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Drainage Report
1 1 1 1 Drainage Report 1 for Castle Rock Subdivision Phases ? &8 1 College Station, Texas 1 June, 2010 1 Engineer: SCHULTZ ENGINEERING, LLC. P.O. Box 11995 College Station, TX 77842 2730 Longmire Drive, Suite A College Station, Texas 77845 (979) 764 -3900 Developer. Greens Prairie Investors, Ltd. 4490 Castlegate Drive College Station, Texas 77845 (979) 690 -7250 1 Schultz Engineering, LLC. P.O. Box 11995 College Station, Texas 77842 979.764.3900 office 979.764.3910 979.436.1559 mobile July 16, 2010 Erika Bridges, EIT Graduate Civil Engineer Department of Public Works 1101 Texas Avenue College Station, TX 77840 Re: Castle Rock Phase 7 & 8 — Drainage Report Addendum Dear Ms. Bridges: Attached are 2 copies of the revised executive summary, revised water report, revised sewer report and the revised cost estimate and 1 copy of the revised construction drawings. Please let me know if you want me to have the revised drainage report pages inserted into your copies of the drainage report. If you have any questions, please do not hesitate to call. Very truly yours, Schultz Engineering, LLC. � i Joe I ultz, '.E. Civil ngineer -7 •IG .10 3 Castle Rock Subdivision, Phases 7 & 8 /O . Drainage Report — Executive Summary ENGINEER 3 SCHULTZ ENGINEERING, LLC. { P.O. Box 11995 , , v College Station, Texas 77842 Phone/Fax: (979) 764 -3900 OWNER/DEVELOPER Greens Prairie Investors, LLC 4490 Castlegate Drive College Station, Texas 77845 Phone: (979) 690 -7250 GENERAL DESCRIPTION AND LOCATION Location: Castle Rock Subdivision, Phases 7 & 8, is located on the north side of SH 40, William D. Fitch Parkway, near its intersection with Castle Rock Parkway. Description: • Area: 14.040 acres • Proposed Land Use: PDD- Single Family Residential • # of Lots: 71 lots • Existing Land Use: Agricultural — consisting primarily of a wooded pasture used for cattle grazing • Land Description: Rolling terrain that falls north toward Spring Creek. The site is heavily wooded. Adjoining Land Use: The site is bounded on the south by a common area along William D. Fitch Parkway which was included in the Phase 1A plat and on the north and west by developed sections of the Castle Rock Subdivision, and on the east by a greenbelt. Primary Drainage Facility: Spring Creek Flood Hazard Information: FEMA FIRM: # 48041CO205 D (February 9, 2000) Floodplain: No portion of these Phases lie within the floodplain of Spring Creek or its tributaries. HYDROLOGIC CHARACTERISTICS The existing site is predominately wooded. The elevations range from 281 to 299, sloping generally in a northly direction where the runoff enters the drainage systems designed in Phases 2B and 5, then into the tributaries of Spring Creek, which ultimately flow into Spring Creek on the adjacent tracts. GENERAL STORMWATER PLAN The drainage plan for this development will involve the installation of inlets, junction boxes and storm sewer pipes which will connect to the existing storm sewer systems designed in Phase 5 of Castle Rock. The runoff will ultimately be discharged in Phase 6 into the tributaries of Spring Creek. The detention pond for this proposed development is located downstream of this development, on Spring Creek, adjacent to SH 6, on the Crowley Tract, which is being developed as the Tower Pointe development. Page 1 of 3 Rev. July 2010 COORDINATION & STORMWATER PERMITTING The project will require that a Notice of Intent be submitted to the Texas Commission for Environmental Quality. No other permits are anticipated for this project_ DRAINAGE DESIGN General Information: Stormwater runoff from Phases 7 & 8 of the subdivision will be collected by a storm sewer system that will connect to the system designed in Phase 5 of the Castle Rock subdivision_ The runoff will ultimately discharge into the tributaries of Spring Creek. The location of the drainage areas for evaluation of the gutter depth check, inlet sizing and pipe evaluation are shown on Exhibit A. Also shown are the location of the inlets, junction boxes and storm sewer pipes. Street Design: Standard cross- section (3% cross- slope, 27' B -B residential) Lay down curb & gutter on residential streets Asphalt pavement Standard recessed curb inlets (5' and 10' in length) T Methodology: TR 55 T Minimum 10 minutes Design Storm Event: 10 -year - residential street & storm sewer Pipe Materials: Corrugated HDPE w /smooth interior, RCP, Profile Gasket in accordance with ASTM C443, ASTM C76, Class III M anning's n Value: 0.013 or 0.012 for HDPE w /smooth interior Runoff Coefficients: 0.60 for developed lots Design Constraints: Max. water depth in curb = 4.0 in. or 0.33 ft. Min. flow velocity = 2.5 fps Max. flow velocity = 15 fps 100 -yr storm runoff maintained within the ROW (4 inches above curb) 25% Reduction in cross - sectional area of pipes less than 27" in diameter Design Software: Excel spreadsheets, DODSON HydraCalc Hydraulics This software was used to compute pipe capacity, flowrate and velocity through each pipe, and determine hydraulic grade line elevations at each inlet or junction box. All of this information is shown in the summary tables in Appendix E. The College Station requirement for a 25% reduction in cross - sectional area of pipes less than 27" diameter is achieved by using internal pipe diameters that are less than the standard diameter. The 24" diameter pipe areas were reduced by 25% and a 20.6" diameter pipe used in the analysis and the 18' diameter pipe areas were reduced by 25% and a 15.6" diameter pipe was in the analysis. Design Results The data presented in the Appendices indicates the gutter depth, inlet sizing and pipe sizes are in accordance with the requirements of the design guidelines. Page 2 of 3 Rev. July 2010 Applicable Exhibits: Exhibit A — Drainage Area Map Appendix A — Technical Design Summary Appendix B — Drainage Area Calculations Appendix C — Depth of Flow in Gutter Summary Appendix D — Inlet Design Summary Appendix E - Pipe Design Summary DETENTION DESIGN General: Stormwater runoff from Phases 7 & 8 and all previous of the Castle Rock Subdivision flow into Spring Creek upstream of the regional detention facility constructed in 2001. This facility was designed to control stormwater releases from the Castle Rock Subdivision and other adjoining properties. No additional detention facilities are provided with the development of this project. CONCLUSION Based on the concurrence with the previous design calculations from Phases 5 & 6, the drainage system in Phases 7 & 8 of the Castle Rock Subdivision will function within the requirements and restrictions of the College Station Drainage Policy and Design Standards. CERTIFICATION I, Joseph P. Schultz, Licensed Professional Engineer No. 65889, State of Texas, certify that this report for the drainage design for Castle Rock Subdivision, Phases 7 & 8, was prepared by me in accordance with the provisions of the Unified Stormwater Design Guidelines. . er - . I 1;l e- , t t I N Lima 6fi 0 el % *: *: 1:* Joseph /'. Sci ltz, P.E. u JOSEPH P. SCHULTZ 65889 F -12327 SCHULTZ ENGINEERING. LLC. Page 3 of 3 Rev. July 2010 1 Castle Rock Subdivision, Phases 7 & 8 Drainage Report — Executive Summary ' ENGINEER SCHULTZ ENGINEERING, LLC. P.O. Box 11995 College Station, Texas 77842 Phone/Fax: (979) 764 -3900 OWNER/DEVELOPER Greens Prairie Investors, LLC 4490 Castlegate Drive College Station, Texas 77845 Phone: (979) 690 -7250 GENERAL DESCRIPTION AND LOCATION Location: Castle Rock Subdivision, Phases 7 & 8 , is located on the north side of SH 40, William D. Fitch Parkway, near its intersection with Castle Rock Parkway. Description: • Area: 14.040 acres • Proposed Land Use: PDD- Single Family Residential • # of Lots: 71 lots • Existing Land Use: Agricultural — consisting primarily of a wooded pasture used for cattle grazing • Land Description: Rolling terrain that falls north toward Spring Creek. The site is heavily wooded. Adjoining Land Use: The site is bounded on the south by a common area along William D. Fitch Parkway which was included in the Phase 1A plat and on the north and west by developed sections of the Castle Rock Subdivision, and on the east by a greenbelt. Primary Drainage Facility: Spring Creek Flood Hazard Information: FEMA FIRM: # 48041CO205 D (February 9, 2000) Floodplain: No portion of these Phases lie within the floodplain of Spring Creek or its tributaries. I HYDROLOGIC CHARACTERISTICS The existing site is predominately wooded. The elevations range from 281 to 299, sloping generally in a northly direction where the runoff enters the drainage systems designed in Phases 2B and 5, then into the tributaries of Spring Creek, which ultimately flow into Spring Creek on the adjacent tracts. GENERAL STORMWATER PLAN The drainage plan for this development will involve the installation of inlets, junction boxes and storm sewer pipes which will connect to the existing storm sewer systems designed in Phase 5 of Castle Rock. The runoff will ultimately be discharged in Phase 6 into the tributaries of Spring Creek. The detention pond for this proposed development is located downstream of this development, on Spring Creek, adjacent to SH 6, on the Crowley Tract, which is being developed as the Tower Pointe development. 1 i Page l of 3 i r 1 COORDINATION & STORMWATER PERMITTING 1 The project will require that a Notice of Intent be submitted to the Texas Commission for Environmental Quality. No other permits are anticipated for this project. 1 DRAINAGE DESIGN I General Information: Stormwater runoff from Phases 7 & 8 of the subdivision will be collected by a storm sewer system that will connect to the system designed in Phase 5 of the Castle Rock subdivision. The runoff will ultimately discharge into the tributaries of Spring Creek. The location of the drainage areas for evaluation of the gutter I depth check, inlet sizing and pipe evaluation are shown on Exhibit A. Also shown are the location the in, junon bom wer pipes. ° , I I Street Design: Standard loca cross - section of (3 lets /o cross - slope , xes 27 B - and resid se Lay down curb & gutter on residential streets I Asphalt pavement Standard recessed curb inlets (5' and 10' in length) I T, Methodology: TR 55 71 Minimum 10 minutes Design Storm Event: 10 -year - residential street & storm sewer r\ c;114 L9 I Ci Pipe Materials: Corrugated HDPE w /smooth interio , Profile Gasket in P g I accordance with ASTM C443 TM C78 Class III 1 Manning's n Value: 0.013 �CQ / U Z HDPE. Runoff Coefficients: 0.60 for developed lots Design Constraints: Max. water depth in curb = 4.0 in. or 0.33 ft. I Min. flow velocity = 2.5 fps Max. flow velocity = 15 fps 100 -yr storm runoff maintained within the ROW (4 inches above curb) I Design Software: Excel spreadsheets, DODSON HydraCalc Hydraulics I This software was used to compute pipe capacity, flowrate and velocity through each pipe, and determine hydraulic grade line elevations at each inlet or junction box. All of this information is shown in the summary tables in Appendix E. II u The College St.. • requirement ement for a 25% reduction in cross - sectional area of pipes less than &WV diameter is achieved by using internal pipe diameters that are less than the stans and diameter. The 24" diameter pip- eas were reduced by 25% I and a 20.6" diameter pipe used in the analysis and th= t0diameter pipe areas were reduced by 25% and a 15.6" diameter pipe was in the an. lysis. 1 1(61 Design Results The data presented in the Appendices indicates the gutter depth, inlet sizing and 1 pipe sizes are in accordance with the requirements of the design guidelines. 1 Page 2 of 3 ' Applicable Exhibits: Exhibit A — Drainage Area Map Appendix A — Technical Design Summary I Appendix B — Drainage Area Calculations Appendix C — Depth of Flow in Gutter Summary Appendix D — Inlet Design Summary I Appendix E - Pipe Design Summary I DETENTION DESIGN General: Stormwater runoff from Phases 7 & 8 and all previous of the Castle Rock Subdivision flow into Spring Creek upstream of the regional detention facility constructed in 2001. This facility was designed to control stormwater releases I from the Castle Rock Subdivision and other adjoining properties. No additional detention facilities are provided with the development of this project. I CONCLUSION Based on the concurrence with the previous design calculations from Phases 5 & 6, the drainage system in Phases 7 & 8 of the Castle Rock Subdivision will function I within the requirements and restrictions of the College Station Drainage Policy and Design Standards. 1 CERTIFICATION L I, Joseph P. Schultz, Licensed Professional Engineer No. 65889, State of Texas, certify that this report for the drainage design for Castle Rock Subdivision, Phases 7 & 8, was prepared by me in accordance with the I provisions of the Unified Stormwater Design Guidelines. i • Joseph V Sch tz, P.E. o ^� i S ° ° ° ° OF Tr� , ° °° A l i * ° /..%* .fi , A 11 7 JOSEPH P. SCHULTZ j p Q ..... ° .65 883....° I i ����Q . N� e F BI -'-' 1 1 1 Page 3 of 3 1 1 1 1 1 1 1 1 1 1 APPENDIX A Technical Design Summary 1 1 1 1 1 1 1 1 1 SECTION IX APPENDIX D — TECHNICAL DESIGN SUMMARY The Cities of Bryan and College Station both require storm drainage design to follow these Unified Stormwater Design Guidelines. Paragraph C2 of Section III (Administration) requires submittal of a drainage report in support of the drainage plan (stormwater management plan) proposed in connection with land development projects, both site projects and subdivisions. 1 That report may be submitted as a traditional prose report, complete with applicable maps, graphs, tables and drawings, or it may take the form of a "Technical Design Summary". The format and content for such a summary report shall be in substantial conformance with the description in this Appendix to those Guidelines. In either format the report must answer the 1 questions (affirmative or negative) and provide, at minimum, the information prescribed in the "Technical Design Summary" in this Appendix. The Stormwater Management Technical Design Summary Report shall include several parts as listed below. The information called for in each part must be provided as applicable. In addition to the requirements for the Executive Summary, this Appendix includes several pages detailing the requirements for a Technical Design Summary Report as forms to be completed. These are provided so that they may be copied and completed or scanned and digitized. In addition, electronic versions of the report forms may be obtained from the City. Requirements for the means (medium) of submittal are the same as for a conventional report 1 as detailed in Section I11 of these Guidelines. ' Note: Part 1 — Executive Summary must accompany any drainage report required to be provided in connection with any land development project, regardless of the format chosen for said report. Note: Parts 2 through 6 are to be provided via the forms provided in this Appendix. Brief statements should be included in the forms as requested, but additional information should be attached as necessary. Part 1 — Executive Summary Report Part 2 — Project Administration Part 3 — Project Characteristics Part 4 — Drainage Concept and Design Parameters Part 5 — Plans and Specifications Part 6 — Conclusions and Attestation STORMWATER MANAGEMENT TECHNICAL DESIGN SUMMARY REPORT Part 1 — Executive Summary This is to be a brief prose report that must address each of the seven areas listed below. Ideally it will include one or more paragraphs about each item. 1 1. Name, address, and contact information of the engineer submitting the report, and of the land owner and developer (or applicant if not the owner or developer). The date of submittal should also be included. 1 2. Identification of the size and general nature of the proposed project, including any proposed project phases. This paragraph should also include reference to applications that are in process with either City: plat(s), site plans, zoning requests, STORMWATER DESIGN GUIDELINES Page 1 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 SECTION IX APPENDIX D - TECHNICAL DESIGN SUMMARY or clearing /grading permits, as well as reference to any application numbers or codes assigned by the City to such request. 3. The location of the project should be described. This should identify the Named Regulatory Watershed(s) in which it is located, how the entire project area is situated therein, whether the property straddles a watershed or basin divide, the approximate acreage in each basin, and whether its position in the Watershed dictates use of detention design. The approximate proportion of the property in the city limits and within the ETJ is to be identified, including whether the property straddles city jurisdictional lines. If any portion of the property is in floodplains as described in Flood Insurance Rate Maps published by FEMA that should be disclosed. 1 4. The hydrologic characteristics of the property are to be described in broad terms: existing land cover; how and where stormwater drains to and from neighboring properties; ponds or wetland areas that tend to detain or store stormwater; existing creeks, channels, and swales crossing or serving the property; all existing drainage easements (or ROW) on the property, or on neighboring properties if they service runoff to or from the property. 1 5. The general plan for managing stormwater in the entire project area must be outlined to include the approximate size, and extent of use, of any of the following features: storm drains coupled with streets; detention / retention facilities; buried 1 conveyance conduit independent of streets; swales or channels; bridges or culverts; outfalls to principal watercourses or their tributaries; and treatment(s) of existing watercourses. Also, any plans for reclaiming land within floodplain areas must be 1 outlined. 6. Coordination and permitting of stormwater matters must be addressed. This is to include any specialized coordination that has occurred or is planned with other entities (local, state, or federal). This may include agencies such as Brazos County government, the Brazos River Authority, the Texas A &M University System, the Texas Department of Transportation, the Texas Commission for Environmental Quality, the US Army Corps of Engineers, the US Environmental Protection Agency, et al. Mention must be made of any permits, agreements, or understandings that pertain to the project. 7. Reference is to be made to the full drainage report (or the Technical Design Summary Report) which the executive summary represents. The principal elements of the main report (and its length), including any maps, drawings or construction documents, should be itemized. An example statement might be: "One -page drainage report dated , one set of construction drawings ( sheets) dated , and a I -page specifications document dated comprise the drainage report for this project." 1 1 STORMWATER DESIGN GUIDELINES Page 2 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D — TECHNICAL DESIGN SUMMARY Part 2 — Project Administration Start (Page 2.1) Engineering and Design Professionals Information Engineering Firm Name and Address: Jurisdiction I S ^ C City: Bryan ? p `� p College Station C) atilt s - - , TX 116 Date of Submittal: 1 Lead Engineer's Name and Contact Info.(phone, e-mail, fax): Other: To 6-C P i� 'p. Sc. kAt -l� , p. •�h/ta,ii'- j 0.Sc- rn v2,�r� v n e � fi 1 ii Al.: lte4' ?, o c) x • 1v yi 4°l l o 1 Supporting Engineering / Consulting Firm(s): Other contacts: N11 N/A 1 Developer / Owner / Applicant Information Developer / Applicant Name and Address: Phone and e-mail: 1 Giw s ?r A)rit 1nWSk0t?S; Ltx Lt�b - i - o � �0 5��e Dp ,C�� G5 rwai kJurIS- � @. Property Owner(s) if not Developer / Applicant (& address): Phone and e-mail: 1 Pt;c, Gig 0 �ve`op-c' _-- Project Identification 1 Development Name: {' \,Q eu c', whrktv «i P V I a c.e_s •JA_ a Is subject property a site project, a single -phase subdivision, or part of a multi -phase subdivision? I I vvt,J*»\ - lit AS If multi - phase, subject property is phase 4 1 of °i Legal description of subject property (phase) or Project Area: (see Section II, Paragraph B -3a) 1 e. 14 o 40 o is D wk o-( Alki C 9 0?- Skty %c 5u 4A-1 ; A - Sl If subject property (phase) is second or later phase of a project, describe general status of all earlier phases. For most recent earlier phase Include submittal and review dates. 1 F kl,a,;t i It , i 6, 1 L, 2 , 213 , 3÷ 4 - ctrm p li:-e . Kc1 -he t,ri ikylpf,617 e014-5tr u c4-i 1 General Location of Project Area, or subject property (phase): V sit ia P. (')- Pit Y J J RD Yi'l. , o- Cfir. "I,eor 1 In City Limits? Extraterritorial Jurisdiction (acreage): Bryan: N M acres. Bryan: N-1/,4» College Station: !U f 14 1 College Station: y • 0 40 acres. Acreage Outside ETJ: Apt I STORMWATER DESIGN GUIDELINES Page 3 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 2 — Project Administration Continued (page 2.2) 1 Project Identification (continued) Roadways abutting or within Project Area or Abutting tracts, platted land, or built subject operty: developments: 1 ;� �� pr �' F� �� Yk��`) � LCtSeS I A, 24- -A- - DiA l-i V° u - ? oovl 1 Named Regulatory Watercourse(s) & Watershed(s): Tributary Basin(s): N t vU vN r - n 1 Y L`S V h.A.` -- S i (v) CELL k. 1 Plat Information For Project or Subject Property (or Phase) Preliminary Plat File #: °I. 5 - 01 )00 C? Final Plat File #: • Date: — 1 Name: CGI 4 1 {, V-.pG - S tA.17k V i cI erw. Status and Vol /Pg: ei,‘,12 Y „ c , {{ (o( :Twat ID 10 If two plats, second name: File #: 1 Status: Date: Zoning Information For Project or Subject Property (or Phase) 1 Zoning Type: iF D 'D xisting r Proposed? Case Code: Case Date Status: I Zoning Type: Existing or Proposed? Case Code: Case Date Status: I Stormwater Management Planning For Project or Subject Property (or Phase) Planning Conference(s) & Date(s): Participants: 1 Nrn 1 Preliminary Report Required? NA Submittal Date Review Date Review Comments Addressed? Yes N/k No In Writing? When? 1 Compliance With Preliminary Drainage Report. Briefly describe (or attach documentation explaining) any deviation(s) from provisions of Preliminary Drainage Report, if any. 1 1 1 STORMWATER DESIGN GUIDELINES Page 4 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 SECTION IX I APPENDIX D — TECHNICAL DESIGN SUMMARY Part 2 — Project Administration Continued (page 2.3) 1 Coordination For Project or Subject Property (or Phase) Note: For any Coordination of stormwater matters indicated below, attach documentation I describing and substantiating any agreements, understandings, contracts, or approvals. Coordination Dept. Contact: Date: Subject: With Other I Departments of N IA- Jurisdiction City (Bryan or College Station) 1 Coordination With Summarize need(s) & actions taken (include contacts & dates): Non jurisdiction I City Needed? , Yes No Coordination with Summarize need(s) & actions taken (include contacts & dates): I Brazos County Needed? Yes No I Coordination with Summarize need(s) & actions taken (include contacts & dates): TxDOT Needed? Yes No 1 Coordination with Summarize need(s) & actions taken (include contacts & dates): TAMUS Needed? 1 Yes No 17 Permits For Project or Subject Property (or Phase) I As to stormwater management, are permits required for the proposed work from any of the entities listed below? If so, summarize status of efforts toward that objective in spaces below. Entity Permitted or Status of Actions (include dates) Approved ? I US Army Crops of Engineers / d u y {'�ZA'� 6 No Yes '' �'rOU Pp) C,0 in IA) - ES w/ p I US Environmental Protection Agency No V Yes 1 Texas Commission on C2taa/ -EI ND i ai 1 P -11-(..421 k j c�- y�fie— AG-Ior Environmental Quality J 17r m -r .4 r P h hz �{ d ) .-t p 11-9- ,E' S 1 No Yes `" S b°6° Brazos River Authority 1 No I/ Yes 1 STORMWATER DESIGN GUIDELINES Page 5 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 3 — Property Characteristics Start (Page 3.1) 1 Nature and Scope of Proposed Work Existing: Land proposed for development currently used, including extent of impervious cover? 1 N o V A ct't- rch Site Redevelopment of one platted lot, or two or more adjoining platted Tots. Development Building on a single platted lot of undeveloped land. Project Building on two or more platted adjoining lots of undeveloped land. I (select all Building on a single lot, or adjoining lots, where proposed plat will not form applicable) a new street (but may include ROW dedication to existing streets). Ni na'ble Other (explain): 1 Subdivision Construction of streets and utilities to serve one or more platted lots. Development Construction of streets and utilities to serve one or more proposed lots on 1 Project lands represented by pending plats. Site proiects: building use(s), approximate floor space, impervious cover ratio. Describe Subdivisions: number of Tots by general type of use, linear feet of streets and I Nature and drainage easements or ROW. Size of 2\ A' o-f -'D Proposed � ��� 1 Project Is any work planned on land that is not platted If yes, explain: 1 or on land for which platting is not pending? VNo Yes N/A FEMA Floodplains 1 Is any part of subject property abutting a Named Regulatory Watercourse No ►/ Yes (Section II, Paragraph B1) or a tributary thereof? Is any part of subject property in floodplain 1 No 1.-- Yes Rate Map �b� I LD2�5D area of a FEMA- regulated watercourse? Encroachment(s) Encroachment purpose(s): Building site(s) Road crossing(s) into Floodplain 1 areas planned? Utility crossing(s) Other (explain): No "/ NO Yes 1 If floodplain areas not shown on Rate Maps, has work been done toward amending the FEMA- approved Flood Study to define allowable encroachments in proposed areas? Explain. 1 NSA 1 1 STORMWATER DESIGN GUIDELINES Page 6 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 3 - Property Characteristics Continued (Page 3.2) Hydrologic Attributes of Subject Property (or Phase) Has an earlier hydrologic analysis been done for larger area including subject property? 1 Yes Reference the study (& date) here, and attach copy if not already in City files. i Ci l D TA 12- — L J f ,� vLP f f��l vL 1.20 O LDt'Vl�- 1N X 1 2 - P NLoo a i'4Socjou ZDt ' Is the stormwater management plan for the property in substantial conformance with the earlier study? Yes ✓ No If not, explain how it differs. 1 1 No If subject property is not part of multi -phase project, describe stormwater management plan for the property in Part 4. ' If property is part of multi -phase project, provide overview of stormwater management plan for Project Area here. In Part 4 describe how plan for subject property will comply therewith. Ni 1 A 1 Do existing topographic features on subject property store or detain runoff? I/ No Yes Describe them (include approximate size, volume, outfall, model, etc). ' Any known drainage or flooding problems in areas near subject property? ✓No Yes Identify: 1 Based on location of study property in a watershed, is Type 1 Detention (flood control) needed? ' (see Table B -1 in Appendix B) /1-119-01-41 f gov;du Detention is required. Need must be evaluated. 1/ Detention not required. What decision has been reached? By whom? 1 1\t/A If the need for How was determination made? Type 1 Detention 1 must be evaluated: N f� 1 STORMWATER DESIGN GUIDELINES Page 7 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 3 — Property Characteristics Continued (Page 3.3) Hydrologic Attributes of Subject Property (or Phase) (continued) Does subject property straddle a Watershed or Basin divide? ✓ No Yes If yes, describe splits below. In Part 4 describe design concept for handling this. Watershed or Basin Larger acreage Lesser acreage 1 Above- Project Areas(Section ti, Paragraph B3 -a) Does Project Area (project or phase) receive runoff from upland areas? V No Yes Size(s) of area(s) in acres: 1) 2) 3) 4) Flow Characteristics (each instance) (overland sheet, shallow concentrated, recognizable concentrated section(s), small creek (non - regulatory), regulatory Watercourse or tributary); 1 Flow determination: Outline hydrologic methods and assumptions: 1 Does storm runoff drain from public easements or ROW onto or across subject property? 111 V No Yes If yes, describe facilities in easement or ROW: Are changes in runoff characteristics subject to change in future? Explain ' N0 Conveyance Pathways (Section II, Paragraph C2) Must runoff from study property drain across lower properties before reaching a Regulatory Watercourse or tributary? No ' Yes Describe length and characteristics of each conveyance pathway(s). Include ownership of 1 property(ies). \W M, NZ-e S_Y\ ) l 5le -AVPAS CUA OASOVCIN ‘S VAdt &Of 9-kiitr- 1 1 STORMWATER DESIGN GUIDELINES Page 8 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 SECTION IX APPENDIX D - TECHNICAL DESIGN SUMMARY Part 3 — Property Characteristics Continued (Page 3.4) Hydrologic Attributes of Subject Property (or Phase) (continued) Conveyance Pathways (continued) Do drainage If yes, for what part of length? % Created by? plat, or easements instrument. If instrument(s), describe their provisions. exist for any part of ' pathvyay(s)? / No Yes ' Where runoff must cross lower properties, describe characteristics of abutting lower property(ies). (Existing watercourses? Easement or Consent aquired ?) Pathway G J 0 U3 -S `P 'c_0ps_ Areas •1 \ JI - co -vvvtl �u o ouN - t-1?- �' Ita v6 stwte- s\\4 v,cadAtS Sy fa-11 C e-k- ' Describe any built or improved drainage facilities existing near the property (culverts, bridges, Tined channels, buried conduit, swales, detention ponds, etc). • YvAStS ' Nearby Drainage Do any of these have hydrologic or hydraulic influence on proposed stormwater ' Facilities design? No V Yes If yes, explain: sAveityx, 1 67tw STORMWATER DESIGN GUIDELINES Page 9 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY ' Part 4 — Drainage Concept and Design Parameters Start (Page 4.1) Stormwater Management Concept Discharge(s) From Upland Area(s) If runoff is to be received from upland areas, what design drainage features will be used to accommodate it and insure it is not blocked by future development? Describe for each area, flow section, or discharge point. 1 1 Discharge(s) To Lower Property(ies) (Section II, Paragraph El) Does project in ude drainage features (existing or future) proposed to become public via platting? 1/ No Yes Separate Instrument? No Yes Per Guidelines reference above, how will Establishing Easements (Scenario 1) runoff be discharged to neighboring Pre - development Release (Scenario 2) ' property(ies)? Combination of the two Scenarios Scenario 1: If easements are proposed, describe where needed, and provide status of actions on each. (Attached Exhibit # ) 't( rY1 CitAjk S V hit- Ut. — C1"\ 8 V Scenario 2: Provide general description of how release(s) will be managed to pre - development conditions (detention, sheet flow, partially concentrated, etc.). (Attached Exhibit # ) 1 1 Combination: If combination is proposed, explain how discharge will differ from pre- 1 development conditions at the property line for each area (or point) of release. 1 If Scenario 2, or Combination are to be used, has proposed design been coordinated with ' owner(s) of receiving property(ies)? No Yes Explain and provide documentation. 1 STORMWATER DESIGN GUIDELINES Page 10 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D — TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.2) 1 Stormwater Management Concept (continued) Within Project Area Of Multi -Phase Project 1 Identify gaining Basins or Watersheds and acres shifting: Will project result in shifting runoff I between Basins or between What design and mitigation is used to compensate for increased runoff Watersheds? from gaining basin or watershed? No 1 Yes I How will runoff from Project 1. With facility(ies) involving other development projects. Area be mitigated to pre- 2 Establishing features to serve overall Project Area. development conditions? 1 Select any or all of 1, 2, 3. On phase (or site) project basis within Project Area. and /or 3, and explain below. 1. Shared facility (type & location of facility; design drainage area served; relationship to size of I Project Area): (Attached Exhibit # ) 'D-u-k- { i u` V brYVQt i G 1 DCaktd WA Cro vv 1-eA I* 1 Co>o..eg- oil downstvei ok i praj :lia — ' 2. For Overall Project Area (type & location of facilities): (Attached Exhibit # ) I 3. By phase (or site) project: Describe planned mitigation measures for phases (or sites) in subsequent questions of this Part. 1 Are aquatic echosystems proposed? , /No Yes In which phase(s) or project(s)? -• a> v, I m >- Are other Best Management Practices for reducing stormwater pollutants proposed? a No L Yes Summarize type of BMP and extent of use: u) c O 0 \k� CfSuC -h �, c� , S,e,e�i vil 1 Z To If design of any runoff - handling facilities deviate from provisions of B -CS Technical I Specifications, check type facility(ies) and explain in later questions. co 2 Detention elements Conduit elements Channel features Q Swales Ditches Inlets Valley gutters Outfalls 1 Culvert features Bridges Other 1 STORMWATER DESIGN GUIDELINES Page 11 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 i 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.3) 1 Stormwater Management Concept (continued) Within Project Area Of Multi -Phase Project (continued) I Will Project Area include bridge(s) or culvert(s)? L No Yes Identify type and general size and In which phase(s). 1 If detention /retention serves (will serve) overall Project Area, describe how it relates to subject I phase or site project (physical location, conveyance pathway(s), construction sequence): 0 4 Cats =4 t-e Eck vk,ext IOC + s 1 co \1ta-ea H ci vet -g-G \IS -e rS a d is r,Lo, � mkt, Avb iAA-A. � fs i O' i n-) C/U-IL -� Irv' 1,ows 0 ~ VIA-Q. 1l1 I Within Or Serving Subject Property (Phase, or Site) If property part of larger Project A ea, is design in substantial conformance with earlier analysis and report for larger area? V Yes No, then summarize the difference(s): 1 1 Identify whether each of the types of drainage features listed below are included, extent of use, and general characteristics. I Typical shape? Surfaces? a; y Steepest side slopes: Usual front slopes: Usual back slopes: I a N 0 Flow line slopes: least Typical distance from travelway: Ta (Attached Exhibit # ) a o typical greatest co m 2 Are longitudinal culvert ends in compliance with B -CS Standard Specifications? I Q Yes No, then explain: a At int sections or otherwise, do valley gutters cross arterial or collector streets? No Yes If yes explain: 1 } V 1 U 1 ) — N 0 a� Are/Valley gutters proposed to cross any street away from an intersection? 0 V No Yes Explain: (number of locations ?) C. CO z ar L tu 1 • 1 STORMWATER DESIGN GUIDELINES Page 12 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.4) I Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) 1 Gutter line slopes: Least 0.1 070 Usual C. e 02o Greatest D • 9 Are inlets recessed on arterial and collector streets? Yes No If "no ", 1 identify where and why. NI ik Will inlets capture 10 -year desi n stormflow to prevent flooding of intersections (arterial with arterial or collector)? Yes No If no, explain where and why not. r• a) I ' Will inlet size and placement prevent exceedin allowable water spread for 10 -year design storm throughout site (or hase)? Yes No If no, explain. ~3 seil 4, IX 1 • Sao curves: Are inlets placed at low points? V Yes No Are inlets and - conduit sized to prevent 100 -year stormflow from ponding at greater than 24 inches? • o V Yes No Explain "no" answers. v /kl -tArl c S � X L I m Will 100 -yr stormflow be contained in combination of ROW and buried conduit on Q whole length of all streets? LV Yes No If no, describe where and why. Do designs for curb, gutter, and inlets comply with B -CS Technical Specifications? Yes No If not, describe difference(s) and attach justification. Are any 12 -inch laterals used? 1/ No Yes Identify length(s) and where 1 used. N N Pipe runs b etween system Typical 1 Longest 1-1) ' = a) access points (feet): 2 Are junction boxes used at each bend? 1/ Yes No If not, explain where w 1 and why. u o L Z E Are downstream soffits at or below upstream soffits? Least amount that hydraulic N Yes V No If not, explain where and why: grade line is below gutter line (system - wide): 1 1 STORMWATER DESIGN GUIDELINES Page 13 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.5) I Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) I Describe watercourse(s), or system(s) receiving system discharge(s) below m (include design discharge velocity, and angle between converging flow lines). o I m 1) Watercourse (or system), velocity, and angle? N c E L -. 0 I a E 2) Watercourse (or system), velocity, and angle? c • 2 r.. o o .— o c CD 1 m E 3) Watercourse (or system), velocity, and angle? y N 41 T W co Cl) C.- 0 1 § 8 a Q E m For each outfall above, what measures are taken to prevent erosion or scour of 8 N receiving and all facilities at juncture? I E. 1 E. 1) m 2 CL 2) m 1 N O 3) I Are swale(s) situated along property lines between properties? No Yes Number of instances: For each instance answer the following questions. Surface treatments (including low -flow flumes if any): I 0 a) II) } Flow line slopes (minimum and maximum): 1 c az 0 1 S) z Outfall characteristics for each (velocity, convergent angle, & end treatment). as I < Will 100 -year design storm runoff be contained within easement(s) or platted drainage ROW in all instances? Yes No If "no" explain: 1 1 1 STORMWATER DESIGN GUIDELINES Page 14 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 i 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.6) I Stormwater Management Concept (continued) I Within Or Serving Subject Property (Phase, or Site) (continued) Are roadside ditches used? 17 No Yes If so, provide the following: L Is 25 -year flow contained with 6 inches of freeboard throughout ? Yes No Are top of banks separated from road shoulders 2 feet or more? Yes No I o Are all ditch sections trapezoidal and at least 1.5 feet deep? Yes No a) For any "no" answers provide location(s) and explain: v as 1 0 If conduit is beneath a swale, provide the following information (each instance). 1 Instance 1 Describe general location, approximate length: I >- Is 100 -year design flow contained in conduit/swale combination? Yes No If "no" explain: m U 1 m Space for 100 -year storm flow? ROW Easement Width Vi Swale Surface type, minimum Conduit Type and size, minimum and maximum I c and maximum slopes: slopes, design storm: 0 c m Inlets Describe how conduit is loaded (from streets /storm drains, inlets by type): C >` as e as 1 U C O 0 o Access Describe how maintenance access is provided (to swale, into conduit): 111 a) o m , - Instance 2 Describe general location, approximate length: 73 E 1 a) co c Is 100 -year design flow contained in conduit/swale combination? Yes No o — o If "no" explain: m , 1 Ea) Space for 100 -year storm flow? ROW Easement Width o 0 ' Swale Surface type, minimum Conduit Type and size, minimum and maximum I = m and maximum slopes: slopes, design storm: c as o CL Inlets Describe how conduit is loaded (from streets /storm drains, inlets by type): m m � I 0 2 Access Describe how maintenance access is provided (to swale, into conduit): 1 1 STORMWATER DESIGN GUIDELINES Page 15 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D — TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.7) 1 Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) I If "yes" provide the following information for each instance: Instance 1 Describe general location, approximate length, surfacing: c I .x n E W 6; Is 100 -year design flow contained in swale? Yes No Is swale wholly 1 c } within drainage ROW? Yes No Explain "no" answers: m • Access Describe how maintenance access is provide: I ' o 0 ' Instance 2 Describe general location, approximate length, surfacing: a) — Cam- 3 (A .a c t 0 0 Is m within 0 drainage design ROW contained Yes No swale? No Explain "no" answers: swale wholly 1 co O = o! Access Describe how maintenance access is provided: _U I 7.73 3 0. Instance 3, 4, etc. If swales are used in more than two instances, attach sheet I providing all above information for each instance. "New" channels: Will any area(s) of concentrated flow be channelized (deepened, widened, or straightened) or otherwise altered? No Yes If only slightly I shaped, see "Swales" in this Part. If creating side banks, provide information below. 2 c Will design replicate natural channel? Yes No If "no ", for each instance o n describe section shape & area, flow line slope (min. & max.), surfaces, and 100 -year I Q O w g desi n flow, and amount of freeboard: to 2 Instance 1: c } a> E a) o Instance 2: a E o I TIA 1 c as Instance 3: 0 1 I STORMWATER DESIGN GUIDELINES Page 16 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.8) 1 Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) I Existing channels (small creeks): Are these used? No Yes If "yes" provide the information below. Will small creeks and their floodplains remain undisturbed? Yes No How 1 many disturbance instances? Identify each planned location: I For each location, describe length and general type of proposed improvement (including floodplain changes): 1 For each location, describe section shape & area, flow line slope (min. & max.), 1 surfaces, and 100 -year design flow. a) c .o Watercourses (and tributaries): Aside from fringe changes, are Regulatory Watercourses proposed to be altered? \/ No Yes Explain below. I a Submit full report describing proposed changes to Regulatory Watercourses. Address E existing and proposed section size and shape, surfaces, alignment, flow line changes, > length affected, and capacity, and provide full documentation of analysis procedures I E and data. Is full report submitted? Yes No If "no" explain: NIP( as All Proposed Channel Work: For all proposed channel work, provide information v requested in next three boxes. I If design is to replicate natural channel, identify location and length here, and describe design in Special Design section of this Part of Report. NiP 1 Will 100 -year flow be contained with one foot of freeboard? Yes No If not, identify location and explain: 1 N [ 1k 1 Are ROW / easements sized to contain channel and required maintenance space? Yes No If not, identify location(s) and explain: 4 1N 1 1 STORMWATER DESIGN GUIDELINES Page 17 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.9) 1 Stormwater Management Concept (continued) - 6 Xi ` T 1 C-4- V Ya Within Or Serving Subject Property (Phase, or Site) (continued) ve 1 How many facilities for subject property project? For each provide info. below. For each dry-type facilitiy: Facility 1 Facility 2 I Acres served & design volume + 10% 100 -yr volume: free flow & plugged Design discharge (10 yr & 25 yr) 1 Spillway crest at 100 -yr WSE? yes no yes no Berms 6 inches above plugged WSE? yes no yes no Explain any "no" answers: I tfl a) } For each facility what is 25 -yr design Q, and design of outlet structure? Facility 1: I o z Facility 2: Do outlets and spillways discharge into a public facility in easement or ROW? I Facility 1: Yes No Facility 2: Yes No If "no" explain: 0 0. 1 o a For each, what is velocity of 25 -yr design discharge at outlet? & at spillway? m Facility 1: & Facility 2: & ii c� Are energy dissipation measures used? location: No Yes Describe type and m c 0 c I a' al 0 2 For each, is spillway surface treatment other than concrete? Yes or no, and describe: Q Facility 1: I Facility 2: For each, what measures are taken to prevent erosion or scour at receiving facility? 1 Facility 1: Facility 2: I If berms are used give heights, slopes and surface treatments of sides. Facility 1: 1 Facility 2: 1 STORMWATER DESIGN GUIDELINES Page 18 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.10) 1 Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) 1 Do structures comply with B -CS Specifications? Yes or no, and explain if "no ": Facility 1; i P N\ J Li 1" Facility 2: c o c U o Iii For additional facilities provide all same information on a separate sheet. Are parking areas to be used for detention? No Yes What is I maximum depth due to required design storm? Roa5lside Ditches: Will culverts serve access driveways at roadside ditches? V No Yes If "yes ", provide information in next two boxes. Will 25 -yr. flow pass without flowing over driveway in all cases? Yes No Without causing flowing or standing water on public roadway? Yes No Designs & materials comply with B -CS Technical Specifications? Yes No 111 Explain any "no" answers: I N co c 1 o Are culverts parallel to public roadway alignment? Yes No Explain: 2 } .Q Creeks at Private Drives: Do private driveways, drives, or streets cross drainage m ways that serve Above - Project areas or are in public easements/ ROW? a) 0 z No Yes If "yes" provide information below. 1 �� I How many instances? Describe location and provide information below. > L ocation 1: I 2 Q Location 2: Location 3: I For each location enter value for: 1 2 3 Design year passing without toping travelway? I Water depth on travelway at 25 -year flow? Water depth on travelway at 100 -year flow? 1 For more instances describe location and same information on separate sheet. I STORMWATER DESIGN GUIDELINES Page 19 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.11) Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) 1 Named Regulatory Watercourses (& Tributaries): Are culverts proposed on these facilities? No Yes, then provide full report documenting assumptions, criteria, analysis, computer programs, and study findings that support proposed 1 design(s). Is report provided? Yes No If "no ", explain: I m Arterial or Maior Collector Streets: Will culverts serve these types of roadways? .c No Yes How many instances? For each identify the m location and provide the information below. I a m Instance 1: >- a I g; Instance 2: c • Instance 3: o o .� Yes or No for the 100 -year design flow: 1 2 3 �Z o Headwater WSE 1 foot below lowest curb top? I E • Spread of headwater within ROW or easement? �; 2 Is velocity limited per conditions (Table C -11)? I •N c Explain any "no" answer(s): ca o c U � I f0 U a o m o Minor Collector or Local Streets: Will culverts serve these types of streets? n No Yes How many instances? for each identify the -0 location and provide the information below: a C , Instance 1: c Instance 2: • m � o Instance 3: c For each instance enter value, or "yes" / no for: 1 2 3 U ro0 O r Design yr. headwater WSE 1 ft. below curb top? .2 - 100 -yr. max. depth at street crown 2 feet or Tess? L I E Product of velocity (fps) & depth at crown (ft) = ? 1: Is velocity limited per conditions (Table C -11)? Limit of down stream analysis (feet)? 1 Explain any "no" answers: 1 1 STORMWATER DESIGN GUIDELINES Page 20 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 11 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.12) 1 Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) I All Proposed Culverts: For all proposed culvert facilities (except driveway /roadside ditch intersects) provide information requested in next eight boxes. Do culverts and travelways intersect at 90 degrees? Yes No If not, 1 identify location(s) and intersect angle(s), and justify the design(s): Does drainage way alignment change within or near limits of culvert and surfaced approaches thereto? No Yes If "yes" identify location(s), describe change(s), and justification: I Are flumes or conduit to discharge into culvert barrel(s)? No Yes If yes, identify location(s) and provide justification: Are flumes or conduit to discharge into or near surfaced approaches to culvert ends? m No Yes If "yes" identify location(s), describe outfall design treatment(s): I c c 0 0 I Is scour /erosion protection provided to ensure long term stability of culvert structural 0 components, and surfacing at culvert ends? Yes No If "no" Identify 1 locations and provide justification(s): I Will 100 -yr flow and spread of backwater be fully contained in street ROW, and /or drainage easements/ ROW? Yes No if not, why not? 1 Do appreciable hydraulic effects of any culvert extend downstream or upstream to I neighboring land(s) not encompassed in subject property? No Yes If "yes" describe location(s) and mitigation measures: 1 1 Are all culvert designs and materials in compliance with B -CS Tech. Specifications? Yes No'' if not, explain in Special Design Section of this Part. 1 STORMWATER DESIGN GUIDELINES Page 21 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.13) I Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) I Is a bridge included in plans for subject property project? ('� No Yes If "yes" provide the following information. Name(s) and functional classification of the roadway(s)? 1 I What drainage way(s) is to be crossed? IC rn P 1 A full report supporting all aspects of the proposed bridge(s) (structural, geotechnical, hydrologic, and hydraulic factors) must accompany this summary report. Is the report I provided? Yes No If "no" explain: I Is a Stormwater Provide a general description of planned techniques: I Pollution Prevention ' fi t i �� ,ex t 'I i To Plan (SW3P) 4'l -' C a established for cx .V-t t e r g bJ `c I m project construction? ✓' ` ifs 1 No ✓ Yes ti` �'��� Special Designs - Non - Traditional Methods 1 Are any non - traditional methods (aquatic echosystems, wetland -type detention, natural stream replication, BMPs for water quality, etc.) proposed for any aspect of subject property project? I/ No Yes If "yes" list general type and location below. 1 1 I Provide full report about the proposed special design(s) including rationale for use and expected benefits. Report must substantiate that stormwater management objectives will not be compromised, and that maintenance cost will not exceed those of traditional design solution(s). Is report provided? Yes No If "no" explain: 1 1 STORMWATER DESIGN GUIDELINES Page 22 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX APPENDIX D - TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.14) Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) Special Designs — Deviation From B -CS Technical Specifications If any design(s) or material(s) of traditional runoff - handling facilities deviate from provisions of B -CS Technical Specifications, check type facility(ies) and explain by specific detail element. Detention elements Drain system elements Channel features Culvert features Swales Ditches Inlets Outfalls Valley gutters Bridges (explain in bridge report) ' In table below briefly identify specific element, justification for deviation(s). Specific Detail Element Justification for Deviation (attach additional sheets if needed) t 1) 2) 3) 4) 5) Have elements been coordinated with the City Engineer or her /his designee? For each item above provide "yes" or "no ", action date, and staff name: 1) i 2 ) 3) 4) 1 5) Design Parameters Hydrology Is a map(s) showing all Design Drainage Areas provided? Yes No Briefly summarize the range of applications made of the Rational Formula: V-V Y1 D Cake/Pet" `r� 1 . Y 1L o G - 6112-4) U 14;f SW/IL pl ct cLt i 1 hA, What is the size and location of largest Design Drainage Area to which the Rational Formula has been applied? it acres Location (or identifier): A. - g STORMWATER DESIGN GUIDELINES Page 23 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D - TECHNICAL DESIGN S Part 4 — Drainage Concept and Design Parameters Continued I Design Parameters (continued) Hydrology (continued) 1 In making determinations for time of concentration, was segment analysis used? No ;/ Yes In approximately what percent of Design Drainage Areas? 60 % As to intensity- duration - frequency and rain depth criteria for determining runoff flows, were any I criteria other than those provided in these Guidelines used? '✓ No Yes If "yes" identify type of data, source(s), and where applied: 1 I For each of the stormwater management features listed below identify the storm return frequencies (year) analyzed (or checked), and that used as the basis for design. I Feature Analysis Year(s) Design Year Storm drain system for arterial and collector streets Ni N/ I Storm drain system for local streets TO 1 D Open channels N /A" Si/A Swale /buried conduit combination in lieu of channel 11 Li 1 Swales 1% i I 1 Roadside ditches and culverts serving them i 1 1 r 1 Detention facilities: spillway crest and its outfall , ' Detention facilities: outlet and conveyance structure(s) r l Detention facilities: volume when outlet plugged ' i n Culverts serving private drives or streets i i ' ` Culverts serving public roadways h r' 1 Bridges: provide in bridge report. Hydraulics I What is the range of design flow velocities as outlined below? Design flow velocities; Gutters Conduit Culverts Swales Channels Highest (feet per second) $ • b3 111 Lowest (feet per second) — 4 . b 1 Streets and Storm Drain Systems Provide the summa . • • ation outlined below: 1 Roughness coefficients used: For street gutters: I For conduit type(s) ��i gf , p Coefficients: 0• b i Z Z • D i 3 1 \\ t( • -�0t C-6 I STORMWATER DESIGN GUIDELINES Page 24 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX APPENDIX D — TECHNICAL DESIGN SUMMARY Part 4 — Drainage Concept and Design Parameters Continued (Page 4.16) Design Parameters (continued) Hydraulics (continued) Street and Storm Drain Systems (continued) For the following, are assumptions other than allowable per Guidelines? Inlet coefficients? S/ No Yes Head and friction losses No Yes Explain any "yes" answer: 1 In conduit is velocity generally increased in the downstream direction? Yes No Are elevation drops provided at inlets, manholes, and junction boxes? v" No Explain any "no" answers: 1 Are hydraulic grade lines calculated and shown for design storm? ✓ Yes No For 100 -year flow conditions? ✓ Yes No Explain any "no" answers: What tailwater conditions were assumed at outfall point(s) of the storm drain system? Identify each location and explain: r� f Q._ .5oT1� oC c `-ScIO+»C e P - Open Channels If a HEC analysis is utilized, does it follow Sec VI.F.5.a? Yes No Outside of straight sections, is flow regime within limits of sub - critical flow? Yes No If "no" list locations and explain: `` ,` fr Culverts If plan sheets do not provide the following for each culvert, describe it here. For each design discharge, will operation be outlet (barrel) control or inlet control? 1 Entrance, friction and exit losses: 1 Bridges Provide all in bridge report A `� • 1 111 STORMWATER DESIGN GUIDELINES Page 25 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 SECTION IX 1 APPENDIX D — TECHNICAL DESIGN SUMMARY I Part 4 — Drainage Concept and Design Parameters Continued (Page 4.17) Design Parameters (continued) Computer Software I What computer software has been used in the analysis and assessment of stormwater management needs and /or the development of facility designs proposed for subject property project? List them below, being sure to identify the software name and version, the date of the I version, any applicable patches and the publisher 1 1 Part 5 — Plans and Specifications 1 Requirements for submittal of construction drawings and specifications do not differ due to use of a Technical Design Summary Report. See Section III, Paragraph C3. 1 Part 6 — Conclusions and Attestation Conclusions 1 Add any concluding information here: t c5 Q p b es w p V i o tA s ot 1 1 00 v4 BLS t& 1 I Attestation Provide attestation to the accuracy and completeness of the foregoing 6 Parts of this Technical Design Summary Drainage Report by signing and sealing below. I `This report (plan) for the drainage design of the development named in Part B was prepared by me (or under my supervision) in accordance with provisions of the Bryan /College Station Unified Drainage Design Guidelines for the owners of the property. All licenses and permits required by any and all state and federal regulatory agencies. for the proposed drainage 1 impro ments have beenued or fall under applicable general permits`'‘ �F 7-1‘ it . . ° °°° ° ° ° °° s 2 (Affix Seal) ,.5 °° o y s L. -- IlTi.j� * ow ; °° V L icensed Professional Engineer 1 JOSEPH P. SCHULTZ c� q j 1 3 ;.9 65889 a4 I State of Texas PE No. 1 / ' (� �1 �` % Q /STELA c° � t -- 1Z3 . 2 7 ‘144.-..p.-- �. I STORMWATER DESIGN GUIDELINES Page 26 of 26 APPENDIX. D: TECH. DESIGN SUMMARY Effective February 2007 As Revised February 2009 1 1 1 1 1 1 1 1 1 APPENDIX B Drainage Area Calculations 1 1 1 1 1 1 1 1 1 1 1 1 1 Castle Rock Subdivision - Phases 7 & 8 Drainage Area Summary I 10 year storm 100 year storm Area, A C t Area # 1 10 Qlo 1 100 Qtoo I 700 (acres) (min) (in /hr) (cfs) 27.4 5.207 3.09 (in /hr) (cfs) 0.990 0.60 7.104 4.22 701 1.280 0.60 28.1 5.130 3.94 7.003 5.38 I 702A 702B 0.490 0.60 27.0 5.251 5.229 1.54 7.163 2.11 0.450 0.60 27.2 1.41 7.133 1.93 703 0.990 0.60 15.0 7.194 4.27 9.732 5.78 I 704A 0.230 0.60 10.0 8.635 1.19 11.639 1.61 704B 0.350 0.60 10.0 8.635 1.81 11.639 2.44 800 1.010 0.60 25.1 5.476 3.32 7.461 4.52 I 801 1.110 0.60 25.3 5.452 3.63 7.428 4.95 802A 0.310 0.60 10.0 8.635 1.61 11.639 2.16 802B 0.770 0.60 25.3 5.452 2.52 7.428 3.43 1 803 0.780 0.60 10.0 8.635 4.04 11.639 5.45 803B 0.580 0.60 15.1 7.171 2.50 9.701 3.38 804 1.060 0.60 16.4 6.883 4.38 9.321 5.93 1 I The Rational Method: Q = CIA 1 = b / (t +d) t, = L /(V"60) Q =Flow (cfs) t = Time of concentration (min) L = Length (ft A = Area (acres) V = Velocity (ft/sec) I C = Runoff Coeff. I = Rainfall Intensity (in /hr) I Brazos County: 10 year storm 100 year storm b =80 b =96 I d =8.5 d =8.0 e = 0.763 e = 0.730 1 1 1 1 1 1 1 1 1 1 1 1 1 APPENDIX C Depth of Flow in Gutter Calculations 1 1 1 1 1 1 1 I 1 1 1 1 $m E e0000 momom I g= . :F& RNNN NNNNNNNNN m if 8 s. 1 88 � e�� N N N N N N NN NN NN NN NNNNNNN N N i RR 1 ,,r s N N N N R NN NN N II >¢MNNNNmNNNNNNN 2 >j8 8w N N ;a- m m m m m m mm mm mm N N N N N s a m I 1 = $mm mmm mNmNN m EB . e e emeN m emeNmm E T d ' o 0 0 0 0 O1 0 0 0 0 o t o 0 o • El 0 0 0 0 0 0 0 0 0 0 • � • N RR ' a ft m 1 N; N 1 <1 11 ”m ti.: l m i i m m i I 11 c 8 0 II crt! m e N N m H � N g e e mN m� Nm g e � `e m m m m o' _° m m w m m m n m mm �m m� $?� � m nn y C N N N r N r r N N C E n N r N r r 9 E N N N N N c 6t8 E o m m g m o g g o o �• g g o m o "� $ I $ $ o m " o o m m o 0 0 EE EE am si 0 0 0 0 0 0 0 0 0 o x o `o > o ` y° o 0 0 0 ER 0 _ a o 0 0 0 0 om o e 9 9 • O J Q 4 v ip O n m • m m n n n n n • m m m m n n n n n v w 1 O p 41 m Q a D) 0 N 2 E N Q u C g.' > �m S ` ' m Q m m G - �j C C O 7 < I p O N m_ 77:1Z •` O O I n Y m n n n n n n n m m m n n n n n ^^ C U U. t m .. p 0 0 C C• _ Q O] Q 00 y Q O1 Q p r .31111 b a l m $! m $ S S a w °o 0 3X . . u u V d G K 8 . . O c N T N 1 1 1 1 1 1 1 1 1 1 1 1 APPENDIX D 1 Inlet Design Summary 1 1 1 1 1 1 1 1 1 Castle Rock Subdivision - Phases 7 & 8 Storm Sewer Inlets in Sump - Design Analysis Inlet Length 010 D10 010 0100 D100 D100 ** No. ft. cfs ft. in. cfs ft. in. 707* 10 5.61 0.351 4.21 7.92 0.441 5.30 1 708 10 5.46 0.345 4.14 7.39 0.421 5.06 1 * Includes bypass flow from upstream inlets on grade ** ROW elevation is 8" above gutter line so 100 -yr storm runoff is contained within ROW 1 Assume 10% clogging for design 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 N N t.[) r CO CCU M I's Cr) LC) to Q w 1 C) r l() d' M CO CO 1 m U 0 0 r ON— 0 0 0 0 $ C NN N O O CO I I-- CO CA CO CO 4 0- C) co 00 I O ) M L) ca - ti 06 M O 4 r 0 r r r r r r r r r J I O N O C7 CO N N to 4.... tt) CO CO CO C[) CO N LO CO 0 U VLO LCD vCO or) ctNv I I to Q r CN IN O C CO >. ° 000000000 m I 4= : to 07 co OD N r 4 0 LO O Nr d" CD ti M O 0 O O a)rChci rsa'rN06 N J o 1 O N CO CO CO r CD CO O r . Ch CO CO Cn CO O CO r C5 U M 07 4 N d' N 06 Ch 1 15 CV o ■ 0 0 Zig 0 0 0 0 I C+1 • O to LC) O LO CC) 0 O O � L , O I 00 CO CD OD OO OD oD c0 U) Cn000000000 I L co co up (O CA c , O ° $,000000 o N o o ° T J 0 CU I C CO Q 112 C >6 = 0) 0 01 c M a) CD 0 a) c • t d E II II_ •O CL "0 N E c 5 L ..-. C v ` U CD O = Cn CT N N , 'U 11 Cl •(.7) a+ U C +. * s * O N n co 7 C6 CT O . U) O °� ° oo�000 '0 0 � � co C 7 c 2 . � =Z 0 0 0 0 ti p - 0 (.0 L fl v) Q Z w ' a d N m m � ° � `o Q • C ,rn ° L Ch .) (1) >r to LLl r N 9— ° c0 = lE _ u) - � ; ° C m O -- .. l . re C n Cn + 0.4 .E Nom-° c c� O y )° x 3 v o o 'c o .- ' f_ 1 +a d 1 1 U o • 3 ca W g C O N 0 U co II u Y II n 1-O2 a 11 W J V +• to N o 11 x 11 II it O > 11 II IT U t/1 * Q co W J C/) F- m c Y Cl W f/) J 1 1 1 1 1 1 1 1 APPENDIX E Pipe Design Summary 1 1 1 1 1 1 1 1 1 1 1 I Castle Rock - Phases 7 & 8 Storm Sewer Pipe Summary (10 -yr Storm) pip Pipe Length Slope Contributing Contributing 010 ` No. Sue Drainage Areas Area Contributing Pipes C Tc 110 010 bypass V Travel Time I (In) (81) ( %) (Acres) (min) (in/hr) (cfs) (cfs) (fps) (sec) (min) 801 18 280.10 1.00 800 1.010 - 0.60 24.80 5.514 3.34 5.00 52 0.87 I I 802 18 30.80 1.00 804 1.060 - 080 16.50 6.862 4.36 - 5.40 6 0.10 803 24 207.80 1.00 800, 804, 801 3.180 801, 802 0.60 25.67 5.407 10.32 - 5.20 40 0.67 I 804 24 180.70 0.90 800, 804, 801, 8026 3.950 801, 802, 803 0.60 26.33 5.328 12.63 - 5.20 35 0.58 805 24 108.50 0.90 800, 804, 801, 8026 3.950 801, 802, 803, 804 0.60 26.91 5.261 12.47 - 5.20 21 0.35 I 706 18 30.80 0.80 803 0.780 0.60 10.00 8.635 4.04 4.56 5.20 6 0.10 707 30 48.40 0.90 800, 804, 801, 802B, 803, 5.310 801, 802, 803, 804, 805, 706 0.60 27.26 5.222 _ 16.64 - 5.20 9 0.16 8038 708 18 265.30 0.80 700 0.990 0.60 27.40 5.207 3.09 - 5.20 51 0.85 709 18 30.80 0.60 703, 704A 1.440 - 0.60 15.00 7.194 6.22 - 5.20 6 0.10 710 24 264.20 0.50 700, 703, 704A, 701, 702 4.640 708, 709 0.60 28.25 5.114 14.24 - 5.20 51 0.85 711 36 125.40 I 0.70 800, 804, 801, 8028, 603, 9.950 801, 802, 803, 804, 805, 706, 707, 0.60 29.10 1 5.026 30.01 - 5.20 24 0.40 8030, 700, 703, 704A, 7048, 708, 709, 710 701, 702 I 712 18 30.80 1.00 7046, 7028 0.800 0.60 27.20 5.229 _ 2.51 3.10 5.20 6 0.10 - 503 36 176.00 0.60 800, 804, 801, 8028, 803, 10.260 801, 802, 803, 804, 805, 708, 707, 0.60 29.50 4.986 30.69 32.12 5.20 34 0.56 8038, 700, 703, 704A, 7046 701, 702A, 7028, 802A 708, 709, 710, 711, 712 Castle Rock -Phase 7 & 8 1 Storm Sewer Pipe Summary (100 -yr Storm) Pipe size Length Slope Contributing Contributing Size No. Drainage Areas Area Contributing in Pipes C Tc 1100 0100 0100 V Travel Time (In) (ft) ( %) (Acres) , (min) (inlhr) _ (cfs) (cis) (fPs) (sec) (min) 801 18 260.10 1.00 800 1.010 0.60 24.80 7.511 4.55 5.00 52 0.87 802 18 30.80 1.00 804 1.060 0.60 16.50 9.294 5.91 5.40 6 0.10 803 24 207.80 1.00 800, 804, 801 3.180 801, 802 0.60 25.67 7.369 14.06 - 5.20 40 0.67 I 804 24 180.70 0.90 800, 804, 801, 8028 3.950 801, 802.803 0.80 26.33 7.264 17.22 5.20 35 0.58 805 24 108.50 0.90 800, 804, 801, 8028 3.950 801, 802.803,804 0.60 26.91 7.176 17.01 520 21 0.35 706 18 30.80 0.80 I 803 0.780 - 0.60 10.00 11.639 5.45 6.58 5.20 6 0.10 707 30 48.40 0.90 800, 804, 801, 8028, 803, 5.310 801, 802, 803804, 805, 706 0.60 27.26 7.125 22.70 5.20 9 0.16 803B 708 18 265.30 0.80 700 0.990 0.60 27.40 7.104 4.22 5.20 51 0.85 709 18 30.80 0.60 703, 704A 1.440 - 0.60 15.00 9.732 8.41 - 5.20 6 0.10 I 710 24 264.20 0.50 700, 703, 704A, 701, 702 4.640 708,709 0.60 28.25 6.982 19.44 5.20 51 0.85 711 36 125.40 0.70 800, 804, 801, 8028, 803, 9.950 801, 802, 803, 804, 805, 706, 707, 0.60 29.10 6.865 40.99 5.20 24 0.40 8038, 700, 703, 704A, 7046 708, 709, 710 701, 702A, 7028 712 18 30.80 1.00 7048 0.800 0.60 27.20 7,133 3.42 4.85 5.20 6 0.10 503 36 176.00 0.60 800, 804, 801, 8028, 803, 10.260 g01, 802, 803, 804, 805, 706, 707, 0.60 29.50 6.811 41.93 43.36 5.20 34 0.56 803B, 700, 703, 704A, 7048 708, 709, 710, 711, 712 701, 702A, 7028, 802A I The Rational Method: 0= CIA l e b l (t +d)' i = L/(V'60) O = Flow (cfs) t = Time of concentration (min) L = Length (ft A = Area (acres) V = Velocity (fUsec) C = Runoff Coeff. I = Rainfall Intensity (mlhr) Brazos County: 10 Year storm, 100 year storm I b =80 96 d = 8.5 d = 8.0 e - 0.763 e - 0.730 1 1 1 °l3�—m 1pp � a O� II n c'.',1 e n In M 1 . -5 N 8 Y �p p = W N N N N N N N N N N N N N I r J m O O N v O < N N A N O b G O O G G G G O O O C C 2 J O ' O O N N N N N 0 ry I i L V c c N O f m N A 0 A. 0 0. E: s I 2 r m m m f,..5 N 100, 2 v 1N0 q v N 02 Nei ri v h m g 6 E m O = N N N N N N N N N N N N N 6 J O N Y 1p N w1 N O LL E° N N N N N N N N N N N C 7 0. j z .°. A M 4 n 8 a °O I Fgg N n m m m o "A ao N N N ry w N N N N N N N N N e O p $ N O O O O 0 2 r r m r m m m il m N pp O tpp N N ° N 10 M N CI O O j N 0 b (� W Fl N N fl N E lh Y N E 1 , Q 01 01 = N N N N N N N N N N N N m m N m O l V O N N O m 3 O m O O M M O O N 8 O � G E V O IV O 6 6 a LL N N N N N N N N N N N N N •a'a .s .G v a v t0 1 O O W O O O j N h it m A A N O O g1 ap O N '"�+ N N N N N N N N N N N N N y$; N N N F Oo Oo O n o n p N N C O O O 0 . 0 2 9- - - m - = m = - m - - m N m m Z N I _ em S . aa� n) L d a, m 2 N v of N n O N u U _ N O Y in N N en u 1 > � O N Y N O N M V 1V �� � J � e 6 a O O m I Y O O O O O 0 a a m y 10 ° g 6 o X a X X n 0 . 0 to ry ., m m W U (7 0 a 0 v 0 0 00 'm m = N G G G G G G G 5.g4it (OmwN B I L of .- ' yy :2R A° O n T. L 6 a C N N l N N O G G 01 m O E O O. O 0 O 0 0 t0 U O w O . 22!!.. 0 0 0 7= m 0 g « zO N m O ° v °m °m, rn w 8 n n n $= 5 > n 0 '0 .n lc 0 n E E t ` o @ € ° ss m m $ E j n ° o ry � o ° m, 8 a 8 n a c E 0 2 `-' M ^ 1°n (0 e5 - a - ° a l+i 'a "a m o a !_^ A m m a Z 2 m I O g linP2 N m m m W° ° V % m 1 . el' G o ° o, ° r o �i a m ° m ° m °m c ° o, $ w N o W m a jp a 0 0 c 0 o 0 `m - c N oo3LO ../ 0 m O N CO C i 65.C'' a m 0 0 2 Y N 2 M °a m N On m Q O^ 21.11.,:... y m 1 „ n N n N v of °D N N 00 nl a e m E E (7 a'v 10 _a '. c c =`o `o m a s 2.wc (0 0 m`° M I Y N a N- 0 O 0 r N N N — " N m m 0 `. N O O V 6 j N O m N o o m w m 8 S m m , 6 `ua' n n 0 0 0 0 `8 8 N : ti a a 0 p ? E2 la r r O ° w 0 0 0 o Dili 2 F 0 tll u � Z .= N 0 v u ro 1 ' o _ a _m s `m n e 2. w W °n �n °e, a F. = Q m 3 N - M C N HI aV N O r U O O d M n v 2. m r N h a Oi 2 A N A u S W N N N N N N N N N N I e7* r N O o u G n G N b 1' m V N �. C� O O O O O O O O 2 E N I G '� Y o N N N N N o N N O N N I p• C V C G r r O G O 7 2 p Tl o n o o O r O 2 m 2 m n m m m I o 8,; 6. O O O N O b a. N W N g ail V 1p O A G W N 11 pp N y N N N N N aN0 N N mN� m N �p 6 J s N m M N I Y P. S N ^ S 2 LL LL C ° m I A E N N N N N N N N N N itt i YY ap �y y X eel Y b 10 O O W W O I C� N h A aD N O aG m N N m 11 N N N � N N N N N N 1 O O O ^ O O O r 2 m r 0:12.§22 1 N 4> f0 n 8 O V O Li N N g UI N Y O A S W N N N N N N N N N N N N N N Om m `m ' m O) O a V M PI O N N O N t C E a LL m N a N e 8.8. N N N N N N N N N N 0.Z. C C yy p � C G .; N 8 (N0 (0 O O W N U B I f W N N N N N N N N N N N N N N m 3 c r N N S O O O O O O O O O 002 m m m r 6 — I r4 w O O tt m a O O t O W M tp :,°,". 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