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HomeMy WebLinkAboutPacket, DRC PLANNER 3/17/2011 CITY OF SPRINGFIELD - D.LOPMENT REVIEW COMMITTEE DISTRIBUTION DATE March 15, 2011 TO: ./ ..,./ ...d' -L ./ ---:/ --;:./' --;:? ~ ./ ..L ;J' v v --;:? 7' V V .JL 1 ~ ~ -;7 V 7' --L =f 7 \7 v =t <Current Planning Staff: G. Kary>, J. Donovan, Liz Miller, M. Metzger, Lissa Davis, L. Pauly, Tara Jones, IAndy Limbird,IDave Reesor, Steve Hopkins, Molly Markarian <Matt Stouder, Engineering - Public Works Department I Brian Barnett, Traffic Engineer/PE, Public Works Department (agenda only 2102) *Michael Liebler, Transportation Planning Engineer, Public Works Department <Gilbert Gordon, Deputy Fire Marshail, Fire & Life Safety Department Melissa Fechtel, Fire Agenda only <Ronni Price, Planner, Willamalane Park and Recreation District <Ed Head, Springfield Utility Board (Electric) . *Tamara Johnson, Springfield Utility Board (Water) <Bart McKee, Water Engineering Supervisor - Springfield Utility Board (Water) Jack Foster, Springfield Utility Board (Energy Conservation) Amy Chinitz, Springfield Utility Board (Drinking Water) <Jim Henry, Central Lane Communications 911 Leo Lambert, US Postal Service <Billy Elder, Northwest Natural Gas (John Radosevich, alternate reviewer) <Phil Fields, Lane County Transportation (Celia Barry & Steve Smith) Thomas Jeffreys, Emerald People's Utility District (EPUD) George Ehlers, Lan<; County Sanitarian [Urban Transition Zone] (if applicable) Jamie Porter, Rainb~w Water District (Dean Hill alternate reviewer) (< only if ili the North $pfld area) Ralph Johnston, Lane Regional Air Pollution Authority (if applicable) Tom Henerty, Comcast Cable (if applicable) Mark Oberle, EWEB (electric) (property) Dick HelgesonlMel Damewood, EWEB (water) (<If in Glenwood) Bill Grile - Development Services Director (agenda) John Tamulonis, Economic & Community Development Manager <Dave Puent, Building Official <Lisa Hopper, Building Services Representative < Greg Ferschweiler, Kellh Miyata, Brian Conlon, PW Dept. <Craig Fitzgerald, Maintenance PW Dept George Walker, Environmental Works Dept., (agenda only) Deanna Buckem, Engineering Assistant, Public Works Dept. Police Chief, Jerry Smllh, Police Department (agenda) <Will Mueller, L TD Norm Palmer, Quest Corporation (agenda <Scott Nelson, Planning & Development Manager, ODOT, State Highway Division Jeff DeFranco, Springfield School District (agenda) William Lewis III, Financial Services, Springfield School District (agenda) Joe Leahy, City Attorney Chris Moorhead, City Surveyor . (agenda) (agenda) .~~ RECEIVED MAR 1 7 2011 By: 1)1<-c. ryCLCkd- ] 0 -f' Ji-+ p1j'5 A request for land use action, as described on the attached agenda, has been receiv~d by the Development Services..... Office. Specific concerns of your division/department/agency should be addressed. If you have comments 'or',' requirements of this proposal, please send them in writing to the assigned planner @ Development Services Department, 225 Fifth Street, Springfi~ld, OR 97477. Your comments may also be sent via e-mail or if you are a DRe 'internal user attach as document within the Accela Automation. If your written comments are not received by Friday, March 25, 2011 specific concerns of your division/department/agency will not be addressed unless you attend the meeting on Mar;ch 29, 2011. The Development Review Committee holds staff review meetings on Tuesday@8:00-10:00a.m.. You shpuld also plan to attend the staff meeting on Tuesday if you have specific concerns so that the Planning representative can discuss them prior to meeting with the applicant. If the Planner feels II is necessary for you to participate in the public meetings he/she will let you know on Tuesday. < full packet . . AGENDA DEVELOPMENT REVIEW COMMITTEE DEVELOPMENT SERVICES DEPARTMEN7i 225 FIFTH STREET . Conference Room 615 Staff Review: March 29,2011 @8:00-10:00a.m. I 1. SUBDIVISION TENTATIVE #TYP211-00004 (PRJ10-00004) HLM; INC 8:00 - 9:00 a.m. Assessor's Map: 18-02-03-33 TL 100 (portion) Address: Vacant - South of Orchid Way Existing Use: Vacant Applicant submitted plans to create a 21-lot LDR SFR subdivision, Jasper Meadows, Phase 10 Planner: Andy Limbird I 2. SITE PLAN TENTATIVE #TYP211-00005 (PRJ10-00002) GLENWOOD OP, LLC 9:00 -10:00 a.m. Assessor's Map: 17-03-34-31 TL 900 Assessor's Map: 17-03-34-34 TL 201 Address: Vacant - 3500 block Franklin Blvd/Glenwood Blvd Existing Use: Vacant Applicant submitted plans to construct a new, approximately 19,000 square foot, 2-story medical office building. Planner: Mark Metzger The ORe informational packet for this meeting is available on-line for you to review or print out @ www.sprinqfield-oLQov/weblink7 1 . . [City of Springfield Development Services Department 225 Fifth Street Springfield, OR 97477 Land Division Tentative Plan Partition, Subdivision SPRINGFIELD ~- A licant Name: Craicr Horrell Com an : Address: HLM, Inc. ~ 2464 SW Glacier PI, Ste 110, Redmond OR 97756 Phone: 541-480-7773 Fax: A licant's Re .. Renee Cloucr , PE, PLS, A1CP Com an : Phone: 541-746-0637 i Fax: 541-746-0389 Address: 3105th S rincrfield OR 97477 r"'0\,?;:i~W:'<>'0;::'i+:f'iiG;+:i':Ari0*""W::":1I'i!"tic;!!;7<:"_';*';;;'~Urei",_ oBi v Com an Address: HLM, Inc. Phone: 541-480-7773 Fax: Owner: 2464 SW Glacier PI, Ste 110, Redmond OR 97756 'Ar:..L0ij0&j&'/l""\iftj;:;tm.'2'\&dmclli1."....:$'j:.~#lh1\0~';.i&lG& TA1~,'\'::.:*4b. :::"W_AM;%l'8;;,U",jUW"G.:;;iA;:"2&W;1_1H":'!1"""'';'M:ffi4i<WL1V'"E0iL".1k''0:kS':;s"--TO::;;>f';"-,~8(,,';;;, ;,,,<+' A"0\)X-~'V;.'..')_iih,;E_A""dH",~~,-;,,1_";:.J.C;'i/\,,ib""_ ASSESSOR'S MAP NO: 18-02-03-33 none 11.63 Acres ~ S uare Feet D Pro osed Name of Subdivision: las er Meadows Phase 10 Description of Pro osal: Existin Use: If you are filling in this form by hand, please attach your proposal description to this application. 21-10t subdivision vacant Av . Lot/Parcel Size: 5100 sf rint our name and date in the a . - . ~... Pre-Sub Case No.: Date: , SOl I ns: 1 Reviewed b J b~ Associated A lications: A ~ /bO TOTAL FEES: $2-<) ;{it,1$i1:5#~it:$~~_,* ~4H*,* Revised 11.19.09 or;~ Qu' 1 of 10 spr_map, Page 1 of 1 TYP211-00004 Sultivision Tent - LOR 18-0!O~-33 TL100 (portion) Jasper Meadows Phase 1 0 (21-lo~ SFRJ 1/ \ r-'\" ~I' "tj be5t'o~~;"" , . \-----If ' < I ~ \__\ ' L, ' , Irl)~' f:~ ' . '\ \ ..-I', :1 puMIGE ,P.l ~ \ " li. l---t l 'I' '~" , Cb '\ " , " , , , ~ '", ,\"" ~~\ ~,,;' ~ "{"~" 1\ ,',', ,,. \ ~! , I, , I c':,.!, ,f. 1 ,j" :1", "J" . ," 'I"" , " " , , .~,'. ;> , '" " ~ .,. !ct\ ~llIj;;l '\. " \\\\ ..,'...~"'. ~i~"i..., ^ ,,~.~ . .\.. . ". -~. :~r} \,;~J).:.:,. .'.'\'.',,? ....'.". '.'...., '.. i, ;~",: """": " !; .:: '~'" Date Received: I , ! MAR - 8 2011 ; , Origin~1 Submittal http:// spifs02 0/mapguide2 009 Imapviewerphp/printablepage. php ?SESS1 ON =d3 fI 703 0- ffff- ffff-80... 3/15/20 I 1 I ;: , f , . ~ a -1--- I ~ , 1 I ~ ~ I ;: I , " I 0 , I 8 I III I'~ ii' Ill; l,j I" d~ 0 ::J. <C :i" 0 !2. en ~ III - <:: m "c- :::a 3 I ;:0 ;:;: m - co r 0 N m <=> ::t - - m a. _ _ -----a s. 57TH ST.ll -.. arl'!MrS.,.. l-~ S. 57TH ST.~i ...or .=) "--;T '. , ~ ',},. ...::~= , ~~ ~ , , " j ....... ;1 I , 1-' , ,r , f i ~ II " " ;1 il ,--;- " ii 't" -, , ~~' i:ii ~i ~~ f ~~~. ~ ii:;. '". bl! ", :l- I :i , ,,~~ ;1 , " ~i " il " ~ , , , '-- ,~ , , , J.-- , , -'- ~ ~ . -'" 'III !I ]~ '1'111 ~ t II c 111111111 mll'lI ji 11!i!!i!~!llH Ii! !'h!ll. , . I III ' I I. .' Ii! T.II.! .... IliP!i!i 1lI1! II!i mi I~ ',1 !/Il Ui!l ! !'/ · ,11"'1 j' I' /,',"11'1,1; 1'111 ! .1/ ,'I, ii j_ , I.. !l. /,' i ~ ~ ~ III I:. /IF-''-'' J: e~ ,L ': (CI.. '--;/lII- _I Ir--~ - ,: ~ ~ , - 1--;;:- 1 ': 'r:i" L_~__' 1---;': -~-, ~: !@'.l. " ~ - " Ii !0 ) i: , ..II :: ~: ~ I: , il: i: , I~ i: , -- -- Ii ~I i' " 1 L if ':1.1 ". . ~if . . . :Q~i' I!. 1'1"' J:;;l,. ~" , . 'ill', ,I l. 'I' ':jll, t ~;i' ~ ~ ... ~~~ '~~i; 'I;' .", ~.II' , I ' "'!' 'Ii~ r." ... . ... ""II ' I'" , . .,'" .... 2-.~ L' ... .J:.--"'--- ~ "'~! n i .~ . @ Branch Engineering, Inc. PROJeCT nru:: 1lEVl~1 NS a I~~; . JASprR MrADOWS om .l"flSOOllDtIl....... ~ . . " - . r 1 PHASE 10 J8th Addffion) . " 0 - ~"-:l. - -- ~~ SPRINGnn , ORrGON " --- _-.,_11I l' i , --~ --- I - JOCSCRIPTlQN, . g g ): "'- ...~ =-~ ~ i ~ ..............~-..-I TENTATIVE UND DIV/S/ON PUN ~ ....._.~._....... ~_...""" MDC'F'NPIIOVAU (Va /::s) sOs ,uiJld EllI I~ ~" I;f! ~~ II '\;\~ ~ . . z-- . . VVRITTENSTATEMENT FOR THE JASPER MEADOWS PHASE 10 , - TENTATIVE SUBDIVISIONAl'PLICATION I . lbis application is a proposal to subdivide the property identified as Phase lOin the Jasper Meadows Master Plim (Tax Map 18-02-03-33, portion of Tax L6t 100) into 21 lots. Currently, the site is vacant with wetlands consuming much of the northern pomon. Two public street rights-of-way are proposed for dedication to the city. In addition~ an emergency vehicle access road is proposed to extend from the cul-de-sac to Bob Straub Parkway with a locked gate at both ends. lbis access road will be paved from the cul-de-sac to the driveway for Lot 10; the surfacing type from the driveway to Bob Straub Parkway has not been determined yet, but will meet or exceed the Fire Department requirement for 80,000-pound load. The tract contaibing the wetlands is to be dedicated to Willamallme concurrent with the plat. At the time of platting, we will coordinate with Willamalane reg~ding the dedication method (on the face of the plat or by separate document). The boundaries of the residential development are laid out to not encroach on the delineated wetlands. I . Construction of the streets and utilities will require some earth,""ork and tree removal. The full extent of these tasks will be determined with the construction plans. With the exception of utility extensions along the east side of the street, no earthwork will occur and no trees will be removed within the wetlands. ' Connections to facilities in the prior phase that were not extended to the phase boundary are the only off-site improvements. The streets, utilities and lots are laid out to match the site contours as well as possible to minimize the earthwork. It is acknowledged that tall retaining walls along the south and north boundaries of the residential lots will be required. Based on the developer's experience and an approximate cost-benefit analysis, it was determined that this layout created lots that are more saleable and cost efficient than alternative designs (such as t~rracirig). Please note that the locations and dimensions of the public improvements, especially utilities, are intended to be approximate. A detailed design will be performed prior to submittal of the Public Improvement Plans. In addition, the street trees shown are solely for the purpose of acknowledging that they will need to be planted. Their actual location will be determined at the time they are installed. . The Lane County Soil Survey shows the site as having Hazelair silty clay loam, 2 to 7 percent slopes (52B) across the wetland portion of the site and Salkum silt loam, 2 to 6 percent slopes (120B) across the portion of the site to be developed. The Soil Sprvey indicates that the seasonal high water table for the Salkum soil is more than 6 feet below the ground surface. . The Survey also indicates there may be problems with low soil strength and ~low drainage in the I Salkum soil. Ho.wever since it provides solutions that are in-line with standard construction practices, no Geotechnical Report was obtained. I A review ofthe Conditions of Approval for the Master Plan (Case Number LRP2004- 00014) did not reveal any conditions that need to be specifically addres~ed by this application. We have not yet been provided with information on the Master Plan Arrlendment Conditions of Approval so cannot address compliance with that planning action. I . lbis subdivision qualifies as a cluster subdivision to accommodate the large wetland I tract. Adjustment to specific dimensional standards is not requested, but the lot layout in the area I of the cul-de-sac is somewhat unique. Specific house plans have not yet been selected for the Date Received: MAR - 8 2011 Original Submittai I - . . lots; at the time of home construction, the developer will ensure that thJy meet the Neighborhood Compatibility and Specific Development Standards in SDC 3.2-230F&G. This phase will have a Homeowner's Association structured like the prior phases. The Homeowner's Association will be responsible for maintenance of the snared, non-public stormwater facilities. A draft of the agreement will be prepared for ci~ review at the time of platting. ~ This project does not require any additional planning applications at this time. It is acknowledged that a Tree Felling Permit and a Land and Drainage Alteration Permit will be required prior to the removal of trees or grading; however, these applications are being deferred to submittal at the time the permits are needed. lo, Date Received: . MAR - 8 2011 Original Submittal . . . RESTRICTION STATEMENT FOR THE TENTATIVE SUBDIVISION APPLICATION , The title report issued by Cascade Title Company on December; 8, 2010 lists eight restrictions as applicable to the lands in this subdivision. The following is a discussion of each of these restrictions: 2. Easement, including the terms and provisions thereof, granted Mountain State Power Company, by instrument recorded September 19, 1945, in Book 297, Page 285, Lane County Oregon Deed Records. This document is like the vast majority of other local Mountain State Power easements; it does not disclose a location. In conformance with standard local practice, this easement will be noted on the subRivision plat, but not viewed as restricting construction on the lots. 3. Easement, including the terms and provisions thereof, granted Mountain States Power Company, by instrument recorded September 18,1947, in Book 343, Page 615, Lane County Oregon Deed Records. This document is like the vast majority of other local Mountain State Power easements; it does not disclose a location. In conformance with standard local practice, this easement will be noted on the subdivision plat, but not viewed as restricting construction on the lots. 4. Easement agreement, including the terms and provisions thereof, between Joseph D. Bando and J.D. Bando Corporation, and Gordon W. Tripp, recorded September 4, 1981, Reel No. 1155, Reception No. 8138188, Lane County Official Records. This document creates a drainage ditch easement across the northern portion of the west line of the parent parcel to this subdivision. The easement-does not extend south to this subdivision. 5. Easements, notes and restrictions shown, set forth or delineated on the recorded partition plat. A review of the partition plat shows that no easements or restrictions beyond those listed. . above existed at the time of partitioning. It was noted that the first ~asement listed in the partition notes (upper left corner of the plat) gives an odd merging of the date and recording information from Exceptions #2 and 3 discussed above. This was reviewed with the title company and determined to be an error on the plat. 6. Resolution Initiating Annexation, including the terms and provisions thereof, by the City of Springfield and recorded September 23, 2003, Reception No. 2003-093155, Lane County Deeds & Records and Annexation Agreement, including the terms and provisions thereof, recorded October 06, 2003, Reception No. 2003-097367, Lane County Deeds and Records. It is our understanding that the Approved Master Plan was prepared to conform to the requirements of these documents. Because this subdivision application conforms to the Approved Master Plan as amended by the City of Springfield, a detdiled analysis of compliance with these documents is not seen as necessary and was hot prepared. : Date Received: I . MAR - 8 2011 Original Submittal . . 7. Agreement for Construction of Public Improvements (Jasper Road ,Extension) and for Dedication of Right of Way to Lane County, including the terms arid provisions thereof, recorded June 25, 2004, Reception No. 2004-048548, Lane countyl' Oregon Deeds and Records. . The Bob Straub Parkway (aka Jasper Road Extension) has been constructed and the right-of way dedicated; therefore a detailed analysis of compliance with this document is not seen as necessary and was not prepared. ' 8. Annexation Agreement, including the terms and provisions thereof; between the City of Springfield and the Crossroads Development, LLC, recorded March 02, 2005, Document No. 2005-014545, Lane County Deeds and Records. It is our understanding that the land could not be annexed without conforming to the requirements ofthi~document. Because the lands are annexed, a detailed analysis of compliance with this document is not seen as necessary and was not prepared. 9. Access Restrictions and relinquishment of all existing, future or potential common law or statutory abutter's easements of access, including the terms and provisions thereof, as set forth in instrument recorded July 18,2007, Reception No. 2007-048812, Lane County Deeds and Records. RLID did not make a full copy of this document available; however;based on general knowledge of the property and information available from other sources, it is known that the . document places limitations on access from the property directly to Bob Straub Parkway. At the time this document was prepared it was expected that Quartz Avenue would be dedicated along the south property line providing a centralized access point for traffic from this subdivision and surroundinff properties. Quartz Avenue was also to provide a utility corridor between South 57' Street and Bob Straub Parkway. Since this document was recorded, the city has decided to 'move the intended intersection approximately 600 feet south. This had the spin-off effect of making it difficult for this subdivision to accomplish street connectivity, emergency vehicle turnaround and utility connection design criteria. The solution selected was to use a cul-de-sac street with a limited use connection through to Bob _ Straub. This limited use connection will provide the utility corridor and meet emergency vehicle needs. The connection will'be gated at both ends to prevent use by anyone except utility maintenance personnel (including the city and public utility stafJ) and emergency vehicles. Use of this connection will be rare and not by the general public so is seen.as in compliance with the intent of the recorded document. To meet the City's length requirements for dead-end streets andfire code requirements for turnarounds without this connection would severely reduce the subdivision's density. . Date Received: MAR - a 2011 Original Submittal . . Branch Engineeringl . . - .. ... Inc. 'l:Otl>oral:eHeadquarte... (541) 746-0637 310 5" Street SPri"gfieJd: OR 97477 Salem Engl"eerlng Ofllce (503)779-251"7 4310 CherrY Avenue NE Keizer. OR 97303 PrinCipal. fo.1.lane Branch. PE Damien Gilbert. PE Renee Qough. PE. PlS. AICP .Rene' Fabricant. PE. SE Rol'leld J: Demel<, PE www.BmichEl.lglne.rlng.com February 24,2011 Andy Limbird . City of Springfield 225 Fifth St. '" Springfield OR 97477 Dear Andy, This is a complete submittal for the Jasper Meadows Phase 10 tentativeisubdivision application. A pre-submittal meeting was held at 11:00 on Tuesday, December 21', 2010. The items deemed incomplete at the meeting have been addressed as follows: FIRE AND LIFE SAFETY (Gilbert Gordon via AI Gerard) Provide "No Parking-Fire Lane" signs or curb markings (red striping with white letters or yellow striping with black letters) on one side of Quartz Avenue and both sides of the fire apparatus access road from the cul-de-sac bulb to Bob Straub Parkway per 2010 Springfield Fire Code 503.2.1,503.3 and SFC Appendix D 103.6. ' The developer prefers to install signs instead of curb markings. A note has been added to the plans ach10wledging that the signs will need to be included in the PIP. In addition to the written comment about the locks, it is acknowledged that there was also a verbal discussion that the gates need to be designed with an effort at discouraging ped~strian use. Provide Public Works locks on the proposed manual gates on the fire apparatus access road. pvt. _ - locks can be obtained from Heyman's Lock, Safe and Security at 131 14th Street in Springfield (phone: 541-747-6713). Thank you for providing information on how to obtain the locks. Installation of the locks will be included in the PIP. TRANSPORTATION (Michael Liebler) Existing drawings are in compliance with minimum street depth to the cul-de-sac. Given that secondary emergency access will be provided to the-{;ul-de-sac, the maximum street length of 400 feet may be extended to more efficiently utilize the developable area. We appreciate the city's willingness to propose flexibility to make a property more developable. Several other street and lot layout options were reviewed and determined to not be enough improvement in salability to justifY a change in design at this stage. Date Received: MAR -8 2011 CIViL . STRUCTURES TRANSPORTATION Oriainal Submittal GEOTECHNICAL" - SURVEYING . . . I I I Various street trees located on the plans are too close to the street lightfug according to Springfield Engineering Design Standard 6.02.4. Street tree clearances will need to comply , with this code. . . The street trees shown on the plan are a conceptualization to acknowledge tha~ they will need to be installed in the fUture. At the time they are installed, a final location will be sezected that meets the applicable design criteria. The Written Statement has, been revised to more clearly reflect this. A traffic impact study will not be required for this development. Thank you for the confirmation. PUBLIC woRKs ENGINEERING (Clayton McEachern) 1. Transformers and mailboxes not shown. If neighborhood mailboxes ,are not required for this development please hate. The transformer design (sizing and placement) will be performed by EPUD, the electric provider, at the time of PIP preparation. A note has been added to the plans to note that selection of a neighborhood mailbox location(s) will be coordinated with USPS at the time of PIP preparation. 2. No planting plan included for detention ponds. . A note has been added to the plans stating that the planting plan will be designed as part of the PIP and will conform with City of Springfield design criteria. I Paving along the frontage for Lot 10 will need to be extended past that lot's driveway. The developer agrees that the shared access should be paved to at least the driveway for Lot 10. It is understood that this driveway will need to be constructed (ihcluding paving) prior to completion of the subdivision. A PIP will be required for constructed S 57th St, Quartz and all associated utilities. This will include the emergency access road to Bob Straub. Thank you for ensuring the design team is aware of this requirement. An LDAP will be required before any grading is started for Phase 10. Thankyoufor ensuring the design team is aware of this requirement. As mentioned in the pre-submittal meeting, the developer is considering utilizing a mass grading process similar to that used at Westwind Estates. It is acknowledged that in addition to the written comments, I Kip Kauftnanfrom the Building Department made a verbal statement expressing his need to be involved with the grading and special inspection process. I A detailed maintenance agreement for the detention ponds will be requITed. A detailed maintenance plan will be prepared and submitted with the design information produced during the PIP process. At the time of platting a Home Owner's Association will be created and tasked with ensuring maintenance of the detention ponds. The Written Statement has been expanded to discuss the Home Owner's Association. Date Received: MAR -:- 8 2011 I Original Submittal . . As part of the planting plan provide a note stating that all detention basins must be protected from compaction during construction and/or have all compaction due to construction activities removed. The construction plans will reflect this construction requirement. Quartz A venue will probably need to be changed to Quartz (...) to reflect that it is a cul-de-sac and not a through street. The plans reflect the street name change. PLANNING (Andy Limbird) 1. Name of the east-west public street serving Phase 10 cannot be "Quartz Avenue" in accordance with adopted Lane County road naming guidelines. An alternative name must be selected that meets the naming guidelines. The developer has rt!>llised the street name to Basalt Court. 2. Show the location of required traffic control signage including stop or yield-controlled intersections and vehicle barricades/warnings. The plans show a stop sign/street name sign combination at the northeast corner of Basalt Court and South 57th St. A barricade has been added to the south end of South 5ih St. 3. Please show the size and location of proposed water mains, including the connection with the proposed fire hydrant. To avoid cluttering the drawing, one line was shown for the joint utility trench with a call-out in the legend regarding which utilities will be in the trench - this includes the water main. SUB is responsible for sizing the new line at the time of PIP preparation; therefore no size is included on our plans at this time. The new line is proving a looped connection between an existing 12" line and an existing 16" line so it is assumed thatthe new line will be between these two diameters. The city is undertaking a concurrent Jasper Meadows Master Plan amendment for relocating the "Quartz Avenue" intersection, which is a necessary prerequisite before the proposed Phase 1 0 subdivision can be platted. ',,- It is understood that this subdivision cannot be completed prior to completion of the Master Plan Amendment. Provide Knox boxes and/or Public Works locks on the gated emergency access road. At the time o/public improvement design selection of the lock will bel' coordinated with Clay ton "McEachern and Gilbert Gordon. Staff does not support installation of an 8 to I O-foot high retaining wall ,along the rear of Lots 10- 21. Slope-adaptive housing is recommended for these lots. The developer appreciates the city's suggestions and has taken them into consideration. A discussion of this topic has been added to the Written Statement. The proposed 4- foot high retaining wall on Lots 1-9 will likely require an engineered design. Date Received: MAR - 8 2011 Original Submittal . . The design of the retaining walls will be addressed prior to submittal for an LDAP or mass grading permit. The face of the proposed 4- foot retaining wall on Lots 1-9 must be loca1ed at least two-feet inside the property lines and not require maintenance access onto or Vrrough Tracts A, B or C. Additionally, disturbance caused by construction and instillation of tpe retaining wall shall not encroach within the adjacent regulated wetlands unless proper mitigation measures are implemented. These requirements will be addressed at the time of wall design. ! The applicant shall verify the status of wetland mitigation measures for the Jasper Meadows neighborhood. If completed, Tract A shall be partitioned from the developable remainder on the east side of Bob Straub Parkway (phase 9) and dedicated to Willamalane prior to or . concurrent with the Jhase 10 subdivision (ref. Jasper Meadows Master Plan approval condition #20). . The Written Statement now includes a discussion regarding the dedir;ation of the wetland tract to Willamalane. Emergency access driveway connection to Bob Straub Parkway will require a Lane County Facility Permit or an acceptable written authorization. The city has previously indicated that they accept responsibility for obtaining Lane County's approval of the change. It is our understanding that Ken Vogeney and Joe Leahy have made progress on this since the Pre-Submittal Meeting. All utilities installed to serve the subdivision shall be placed underground. This is reflected on the plans and the PIP will conform. A Tree Felling Permit will be required for the proposed removal of trees within the project area. This will be applied for prior to tree removal. The subdivision proposal shall meet the cluster development standards ofSDC 3.2-230. A discussion of the cluster development standards has been added to 'the Written Statement. . . Please feel free to contact me at 746-0637 if you or anyone else has any questions. . I I . Smcere. '. I i enee Clough, PE, PLS, AICP Principal Surveyor Branch Engineering Date Received: MAR -8 2011 Original Submittal . . r" t . -.."..",..,.' STORMWATER MANAGEMENT 'PLAN AND DRAINAGE STUDY \ FOR Jasper Meadows Phase 10 \\, Springfield, OR November 29, 2010 Prepared For: HLM Inc. 2464 SW Glacier Place, # 110 Redmond, OR 97756 .._---. Branch Engineering, Inc. 310 5th Street Springfield, OR 97477 Phone (54]) 746-0637 Fax (541) 746-0389 ',,----, -"".~,;,.,.. Branch Project # 10-198 Date Received: MAR - 8 2011 Original Submittal . . PUBLIC WORKS DEPARTMENT / Engineering Division Fax: (541) 736-]021 STORMW A TER MANAGEMENT SYSTEM StOPE OF WORK . . · ..... . .','-- (Ai:iabeJow this liliejfJieii O<lt biAppii~iI;'t)~:':.-:,' .', .... . . '(Please 'retll1-n t~ MatlSto<lder@ Ciiy4SpfmgjudtiPublip Works Engineering/tax, #736-1021, Phon'e # 736-1035.)' .. .. -. . -.' ..".. - ...". - . .' .' .' Project Name: Jasper Meadows Phase 10 AssessorsParceI#: 18-02-03-33 TL 100 Land Use(s): Sin!(le Family Residential and wetland Project Size (Acres): 3.79 ApproL Impervious Area: 2,46 Applicant: Date: Phoue #: Fax#: Email: Greg M6wer ]]/17/2010 54]-746-0637 541-746-0389 ~gm~~r~~hengin~ering.com . Project Description (Inelu a copy of Assessor's map): 21-lot subdivision Drainage Proposal (Public connection(s), discharge Jocation(s), etc. Attach additional sheet(s) if necessary: Retrofit an existing detention pond from Addition 6 & 7 to over detain storm runoff and ano\" the proposed Phase 1 0 to be released undetained, Discharge would be to existing wetfands north of she. Proposed Stormwater Best Management Practices: Grassy S\vale . '.' . (Area bd~ this ifuerllleti outhvthe Citv fInd Reiurnetit~ti,eAl1iilic;;'t) ~ .'. . (AI a minimum. all boxes ch~,!r,ed bylhe Ci/jJon !~efto17t ~i:Idba2kofJh,4 sh~ets/:z.all b,esub,mitted. ". for an application ,tabe comptete for s~brriiit"l. olihough oth& I'equirerizerts May b.e nei:~s.~ciry) . ~ Small Site Study - (use Rational Method for calculations) ljl Mid-Level Development Study - (use Unit Hydrograph Method for calculations) o Full Drainage Development Study- (use Unit Hydrograph Method for calculations) Environmental Considerations: &!I Wellhead Zone: N/A m Hillside -1\ ~ WetJandJRiparian: ?~""', tat..,,"" ~ w . ~r ~ Floodway/FloodpJain: N GJ SoilType: 4'!, L - 0 i """"VI'l' r. - P4,\'...J1.:: @ Other Jurisdictions: L.-........ Go. Downstream Analysis: 4...~-A: r Date Received: ~ o o o , SPM Section 4.03.2: ote VB ma be substitUted for Rational Method N/A Flow line for starting water surface elevation: Design HGL to use for starting water surface elevation: Manhole/Junction to talee analysis to: 2011 Return to J\olatt Stouder le1d, email: mstouder 0. igiRa\ Sllbmittal field_or.us, FAX: 541 736-1021 . . .'".' .,. CO:M:PLETE STUDY ITEMS Fm9ffidalliseOnly t-!\ft S : * Based upon the informaJiol1 provided on the frOnI of this sheer, the following represents a minimum of what is needed for an application to be complelejorsubmitta! with respect to drainage~. however, this list should not be used in1ieu of the Springfield Development Code (SDC) or. the City's Engineering Design Manual. Compliance with these "requirements does not constitute site approval,- Additional site specific information may be required Note: Upon scoping sheet sz~bm'ittal, ensure completedfarm has been oS igned in the space provided below: . ~ 0 00 0 ~D Interim Design StandardslWater Quality (EDSPM Chapter 3) I ~~~ . i rpi 0 An non-building rooftop (NBR) impervious surfaces shall be pre-treated (e.g. multi-chambered catch basin w/oi] filtration media) for stormwater quality. Additionally, a minimum of 50% of the NBR impervious surface shaIl be treated by vegetated methods. . I Where required, vegetative stormwater design shall be cons;stent with 'interim desig" standards (EDSPM Section 3.02), set forth by the Bureau of Environmental Services (BES) or Clean Water Services (CWS). For new NBR impervious area less than] 5,000 square feet, a simplified design approach may be followed as specified by the BES for vegetative treatment. If a storrnwater treatmen~swale [s proposed7 submit calculations/specifications for sizing, velocity, flow, side slopes~ bottom slope, and seed mix consistent with either BES or CWS requirements. : o Water Quality calculations as required in Section 3.03.1 of the EDSPM . ~ AH building rooftop mounted equipment, or other Fluid containing equipment JDcat~d outside of the building, shall be provided with secondary containment or weather resistant enclosure. ' g General Study Requirements (EDSPM Sectiou 4.03) i!l.iI 0 Drainage study prepared by a Professional Civil Engineer licensed in the state of Oregon. . 8 0 A complete drainage study, as required in EDSPM Section 4.03.1, including a hydrp]ogical study map. t2l1 0 Calculations showing system capacity for a 2-year stonn event and overflow effects of a 25-year stam1 event. ~ 0 The time of concentration (Tc) shall be determined using a 10 minute start time for developed basins. Review of Downstream System (EDSPM Section 4.03.4.C) . : o ~ A downstream drainage analysis as desCTIoed in EDSPM Section 4.03.4.C. On-siteidrainage shaIl be governed by the Oregon Plumbing Specialty Code (OPSe). . . o W Elevations ofthe HGL and flow lines for both city and private systems where applicab]e. Design of Storm Systems (EDSPM Sectiou.4.04) . ~ 0 Flow lines, slopes, rim elevations, pipe type and sizes clearly indicated on tl1e plan set. 8 0 Minimum pipe cover shall be 18 inches for reinforced pipe and 36 inches fOT plain qoncrete and plastic pipe materials, or proper engineering calcu]ations shall be provided when less. The cover shall be ~fficient to support an 80,OQO Il? load without failure of the pipe structure. .. . .... .c. ~ 0 Manning's "n" values for pipes shall be consistent with Table 4-] of the EDSP. AI1'storm pipes shall be designed t~ achieve a minimum velocity of three (3) feet per second at 0.5 pipe full based on Table 4-1 as well. OtherlMisc I ~ 0 Existing and proposed contours, located at one foot interval. Include spot elevatlo~s and site grades showing how site dr~ins _ I B 0 Pnvate stormwater easements shall be clearly depicted on plans when pnvate stormwater flows from one property to another . I . o ~ Drywells shall not receive runoff from any surface w/o being treated by one or more, BMPs, with the exception of residential building roofs (EDSP Section 3.03.4.A). Additional provisions apply to this as required by the DEQ. Refer to the website: www.deo.state.oT.us/wq/e:roundwaluichome.hcm for mare informati9n. tliJ 0 Detention ponds shall be designed to limit runoff to pre-development rates for the 2 :through 25-year stom1 events *Thisform shall be included as an,. attachment, Inside the front cover, of the stonnwater study - ~ A1\o bJLU,V'/N * IMPORTANT: ENGINEER PLEASE REAl) BELOW AND SIGN! As the engineer of record. I hereby certify the above required items are:complete and included-with the submitted stormwater study and plan ser. .': Date Received: Signature: Date: 1<<R - 820ft Original Submittal . . Stonn Drainage Evaluation Jasper Meadows Phase 10 Introduction TIris evaluation was prepared to summarize the drainage system proposed for the Jasper Meadows Phase 10 development. This storm drainage evaluation includes stormwateT quality, stOllIJ.water quantity and detention calculations. Culvert sizing calculations are also inciuded. I E:rlsting Conditions , The development site is located south of Jasper Meadows Phase 6 &7 on th~ east side of the extension ofS. 57111 Street in Springfield, Oregon. The proposed site has an area of3.80 acres. The site is . currently undeveloped with vegetative cover consisting of trees, grass and ~lackberry patches. The site generally drains from south to the north with slopes ranging from 3 -1 0 percent. The site drains toward the existing wetlands to the north. ' According to the Soils S~ev of Lane County. Orell:on. by the Natural Resource Conservation Service, the soil at the site is Dixonville-Philomath-Hazeleair Complex (Soil Numbdr. 43C, Hydrologic Group: C). Proposed Site Conditions The proposed site will have a public road with a cul-de-sac at the end with a gravel emergency vehicle route. 21 lots are proposed for this development. South 57th Street will be extended to the south boundary of the proposed development. Culverts will be placed under the extension of South 57th Street to provide an outlet for a large drainage basin consisting ofwetlands'i Two detention ponds are proposed for the site to match the pre-developed runoff rates. : Storm water Quality and Quantity Existinll: Conditions , Storm water detention is proposed for the Jasper Meadows Phase 10 develoPment to reduce peak discharge rates to pre-development levels. Existing conditions peak runoff rates for the 2-year through the 25-year storm events were generated for Jasper Meadows Phase 1 O. P~ discharge rates for the pre-development conditions were generated using the Santa Barbara Unit Hydrograph method. The King County Department of Public Works, Surface Water Management Division, Hydrographs Programs, Version 4.21B computer program was used to assist in the hydrologic and hydraulic calculations. i The peak discharge, rates from the existing site are summarized below. CoJplete calculations are included in Appendix A. Existing Conditions Peak Discharll:e Rates (cfs) 2 Year (3.3 inchesl24 bours) .0.74 5 Year <3.8 inchesl24 hours) 1.07 10 Year (4.3 inches/24hours) 1.42 25 Year (4.8 inches/24 hours) 1.79 The listed existing conditions peak discharge rates were used as the maximUm allowable peak discharge rates for the post development conditions. Date Received; MAR - 8 2011 " Original Submittal . . Storm Drainage Evaluation Jasper Meadows Phase 10 PropOsed Conditions The proposed site is broken up into three basins. Basin A includes lots 9-13 and the gravel emergency vehicle roadway. Basin A has a detention pond located near lot 9. Basin Biincludes the proposed public road, a portion of the South 57lh Street extension and lots 1-8 and 14!.2l. Basin A has a detention pond located north oflots 1-3. Basin C is the remainder ofSouthl571h Street that cannot drain to the proposed detention pond north of lots 1-3. Basin C will be released undetained. , Peak discharge rates for the post development conditions were generated using the Santa Barbara Unit Hydrograph method. The King County Department of Public Works, Smface Water Management Division, Hydrographs Programs, Version 42lB computer program was used to assist in the hydrologic and hydraulic calculations. The water quality rates ~ the peak discharge rates from the proposed site are summarized below. Complete calculations are mcluded in Appendix B. ' PropOsed Conditions Peak Dischame Rates (ciS) Storm Basin A Basin B Basin C WO (0.83 inchesl24 hours) 0.10 028 0.03 2 Year (3.3 inchesl24 hours) 0.54 1.53 0.13 5 Year (3.8 inchesl24 hours) 0.64 1.82 ,0.15 10 Year (4.3 inchesl24 hours) 0.75 2.12 ,0.17 25 Year (4.8 inchesl24 hours) 0.85 2.43 '020 Proposed Detention System Basin A Detention Pond The detention poud for Basin A has 3: I side slope on the side near the gravel emergency vehicle roadway for ease of maintenance. The other three sides will have retaining walls. The pond is planned to have two feet of storage and I foot offreeboard. The pond bottom is at 532.00. The top of the pond is at 534.00. The outlet will have a 2 7'." diameter orifice at elevation 532.00 and an overflow set at"" . 534.00. Basin A detention pond is approximately 3,200 cubic feet of storage. A small berm in the bottom of the pond creates a channel for the water quality storm. The channel is graded toward the outlet at 0.5% and is long enough to provide for a nine minute time of residency which is the minimum for water quality. The pond Will be landscaped in accordance with the City; of Springfield requirements. See Appendix C for Basin A water quality calculations. The Basin A detention pond is characterized in a spieadsheet to be used with the King County Department of Public Works, Smface Water Management Division, Hydrographs Programs, Version 421 B computer program for routing the developed storm through the detention pond. The routing data can be found in Appendix D as well as the detained flow rates from Basin A. Date Received: MAR - 8 2011 Original Submittal . . Stann Drainage Evaluation Jasper Meadows Phase 10 Below is a summary of the detained flow rates from the Basin A detention Pond. PropOsed Basin A Detained Discharge Rates (cfs) , Storm Discharge (cfs) Water Elevation (feet) 2 Year (3.3 inchesl24 hours) 0.14 533.11 5 Year (3.8 inchesl24 homs) 0.16 533.38 10 Year (4.3 inchesl24 hoUrs) 0.18 533.66 , 25 Year (4.8 inchesl24 hours) 0.19 533.99 Basin B Detention Pond The detention pond for Basin B has 3: I side slopes on the west and north sides. The other side will have a rernining wall. The pond is planned to have two feet of storage and I foot of freeboard. The pond bottom is at523.00.~The top of the pond is at 525.00. The outlet will ,have a4 1/4" diameter orifice at elevation 523.00 and an overflow set at 525.00. Basin B detentiori pond is approximately 6,400 cubic feet of storage. A small berm in the bottom of the pond creates:achannel for the water quality storm. The channel is graded toward the outlet at 0.5% and is long ?1ough to provide for a nine minute time of residency which is the minimum for water quality. Th~ pond will be landscaped in accordance with the City of Springfield requirements. See Appendix C for Basin B water quality . calculations. . , I The Basin B detention pond is characterized in a spreadsheet to be used with the King County Department of Public Works, Surface Water Management Division, Hydrographs Programs, Version 4.2IB computer program for routing the developed storm through the detention pond. The routing data can be found in Appendix D as well as the detained flow rates from Basin B. Below is a summary of the detained flow rates from the Basin B detention pond. Prooosed Basin B Detained Discharge Rates (cfs) Storm Discharge (cfs) ( Water Elevation (feet) 2 Year 0.3 inches/24 hours) 0.54 524.19 5 Year (3.8 inches/24 homs) 0.59 524.47 10 Year (4.3 inches/24 hours) 0.65 524.76 , 25 Year (4.8 inchesl24 hours) 0.82 525.03 Basin C will be released undetained. Date Received: MAR - 8. 2011 Original Submittal I I . . Storm Drainage Evaluation Jasper Meadows Phase to The hydrographs from all three basins will be added to determine the total release mte for the developed site. The detained release rates from Basin A and Basin B plus the undetained release rates from Basin C shall not exceed the predeveloped release rates. See AppendiX D for calculations for adding the hydrographs. Below is a summary of the developed release rates and the pre-developed release rates. . I ! Pre-developed and Developed Dischar e Rates (cfs) I StoIDl Pre-developed Developed Difference 2 Year (33 inchesl24 hours) 0.74 0.73 0.01 5 Year (3.8 inchesl24 hours) 1.07 0.80 027 10 Year (43 inchesl24 hours) 1.42 0.88 0.54 25 Year (4.8 inchesl24 hours) 1.79 l.05 0.74 As shown in the table abo~e, the developed runoff rates are equal or less than the predeveloped runoff rates. Date Received: MAR - 8 2011 Original Submittal . . Storm Drainage Evaluation Jasper Meadows Phase 10 Off-Site Storm Water and Culvert Sizinl!: lli . . South 57 Street wlll need to be extended to provide access to the proposed Jasper Meadows Phase] O. As shown on the off-site drainage basin figure, runoff from offsite areas drain toward the South 57th Street extension. Culverts are proposed at this lQCation'l ' Culvert sizing calculations were performed to determine the size and quantity of the proposed culvert under South 571h Street. This culvert pipe will convey runoff from appro~ely 53 acres of undeveloped land east ofWeyerhaeuser Haul Road, 45.5 acres between the Weyerhauser haul road and Bob Straub Parkway and 45.7 acres between Bob Straub Parkway and South 57t!1 Street. The total acreage of property draining to this pipe is 144 acres. It has been a consisteht requirement in this area for each new development to provide stormwater detention. As a conservati~e estimate, the culvert sizing calcUlations are based on the entire upstream tnoutary area being fullt developed with no detention, a travel time of zero w1ll be assumed when adding hydrograpbs m?-d based on the following hydrologic assumptions: " I Basin A Basin B Basin C Basin D Basin E BasinF Future Use Residential Residential Residential Residential Residential Residential Total Area (ac) 22.3 152 21.8 30.6 30.3 23.9 % ImnPnnous 40 60 70 40 60 70 Imnervious Area (ad 8.9 9.1 15.3 122 182 16.7 Pervious Area (ac) 13.4 6.1 ' 65 18.4 12.1 72 CN Im--;:;e;:vfous 98 98 98 98 98 98 eN Pervious 80 80 80 80 80 80 Tconcentration (min) 20 10 10 20 10 10 The King County Department of Public Works, Surface Water Management Division, Hydrograpbs Programs, Version 4.21B computer program was used to assist in the hydrologic and hydraulic calculations. I I The total runoff expected at the proposed South 571h Street culvert crossing is 133 cubic feet per second., ,I Culvert sizing was performed using the Culvert Design Sheet from the Oregon Department of Transportation Highway Division Hydraulics Manual published by ODOT, 2005 (see Appendix F for Culvert Design Sheet and other information used for sizing). Basin lbmoft' Basin A 17.00 Basin B 15.08 Basin C '22.67 Basin D 2332 Basin E 30.09 Basin F 24.82 Total Runoff 132.98 ' The results indicate two 4 'x6' box culverts laid side by side with the bottom two feet buried cao convey the design flow with minimal surcharging at the entrance. Date Received: , MAR - 8, 2011 Original Submittal I . . Stonn Drainage Evaluation "Jasper Meadows Phase 10 Appendix A i Existing Conditions Map and Peak Rimoff Calculations ., Date Received: MAR - 8 2011 ; Original Submittal I ~~ . ci 8~ f .. ,5 "'~ ,~ ~ ;; I~ I <::) ~Q . ! 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' , ' . ~r:~~. \ , j \ '\ ~"} 1 l~'l'\ , ~.~-~..."".. . ~ ~ '11: 1 ',','. ,.,','.>~\ \ I~; I I """'/~~" <-~.- 1 ;11 -1H' t I - ' . "'.1'-,~. \\\~\" 1 11" .~ I'" ,;.,,-r--/ . /--"~\3 '\ ~ :' ,..). ,,) I /' ~ /' -.-- .'!-. \~. 1 I 1":~ i I I Date Rec ved: .., ) -- -".... I '".IS' 1U,tg os 1". I ./ L - - -[-~-- ~ ~--- " MAR - 8 11 , , . . I' Original SIIb *~~~""'.""""'~IA_ __.... . . I. Stann Drainage Evaluation Jasper Meadows Phase 10 Pre-develoned 2 Year Storm ~*************..**~* S.C.S. TYPE-IA **..***** 2-YEAR 24-HOOR STORM DISTRIBUTION *******+*********** **** 3.30. TOTAL PRECIP. ******* ENTER: A (PERV) ~ CN(PERV) ~ A (IMPERV) " CNfIMPERV)" 'rC FOR BASIN NO~ 1 3.8.14,0,,98,13 DATA PRINT-ouT: AREA IACRES) 3.8 PJWC-,2(CFSI . .74 PERVIOUS A CN 3.B 74.0 T-PEAKIRRS) 7.B3 IMPERVIOOS A CN .0 98.0 'Ie (MINuTES) 13.0 VOL lCU-IT) 15196 ENTER Cd:] {path] filename (.ext] FOR STORAGE OF COMPUTED HYDROGRAPH: 10198-2.PRE Pre-develoned 5 Year Storm .*.***************** S.C.S\ TYPE-LA ....**... S-YEAR 24-HOUR STORM DISTRIBUTION ******************* **** 3.80. TOTAL PRECIP. ******* ENTER: A (PERV) " CN{PERV)" A(IMPERV}" CN(INPERV). TC FOR BASIN NO. 1 3.8.74,0.98,13 DATA PRINT-OUT: AREA (ACRES) 3.8 l'BAK-,2 ICFSI 1.Q7 PERVIOUS A CN 3.8 74.0 T-PEAK(HRSl 1.83 IMPERVIOUS A CN .0 98.0 TC (MINU"fES) 13.0 VOL leU-IT) 19918 ENTER (d:) [path]filename[.ext] FOR STORAGE o~ COMPCTED HYDRQGRAPH: l0198-S.DEV Pre-develoDed 10 Year Storm ~~~.***t*'****~**.** s.c.s. TYPE-lA *******+* IO-YEAR 24-HOUR STORM DISTRIBUTION ******************* **** 4.3D" TOTAL PRECIP. ******* ENTER: A(PERVI. CN(PERV), A(IMPERV), CN(IMPERV), TC FOR BASIN NO. 1 3.8,74,0.98.13 DATA PRIN'l'-OOT: AREA (ACRESl 3.8 .l'BAK-,2 (CFSI ~.42 PERVIOUS A CN 3.8 74.0 T-PEAKIHIlS) 7.83 IMPERVIOUS A CN .0 98.0 TC{MINUTES) 13.0 VOL (CO-IT) 25056 ENTER Cd:] [path]filename(.ext] FOR STORAGE OF COMPUTED HYDROGRAPH: 1019B-IO.PRE Pre-develoned 25 Year Storm **~..*****.*...***.. s.c.s~ TYPE-lA ***.*.*** 2S-YEAR 24~HOUR STORM DISTRIBUTION ******************** **** 4.80" TOTAL PRECIP~ *.*..*** ENTER: A(PERV), CN(PERV), A(IMPERV), CN(IMPERVl, TC FOR BASIN NO. 1 3.8,74,0.98.13 DATA PRINT-QOT: AREA (ACRES) 3.8 PEAl< -,2 ICJrS I 1.79 PERVIOUS A CN 3.8 74.0 T-PEAK(HRS) 7.83 IMPERVIOUS A CN .0 98.0 TC lllINOTESl 13.0 VOL (CO-iT) 30373 ENTER Cd:] [path] filename [". ext] FOR STORAGE OF COMPUTED HYDROGRAPH: 1019B-25.PRE , Date Received: MAR - 8 2011 Original Submittal . . Storm Drainage Evaluation Jasper Meadows Phase 10 Appendix B Proposed Drainage Basin Map and Peak Runoff:Calculations I " Date Received: . MAR - 8 2011 I Original Submittal I ':l~ :;,; :::!lO Cc :;,;t:::jC~<::' tiJ~""'C""~ iXlSl~ ,<'i]i' l'il CI) ~~~ ~~~~!il~ ~~~~~~ J:::l tr.l a.. J:::l :"l: '" "":i c C N ~L t: ~ ~ '" 0 " c ~ 0 tJ l:l . g 2 ~ ~ ~ " 0 S,l I I I ~ I ~ I I I I I I I """" *~ ~". '" " '" !l, ~ c 0 l!lil <i .:: ~ ~ I' ~ j . 6 d ;;;. :;.4 ~~ H H ~~ ;j =! . c c !! .~ u o. s;!!; ~~~t ~",I!- I;O;ls;i! ~ i;i a g: ... -E ., ., " .. ~ "" " " .. ... "" ~ l!, ",::9-:;'" ~~j:, :a:!i ~ ~ )lOll sTfl11l1l pXlIY (".,.. Jl/Vl ., ",- / ,-" / t , .;,,- ~ ..- / ..".. Date Ree ved: . . . Storm Drainage Evaluation Jasper Meadows Phase 10 Basin A - Water QuaJitv Storm ~.*~~**~*.*~*.***.*. s.c.s. TYFE-IA.DISTRIBUTION .****************** *******~. I-YEAR 24-ROUR STORM *~** .83- TOTAL PRECIP. ******* ENTER: A (PERV) . CN{PERV). A(IHPERV). CN(IMPERV). TC FOR BASIN NO. 1 0.33.14.0.61,98,10 DATA PRINT-OUT: AREA (ACRES) PERVIOUS A eN .9 .3 7~.0 IMPERVIOUS TC (MINUTES) A CN .6 98.0 10.0 PlWt-Q(CFSI .10 t"-PEAK(H!tSJ 7.83 VOL CCU-FT) 1392 ENTER [d:] [path]filenamet.ext] FOR STORAGE. OF COMPUTED HYDROGRAPH: 198-llQ1L !lEV Basin A - 2 Year Storm **~*******..~******* s_c.~. TYPE-IA DISTRIBUTION **~**************** *******~* 2-YEAR 24-HOUR STORM **** 3.30. TOTAL PRECIP. ******* ENl'SR: A(PERV). CN'{PERV). A(IMPERV). CN(IMPERV). TC FOR BASIN NO. 1 0.33,74,0.61,98,10 DATA PRIN'T-GUT: AREA (ACRES l PERVIOUS IMPERVIOUS TC (l!INllTES l A CN A CN .9 .3 74.0 .6 98.0 10.0 PIWt-Q ICFSI T-PEAKlllRS) VOL (CO-IT) .54 7.83 8109 ENTER Cd:] [path]filenamt:!l.eJCtl FOR STORAGE OF COHPO'I'ED HYDROGRAPH: 198-2A.DEV Basin A - 5 Year Storm ...~**~************* s.t.s. TYPE-LA DISTRIBUTION ****T~****.*****.** ****.**** S-YEAR 24-ROUR STORM **** 3.80. TOTAL PRECIP. ******* ENTER: A(PERV}. CN(PERV). A{I:!WERV), CN{IMPERV>. TC FOR BASIN NO. 1 0.33.14.0.61.98.10 DATA PRIliT-QOT: AREA (ACRES) PERVIOUS A CN .9 .3 7~.0 IMPERVIOUS TC(MINUTES) A CN .6 98.0 10.0 PmUt-g (ars) .64 T-PEAK(HRsl 7.83 VOL CCU-;-FT) 962a ENTER (d:J lpathJ filename [.ext] FOR STORAGE OF COMPUTED HYDROGRAPH: 198-SA.OEV I I Date Received: MAR - 8 2011 Original Submittal . . Basin A Stonn Drainage Evaluation Jasper Meadows Phase 10 Basin A has a water quality flow rate of 0.10 cfs. A six inch high berm in ~e bottom of the pond will create a treatment swale which will be designed to lengthen the flow path of the water quality storm to allow for sediments to settle and increase contact time with vegetation for rJmoval of pollutants. The treatment swale in the bottom of the pond will have a bottom width of 1 0 f~t with 2: 1 side slopes and graded at a Y:. percent slope to the outlet. The velocity of the stormwater is shown below. I , ~~~ ~~M(fJ~~~~~~~r~~~~'t:~1{jT;': .'~~ID(~~ frdionMelhod: 1-- '.' ~ll6 ~a411 fluo ~Q.41 Jam 1'.43023 flL09 10m 10.10 p1l5 Js.tx:t- Uniam~lfi~V~f1owl .. M=ages] SdYe,for, "1- 0eIM> ..::J ~ -_. ..:J FIo>w mo: 1lIlt -- 11 -- fIJlI(H:V) Top_ Mt(H:V) QilcoI ~ 11 Qtical Slope: fl'1s Velociy: VeIocIy Head: Specific Enerw. __ flow r_ DiscIll!rge: .' .' . ' .'. , ':.., 13 CaIcU.qonSut:Cemul ! ..::J ._.. , l' ..~': .; 1i.. ' , 11. 11 11 1lIlt 1lIs -11 11 . '. '. " The velocity is 0.09 feet per second. Solving for the length of treatment swale: L=VxT = O.09ft/sec x 9 minutes x 60 secondsll minute L= 48.6 feet Therefore, the treatment swale in Detention Pond A must be longer than 4816 feet. ( Date Received: MAR - 8. 2011 Original submittal . . Stann Drainage Evaluation . Jasper Meadows Phase 10 Appendix D . I Routing Data and Detention Calculations I , ~ Date Received: . MAR - 8 2011 Original Submittal . . Basin A - Detained Runoff Rates Storm Drainage Evaluation Jasper Meadows Phase 10 RESERVOIR ROUTING INFLOW/OUTFLOW ROUTINE SPECIFY {d:] [pathlfilename[.,ext] OF ROUTING DATA l0198a.rd DISPLAY ROUTING DATA {Y or N) '? Y ROtrrING DATA: DISCHARGE {CFS) .00 .07 .10 .12 .14 .15 .n .18 .19 L26 3.19 5.70 8.66 12.01 STORAGE (CU-FT) , .0 347.0 709.0 1085.0 1477.0 1884.0 2306.0 2743.0 3196.0 3664.0 4147.0 4646.0 516LO 5693.0 PE1lI!-AREA (SO-IT) .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 STAGE(ET) 532.00 532.25 532.50 532.75 533.00 533.25 533.50 533.75 534.00 534.25 534.50 534.75 535.00 535.25 ~ AVERAGE PERM-RATE: . 0 lUNUTESIINCH 2 YEAR STOBM RVBN"l ENTER (d:] [pathlfilename[.ext] OF COMPUTED HYDROGRAPH: 198-2a.dev tNFLON!OUTFLOW ANALYSIS: PBAlt.-:INFLCJif(CFS) PEAlt-otJ"1TLOW(CFS) OUTFL01i'-V'OL (CU-IT) .54 , .14 8100 INITIAL-STAGE (FT) TlHE-OF-PEAK(HRS) PDlt-SDGE-EJ.,;JN(FT) .00 8.83 533.11 PEAK STORAGE: 1650 CU- FT SNTER [d:] [path] filename [. ext] FOR STORAGE OF CQl!PUTED HYDROGRAPH: 19B-2a .sta 5 Y.DR STORK E'9Eln BNTER (d:] [path]filenamel.ext.l OF COMPUTED HYDROGRAPH: 198-5a.dev INFLOW/OUTFLOW ANALYSIS: PlWt-ZNFLOIf (OS) PBlllt-<llm!'LDllICFll) 'OUTFLOW-VOL lCO-IT) .64 .16 9104 INITIAL-STAGE- (Fr) TIHE-QF-PEAK (HRS) PEAK-SDGB-KLXV(F.fJ .00 9400 533.38 PEAl{ STORAGE: 2100 CO-F'l' EN"l'ER (d:] (path] filename (.ext] 'FOR STORAGE OF COHPU'rED HYDROGRAPH: 198-5a4sto I ,I I I I Date Received: MAR - 8, 2011 Original submittal . . 10 YEAB. S'i"ORH EVIi:NT Storm Drainage Evaluation Jasper Meadows Phase 10 ENTER ld: 1 [path]filename[.ext] OF COMPOTED HYDROGRAPH: 198-10a.dev INFLOW/OUTFLOW ANALYSIS: PDlt-DIFLOW(CFS) PEAlt-..ooD'LClf(CFS) OOTFLQW-VOL{CU-FT) .75 '.J.8 111'74 INITIAL-STAGE (FT) TlME-QF-PEAK(HRS) PBAlt-SDGB-:BI:.BV(F%) .00 10.50 533_66 PEAK STORAGE: 2580 C:O-Fr ENTER Cd:] (path]filename[.ext] FOR STORAGE OF COMPUTED HYDROGRAPH: 19"5-lOa.sto 2S "fEU. S'J.'CRH B\l'E!ft ENTER (d:] (path] fi.lename [. ext] OF CClHPUTED HYDROGRAl?H: 198-25a.dev ~ INFLOW/OUTFLOW ANALYSIS: PEAlt-nm'LOIr(CFS) PDJt~(CFS) OUTFLOW-VOL (CU-FT) .85 .19 12704. INITIAL-STAGE (FT) TIn-OF-PEAK (RRS) PBAK-STASE,-l!:LEV(Jr'!') .00 10.83 533.99 PEAK STORAGE: 3170 CU-FT ENTER Cd:] (pathJfilename[.ext) FOR STORAGE OF COMPUTED HYDROGR1\PH: 198-25a.sto Date Received: MAR - 8 2011 ,original Submittal . . Basin B - Detained Runoff Rates Stann Drainage Evaluation Jasper Meadows Phase 10 RESERVOIR ROOTING INFLOW/OUTFLOW ROUTINE SPECIFY Cd:] [path] filename {.extl OF ROUTING DATA l0198b.rd DISPLAY ROUTING nATA (Y or N)? y ROUTING DATA: STAGE(FI') 523.00 523.25 523.50 523.15 524.00 524.25 524.50 52'.15 525.00 525.25 525.50 525.15 526.00 526.25 DISCHARGE (CFS) .00 .25 .35 ..2 . .49 .55 .60 .65 .69 "" 1.19 3.15 6.28 9.21 12.65 AVERAGE PERM-RATE: STORAGE fCU-FT} .0 589.0 1241.0 1960.0 2746.0 3589.0 4476.0 5408.0 6386.0 1409.0 8480.0 9598.0 l076L 0 11.978.0 PERI!I~AREA (SQ-FT) .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 MINUTES/INCH 2 nA:R S'JDM B'V'ENT ENTER [d~l Ipathl filename [.extl OF COMPUTED HYDROGRAP~: 198-2b.dev INFLOW/OUTFLOW ANALYSIS: PEAlt-Dl!'LOW(CI!'S) PEAl<-<lll'fi'LOW(CI!'S) OOTFLOW-VOLICO-F'rl 1.53 .~ 23036 INITIAl.-STAGE en) TlME-OF-PEAK(HRS} PBAK.-S'f'AGI!:-ELEVOi"f) .00 8.67 524.19 PEAK STORAGE: 3390 CU- FT ENTER (d:] (pathlfilename{.ext] FOR S1'ORAGE OF CQBPUTED HYDRCXiRAPH: 198-2b.sto 5 YEAR STORK EVENT ENTER {d:] [pathlfilename[.ext] OF COMPUTED HYDROGRAPH: 198-Sb.dev INFLOW/OUTFLOW ANALYSIS: PJUUt-:norI.OiI(CFS) PKAlt-otJD"LOW(CI'S) OUTFLOW-VOL (CU-E7) 1.82 .59 21381 INITIAL-STAGEtn') TlME-OF-PEAK(HRS) PDX-SmGE-ELEV(ft) . .00 8.61 524.4'1 PEAK STORAGE: 4310 CU-FT ENTER {d:] (path]filename{.ext] FOR STORAGE OF COMPUTED HYl)ROGFAPH: 198-Sb.sto I -, ! Date Received: MAR - 8 2011 Original Submittal . . 10 YD.ll S!rQR1( Evmr.r Stoim Drainage Evaluation Jasper Meadows Phase 10 ENTER rd:l [path]filemame[.ext] OE COMPI1TED HYDROGRAPH; 19S-10b.dev INFLOW/OUTFLOW ANALYSIS: PEAK-D!lFLCIlICl!'S1 PEAK-<llnFLOIIICFS) OUTFLOW-VOL (Cll-FTl 2.12 .65 31681 IN:lT!AL-STAGE{IT) TIllE-oF-PEAK(BRSl PEAK-__"",,",In) .00 8.61 S24~16 PEAl( STORAGE: 5~40 CU-FT ENTER [d:] [path]filename[.ext] FOR STORAGE OF COMPUTED HYDROGRAPH: 198-1Qb.sto 2S YRMl ~ l!:VERl' ENTER Ed;) [pathlfHenamel",ext] OF COMPlJ'i'ED lMlROGRAPH; 199-25b. dev INFLOW/OUTFLOW ANALYSIS: PlWt-D!lFLCIlICFS) PEAK-otm1'LClli'ICFS) OllTFI.Oli-vOL (Cll-ITl 2.43 .82 36123 INlTIAL-STAGE(FT) TlME-QF-PEAK(BRS) PEAK-STAGE-ELEV(rJ') .00 8.61 525.03 PEAK STORAGE: 6500 CU-FT ENTEtl [d:l [path]filename[.e:xt] FOR STORAGE OF COMPUTED HYDR.OGBAPH: 198-25b. sto I I Date Received: MAR - 8 2011 qriginal Submittal . . Storm Drainage Evaluation Jasper Meadows Phase 10 Addinl!: Hvdro1!l'llnhs The hydrographs from Detention Pond A, Detention Pond B and the undetained Basin C must now be added together to determine the total runoff which can not exceed the pre-developed rates. 2 Year Develooed Runoff Rate ENTER: Cd:] (pathlfilename[.extl OF HYDROGRAPH 1: 198-2a.sto ENTER: TRAVEL TIME (KINU'rES) OF HYDROGRAPR 1: 10 ENTER: [d:) {patb]filename[.ext] OF HYDROGRAPH 2: 198-2b.sto ENTER: TRAVEL TIME (MINUTES) OF HYDRQGRAPH 2: 5 DATA PRINT-oUT: HYDROGRAPH 1: PEAK-O=- HYDROGRAPH 2: PEAK-Q= .14 CFS T-PEAK=- 8.11 HRS T'l"= 10 MINUTES .54 eFS T-PEAK= 8.67 HRS 'l'T=< 5 MINUTES RYDROGRAPH S11M: PEAK-Q=- ".68 eFS 'l-PEAK"" 8.61 HRS TOTAL VOLOME: 31110CU-FT SPECIFY: C - CONTINUEr N - NEWJOB, F - FILE. P - PRINT, S - STOP C ENTER: Cd:] [path]filename[.ext] OF HYDROGRAPH 3: 198-2c.dev ENTER: TRAVEL TIME (MINUTES) OF HYDROGRAPH 3: 0 DATA PRINT-oUT: HYOROGRAPH S: PEAP::-Q=o HYDROGRAPH 3: PEAK-Q--o .68 CFS T-PEAK=- 8.61 HRS TT= 0 tUNUTES .13 eFS 'I-PEAK'" 1.83 HRS TT~ 0 MINUTES BmBCGltAPB: SON: PEJUt-Q- .73 CIi'S T-PE&l'C= 8.17 BRS TOTAL VOLUME: 32910CO-FT 5 Year Develooed Runoff Rate ENTER: Cd:] [pathl.filename[.ext] OF HYDRDGRAPR 1: 19B-Sa.sto ENTER: TRAVEL TIME (MINUTES) OF BYDROGRAPH 1: 10 ENTER: [d:] [pathlfilename[.ext] OF HYDRQGRAPB 2: 198-5b.sto ENTER: TRAVEL TIME tltlNUTES) OF HYDROGRAPH 2: 5 Dl\TA PRINT-QUT: HYDRQGRAPH 1: PEAR-Q::o HYDROGRAPH 2; PEAK-Q- .16 eFS T-PEAK- 8.67 HRS TT= 10 MINUTES .59 eFS T-PEAK- 8.50 HRS TT= 5 MINUTES HYDROGPAPH SOM: PEAK-o- .75 CFS T-PEAK- 8.67 BRS TOTAL VOLOME: 37074eU-FT SPECIFY: C - CONTINUE, N - NEWJOB, F - FILE, P - PRINT. S - STOP c ENTER: Cd:] [pathlfilename[.ext] OF HYDROGRAPH 3: 198-5c.d~ ENTER: TRAVEL TIME (MINUTES) OF HYDROGBAPH 3: 0 DATA PRINT-OUT: HYDROGRAPH S: PEAK-Q- RYOROGRAPH :3: PEAK-o- .75 CFS T-PEAK- 8.67 HRS TT- 0 MINUTES .15 eFS T-PEAK- 7.83 HRS TT- 0 MINUTES IJYn~B SUN: PDlt-o=- .80 CJl'S ':r-PJmKo::- 8.17 BRS Date Received: TOTAL VOLUME: 39384C{]-F'!' MAR - 8 2011 Original Submittal . . Stonn Drainage Evaluation Jasper Meadows Phase 10 10 Year DeveloDed Runoff Rate EliTER: [d:] {pat.hlf11ename[~ext] OF HYDROGRAPH 1: 198-10a.sto ENTER: TRAVEl. TIME (.KDroTES) OF RYDROGRAPH 1: 10 ENTER: td:][path]filename(.ext] OF HYDROGRAPR 2:- 198-10b.sto ENTER:: TRAVEL 'TIME (Hl1m"1'ESl OF HYDROGRAPH 2: 5 DATA P.R.Im-Qm-::: RYllOO1GIW.'ll 1: PEAK-Q=< lMlll<lGRAPR 2: PEI\K-Q- ~18 CYS T-PEAK= 9.00 HRS TT= 10 MINUTES .65 t..FS T-PEAK= a. 67 HRS TT= 5 MINUTES B'Y'DROG:B.A?B SUM: PEAR-Q- .63 CFS 'T-PEAK= 9.00 HRS = vm.uME: 4281QCU-FT SPECIFY: C - CONTINUE. N - NEWJOB. F - FILE, p - PRINT, S - STOP C ENTER: Id:]'[path)filename(~ext] OF HYDROGRAPH 3: 198-10c.dev ENTER: TRAVEL TI.ME (MINUTES) OF HYDROGRAPH 3::: . 0 DATA t>>RIN'!'~: HYDllOGRAPB: S: PEAK-Q;:- lIYll!<OGRAPH 3: PEAK-IF .83 CFS T-PEAK= 9.00 HRS TT= a MINUTES .17 crs T-PEAK= 1.83 HRS TT= 0 KINUTES JmlIlOGIlAPlI smI: PlW<-<p . as as T-PEAK- 8.50 BRS 'I'OTl\L VUMJIlE: 454HCU-FT . 25 YeaiDeveIoDed Runoff Rate ENTER: Cd: J [path}filenamel.extJ OF HYDROGRAPH 1: ~98-2Sa_sto ENTER: TRAVEL TIME {MINUTES} OF HYOROGRAPH 1::: 10 ENTER: Id:] [pathlfilenamel.ext] OF HYDROGRAPH 2: 198-2Sb.sto ENTER: TRAVEL TIME (MINUTES) OF HYDROGRAPH 2: 5 DATA PRINT-GUT: HYOB.QGR.APR 1: PEAK-Q== RYDll.OGRAPlI 2: PEAK-IF .19 CFS T-PEAK- 9.00 HRS TT- 10 MINUTES .81 CFS T-PEAK""' 8 . 67 HRS' TT=- 5 KnfUTES HYDROGRAPU SUM: PEAK-Q- ~99 CFS T-PEAK- 8.67 HRS TOTAL VOLUME: 48828CU-FT SPECIFY: C - CONTINUE, N - NEWJOB. F ... FILE, P - PRINT, S - STOP. c ENTER: [d:] [pathlfilename[.ext] OF HYDROGRAPH 3: 198-25c.dev ElI'l'ER: TRAVEL TIME (MINUTES) OF HYDROGRAPH 3: 0 DATA P.RIN'T-ouT: RYDlIOGRAPR S: PEAK-<p llYDROGRAPH 3: PEAK-<:1=' .99 eFS T-PFAK- 8.67 HRS TT=z 0 MINUTES .20 crs T-PEllK- 7.83 HRS TT- 0 IUIlOTEs .tIUJI'Q' ~ 80M: PEAlt""2= 1.05 as T-PEAX.-o 8.67 HIlS = VOL1lHE: S1726CU-FT Date Received: MAR - 8 2011 Original Submittal . ," e: Stonn Drainage Evaluation Jasper Meadows Phase 10 Appendix F Off-site Runoff Calculations and Culvert Sizing , ~ , Date Received: MAR - 8 2011 Original Submittal o o .. . . . Stonn Drainage Evaluation Jasper Meadows Phase 10 Basin A Runoff - 50 Year Storm Using the Santa Barbara Urban Hydrograph method, the runoff is determin~ below: I ++....+..........."'+ S.C.S. TYPE-IA DISTRIBUTION .....*!............. ......... SO-YEAR 24-HOUR STORM .*.* 5.00~ TOTAL PRECIP. ......... ENTER: A (PERV) . CN(PERV), A (IMPERV) . CN(IMPERV), TC FOR BASIN NO. 1 13.4, BO, B. 9,,98.20 DATA PRINT-oUT; AREA (ACRES I 22.3 PERVIOOS A eN 13.4 80.0 INPERVIOOS TC lKINUTES J A eN 6.9 96.0 20.0 PlWt-ll (Ci'S) 11.00 T-PEAKIl!RS) 1.63 VOL {CU-F'l') 293523 - " BlIllin B Runoff - 50 Year Storm Using the Santa Barbara Urban Hydrograph method, the runoff is determined below: **.........*........**."'.. S.C.s. TYPE-lA DISTRIBUTION ........*....,..............* **........ 50-YEAR 24-HOUR STORM **** 5.00. TOTAL PRECIP. ...........** ENTER: A(PRRV). CN'(PERV), A(IMPERV), CB{IKPERV}. TC FOR BASIN NO. 3 6.1,80,9.1,98,10 DATA PRINT-OUT: AREA (ACRES) 15.2 PERVIOUS A eN 6.1 80.0 IMPERVIOUS TC (MINUTES) A CN 9.1 96.0 10.0 PlWt-ll (Ci'S) 15.08 T-PEAK(HRS1 7.63 VOL (CU-F1') 221282 BlIllin C Runoff - 50 Year Storm Using the Santa Barbara Urban Hydrograph method, the runoff is determined below: .~........*....***.* s.c.s. TYPE-IA DISTRIBUTION .................... .*.*.***. SO-YEAR 24-BOOR STORM ..** 5.00. TOTAL PRECIP. **....... ENTER: AIPERVI ~ CN(PERV}. AUKPERV}. CN(IHPERV), TC FOR BASIN NO. " 6.5,80,15.3.98,10 DATA PRINT-OCT: AREA {ACRES l PERVIOUS IMPERVIOUS TC (KIllllTES I- A CN A CN 21.6 6.5 80.0 15.3 96.0 10.0 P1W<-ll (CFS) T-PEAK(HRSl VOL (CU-Fr) 22.61 1.83 332629 Date Received: MAR - 8 2011 Original Submittal . . Storm Drainage Evaluation Jasper Meadows Phase 10 Basin D Runoff - 50 Year Storm Using the Santa Barbara Urban Hydrograph method, the runoff is determined below: .................... s.c.s. TYPE-IA DISTRIBUTION .................... I ****...*",,,,.' 50-YEAR 24-ROUR STORM **"'... 5.00. TOTAL PRECIP. .*...ir,:Il':u,,,,* I ENTER: A(PERV}, CN(E'ERV), A{IMPERV). CN(IMPERV). TC FOR BASIN NO., 2 19.4,80,12.2,98,20 DATA PRINT-QUT: AREA (ACRES) PERVIOUS IMPERVIOUS TC (MINU'l'ES) A CN A CN 30.6 18.01 80.0 12.2 98.0 20.0. PlWt-Q las) T-PEARlRRS) VOLlCU-IT) 23.32 1.83 402686 " Basin E Runoff - 50 Year Storm Using the Santa Barbara Urban Hydrograph method, the runoff is determined below: **"'''''''''''''..............*...'''........ S.C.S. TYPE-IA DISTRIBUTION ***.......*"'......****."'**** **.****** 50-YEAR 24-HOOR STORM .... 5.00. TOTAL PRECIP. ********* ENTER: ~(PERV). CN(PERV). A(IMPERVI. CN(IHPERV). TC FOR BASIN NO.' 5 12.1,80.18.2.98.1Q DATA PRINT-QUT: AREA (ACRES) PERVIOUS IMPERVIOUS TC (MINUTES I A CN A CN 30.3 12.1 80.0 18.2 98.0 10.0 PBAB:-Q(as) T-PEARIRl\Sl VOL (CU-IT) 30.09 1.83 "1515 Basin F Runoff - 50 Year Storm Using the Santa Barbara Urban Hydrograph method, the runoff is determined below: *******.************ S.C.S. TYPE-lA DISTRIBUTION *****~*.*~~****~*~** **..*..** 50-YEAR 24-HOUR STORM .**~ 5.00. TOTAL PRECIP. .~*~..*.* ENTER: A(2'ERV), CN{PERV), A(lKPERV), CN{IMPERV), TC FOR BASIN NO; 6 1.2,80,16.1,98,10 DATA PRINT-ouT: AREA (ACRES) PERVIOOS IMPERVIOUS TC (MINUTES) A CN A CN 23.9 1.2 80.0 16.1 98.0 10.0 PlWt-Q (Cl1'S) T-PEAK(HRS) VOL (CO-IT) 24.82 1.83 3641 10 .. Ae Heceived: t.....~R - 8.2011 . ~il''l! Submittal ~ -" ;s- u. o I- UJ W I m -, ,~ ,It, ZZ oQ ;::1- ~ <:; <( >W o W-, _mW a:: a:: WW I-!;{ ~3; 00 iijU'i I'" ~~ ",m I- ~~ WOO .....-' W -,-' <(<( ::I: a:: ::;;::;; U) l1;! :J::l Cl ::;;~ Z U; ~~ C):!l ::;;::;; iii-gg W 00 lilt C ",Z r--_ I- U 0 I --... a:: wu;2- ~ 6:!l1~ ::) Fci o .. ~ a ,g i . c ~ ... "0 II t . Cl CI- ~lil Cl~ ~~ Z o ~ m ~ o --' <( () a 9 ~~ 0' a: - ~'IIl I i i -'-' WUJ "'m Iw uo ~ "- o o i!: w ~ I I I I I I I I 1 1 -I I I I I I I 1 I l> II ... r; s ill 0:: <( W Cl <( Z ~ '0 ~ t: ~ I 1 ~ e- :t! ~..j ~ R ~ ~ ---- ~ Iii a. o -' U) ~ Iii 0:: I- U) Iii a. <( I U) -' ill Z Z <( ::t o ~ o g <l ~ € I I- (!) 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'" -~ S~ ~ - ~(t) -2-"" ..... o - l!! .. ~ ;'\ ~ \I) a:: U) W o '" ::t o m I- Z w ::;; ::; o U ,~ ~ ~J€ ~ -W- N \() ~ ":i- N '" ~ <> >'" ,g iDJ4:' -w- :)- ",<:: € ~ -I=-~ -.!l -' ~w..5€ ~ o N a:: '" I- Z o o I- W g >::~I c "1 oJ V. ~1r:~-az"GI ....s ~.~~ ~ ...S) Z o ;:: a a: o U) w o I- a:: UJ 3 :J U w ~- u-".. Z . 0 ~~~ I-jt'" ~~~ I W 0 ~ ,~ m I w a <( I U) I " -,ll:~ ..J- - .. a::.. ~N..3 ~ ; ~ <:r <Xl ....;. to:> -8g ~ ....;. :5:- ...9 IE. . N <i 3 '" t'\ ~ Z a i= o W I- a 0:: a. Z o ;;; <( a:: m <( ~ ~ ~ ~ ~ Date RecE ived: 'E ., u $''10 :;~ C nO lD - lDtlI U - ~~t ~c ~ ~ E- G ii...J 0 & ~ omS 0 C (II .5 ~ c:: 'ii_OJ g~,gCJ~ gc:SE ~~Jie.g.-~~a~ ~oo tii sfl;s;o'" g -......m ~mo - .2cc_a:-O::t:...~ oooo~flJUJ v.!! cnlDOO"'Cl~~tUllD zt-_....,.GJCl;lJ:::J~~~ OGClqJ.Qc..ceau=t.:;; _GC5Eco.a~~lD 1-~IO~;;6~D Q';: ~s;: A a Sf 11 a -:~ D fu.c::I:.:2zc:oa:n:~> o I- a. ~ o <D m ::> U) - ~" W ,,- -' -e m eO _<C =- z:.,g ii - - :> .r-$:. 0:: =5";~GJ .- <C-~~ o..!!w = = >E='~iiUJ... 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Culverts . . 9-A-13 CHART 10 HEADWATER DEPTH FOR BOX CULVERTS WITH INLET CONTROL D 600 (1) (2) ~ 500 EXAIIPlE SXZBmr: Q=15'* 8 9 0 ~ 400 QIB= 15d'st1'1 7 8 6 7 8 300 -W~ 6 7 (1) US 3.5 5 5 6 ZOO (2J tOO s.a 4 4 5 ~ 2.D5 4.1 4 3 .... 3 0 3 0 100 lL 0 a: BO ~ 2 w <L 2 .. 60 2 lL 50 citsc-I 0 1.5 ~ 40 1.5 1.5 ltuJ ~./.3 30 15 ::E a: w }fW= z-fo .... 1.0 of ~ :r .9 1.0 1.0 - .... 10 Rare J= ~ .8 .9 .9 8 a: w .7 .8 .8 .... 6 ~ 5 "0 :7 .7 4 ii'i .6 :r 3 .6 .6 .5 2 .5 .5 .4 12 11 10 9 8 7 6 Iii 5 w lL ~ 4 !a )( 5l lL 0 3 !i: '" ill :r 1 1" .B HW SCAl.EWlNGWAll. .6 0 RARE .s (1) 3001D 75Q (2) 9(tIendlSG (3) 011 Exh..a..."'" -, aI_ .4 .4: .30 .35 .35 Tou:sa:s::afa(2)C3)prajecI -.......~J_ usu sIralght inclined In8 tI'nuJh o and Q.scaIes. or nMIIS8 as --- ~iM~: " M_R" ~ rf212011 ~~ I Culverts . . 9 -A -15 CHART 12 HEAD FOR CONCRETE BOX CULVERTS I FLOWING FULL IN OUTLET CONTROL D n = 0.012 5000 4000 "- 3000 2OllO 1000 ..x.. 800 laX~ loolii w 600 n. 80lL w soolii .n 8O~ w :::J 400lL 7X7 500 ;!; OJ OJ SOOX n. 40;!; lL g X 0 30g ;!; W 2000: n. 2O~ e: ~ w 0 :f OJ '" lL ... ~ 0 0 100 ~ UltU 10 II! OJ - ". is ~t1X3 lL :; 8 0 BO Duxu i5 50 6 c.'" =-s~ ..,..-- In 4 30 20 10 8 6 5 3~ / =_ '-i~~ SUBUERGED OunET'wrTH aJl..VERT ROWING RJU. Far oudrJt auwn not suIlrnqed. a;xnput8 HW br mstiads duscrIled ~ 1b8 design pa:Dtunt .4 .5 ::_#;0.8 1-0 <j>o> " #/.. :I: 3 ..//"# 4 \..~.; # . 5 .......~.O' # 6 ....... HD73__ // El<AIoI!'!!'_-------- 8. --- .-. <-".. 10 20 '" z w Z Z 0: ::J. F! ODlU~: MAR - 8.2011 Original Submittal . . Worksheet for Tailwater Project Description Friction Method Manning Formula SoIw For Nonnal Depth Input Data Roughness Coefficient 0.040 CharmelSlope 0.00660 ftJll Left Side Slope 50.00 ftJll (H:V) Righi Side Slope 50.00 ftJll (H:V) Bottom Width 10.00 11 DischaJge ~ 133.00 ft'Is ~.' . Results ..,i, 1l Nonnal Depth 1.04 I\~ Flow Area 64.45 I\' Welled Perimeter 114.00 11 Hydraulic Radius 0.57 1\ Top Width 113.98 1\ Critical Depth 0.75 1\ Critical Slope 0.03109 ftJll Velocity 2.06 Ills Veloclly Head 0.07 11 Specific Energy 1-11 11 FlOude Number 0.48 Flow Type Subcrilical GVF Input Data Downslream Depth 0.00 11 Length 0.00 11 ~',.' Number Of Steps 0 GVF Output Data Upstream Depth 0.00 11 PlOfiIa Descrip_ Profile Headless 0.00 1\ Downstream Velodly Infinity Ills Upstream VeloclIy Infin!Iy Ills NonnalDepth 1.04 11 Critical Depth 0.75 11 Channel Slope 0.00660 ftJll 11131l/Z010 B:4S:3G AM IlenllerSysloms, Inc. ___~ &-.,A.- [lJ8.11.1lO.03J 27 Slemons Compony Drive SuIIe 2IllI W W....."'-~ CT IJ6795 USA ..,_aB_755_1S68 Page , of z Date Received: MAR - & 2011 Original Submittal Channels . . 8-8:-23 t~T 3L:j 1- l1--B-i 5 t: ~ ~o. d.,,~I.(" ---+ ,. '5 14 '3 ,. " t: ~ 10 .J' 9 . 7 . 5 . CHART 16 CRITICAL DEPTH IN BOXES . I I I' .- d_CANNOT EXCEED 0 -- - - - - ~ .... CRrneAL DEPTH - /- ..... RB:TANGIJIAR SECT10N " .......- ../ 3 o o '0 20 so 40 01 - ~- 11.05 B - - (. 50 III 1....- , ~ '.I' / dcCANNOT EXCEED 0 -' 1/ -' CArnCAL DEPTH I- / RB:TANGUlAR SECTlON !...- I' I? ~ -e- o BINFT a IN c.F.s de..315!Oia13t2 50 111l '50 200 . OIB .BI soo 350 ODOTH~~~ived: MAR - 8 2011 Original Submittal