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Home My WebLink About03267 - Technical Information Report - Preliminary t\ �� _ �� . � . � _ � �' Site Development Associates, LLC �m 18322 Bothell Way NE; Bothell, Washington 98011 -- ---------- — Office: 425.48b.6533 Fax:425.485.6593 Preliminarv Drainaqe Report P. �v��oF wnsy�csl - 3�� • '�° Parkside at 95 Burnett W y Renton, Washington �� R�337S 4�7� S� `��N,v,�' 3_2q_os Prepared for [ExPiREs 09/04/0 5 ' TSA Architects Prepared by Site Development Associates, LLC 18322 Bothell Way NE Bothell, WA 98011 425-486-6533 March 28, 2005 � 3a4 � �� ' ' � - I� Site Development Associates, LLC 18322 Bothell Way NE; Bothell, Washington 98�11 Office:425.486.6533 Fax:425.486.6593 Preliminarv Drainaqe Report Parkside at 95 Burnett Renton, Washington Prepared for TSA Architects Prepared by Site Development Associates, LLC 18322 Bothell Way NE Bothell, WA 98011 425-486-6533 March 28, 2005 Table of Contents ; lntroduction.............................................................. 1 Existing Conditions................................................. 1 Existing Onsite Drainage Basin ............................. 1 � Developed Conditions.................................... 1 Proposed Drainage Plan ................................ 1 Defention and Water Quality.......................... 5 Downstream Analysis..................................... 5 References ...................................................... 5 Appendix A- TIR Worksheet List of Figures Figure 1. Vicinity Map.................................................................. 2 Figure 2. Existing Site................................................................... 3 Figure 3. Proposed Site................................................................ 4 INTRODUCTION The Parkside at 95 Burnett project is a 70 unit apartment complex located at 95 Burnett Avenue South within the City of Renton, S17, T23N, RSE, W.M. in King County, Washington. The project is bordered by an existing apartment complex to the north, Burnett Avenue to the east, and the City of Renton Park and Logan Avenue to the west. Figure 1 is the vicinity map depicting the project location. The site is approximately 0.84 acres in size. The site previous was fully developed with various office buildings and associated paved parking areas. These structures have recently been removed from the site, and what remains is a level building pad some debris and vegetation. Figure 2 shows the existing site features. The proposed project will create a four story apartment building with two levels of enclosed parking, one level located slightly below grade, and one level slightly above the existing grade. Street improvements along the property frontage will be required and include, curb, gutter, sidewalk and a landscape strip. Two existing storm catch basins located in Burnett Avenue will need to be relocated as part of the improvements. The proposed site layout is shown on Figure 3. In addition to the roadways, the proposed project will include all utilitiP� �n�i nthPr improvements necessary to accommodate the apartment comple� This report addresses the storm drainage issues associated with th� development of the property, and construction of the frontage impro�C��;� __:. The design standards addressed for this report are contained in Renton Municipal Code Section 4-6-30. Section 4-6-30 specifies that the drainage design analysis shall conform to the standards set forth in the King County Surface Water Design Manual, 1990. EXISTING CONDITIONS Existing On-site Drainage Basin The existing site contained various structures which have been removed to leave a level building pad. The previous structures and surface features discharged undetained to the storm system in Bumett Avenue. DEVELOPED CONDITIONS Proposed Drainage Plan The proposed project will redevelop 0.84 acres of property into an apartment ' complex. The drainage system for the apartments will include roof downspouts and area drains for landscape areas. These drainage elements will connect to the existing storm system in Burnett Avenue describe above. - 1 - , VICINITY MAP �� s y�� = w � OG = Z Z i�� 1 Z y 7 Z N ani sr � i ` � NTON f f � s < Z M NICIP = Z Z � p AI PORT < � ` ` 8 N � � � � � < T = o � N 6TH ST � 1� � � � Z � y W � � 0 m � _ � �V ; � �°-P 7� N � 900 y D � � N D ST �O '�'t S 1321� Sf F NRPORT WAY N 5 N �� o Z J � �i � 900 S 2ND ^ 169 �(F 13 ' �W i Ro � 900 S RD N Ja � 17 L� 16 �JQ � �8 � N � N N 6�9 E7 e �5�P- � �T a a 405 G < > z yh1- R �ra, soo y N ` � 81TE N � � � � �� N � sw mi sr � s rni sr y S G�� < � 515 WpY ��,pY 0 4 aos sM ieni sr 19 20 �, 21 y� < 1 s7 `�Z o� PUGEf 215T SCOIl: N A parkside at 95 Burnett � �; 1 :� PREUMINARY DRAINAOE REPORT F'�1fO - -- _ -- ----- —__ .--------- Site Development Associates, LLC �ob �,. �aN,n M,►� _ ------ ----------_------ ---- - _ 131-001-04 c� - �n ; N88'09'11"w 2 w S �N � I S - ,; 5 I o Z I ; CB I ' I � I o m I i I I RIM=36.24 ' _ � o� � � IE=34.69 8" CONC N - � - � I �� I ; CB I BRICK � � �vmi � ' SSMH II 48" EIM3511 ,4" GALVANIZE I � RIM=36.46 z N ( � �-, � , IE=26.31 8' PVC N � � � �- - - - J ; S IE=26.46 8'? S I SE - - - - - cn - - - - - � IE=26.368" PVC E I � 5 5 � LADDER W SSMH II 48` I � a � - - - - - - - �_ - II E�M27698� Pvc r � � � IE-27.92 8 PVC S � IE=31.67 DROP PV I q"v N � � N8879�12"W � SSMH II 48" IE=27.87 8"? W � 4'? E � : 109.50'" � RIA�=36.12 � W I � � � � IE=15.92 16'+/- � E � � iE=16.02 �s'+-/ . w I � I I� I � LADDER SW I SDMH II 48" � � I o I a RIM=36.76 C N � � o I I IE_30.33 8 CONC N II IE-30.96 8" PVC E � I � � - - �N88 29'12"W IE=30.31 8" CONC S I � w �o o- CB I IE=33.46 12" ADS W � � ni I Z RIM=36.25 I I � o IE=34.25 12 ADS E � I I �� I � � I � .. ,� � � �; � I x - � � � r `�s � �I ,° � I � \ � I d � � � L � c � � I � � ° N I o � I TI � � � I � � w � O ° � I ' � o � -T� y � o o CB 2' N\S X 0.8 E\W /lJ � �. ,,,,, � O � RIM=36.43 � e� I � � fE=35.63 6" CONC E � � v' I � I CB I BRICK �I � � RIM=36.84 /v � I O � - - I IE=35.54 6" CONC W � � O � ° SDMH II BRICK --� � � RIM=37.24 � IE=31.34 8" CONC S � i � � I IE=31.39 8" CONC N z � � IE=33.04 6" CONC E I I � � IE=33.04 6" CONC W -O � I IE=31.66 9" CMP SE I SSCO � � � � 6 0' RIM=37.31 . I I � - -IE=35.79 10" CONC S- - - � � 109.50' cn � 'yly � N88 29'i2"'W �� i � °T 1 � � -� e� � =35.90 - - - - - - - - - 34.40 8" PVC SE I � � � 2 s�o�e: � _ �.�. �•=50� perkside at 95 Burnett - PREUMINARY DRAINA�E REPORT Figuro Z __..___ __ _ _- ____ _-- Site Development Associates� LLC �ob No. EXISTING 81TE - .. 131-001-04 i - :l. , � , � ��- ��_� _ } � _ . . � _ �.� � � , J �_____ ` � � � _s��H ,� �• ��,-. �. - � � � � ; �:�a==s.� -��:3f 8` r1� f�3 i� - � i� I�-=�.�#6 8''? 5 ---.�,E_.. v � `- , {! f��5 3f A" P�' } C�Ii�E;� �iY F ; : � �`r� - � € }t -. `��.'. � k . '^.,.. l�=�7.�3�.,. . _ , `� i .��._�__.�...__, sl � � �� 3s �.; �r: � - �,�.�_ --�— �� ,.$•_ ��__ f ' ��;s �z � ��=��.s� , - � i .. ,. ,=_,s.o2 � --��_ ��e� �� ---sc�+tr is �� ` � � ��._� :;--- ; � - �F=34 3? �; . .- • -t � � � ��3t}��i r'.' �dt � ; t r% Mecav,rr�f._ �A. `�, _ �• i � � "LEt � � �� , " � � , � , � . `�. � � :E �;��i _:. � �� I : � . , �� . . ; � �_ i� �� • �� ! �t� �� = �'� i � I � i ��''�.= ,� s �:j - ��? _ � � � +f �R�� F-r"t. �tJ ,r 3�- � 3__ 1 s�� `.��. _� li �� - [}�F3 ti ��_ .i R;�A=37.�� {£=3i 34 8' r � �,� � i�=a'�.3� S L �: � , 3E �3.�?4 � t.��F_ � _ �i(� , !E ��.�2� 6 CG•=- � ' ?,�a 9 f•l�ir � �� I � ;_ ��_ � � �.�� - - � _;� i I _ � . x� � I N � i t ! ! _ � SC0�8: �� i�=5o� parkside at 95 Burnett * PREUMINARY DRAINAOE REPORT F'�� .� ______. -----____--__-- —_.. Site Development Associates, LLC_ �ob No. PROP08ED 81TE -------i. . - - 131-001-04 Detention and Water Quality Detention and water quality are not proposed for this project. Detention is not proposed because the existing site was almost entirely impervious, and the ' proposed site will be very similar. In addition, the site is approximately 425 feet from the discharge point at the Cedar River, which is under the '/4 mile threshold for detention. Water quality is not proposed because all parking area, which is the only pollution generating surface, will be fully enclosed and drainage will be i collected by floor drains connecting to the sewer system in Burnett Avenue. Downstream Analysis The storm system that the proposed project will drain to runs north for 250 feet I� along Burnett, then turns and runs east for 125 feet along an access drive south of the Williams Condominium complex. At Williams Avenue, the storm system turns north and runs 50 feet where it is assumed that it daylights to the Cedar ' River. REFERENCES , City of Renton , Municipal Code, current through Ordinance 5020, passed September 29, 2003 King County SurFace Water Design Manual, 1990 - 5 - Appendix A-T!R Worksheet King County Department of Development and Environmental Services TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 1 PROJECT OWNER AND Part 2 PROJECT LOCATION AND PROJECT ENGINEER DESCRIPTION Project Owner P oject Name ParKs;d� a� 95 8utne�� L1,G ��,t V,.s i de a�' q5 �r�e�'E' Address Location 225�v 38�E�. ��4<.,e �qS�' Township 23 N Phone Range 'rJ E 20�- 322. � 13g1 Project Engineer •••••••••�•�.Section �7 i i a mn _ G S�� CompanySi�E DtVt�e�o�c�ere�-�85OG� Address/Phone 10 � Su' c o oth 9 l '� - -� 3 ! Part 3 TYPE F PERMIT part 4 OTHER REVIEWS AND PERMITS � APPLICATION � L� Subdivison ❑ DFW HPA U Shoreline Management ❑ Short Subdivision ❑ COE 404 ❑ Rockery ❑ Grading ❑ DOE Dam Safety ❑ Structural Vaults �Commercial ❑ FEMA Floodplain ❑ Other ❑ Other ❑ COE Wetlands Part 5 SITE COMMUNITYAND DRAINAGE BASIN Community . C i�1 cr� R err�arrt, Drainage Basin Ce dar Ft�ve+r Part 6 SITE CHARACTERISTICS � � River _ Floodplain ❑ Wetlands ❑ Stream ❑ Seeps/Springs ❑ Critical Stream Reach ❑ High Groundwater Table ❑ Depressions/Swales ❑ Groundwater Recharge ❑ Lake ❑ Other ❑ Steep Slopes No Part 7 SOtLS Soil Type Slopes Erosion Potential Erosive Velcoties �rbq�. �tQn d �ur 0••. 3?'o S • N ❑ Additional Sheets Attached Part 8 DEVELOPMENT LIMITATIONS REFERENCE LIMITATIONlSITE CONSTRAINT ❑ Ch.4—Downstream Analvsis I�p ��ery�, C�'Q:�_ � �YY1i'�'C�'t-tov1S .]KL-�j�fQ�_ ❑ a� �h,� s;�e �inc�'r kbuld. ❑ a�� as 4.. con��-ra�r� ❑ ❑ ❑ Additional Sheets Attached � Part 9 ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION AFTER CONSTRUCTION ❑ Sedimentation Facilities � Stabilize Exposed Surface � Stabilized Construction Entrance � Remove and Restore Temporary ESC Facilities � Perimeter Runoff Control � Clean and Remove All Silt and Debris � Clearing and Graing Restrictions ❑ Ensure Operation of Permanent Facilities � Cover Practices ❑ Flag Limits of SAO and open space � Construction Sequence preservation areas ❑ Other ❑ Other Part 10 SURFACE WATER SYSTEM ❑ Grass Lined L� Tank ❑ Infiltration Method of Analysis Channel ❑ Vault ❑ Depression �� Pipe System � Ener Dissa ator ❑ Flow Dis ersal Compensation/Mitigati gy p p on of Eliminated Site ❑ Open Channel Stora e ❑ Wetland ❑ Waiver g Ci Dry Pond N ❑ Stream ❑ Regional ❑ Wet Pond Detention Brief Description of System Operation ReLo c�,�-2 exis�; n 4 c:0.�-R b�S�Y�� \h S�� C U Y�D Qr1 G��'E"�Pf Facility Related Site Limitations Reference Facility Limitation Part 11 STRUCTURAL ANALYSIS Part 12 EASEMENTS/TRACTS ❑ Cast in Place Vault ❑ Drainage Easement ❑ Retaining Wall ❑ Access Easement ❑ Rockery>4' High ❑ Native Growth Protection Easement ❑ Structural on Steep Slope ❑ Tract ❑ Other ❑ Other Part 13 ;SIGNATURE OF PROFESSIONAL ENGWEER I or a civil engineer under my supervision my supervision have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attachments. To the best of my knowledge the information provided here is accurate. � , �� Q �!�� Signed/Date