07 24.5 12 0.012 425.95 426.2 0.010 0.79 1.36 0.03 a19.44 3.14 0.00 0.02 427.Z0 0.50 0.01 0.03 427.24 0.57 0.57 4.28 427.10 0.00 0.00 0.000 0% 0.00 0.00 427.24 430.22 Cmmined C885 CB85 0.11 �6.18 12 0.012 440.92 441.18 0.010 0.79 0.14 0.00 436.25 3.14 0.00 0.00 442.18 0.50 0.00 0.00 442.18 0.57 0.57 4.18 442.03 0.00 0.00 0.000 0°/ 0.00 0.00 442.18 a45.1B Contained CBI05 CB105 1.08 23.6 12 0.012 409.43 409.9 OA20 0J9 1.38 0.03 412.10 3.14 0.00 0.02 412.20 0.50 0.01 0.03 412.25 0.57 0.57 4.28 410.80 0.00 0.00 0.000 0% O.DO 0.00 412.25 a139 Comoined CB125 CB125 0.a5 24.5 I� 0.012 410J5 411.08 0.013 079 O.B3 0.01 413.66 3.14 0.00 0.07 413.67 OSO 0.01 0.01 413.68 0.57 0.57 a.28 a11.95 0.00 0.00 0.000 0% 0.00 0.00 413.68 415.08 Contoined CB135 CB135 1.29 24.5 12 0.012 415.33 a16.72 0.057 0.79 1.64 0.04 413.a3 3.14 0.00 0.03 a17.72 0.50 0.02 0.04 417.78 0.57 037 4.28 a17.62 0.00 0.00 0.000 0°/ 0.00 0.00 a17.70 420.73 Conrained CB175 CB175 0.24 25.a 12 0.012 422.9 a29.n 0.244 0J9 031 0.00 423.64 3.14 0.00 0.00 a30.11 0.50 0.00 0.00 430.11 0.57 0.57 4.28 429.85 0.00 0.00 0.000 0°/ 0.00 0.00 430.11 a33.11 Contained CB185 CBI85 0.41 25 12 0.012 424.36 a2a.61 0.010 0.79 0.52 0.00 424.06 3.14 0.00 0.00 a25.61 0.50 0.00 O.DO 425.62 0.57 0.57 4.28 425.47 0.00 0.00 0.000 0°'0 0.00 0.00 425.62 428.62 Contoined I IApaendix D.a.-CPH 3ack«c•er Cciculorions �RO:ECT: libe-ry Gardens DATE: I 1 j I;201 3 DESCRIPTION: Srorm droin conveyance ryz�em for Libeny Gardens Backworer Spreadsheer.25 year storm. CPH PROJECT No. 0035-13-008 1 2 3 s 5 6 7 8 9 10 1' '2 13 14 15 16 '.7 18 �9 20 Uprream Borrel OuHer Inle� Approa h Design Flow Manning's Downsrreom Barrel Barrel TW Borrel Friction Frioim Entronce HGl Enrerorae Loss Emrance Ean Head Crkicol Cri*icol Be�d Hecd Junoim ��eac R�m PIPE SEGMENT Q Length Pipe Size n Invert Elevarion Inler Pipe Slope qrea Velocity Vel«iry Ele.ation Perimete� Slope Lozs Elevotion Cceffkient �ead loss Loss Connol dJD DepN+ Velociry Comwl Vebciry Kp ,oss ���Q� K Head Loss wore- Elevotion O.erflo..? Ekvotion Head Elevorion Elevarim Head DISC6 U;SCB �cfsl ;hl i��1 fF�l (frl (ft/fY1 �sq.fr) (fPs) (��; (h) (f�) S. (ft) ;hl ke (F�) ihl If�l ffr� IFPsI Ifry' Ihl IFt; I°o; iHl IF�I (Frl Pond C810 13.16 53.4 24 0.012 402 405.66 0.069 3J4 4.19 0.27 410J7 6.28 0.00 0.15 410.92 0.50 0•14 0.27 411.33 0.57 1.14 6.06 a06.65 0.71 0.00 0.000 0% 0.00 O.DO 410.63 415.12 Conmined CB10 C820 11.91 40.64 I8 0.011 406.16 406.84 0.017 1.77 6J4 0.71 a10.63 471 0.01 0.44 411.07 0.50 0.35 0.71 412.13 0.57 0.86 5.25 a09.05 0.65 0.00 0.000 0% 0.00 0.00 e11.48 416.37 C«�fair�ed CB20 C830 l 1.a2 83.a4 18 0.012 406.Ba 407.91 0.013 1.77 6.a6 0.65 al i.46 471 0.01 0.83 412.31 0.50 0.32 0.65 a13.28 OS7 0.86 5.25 409.98 0.30 0.00 0.000 0°/ 0.00 0.00 412.98 417.85 Canwined CB30 C640 3.a6 38.1 12 0.012 408.41 a17.8 0.2a6 0.79 4.a1 0.30 a12.96 3.14 0.01 0.30 418.80 0.50 0.15 0.30 d19.25 0.57 0.57 4.28 419.29 0.18 0.00 0.000 0% 0.00 0.00 419.11 422.05 Conrained CB40 CB50 2.66 90.25 12 0.012 417.8 425.95 0.090 0.79 3.39 0.18 a19.11 3.14 0.00 0.42 426.95 0.50 0.09 0.18 427.22 0.57 037 4.28 426.97 0.05 0.00 0.000 0% 0.00 0.00 4�7.17 430.22 Contained CB50 CB60 1.37 130.25 12 0.012 a25.95 434.58 0.066 0.79 1.74 0.05 427.17 3.14 0.00 0.16 435.58 0.50 0.02 0.05 a35.65 0.57 0.57 4.28 435.48 0.04 0.00 0.000 D% 0.00 0.00 a35.61 440.3 Coma�ned CB60 C670 1.32 60.06 12 0.012 a3a.58 435.18 0.010 0.79 1.68 0.04 a35.61 3.14 0.00 0.07 436.18 0.50 0.02 O.Oa a36.25 0.57 0.57 4.28 a36.10 0.02 0.00 0.000 0°/ 0.00 0.00 a36.23 4a0.07 Conioined CB70 CB80 0.83 55 12 0.012 a35.92 4a0.92 0.091 0.79 ).06 0.02 436.23 3.14 0.00 0.03 d41.97 0.50 0.01 0.02 a41.95 0.57 0.57 4.28 aai.n 0.00 0.00 0.000 0% D.00 0.00 a41.95 4a4.96 Comained CB80 CB90 0.19 80.72 12 0.012 a40.92 4a7.38 0.080 0.79 0.2a 0.00 441.95 3.14 0.00 0.00 a48.38 0.50 0.00 0.00 a48.38 0.57 0.57 4.28 4s8.20 0.00 0.00 0.000 0% 0.00 0.00 a48.38 452.55 Coniained � CB30 CBI00 7.92 101.85 18 0.012 a07.91 408.93 0.010 1J7 4.48 0.31 411.aB a71 0.00 0.49 a11.97 0.50 0.16 0.31 412.43 0.57 0.86 5.15 410.21 0.19 0.00 0.000 0% 0.00 0.00 412.25 413.93 Contoined CBI00 CBI10 6.1a 75.28 18 0.012 a08.93 409.68 0.010 1.77 3.47 0.19 412.25 4.71 0.00 0.22 412.a6 0.50 0.09 0.19 412.75 0.57 0.86 5.75 410.69 0.18 0.00 0.000 0% 0.00 0.00 412.56 a1a.27 Conroi�d CBI10 C8120 6.08 57.22 1B 0.012 409.68 410.25 0.010 1.77 3.44 0.18 412.56 4.71 0.00 0.16 412.77 0.50 0.09 0.18 413.00 0.57 0.86 5.�5 411.26 0.61 0.00 0.000 0% 0.00 0.00 412.39 a15.08 Cor�tained C8170 CB130 4.97 92J5 12 0.012 410.75 415.33 0.050 079 6.26 0.61 412.39 3.14 0.02 1.a8 a16.33 0.50 0.30 0.61 417.24 0.9 0.57 4.28 a18.02 0.23 0.00 0.000 0% 0.00 0.00 417J8 a20.73 Conrained C8130 CBInO 3A5 115.85 14 0.0'2 d15.3 421.2 0.051 079 3.88 0.23 4V78 3.14 0.01 0J2 422.20 0.50 0.11 0.23 422.55 0.57 0.57 4.78 a22.55 0.22 0.00 0.000 0% 0.00 0.00 422.33 a32.04 Cmrained CB140 CBI50 2.47 56.58 12 0.072 421.2 421.77 0.010 0J9 378 0.22 472.33 3.14 0.01 0.33 ez2n OSO 0.11 0.22 423J0 0.57 0.57 a.28 a23.10 0.19 0.00 0.000 0% 0.00 0.00 422.92 435A5 Contained CBI50 G8160 2.73 25.59 12 0.014 421.77 a22.03 0.010 0J9 3.48 0.19 422.92 3.14 0.00 0.13 423.04 OSO 0.09 0.19 423.32 0.57 0.57 428 a23.10 0.09 0.00 0.000 0°/ 0.00 0.00 423.7a 435.58 Contained CB160 CB VO 1.86 87.31 �2 0.01 2 422.03 442.9 0.010 0J9 2.37 0.09 423.24 3.14 0.00 0.20 423.90 OSO 0.04 0.09 424.03 0.57 0.57 a.28 423.87 0.02 0.00 0.000 0% 0.00 0.00 474.01 433.57 Contained CB170 C8180 0.91 Ia5.6a 12 0.012 422.9 a24.36 0.010 0J9 1.16 OA2 424.01 3.14 0.00 0.08 425.36 OSO 0.01 0.02 425.39 0.57 0.57 a.20 425.75 0.00 0.00 0.000 0°�6 0.00 0.00 425.39 428.78 Contained C810 CB190 0.98 52.14 12 0.012 406.66 408.96 0.044 0.79 1.25 0.02 410.77 3.1a 0.00 0.03 410.80 OSO 0.01 0.02 410.84 0.57 0.57 4.28 A09.84 0.01 0.00 0.000 D% 0.00 0.00 410.83 413.7 Comoined CB190 CB200 0.63 122.35 12 0.012 408.96 a15.05 0.050 0J9 0.80 0.01 410.83 3Jv 0.00 0.03 416.05 0.50 0.00 0.01 416.06 0.57 057 a.28 415.90 0.00 0.00 0.000 0% 0.00 0.00 a16.06 419.d6 Conra�ned CB200 CB210 032 223.58 12 0.012 415.05 n25.11 0.045 0J9 O.al 0.00 a16.06 3.1a 0.00 OA2 426.11 0.50 0.00 0.00 426.11 0.57 0.57 4.28 425.95 0.00 0.00 0.000 0% 0.00 0.00 426.11 430.5 ContoineC C845 C845 0.55 2a3 12 0.014 4i7.8 418.05556 0.010 0.79 0.70 0.01 a12.98 3.14 0.00 0.00 419.06 0.50 0.00 0.01 419.07 0.57 0.57 e.�8 418A3 0.00 0.00 0.000 0% 0.00 0.00 419.07 d22A5 Cor,toined CBSS CB55 0.92 2a.5 12 0.014 425.95 426.2 0.010 0J9 1.17 O.OZ 419.11 3.14 0.00 0.01 a�7.20 0.50 0.01 0.02 a27.23 0.57 0.57 4.28 427.09 0.00 0.00 0.000 0% 0.00 0.00 421.23 430.22 C«�rained CB85 C685 0.09 26.18 12 0.012 440.92 441.18 0.010 0.79 0.11 0.00 436.23 3.14 0.00 0.00 442.18 0.50 0.00 0.00 442.1 B 0.57 0.57 4.28 442.03 0.00 0.00 0.000 0°/ 0.00 0.00 442.18 445.18 Contained CB105 C6105 0.9� 23.6 12 0.012 409.43 409.9 OA20 0.79 1.17 0.02 411.48 3J4 0.00 0.01 411.49 0.50 0.01 0.04 411.52 0.57 0.57 a.28 410.79 0.00 0.00 0.000 0°/ 0.00 0.00 411.52 413.9 Conra"med CB125 C6125 0.56 24.5 12 0.012 410.75 411.08 0.013 0.79 0.71 0.01 412.56 3.14 0.00 0.01 412.57 OSO 0.00 0.01 412.58 0.57 0.57 a.2B 411.95 0.00 0.00 0.000 0% O.oa O.OD a12.58 n15.08 Co�ratned CB135 C6135 1.11 24.5 12 0.012 415.33 a16.72 0.057 0.79 1.41 0.03 412.39 3.14 0.00 0.02 417J2 OSO 0.02 0.03 417.77 OS7 OS7 4.28 417.60 0.00 0.00 0.000 0% 0.00 0.00 a17.77 420.73 Conmined CB175 CB175 0.2I 25.4 i2 0.012 422.9 a29.11 0.24a 0.79 0.27 0.00 423.24 3.1a 0.00 O.DO a30.11 0.50 0.00 0.00 430.11 0.57 0.57 4.78 429.85 0.00 0.00 0.000 0% 0.00 0.00 430.11 433.11 Cw�tained CB185 C8185 0.34 25 12 0.012 424.36 424.61 0.010 0.79 0.43 0.00 d�6.01 3.14 0.00 0.00 425.61 0.50 0.00 0.00 425.61 0.57 0.57 4.28 475A7 0.00 0.00 0.000 0°�0 0.00 0.00 425.6� 428.62 Contoined