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Home My WebLink AboutAppendix D - Technical Desgin SummarySECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 2-Proiect Administration I Start (PaQe 2.1) Engineering and Desian Professionals lnfonnation Engineering Firm Name and Address: Jurisdiction ~E. (Ol'bOt, 71 r.J(:;r f3tJGrt t./Eev'<..S City: B,.Yan P.rJ. ~ CfZ,513 x College Station Cou.e.&e E::rrm1w1 Tx:. 77S'f Z Date of Submittal: Lead Engineer's Name and Contact lnfo.(phone, e-mail, fax): Other: ~ /). Yrl-e--rc.AcF. ~~- Supporting Engineering I Consulting Firm(s): Other contacts: Develooer I Owner I Aoolicant lnfonnation Developer I ApP.licant Name and Address: f', Phone and e-mail: &tep~ fVF-"">Ow "PJ:w?-rNeC>, l. , Z.Soo '5o.r!H Le'X:-11$ Avf:. 5-rtC-4o I ';:!,,c_,.;f.h....l ~ -C,c 775t)Z Property Owner(s) if not Developer I Applicant (&address): Phone and e-mail: Project Identification Development Name: C~ ~""6 -lA?t~t~N lmP~v .. · Is subject property a site project, a single-phase subdivision, or part of a multi-phase subdivision? CovY'l~t VC:-If multi-phase, subject property is phase of Legal description of subject property (phase) or Project Area: (see Section II, Paragraph B-3a) IA, I 13 I -z I g ""'h '-{ CtZP-F-~ fY?filPl/J~5 -'7.e:ett6N 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. C/lef7JG ~~ -:?~c.. 3, f'H Or.JE- General Location of Project Area, or subject property (phase): ~ P.eA,~£ !~it.<{-.~ P~c~r-. i?OMJ 1Ah7 In City Limits? Extraterritorial Jurisdiction (acreage): Bryan: acres. Bryan: College Station: College Station: L'D acres. Acreage Outside ET J: STORMINATER DESIGN GUIDELINES Effective February 2007 Page 3 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 2-Project Administration I Continued (page 2.2) Project Identification (continued) Roadways abutting or within Project Area or Abutting tracts, platted land, or built ~-=e~t~.E ~ w~ developments: 6rfZP.Jj.JS Pt<Ar ie.1 IC--L reA t L Ro..,~t'?.. ~() Named Regulatory Watercourse(s) & Watershed(s): Tributary Basin(s): Jr4~. ~ oF 6w-rl-J ~ r~. Plat Information For Project or Subject Property (or Phase) Preliminary Plat File#: ___ _ Final Plat File#: ______ Date: ____ _ Name: Status and Vol/Pg: If two plats, second name: File#: ____ _ Status: Date: ___ _ Zoning Information For Project or Subject Property (or Phase) Zoning Type: -POD (fxistin~or Proposed? Case Code: ____ _ Case Date Status: Zoning Type: Existing or Proposed? Case Code: ____ _ Case Date Status: ----- Stormwater Management Planning For Project or Subject Property (or Phase) Planning Conference(s) & Date(s): Participants: Preliminary Report Required? ___ Submittal Date _____ Review Date----- Review Comments Addressed? Yes __ No__ In Writing? __ _ When? ____ _ Compliance With Preliminary Drainage Report. Briefly describe (or attach documentation explaining) any deviation(s) from provisions of Preliminary Drainage Report, if any. STORMWATER DESIGN GUIDELINES Effective February 2007 Page 4 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 2 -Project Administration I Continued (page 2.2) Project Identification (continued) Roadways abutting or within Project Area or Abutting tracts, platted land, or built subject property: ~w~ developments: Grfa:=-VJS Azlt, (:!.} £ Gpz..F....JJ.Js Pt<Arie.re -C-,vJ1 L Rc-1~iG ~o Named Regulatory Watercourse(s) & Watershed(s): Tributary Basin(s): ~6. '20> oF0wt&J .~ C'~. Plat Information For Project or Subject Property (or Phase) Preliminary Plat File#: Final Plat File #: Date: Name: Status and Vol/Pg: If two plats, second name: File#: Status: Date: Zoning Information For Project or Subject Property (or Phase) Zoning Type: POD ~in~or Proposed? Case Code: Case Date Status: Zoning Type: Existing or Proposed? Case Code: Case Date Status: Stormwater Management Planning For Project or Subject Property (or Phase) Planning Conference(s) & Date(s): Participants: Preliminary Report Required? Submittal Date Review Date Review Comments Addressed? Yes --No --In Writing? When? Compliance With Preliminary Drainage Report. Briefly describe (or attach documentation explaining) any deviation(s) from provisions of Preliminary Drainage Report, if any. STORMWATER DESIGN GUIDELINES Effective February 2007 Page 4of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX 0 -TECHNICAL DESIGN SUMMARY· Part 2 -Proiect Administration I Continued (page 2.3) Coordination For Project or Subject Property (or Phase) Note: For any Coordination of stormwater matters indicated below, attach documentation describing and substantiating any agreements·, understandings, contracts, or approvals. Coordination Deot Contact: Date: Subiect: With Other Departments of Jurisdiction City (Bryan or College Station) Coordination With Summarize need(s) & actions taken (include contacts & dates): Non-jurisdiction City Needed? X Yes __ No __ Coordination with Summarize need(s) & actions taken (include contacts & dates): Brazos County Needed? Yes --No~ Coordination with Summarize need(s) & actions taken (include contacts & dates): TxDOT Needed? Yes No')( -- Coordination with Summarize need(s) & actions taken (include contacts & dates): TAMUS Needed? Yes __ NoX Permits For Project or Subject Property (or Phase) 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 obiective in soaces below. Entity Permitted or Status of Actions (include dates) Aooroved? US Army Crops of Engineers No-X_ Yes_ US Environmental Protection Agency NoX Yes_ SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 3 -Proeertv Characteristics I Start (Page 3.1) Nature and Scope of Proposed Work Existing: Land proposed for development currently used, including extent of impervious cover? Site __ Redevelopment of one platted lot, or two or more adjoining platted lots. Development __ Building on a single platted lot of undeveloped land. Project __ Building on two or more platted adjoining lots of undeveloped land. (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). __ Other (explain): Subdivision _x_ 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 Project lands represented by pending plats. Site projects: building use(s), approximate floor space, impervious cover ratio. Describe Subdivisions: number of lots by general type of use, linear feet of streets and Nature and drainage easements or ROW. be-r!UV(r~ fJotJoS Size of fYloD1 fiorrr~S. oP-fi;.KC !:7-f I Nla- Proeosed 1-4 r Project Is any work planned on land that is not platted If yes, explain: or on land for which platting is not pending? _x_ No --Yes FEMA Floodplains Is any part of subject property abutting a Named Regulatory Watercourse I No_K_ Yes __ (Section II, Paragraph B1) or a tributary thereof? Is any part of subject property in floodplain I No_x_ Yes Rate Map area of a FEMA-regulated watercourse? -- Encroachment(s) Encroachment purpose(s): __ Building site(s) __ Road crossing(s) into Floodplain areas planned? __ Utility crossing(s) __ Other (explain): No _x_ Yes -- 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. o~~ttJ'IH~ 8-TC){)'-I I NCL.tJD'fiLJ I f?lirn~ Dl:J-l A I Its ii f!a-IZA-S /V?ooa . (fir~ IY'ki;,FZL ~ tY""a:.N uP.JJ;:,--rex> ro 1AJ<:.1-vD12 ~_.u-c¢1 1m1-'12.ov.e/Yl J21\/-1S. STORMWATER DESIGN GUIDELINES Effective February 2007 Page 6 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 3 -ProQertv Characteristics I · Start (Page 3.1) Nature and Scope of Proposed Work . Existing: Land proposed for development currently used, including extent of impervious cover? Site __ Redevelopment of one platted lot, or two or more adjoining platted lots. Development __ Building on a single platted lot of undeveloped land. Project __ Building on two or more platted adjoining lots of undeveloped land. (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). __ Other (explain): Subdivision _K__ 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 Project lands represented by pending plats. Site projects: building use(s), approximate floor space, impervious cover ratio. Describe Subdivisions: number of lots by general type of use, linear feet of streets and Nature and drainage easements or ROW. /)e-rFU-.J7r~ Pc,"10$ Size of fYloD1 nor-rr iSN5 6P-0Kc~-t I f'l"G:r Proeosed 1-tJ r Project Is any work planned on land that is not platted If yes, explain: or on land for which platting is not pending? __x__ No --Yes FEMA Floodplains ·1s any part of subject property abutting a Named Regulatory Watercourse I N X y (Section 11, Paragraph 81) or a tributary thereof? 0--es --Is any part of subject property in floodplain I No_K__ Yes Rate Map area of a FEMA-regulated watercourse? --Encroachment(s) Encroachment purpose(s): __ Building site(s) __ Road crossing(s) into Floodplain areas planned? __ Utility crossing(s) __ Other (explain): No _2i_ Yes --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. 0~<41N'A-L 5-rC)[J'f 1N'CLUD1W, f?ldr7r..te. Dn-tA J /-JS il /-/a-R.A-s /YloDa . {fie;;,, ff/ciJFU_ ~ e:;-z.UJ uP.i'.lA'7t:.4'.'.'.> -ro 1 AIC.L..v0£ £.p_.c_r~ 1 m P12ov~rYl /Gl\HS. STORMWATER DESIGN GUIDELINES Effective February 2007 Page 6 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 3 -ProR!m Characteristics I Continued (Page 3.2) Hydrologic Attributes of Subject Property (or Phase) Has an earlier hydrologic analysis been done for larger area including subject property? yz Reference the study (&date) here, and -attach copy if not already in City files. C~~ 1¥1~. -Ot'l.t&rttJ1'\. ~lN~ &-r@V {/YlRr/lc/1-8, 2007) Is the stormwater management plan for the property in substantial conformance with the earlier study? Yes K No If not, explain how it differs. y IN~*GJ rllr l\JO.-Z.. moD f A&+-rtc$\I::;, IY1J1C>R... ~ 9Pec1P1f:.t10 11\J -rl-hc. UPOFH£ ~. No If subject property is not part of multi-phase project, describe stormwater management plan for the property in Part 4. --If property !! 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. Do existing topographic features on subject property store or detain runoff? __ No ~Yes Describe them (include approximate size, volum~. outfall, model, etc). W6tL ""'to~£ "lJ t:)f. 1:/tzAlN/lo.C:A'E. 5-"f ~"-I Any known drainage or flooding problems in areas near subject property? _;s._ No --Yes Identify: Based on location of study property in a watershed, is Type 1 Oetentio·n (flood control) needed? (see Table B-1 in Appendix B) L Detention is required. --Need must be evaluated. __ Detention not required. What decision has been reached? By whom? .. °£)<lbt 'NC:,r 'f}(2.A \Nf\C::tE CONc1-r\()f\J If the need for How was determination made? Type 1 Detention must be evaluated: SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 3 -ProRertv Characteristics l Continued (Page 3.3) Hydrologic Attributes of Subject Property (or Phase) (continued) Does subject property straddle a Watershed or Basin divide? __ No x_ Yes If yes, describe splits below. In Part 4 describe desian concept for handling this. Watershed or Basin Larger acreage Lesser acreage P.A. "'Ji(t'' :2.Co~ l/.A. tr:pi'' //.5 .. Above-Project Areas(Section II, Paragraph 83-a} Does Project Area (project or phase} receive runoff from upland areas? _·_No X Yes Size(s} of area(s) in acres: 1) (V.?n 2} 3} 4) Flow Characteristics (each instance) (overland sheet, shallow concentrated, recognizable concentrated section(s}, small creek (non-regulatory}, regulatory Watercourse or tributary); OJfi.JIZLP,J[) 7Htz.rVI Fiew ~ ~tfl} Lt.°"'-1 C<JNCl&NIV2A'1ofJ Fi.oi..u ~ !3K6--ftN&. C~N£L 'EZcw -2-2.'f(I 12.GP r.Jf'J DFY<. Gttee.tGAJS AzA, le/£ l2.o1te W~S/ Flow determination: Outline hydrologic methods and assumptions: :;;cg, --rte..'2.o fY/£7H-oD Does storm runoff drain from public easements or ROW onto or across subject property? _K._No --Yes If yes, describe facilities in easement .or ROW: Are changes in runoff characteristics subject to change in future? Explain ._ '/e,s, / f7ec-r1otJ IC W/C...c_ f//}JF-It Dr:zrr~10"1 PA Cl,_ ( "7'-1 Conveyance Pathways (Section II, Paragraph C2} Must runoff from study property drain across lowKroperties before reaching a Regulatory Watercourse or tributary? No Yes Describe length and characteristics of each conveyance pathway(s). Include ownership of property(ies}. I~ t?o-rfJrf2t.{ '20 STORMWATER DESIGN GUIDELINES Effective February 2007 op-&o-rr1 Page 8of26 f e.Aet+ ( (2.E,FG ~ APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 3 -Pro~ertv Characteristics I ·Continued (Page 3.3) Hydrologic Attributes of Subject Property (or Phase) (continued) Does subject property straddle a Watershed or Basin divide? No X Yes If yes, describe splits below. In Part 4 describe desion concept for handling this. Watershed or Basin Larger acreaQe Lesser acreage T>.A. I"(~ l "\\ 2..U:><"l t/.A. '':PI,, //.5 . . Above-Project Areas(Section II, Paragraph 83-a). Does Project Area (project or phase) receive runoff from upland areas? __ No XYes Size{s) of area{s) in acres: 1) ""'.7 "{) 2) 3) 4) Flow Characteristics (each instance) (overland sheet, shallow concentrated, recognizable concentrated section(s), small creek (non-regulatory), regulatory Watercourse or tributary); Ov~tJO 7HTZriTf Flf)w ~ ;?t+IJ Lt-OV0 CctJ(,fC,(\f(v2J+"7ofJ Fi.ow-? !3K1~-r,NC.. C~N£L 'EZow -2-2.Y'' 12.c...f> C/f'JDFY<. Gttee.JCAJS (lzA1ie1c 12oFt:D Wi:;-SI Flow determination: Outline hydrologic methods and assumptions: ~!!:> --rte. '2.o fY/£7' 1-}o-f) Does storm runoff drain from public easements or ROW onto or across subject property? ___K__ No __ Yes If yes, describe facilities in easement .or ROW: Are changes in runoff characteristics subject to change in future? Explain ~ '/es, / f?e.c -r1010 JC Wik f/l.}J~ It D0-r~rot-..f PAc11-17'-I Conveyance Pathways (Section II, Paragraph C2) Must runoff from study property drain across lowKroperties before reaching a Regulatory Watercourse or tributary? No Yes Describe length and characteristics of each conveyance pathway(s). Include ownership of property(ies ). (~ e:;,o-rfJ'2"i Qo STORMWATER DESIGN GUIDELINES Effective February 2007 oF &v-rr1 Page 8 of26 f !2Ae f! Cree-~ Kv APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 3 -Proeeax Characteristics I 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 pathway(s)? _){_No Yes -- Where runoff must cross lower properties, describe characteristics of abutting lower property(ies). (Existing watercourses? Easement or Consent aquired?) Pathway F'l:r~i "1 (:;,-( fZI '&J-t f¥!J-1 Areas Describe any built or improved drainage facilities existing near the property (culverts, bridges, lined ch_annels, buried conduit, swales, detention ponds, etc). F-Y::tt;rl'r NGr C. t.Y/,.. VIC.lfZ..-f '=-UND~ l2o '-'D£.f'l. eo~ JU~ ~v.Jl\b~ OP {f/£ Cer-EJ..<:.. n1~w f?v:B>t::>1 V (f;,foN --r~ s-r r20C-rve£.!;, ~ Nearby ~ C::rN (Pt Cfi-w-1'~ 'I VfVJ)~ S!~JUJ. Drainage Do any of these have hydrologic or hydraulic influence on proposed stormwater Facilities design? __ No ...){._Yes If yes, explain: -( tfe_t::J(Z. e vz...voc-rs dPAc~{t-frue. 1mPAcrs WP~ .l\J(}( tA1CLuf::£JO ("' IH£ Hee-~ fl1ot>e..L. STORMWATER DESIGN GUIDELINES Effective February 2007 Page 9 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage ConceQt and Design Parameters I Start (Page 4.1} Stonnwater 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. r;x:rSrr1 rJGr 9'7-C)£wt ~ o.L. 8 'ib-rftJNl b /J(Z£ IN Pcfierc_. f2vNDPP 7o t2!2.CJIW£ f?tG£-lJsvJ;L.~Av1 ~ 01-r~ Discharge(s) To Lower Property(ies) (Section II, Paragraph E1) Does project include drainage features (existing or future) proposed to become public via platting? _x_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# ) Scenario 2: Provide general description of how release(s) will be managed to pre-development conditions (detention, sheet flow, partially concentrated, etc.). (Attached Exhibit# ) J7e.-rft.N1 ( 0 ,.J rAc.1 ,_r-rrP-7:::> (Po No I -rilrz......, q] Combin;:!tion: If combination is proposed, explain how discharge will differ from pre- development conditions at the property line for each area (or point) of release. If Scenario 2, or Combination are to be used, has proposed design been coordinated with owner(s) of receiving property(ies)? documentation. STORMWATER DESIGN GUIDELINES Effective February 2007 No Page 10 of26 --Yes Explain and provide APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Concegt and Design Parameters I Start (Page 4.1) Stonnwater 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. 'PA <Srfr rJ Gr f7rai!.-wt ~ OL 8<-ib-rtWV? b 11r'ZE. IN p c,I).(__£_ --to ~iW£ f? IC.,£-.lJ& v,f; t..~ Av1 fCl.Y7 f2vNDPP k?A-r~ Discharge(s) To Lower Property(ies) (Section If, Paragraph E1) Does project include drainage features (existing or future) proposed to become public via platting? -X-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 # ) Scenario 2: Provide general description of how release(s) will be managed to pre-development conditions (detention, sheet flow, partially concentrated, etc.). (Attached Exhibit# ) Pe.-rers-1, o "1 rAc.1 l-17rP-?::> (f>oNo I 11-1rz.u q] Combination: If combination is proposed, explain how discharge will differ from pre- development conditions at the property line for each area (or point) of release. 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. STORMWATER DESIGN GUIDELINES Effective February 2007 Page 10 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TE.CHNICAL DESIGN SUMMARY Part 4 -Drainage Concept and Design Parameters I Continued (Page 4.2) Stormwater Management Concept (continued) Within Project Area Of Multi-Phase Project Identify gaining Basins or Watersheds and acres shifting: Will project result in shifting runoff P.A. P1~Hft~1 r.JC::r -z"'o Pol\/)~ between Basins or 1-------------------------,.,..-----1 between What design and mitigation is used to compensate for increased runoff Watersheds? from gaining basin or watershed? 0 __ __ No ~.ND 5 <.JJ~ D~~fU) --1'"<;) ~uCJE._ ~Yes ~~~ _o~G1"1/3t._ //12.E-IJE.VF-t.bPM~ How will runoff from Project Area be mitigated to pre- development conditions? Select any or all of 1, 2, and/or 3, and explain below. 1. _. __ · With facility(ies) involving other development projects. 2.1_ Establishing features to serve overall Project Area. 3. _l;:__ On phase (or site) project basis within Project Area. 1. Shared facility (type & location of facility; design drainage area served; relationship to size of Project Area): (Attached Exhibit# ) 2. For Overall Project Area (type & location of facilities): (Attached Exhibit# ) ro~ 1-1 3. Bv phase (or site) project: Describe planned mitigation measures for phases (or sites) in subsequent questions of this Part. Are aquatic echosystems proposed? __ No __ Yes In which phase(s) or SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Concept and Design Parameters I Continued (Page 4.3) Stormwater Management Concept (continued) Within Project Area Of Multi-Phase Project (continued) Will Project Area include bridge(s) or culvert(s)? _x_ No __ Yes Identify type and general size and In which phase(s). If detention/retention serves (will se.rve) overall Project Area, describe how it relates to subject phase or site project (physical location, conveyance pathway(s), construction sequence): FoNv /-'-/ WJ~ ~ S.e.c.-rc~ IA I rl3~ ~( 3 '¥-'"-/ oF Gf?.F_y_w:... M~o~ ~1v1b1~rJ . Within Or Serving Subject Property (Phase, or Site) If property part of larger Project Area, is design in substantial conformance with earlier analysis and report for larger area? --X-Yes No, then summarize the difference(s): C>f<!.r~"'Pr<-~Pc>e.-r ( 3/ e)-u-r). Identify whether each of the types of drainage features listed below are included, extent of use, and general characteristics. Typical shape? I Surfaces? Steepest side slopes: Usual front slopes: I Usual back slopes: Flow line slopes: least. ____ _ Typical distance from travelway: typical greatest~ ___ _ (Attached Exhibit # ) Are longitudinal culvert ends in compliance with B-CS Standard Specifications? ___ Yes No, then explain: At intersections or otherwise, do valley gutters cross arterial or collector streets? ___ No __ Yes If yes explain: Are valley gutters proposed to cross any street away from an intersection? . __ No __ Yes Explain: (number of locations?) STORMWATER DESIGN GUIDELINES Effective February 2007 Page 12 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Concept and Design Parameters I Continued (Page 4.3) Stormwater Management Concept (continued) Within Project Area Of Multi-Phase Project (continued) Will Project Area include bridge(s) or culvert(s)? -1._ No __ Yes Identify type and general size and In which phase(s). If detention/retention serves (will serve) overall Project Area, describe how it relates to subject phase or site project {physical location, conveyance pathway(s), construction sequence): fc;:ND r-4 W/IA_ ~ 8.£.c:-rc~ IA I r8.) '2-, '3 ¥-''-/ oF CIC..F......Y~ M~o~ ~1v1>1r:::.rJ, Within Or Serving Subject Property (Phase, or Site) If property part of larger Project Area, is design in substantial conformance with earlier analysis and report for larger area? -X-Yes No, then summarize the difference(s): tJ!ZrG.-<NltL ~PDe.-r ( 3/ e)c:rr). Identify whether each of the types of drainage features listed below are included, extent of use, and general characteristics. C'-· -0 C1> I/) ~ C1> I/) >-~ I .B 'i5 ~ 0 z 1~1 ~ <( I/) ..0 Q) ~~>-I ..c: Q) -I/) ·;: ~ I/) C1> -::::: Q) ::J 0 ~ 0>Z ~~I Typical shape? I Surfaces? Steepest side slopes: I Usual front slopes: I Usual back slopes: Flow line slopes: least. ____ _ Typical distance from travelway: typical greatest'------(Attached Exhibit # ) Are longitudinal culvert ends in compliance with B-CS Standard Specifications? ___ Yes No, then explain: At intersections or otherwise, do valley gutters cross arterial or collector streets? ___ No __ Yes If yes explain: Are valley gutters proposed to cross any street away from an intersection? . __ No __ Yes Explain: (number of locations?) STORMWATER DESIGN GUIDELINES Effective February 2007 Page 12 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX AP~ENDIX D .-TECHNICAL DESIGN ·suMMARY Part 4 -Drainage Conceet and Design Parameters. I Continued (Page 4.4) Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site)_ (continued) Gutter line slopes: Least Usual Gre~test Are inlets recessed on arterial and collector streets? __ Yes --No If "no·, identify where and why. Will inlets capture 10-year design stormflow to prevent flooding of intersections {arterial with arterial or collector)? --Yes· --No If no, explain where and why not. ('-- "tJ Q) Ill Will inlet size and placement prevent exceeding allowable water spread for 10-year :::J ..... design storm throughout site {or phase)? Yes No If no, explain. Q) ----:i::: :::J Cl "tJ -c: "tJ C\1 Q) Sag curves: Are inlets placed at low points? Yes No Are inlets and ..0 ~ conduit sized to prevent 100-year stormflow from ponding at greater than 24 inches? ..... ~ :::J c: u 0 --Yes No Explain "no• answers. .s:: u --'§.- .!!! .. Q) ~ -Ill ~ Will 100-yr stormflow be contained in combination of ROW and buried conduit on c:( whole length of all streets? Yes No If no, describe where and why. -- -- Do designs for curb, gutter, and inlets comply with 8-CS Technical Specifications? Yes --No If not, describe difference{s) and attach justification. Are any 12-inch laterals used? _1S.t_ No --Yes Identify length{s) and where used. ('-- "tJ Pipe runs between system I Typical 17 Gf/ Q) Ill Longest Ill Q) access points {feet): :::J >-E _L Yes ~I Are junction boxes used at each bend? --No If not, explain where and why. Ill .E o !!z i I Are downstream soffits at or below upstream soffits? Least amount that hydraulic Ill .!! Yes -15.__ No __ If not, explain where and why: grade line is below gutter line {system-wide): P-.1--/ .. C/2 STORMWATER DESIGN GUIDELINES Effective February 2007 Page 13 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.5) Stormwater Management Concept (continued)· Within Or Serving Subject Property (Phase, or Site) (continued) en Describe watercourse(s), or system(s) receiving system discharge(s) below Cl) (include design discharge velocity, and angle between converging flow lines). 0 c: 1) Watercourse (or system), velocity, and angle? Ill (ii Fo('Jo 00 .5 I-I'?~ (.p . f-p~ -Cl) ..... ........ 0 1l E 2) Watercourse (or system}, velocity, and angle? ::I ..... . 5 .E "E· 0 .E ~-5 E Cl) ~ Cl) E 3) Watercourse (or system), velocity, and angle? -Ill ~ If) If) ill Cl) :J c: 32 0 ·-> ~ e "O a. E G> For each outfall above, what measures are taken to prevent erosion or scour of 0 Cl) receiving and all facilities at juncture? fc. -.s::: en If) 1 > %c. \C. Re P -f<J+F CA<.JvO IN (oNC£e;-(FE. Cl) -Ill ..... ~ Ill 2) a. Cl) If) c: 3) ~ 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): ~ If) Q) ~If) -Cl) Flow line slopes (minimum and maximum): If)>-c: ~ I 1l 0 ~z Outfall characteristics for each (velocity, convergent angle, & end treatment). ~~ ~ If) ~ <{ Will 100-year design storm runoff be contained within easement(s) or platted drainage ROW in all instances? --Yes --No If "no· explain: STORMWATER DESIGN GUIDELINES Effective February 2007 Page 14 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised Februarv 2009 SECTION .IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Concept and Design Parameters I Continued (Page 4.5) Stormwater Management Concept (continued)· Within Or Serving Subject Property (Phase, or Site) (continued) Ii) Q) 0 c cu iii £ ~ -o al E :J ._ .5 .E c: . 0 .E ~-5 ~ E .... cu (/) (/) 1:) Q) c :E ·-> ~ ~ "C a. E Qi 0 Q) -.i::. en (/) C'-· "* Q) iii ._ cu a. Q) (/) c ~ Q) (/) .!!: Q) (/) >- ! I .9 al 0 <llZ :J ~~ (/) Q) ~ § ~ :J .o Describe watercourse(s), or system(s) receiving system discharge(s) below (include design discharge velocity, and angle between converging flow lines). 1) Watercourse (or system), velocity, and angle? ror-Jo I -13~(p Ip~ -0° 2) Watercourse (or system), velocity, and angle? 3) Watercourse (or system), velocity, and angle? For each outfall above, what measures are taken to prevent erosion or scour of receiving and all facilities at juncture? /J 1) l<ocK:.-R{P -f<A.P r~ IN LoNCACe-fFC 2)~ 3) 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): Flow line slopes (minimum and maximum): Outfall characteristics for each (velocity, convergent angle, & end treatment). Will 100-year design storm runoff be contained within easement(s) or platted drainage ROW in all instances? __ Yes __ No lf"no" explain: STORMWATER DESIGN GUIDELINES Effective February 2007 Page 14 of 26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised Februarv 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.6) Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) Are roadside ditches used? No __ Yes If so, provide the following: f/I Is 25-year flow contained with 6 inches of freeboard throughout? __ Yes No Q) --.s::. ~ Are top of banks separated from road shoulders 2 feet or more? __ Yes --No 0 Are all ditch sections trapezoidal and at least 1.5 feet deep? Yes No Q) -----0 For any "no" answers provide location(s) and explain: ·;;; -0 111 0 a::: If conduit is beneath a swale, provide the following information (each instance). Instance 1 Describe ·general location, approximate length: f/I Q) Is 100-year design flow contained in conduit/swale combination? Yes No >-----I! If "no" explain: c: Space for 1 00-year storm flow? ROW Easement Width 0 .l!l z f/I Swale Surface type, minimum Conduit Type and size, minimum and maximum ~~ and maximum slopes: slopes, design storm: 0 ;; ~· '6 f/I a; -0 Inlets Describe how conduit is loaded (from streets/storm drains, inlets by type): 111 c: >. c: 111 c: .s::. 111 (.) ... c: ~ Q) c: Access Describe how maintenance access is provided (to swale, into conduit): a. 0 0 ~ .... 111 0 E :::J ... ~ ~ .5 .5 Q) Instance 2 Describe general location, approximate length: -0 E Q) (IJ f/I f/I :::J f/I Q) Is 100-year design flow contained in conduit/swale combination? c: -0 Yes No 0 ·5 ----;; e If "no" explain: 111 c: a. :0 -Q) Space for 100-year storm flow? ROW Easement E Q) Width 0 .s::. (.) f/I Swale Surface type, minimum Conduit Type and size, minimum and maximum ;t::: .!! :::J ~ and maximum slopes: slopes, design storm: -0 c: 111 0 a. ~ Q) Inlets Describe how conduit is loaded (from streets/storm drains, inlets by type): Q) ,,, ~ c: .£. ,,, ~ Access Describe how maintenance access is provided (to swale, into conduit): . < SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Concel;!t and Design Parameters j Continued (Page 4. 7)- Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) If "yes" provide the following information for each instance: Instance 1 Describe general location, approximate length, surfacing: c: ·n; E a. x 0 w .:::: :a:: u; Is 100-year design flow contained in swale? Yes No Is swale wholly 0 Cl> --c: ,.I within drainage ROW? Yes No Explain "no" answers: ::i ----... Cl> > ·a; Access Describe how maintenance access is provide: 0 Cl> ... 0 .... z ·5 ]~ Instance 2 Describe general location, approximate length, surfacing: QJ ·;:: <'· ::i (/) .0 "E .... Cl> ::i E 0 £ Cl> (/) Is 100-year design flow contained in swale? Yes No Is swale wholly -~ Cll ---- (/) QJ within drainage ROW? __ Yes No Explain "no" answers: ... ~ 0 -- Cll s: ~o ~ a::: Access Describe how maintenance access is provided: .2 15 ::i a. Instance 3, 41 etc. If swales are used in more than two instances, attach sheet 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 ----shaped, see "Swales" in this Part. If creating side banks, provide information below. <'· -0 .5 Will design replicate natural channel? Yes No If "no", for each instance QJ -----(/) Cll describe section shape & area, flow line slope (min. & max.), surfaces, and 100-year 0 -a. a. e in design flow, and amount of freeboard: a. Instance 1: (/) (/) "E QJ QJ >- E I QJ > Instance 2: e a. E 0 z i~ Instance 3: 0 STORMWATER DESIGN GUIDELINES Effective February 2007 Page 16 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage ConceQt and Design Parameters I Continued (Page 4.7)· Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) If "yes" provide the following information for each instance: Instance 1 Describe general location, approximate length, surfacing: c: "iii E c. x 0 w ~ :i:: ui Is 100-year design flow contained in swale? --Yes --No Is swale wholly 0 Q) within drainage ROW? Yes No Explain "no" answers: c: >---2 I -- Cl) > "iii Access Describe how maintenance access is provide: u Cl) ._ 0 ....... z ::::J 1~ Instance 2 Describe general location, approximate length, surfacing: Cl) ·c <'· ::::J Ill ..0 c "5 Q) 0 E £ cu Ill Is 100-year design flow contained in swale? Yes No Is swale wholly "§ 111 ----Q) within drainage ROW? __ Yes No Explain "no" answers: Ill ._ Cl) 0 --ro ~ :;: Ill 0 ~ 0:: Access Describe how maintenance access is provided: -~ ::0 ::::J a. Instance 3, 4, etc. If swales are used in more than two instances, attach sheet 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 ----shaped, see "Swales" in this Part. If creating side banks, provide information below. ('· -c .E Will design replicate natural channel? Yes No If "no", for each instance Q) -----Ill 111 describe section shape & area, flow line slope (min. & max.), surfaces, and 100-year 0 -a. a. e .n design flow, and amount of freeboard: a. Instance 1: Ill Ill c Q) Q) >- E I Q) > Instance 2: e a. E o ·-z ]A Instance 3: () STORMWATER DESIGN GUIDELINES Effective February 2007 Page 16 of 26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage ConceQt and Design Parameters I Continued (Page 4.9) Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) How many facilities for subject property project? For each provide info. below. For each dry-type facilitiy: Facility 1 Facility 2 Acres served & design volume + 10% r~z. ~'B/°f7 /{g. 'b Z<:Ll::>7 100-yr volume: free flow & plugged !;1!1611:/? ~(q-fl 2.l!Pfo 1'57 "'2!11 ZC10 Design discharge (10 yr & 25 yr) 3'/fi.. (2. '//O. J'JJ ~-°IJ? l/Z2.Z€ Spillway crest at 100-yr WSE? -¥.-yes --no __.::£_yes --no Berms 6 inches above plugged WSE? _A_ yes --no A_yes __ no Explain any "no" answers: .,, Cll >- "' For each facility what is 25-yr design Q, and design of outlet structure? Facility 1: '1 /O · I~ --( V2.../t-Pe--zof'C>fh_ ~ 11;;,-e_ 0 Facility2: '{'2:2 .. "2..'C:. -Z-7 1Y:'-J' ~ Cot.v/0/2.,-r z I Do outlets and spillways discharge into a public facility in easement or ROW? Facility 1: __ Yes _x__ No Facility 2: Yes 'K_No --('-If "no" explain: "O ~N{) Cll ~ &..iv ~ g .,, 0 0. 0 ..... 0.. For each, what is velocity of 25-yr design discharge at outlet? & at spillway? (/) ~ Facility 1: & Facility 2: & '(3 Are energy dissipation measures used? _£No Yes Describe type and nl --LL. location: c: 0 ~ c: ~ Cll 0 Cll For each, is spillway surface treatment other than concrete? Yes or no, and describe: ..... <( Facility 1: 'le-7 Facility 2: '!fib For each, what measures are taken to prevent erosion or scour at receiving facility? Facility 1: Facility 2: If berms are used give heights, slopes and surface treatments of sides. Facility 1: '-I ,.... I ·~ -Ci:>: I ~57 I ~~/ G::r/2-A-~ Facility 2: (R. <E; - STORM\11/ATER DESIGN GUIDELINES Effective February 2007 Page 18 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage ConceRt and Design Parameters I Continued (Page 4.8) Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) Existing channels 'small creeks}: Are these used? --No --Yes If "ves" orovide the information below. Will small creeks and their floodplains remain undisturbed?_-_Yes No How many disturbance instances? Identify each planned location: For each location, describe length and general type of proposed improvement (including floodplain changes): For each location, describe section shape & area, flow line slope (min. & max.), surfaces, and 100-year design flow. ~ Cl) ::I c ~ Watercourses (and tributaries}: Aside from fringe changes, are Regulatory c 0 Watercourses proposed to be altered? __ No Yes Explain below. ~ -- Ul Submit full report describing proposed changes to Regulatory Watercourses. Address c: Cl) existing and proposed section size and shape, surfaces, alignment, flow line changes, E Cl) length affected, and capacity, and provide full documentation of analysis procedures > e and data. Is full report submitted? Yes --No If "no" explain: 0. E Q) c c nJ All Proposed Channel Work: For all proposed channel work, provide information .r:. () requested in next three boxes. If design is to replicate natural channel, identify location and length here, and describe design in Special Design section of this Part of Report. Will 100-year flow be contained with one foot of freeboard? --Yes --No If not, identify location and explain: Are ROW I easements sized to contain channel and required maintenance space? --Yes --No lfnot, identify location(s) and explain: STORMWATER DESIGN GUIDELINES Effective February 2007 Page 17 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised Februarv 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conce~t and Design Parameters . I Continued (Page 4.8) . Stonnwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) 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 many disturbance instances? Identify each planned location: For each location, describe length and general type of proposed improvement (including floodplain changes): For each location, describe section shape & area, flow line slope (min. & max.), surfaces, and 100-year design flow. 'O cu ::J c: ~ Watercourses (and tributaries}: Aside from fringe changes, are Regulatory 0 Watercourses proposed to be altered? __ No Yes Explain below. .£. --Ul Submit full report describing proposed changes to Regulatory Watercourses. Address 'E cu existing and proposed section size and shape, surfaces, alignment, flow line changes, E cu length affected, ahd capacity, and provide full documentation of analysis procedures > e and data. Is full report submitted? Yes No If "no" explain: a. --E "ii c: c: cu All Proposed Channel Work: For all proposed channel work, provide information .c (.) requested in next three boxes. If design is to replicate natural channel, identify location and length here, and describe design in Special Design section of this Part of Report. Will 100-year flow be contained with one foot of freeboard? --Yes --No If not, identify location and explain: Are ROW I easements sized to contain channel and required maintenance space? --Yes --No If not, identify location(s) and explain: STORMWATER DESIGN GUIDELINES Effective February 2007 Page 17 of 26 APPENDIX. D:TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICA~ DESIGN SUMMARY Part 4 -Drainage ConceRt and Design Parameters I Contin~ed (Page 4.8) Stonnwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) g!!ting scblonels 'small emu): Are these used? .--No --Yes If •ves• provide the information below. Will small creeks and their floodplains remain undisturbed? __ Yes. No How many disturbance instances? Identify each planned location: For each locaticm, describe length and general type of proposed improvement (including floodplain changes): For each location, describe section shape & area, flow line slope (min. & max.), surfaces, and 100-year design flow. -"i :J c +:J Watercourses <and tributaries): Aside from fringe changes, are Regulatory c 0 Watercourses proposed to be altered? __ No Yes Explain below . .£. --llJ -Submit full report describing proposed changes to Regulatory Watercourses. Address c G> existing and proposed section size and shape, surfaces, alignment, flow line changes, E ~ length affected, and capacity, and provide full documentation of analysis procedures e and data. Is full report submitted? Yes --No If •no• explain: a. ~ Qi c r:: '11 All Prooosed Channel Work: For all proposed channel work, provide information .c 0 requested in next three boxes. If design is to replicate natural channel, identify location and length here, and describe design in Special Design section of this Part of Report. Will 100-year flow be contained with one foot of freeboard? --Yes --No If not. identify location and explain: .. Are ROW I easements sized to contain channel and required maintenance space? --Yes __ No If not, identify location(s) and explain: STORMWATER DESIGN GUIDELINES Effective February 2007 Page 17 of26 APPENDIX. D: .TECH. DESIGN SUMMARY As Revised Februarv 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage ConceQt and Design Parameters I Continued (Page 4.9) Stonnwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) How many facilities for subject property project? For each provide info. below. For each dry-type facilitiy: Facility• 2J Facility.;c '-/ Acres served & design volume + 10% to ZC6tJ>~ 'Z..I 92."J c./ I 8 100-yr volume: free flow & plugged 205/'3'3 2.3(gl'78 ~ifl'O '35'113&; Design discharge (10 yr & 25 yr) ~(oO.oZ... l(Z'2.c~ .2?7'37.Cf? '17, ~ Spillway crest at 100-yr WSE? _Lyes --no ~yes --no Berms 6 inches above plugged WSE? _Lyes --no _2(_ yes __ no Explain any "no" answers: en ~ "' For each facility what is 25-yr design Q, and design of outlet structure? Facility 1: ~ '2.. 2 . o '6 -2..-9 1Kc../1 ~ C UJ-'\fr-:.Jfl.1 0 z Facility 2: "13'7. '79 ~ t f'2.A Pezo1 Alk WtP-¥L I Do outlets and spillways discharge into a public facility in ·easement or ROW? Facility-f:3 __ Yes _)(_No Facili~:'f __ Yes _)(_No ('--c If "no0 explain: -rte.is cF S.P. C.. Q) ?oND L{ 0J (/) 0 a. 0 ..... a.. For each, what is velocity of 25-yr design discharge at outlet? & at spillway? (/) ~ Facility 1: & Facility 2: & 13 Are energy dissipation measures used? 1-_No --Yes Describe type and IU u. location: c: .2 c .!! Q) 0 ~ For each, is spillway surface treatment other than concrete? Yes or no, and describe: <( Facility 4':~ '-/ P-.--7 FacilityW.'f '(~? For each, what measures are taken to prevent erosion or scour at receiving facility? Facility 1: Facility 2: If berms are used give heights. slopes and surface treatments of sides. Facility~ 7 -qi° I -{R'./ ~~ Facility~ 4 -}:-( 7 -/Q'. / Grr2As~ STORMVVATER DESIGN GUIDELINES Effective February 2007 Page 18 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX . APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage ConceQt and De5ign Parameter$ · I Continued (Page 4 .9) Storinwater Management Concept (continued). Within Or Serving Subject Property (Phase, or Site) (continued) How many facilities for subject property project? For each provide info. below. For each dry-type facilitiy: Facility•.2' Facility~ '--/ Acres served & design volume + 10% (0 2C6£3'~ 'Z..l 52."l l// 8 100-yr volume: free flow & plugged 205/'33 2'3(Ql't8 ~tf1e 95'113Co Design discharge (10 yr & 25 yr) ~(oo.o'Z-'IZ'2-c~ .2?7'37.Cf? '17'1 :t'7 Spillway crest at 100-yr WSE? _Lyes --no ·j_,..yes --no Berms 6 inches above plugged WSE? _2S_yes --no __2(_yes --no Explain any "no" answers: UI CV >- "' For each facility what is 25-yr design Q, and design of outlet structure? Facility1: ~22.o'e -2-91Kc./1 ~ CuJ-vf-.Jl(...j 0 z Facility 2: -Lf 3'7. '79 --r '41 Pez.o1 :At-k w;~ I Do outlets and spillways discharge into a public facility in easerrier:it or ROW? Facility-13 __ Yes _)(_No Facil~: 'f __ Yes .)L_ No <'--"'C If "no· explain: cF S.P.C.. CV 'PoNO .. '"l~s '2o U) l.J" 0 a. 0 ..... a. For each, what is velocity of 25-yr design discharge at outlet? & at spillway? U) ~ Facility 1: & Facility 2: & "(3 Are energy dissipation measures used? _:f:._No Yes Describe type and ro --LL. location: .. c: .2 c: ~ cu 0 CV For each, is spillway surface treatment other than concrete? Yes or no, and describe: ..... ~ Facility 4?:'7 'i P---7 FacilityW.'f 'frz...c;.. For each, what measures are taken to prevent erosion or scour at receiving facility? Facility 1: Facility 2: . If berms are used give heights, slopes and surface treatments of sides. Facility-1t 7 -t3° I -&~/ Grl2-A':::. s Facility~ 4 --;: -/ 7 -(&:,'. / Grl'2.As~ STORMWATER DESIGN GUIDELINES Effective February 2007 Page 18 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Continued (Page 4.10) SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.11) Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) Named Regulato~ 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 design(s). Is report provided? __ Yes --No If "no", explain: :;:;-Arterial or Major Collector Streets: Will culverts serve these types of roadways? Cl) Cl) No Yes How many instances? For each identify the .s::. tn ---- Cl) location and provide the information below. tn iii Instance 1: Cl) ..... >-~ I~ Instance 2: Instance 3: c: 0 oiil ZE Yes or No for the 1 OD-year design flow: 1 2 3 11i Headwater WSE 1 foot below lowest curb top? Spread of headwater within ROW or easement? <'--E Is velocity limited per conditions (Table C-11)? tn 111 C> tn c: -c Explain any "no" answer(s): ·-c: ~ 111 0 c: ..... 0 o:+J >-111 111 0 :: ..Q -c Cl) 111 ..c e ·c Minor Collector or Local Streets: Will culverts serve these types of streets? 0 0 No Yes How many instances? for each identify the ·-tn -----Cl) -g -c location and provide the information below: a. Cl) ..... a. Instance 1: 111 Z:;> -c >-Instance 2: Cl) c: tn 111 ::i._ Instance 3: tn 0 t::: tn Cl) Cl) For each instance enter value, or "yes" I "no" for: 1 2 3 ~u ::i c: 0 111 Design yr. headwater WSE 1 ft. below curb top? Q) ii) ..... c: <( ·-100-yr. max. depth at street crown 2 feet or less? ~ 0 Product of velocity (fps) & depth at crown (ft) = ? E ..... g Is velocity limited per conditions (fable C-11)? Limit of down stream analysis (feet)? Explain any "no" answers: STORM\IVATER DESIGN GUIDELINES Effective February 2007 Page 20 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 I SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.11) Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) Named RegulatOD£ 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 design(s). Is report provided? __ Yes --No If "no", explain: ~ Arterial or Major Collector Streets: Will culverts serve these types of roadways? Q) No Yes How many instances? For each identify the ..s:::. Ul ---- Q) location and provide the information below. Ul iii Instance 1: Q) L.. >-:g_ I~ Instance 2: Instance 3: c: .Q 0 iii Yes or No for the 100-year design flow: Z E 1 2 3 ~L.. Headwater WSE 1 foot below lowest curb top? .g -~ Spread of headwater within ROW or easement? E ('-co Is velocity limited per conditions (Table C-11)? Ul Ul g1-o Explain any "no· answer(s): ·-c: :;: co 0 c: .... 0 u:;::; >-co co 0 ~..Q -0 Q) co ..0 0--.... L.. Minor Collector or Local Streets: Will culverts serve these types of streets? 0 0 No Yes How many instances? for each identify the ·-Ul ---Q) ---g -0 location and provide the information below: c.. Q) -c.. Instance 1: co :;:;. -0 >-Instance 2: Q) c: Ul co ::J.,_ Instance 3: Ul 0 t Ul Q) Q) For each instance enter value, or "yes" I "no" for: ~ u 1 2 3 ::J c: 0 co Design yr. headwater WSE 1 ft. below curb top? Q) iii L.. c: <( ·-100-yr. max. depth at street crown 2 feet or less? ~ 0 Product of velocity (fps) & depth at crown (ft) = ? E L.. g Is velocity limited per conditions (Table C-11)? Limit of down stream analysis (feet)? . Explain any "no" answers: STORMWATER DESIGN GUIDELINES Effective February 2007 Page 20 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -JECHNICAL DESIGN SUMMARY Part 4 -Drainage Conceet and Design Parameters I Continued (Page 4.10) stonnwater Management Concept (continued) Within Or Serving Subject Property (Phase, or. Site) (continued) Do structures comply with B-CS S~cations? Yes or no, and explain if •no": Facility ,., ? -~~5 "' cu :e ='S frc,s u ., Facility 'I! '-( -C'O ::I u. c C:o:i oc +: 0 cu cu-For additional facilities provide all same infomiati.on on a separate sheet i) 0 Are parking areas to be used for detention? ,_.·_No __ Yes What is. maximum depth due to required design storm? Roadside Ditche!: Will culverts serve access driveways at roadside ditches? __ No --Yes If "yes". provide information in next two boxes. Will 25-yr. flow pass without flowing over drive~y 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 Explain any •no• answers: ('- "' C> c u; Are culverts parallel to public roadway alignment? _Yes __ No Explain: fl) e u llJ .s : C'O I > ·c . Creeks at Private Drives: Do private driveways, drives, or streets cross drainage Q. -ways that serve Above-Project areas or are in public easements/ ROW? C'O -0 0 No Yes If "yes· provide information below, cu z ----~~ How many instances? Describe location and provide information below: cu Location 1: 2: .. ::I CJ ~ Location 2: Location 3: For each location enter value for: 1 2 3 Design year passing without toping travelway? Watsr depth on travelway at 25-year flow? Water depth on travelway at 100-year flow? For more instances describe location and same information on separate sheet. R DESIGN GUIDELINES · Page 19 of26. SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conce~t and Design Parameters· j Continued (Page 4.11) Stonnwater Ma~agement Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) Named Regulato~ 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 design(s}. Is report provided? __ Yes --No If "no·. explain: c-Arterial or Major Collector Streets: Will culverts serve these types of roadways? Q) QJ No Yes How many instances? For each identify the .!: <II ---- QJ location and provide the information below. -<II ~ Instance 1: Q) (0 >-a. I~ Instance 2: Instance 3: c: 0 o:a; Yes or No for the 100-year design flow: 1 2 3 ZE ~~ Headwater WSE 1 foot below lowest curb top? Spread of headwater within ROW or easement? E <'-(0 Is velocity limited per conditions (Table C-11)? <II <II g>-o Explain any "no" answer(s}: ·-c: :z (0 0 c: .... 0 O; >-(0 (0 0 3= ..Q -0 QJ (0 .0 Minor Collector or Local Streets: Will culverts serve these types of streets? 2 ~.:: 0 0 No Yes How many instances? for each identify the ·-<II -----QJ -g "C location and provide the information below: a. QJ -a. Instance 1: tO ~ "C >-Instance 2: QJ c: UI t0 :J .... Instance 3: UI 0 t:: <II QJ Q) For each instance enter value, or "yes· I "no" for: 1 2 3 ..<'! 0 :J c: 0!1? Design yr. headwater WSE 1 ft. below curb top? Q) UI .... c: <( ·-100-yr. max. depth at street crown 2 feet or less? !!? 0 Product of velocity (fps} & depth at crown (ft} = ? E .... g Is velocity limited per conditions (Table C-11)? Limit of down stream analysis (feet}? Explain any "no" answers: STORMWATER DESIGN GUIDELINES Effective February 2007 Page 20 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Concel_:!t and Design Parameters j Continued (Page 4.11) Stonnwater Mar,iagement Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) . Named RegulatOO£ 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 design(s}. Is report provided? __ Yes --No If "no", explain: c-Arterial or Major Collector Streets: Will culverts serve these types of roadways? Q) Q) No Yes How' many instances? For each identify the .s:::. fl) ---- Q) location and provide the information below. fl) iii Instance 1: Q) L. >-~ I~ Instance 2: Instance 3: c .Q Yes or No for the 100-year design flow: oiii 1 2 3 ZE ?\I~ Headwater WSE 1 foot below lowest curb top? Spread of headwater within ROW or easement? E C'-cu Is velocity limited per conditions (Table C-11}? fl) fl) g>-o Explain any "no" answer(s}: ·-c ~ cu 0 c L. 0 O; >-cu cu () s: _Q -a Q) cu ..c 0--L. L. Minor Collector or Local Streets: Will culverts serve these types of streets? () () ·· No Yes · How many instances? for each identify the ·-fl) -Q) -----g -a location and provide the information beloW: 0. Q) ...... 0. Instance 1: cu~ -a >-Instance 2: Q) c fl) cu ::i_ Instance 3: fl) 0 -r UJ Q) Q) For each instance enter value, or "yes• I "no" for: ~() 1 2 3 ::i c () cu Design yr. headwater WSE 1 ft. below curb top? cu (ij L. c <{-100-yr. max. depth at street crown 2 feet or less? CV ._ 0 Product of velocity (fps} & depth at crown (ft} = ? E ._ g Is velocity limited per conditions (Table C-11)? Limit of down stream analysis (feet)? Explain any "no" answers: STORMWATER DESIGN GUIDELINES Effective February 2007 Page20 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Concept and Design Parameters I Continued (Page 4.12) Stonnwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) 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, 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: 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? __ No __ Yes If "yes· identify location(s), describe outfall design treatment(s): SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.13) Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) 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)? What drainage way(s) is to be crossed? en Q) Ol -0 ·.:: m 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 Yes No provided? ----If "no" explain: Is a Stormwater Provide a general description of planned techniques: ~ Pollution Prevention ~1~-r Pe:NCtN&r-(ii Plan (SW3P) ::J fl~ -l':?P~ a established for ...... pict construction? /)tv'nS Cl) f?a:_\L Fc. L -rrr£,£ ~ No~ Yes Special Designs -Non-Traditional Methods 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? _JS,_ No __ Yes If "yes" list general type and location below. 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? STORMWATER DESIGN GUIDELINES Effective February 2007 Yes ---- Page 22 of26 No If "no" explain: APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 ' . SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.13) Stormwater Management Concept (continued) Within Or Serving Subject Property (Phase, or Site) (continued) 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)? What drainage way(s) is to be crossed? ti) 41 OJ -0 ·;:: CD 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 provided? --Yes --No If "no" explain: Is a Stormwater Provide a general description of planned techniques: ~ Pollution Prevention ".:71 (..,-r PeAJC1/V&-Iii Plan (SW3P) :J f)~ -7P~ a established for .... ict construction? /){WlS Ql Pa-\£_ Fc I.. -rr=...<... ~ No ..:i.._ Yes Special Designs -Non-Traditional Methods 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? _lS._ No __ Yes If "yes" list general type and location below. 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? STORMWATER DESIGN GUIDELINES Effective February 2007 Yes ---- Page 22 of26 No If "no" explain: APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 . . SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conceet and Design Parameters I 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. ~ Dete11tion 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) 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) 2) 3) 4) 5) Design Parameters Hydrology No Is a map(s) showing all Design Drainage Areas provided? _x_ Yes --Briefly summarize the range of applications made of the Rational Formula: NM- What is the size and location of largest Design Drainage Area to which the Rational Formula has been applied? acres STORMWATER DESIGN GUIDELINES Effective February 2007 Location (or identifier): Page 23 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.15) Design Parameters (continued} Hydrology (continued) In making determinations for time of concentration, was segment analysis used? /00 No ._X_ Yes In approximately what percent of Design Drainage Areas? % As to intensity-duration-frequency and rain depth criteria for determining runoff flows, were any criteria other than those provided in these Guidelines used? __){_No __ Yes If "yes" identify type of data, source(s), and where applied: 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. Feature Analysis Year(s) Design Year Storm drain system for arterial and collector streets Storm drain system for local streets /00 /<::> Open channels Swale/buried conduit combination in lieu of channel Swales Roadside ditches and culverts serving them Detention facilities: spillway crest and its outfall /DO z_q Detention facilities: outlet and conveyance structure(s) /00 7 _...§' Detention facilities: volume when outlet plugged /00 '2-5 Culverts serving private drives or streets Culverts serving public roadways Bridges: provide in bridge report. Hydraulics What is the range of design flow velocities as outlined below? Design flow velocities; Gutters Conduit Culverts Swales Channels Highest (feet per second) Lowest (feet per second) Streets and Storm Drain Systems Provide the summary information outlined below: Roughness coefficients used: For conduit type(s) A!>7/ o ·OI 2. STORMWATER DESIGN GUIDELINES Effective February 2007 For street gutters: /2L.f /o•Of2' Coefficients: Page 24 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 . . SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Conce12t and Design Parameters I Continued (Page 4.15) Design Parameters (continued) Hydrology (continued) In making determinations for time of concentration, was segment analysis used? /00 No _x_ Yes In approximately what percent of Design Drainage Areas? % As to intensity-duration-frequency and rain depth criteria for determining runoff flows, were any criteria other than those provided in these Guidelines used? _){_No __ Yes If "yes· identify type of data, source(s), and where applied: 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. Feature Analysis Year(s) Design Year Storm drain system for arterial and collector streets Storm drain system for local streets /00 /(,;) Open channels Swale/buried conduit combination in lieu of channel Swales Roadside ditches and culverts serving them Detention facilities: spillway crest and its outfall /DO z_q Detention facilities: outlet and conveyance structure(s) /00 7~ Detention facilities: volume when outlet plugged /OD '2-5 Culverts serving private drives or streets Culverts serving public roadways Bridges: provide in bridge report. Hydraulics . What is the range of design flow velocities as outlined below? Design flow velocities; Gutters Conduit Culverts Swales Channels Highest (feet per second) Lowest (feet per second) Streets and Stonn Drain Systems Provide the summary information outlined below: Roughness coefficients used: For conduit type(s) frf>7/ o ·OI Z. STORMWATER DESIGN GUIDELINES Effective February 2007 For street gutters: /2Lf' /o•0(_2, Coefficients: Page 24 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 .. SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Concel!t and Design Parameters . j Continued (Page 4.16) Design Parameters (continued) Hydraulics (continued) Street and Stonn Drain Systems (continued) For the following, are assumptions other than allowable per Guidelines? · Inlet coefficients? :6_ No 71 Yes Head and friction losses _£No· --Yes Explain any "yes" answer. ' In conduit is velocity generally increased in the downstream direction? "'-· Yes --No Are elevation drops provided at inlets, manholes, and junction boxes? ..::b_ Yes --No Explain any "no" answers: 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: ~f\Jf:j Tw -Poor_ F-c...evfrrc~ oF c~e.eF-Sr"~OI NG;- Open Channels If a HEC analysis is utilized, does it follow Sec Vl.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: 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? Entrance, friction and exit losses: Bridges Provide all in bridge report STORMWATER DESIGN GUIDELINES Effective February 2007 Page25 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Concept and Design Parameters Continued (Page 4.17) Design Parameters (continued) Computer Software 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 version, any applicable patches and the publisher H«t Dt'Zc ca-0 -Ds. -t1e.Ntr ¢..) PoN"(}S w;,l\.)'l:rfo,f!.w? -~e.wi ~~ Part 5 -Plans and Specifications Requirements for submittal of construction drawings and specifications do not differ due to use of a Technical Design Summary Report. See Section Ill, Paragraph C3. Part 6 -Conclusions and Attestation Add any concluding information here: Licensed Professional Engineer State of Texas PE No. S'eS"G3 STORMWATER DESIGN GUIDELINES Effective February 2007 Conclusions Attestation Page 26 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 I '- SECTION IX APPENDIX D -TECHNICAL DESIGN SUMMARY Part 4 -Drainage Concept and Design Parameters Continued (Page 4.1 7} . Design Parameters (continued) Computer Software 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 version, any applicable patches and the publisher f/y£Jtec CR-O -f>B-t1e+rfr¢-l Pct-JaS w:.~Srto.e.w? -VU>e..wi ~~ Part 5 -Plans and Specifications Requirements for submittal of construction drawings and specifications do not differ due to use of a Technical Design Summary Report. See Section 111, Paragraph C3. Part 6 -Conclusions and Attestation Add any concluding information here: STORMWATER DESIGN GUIDELINES Effective February 2007 Conclusions Attestation Page 26 of26 APPENDIX. D: TECH. DESIGN SUMMARY As Revised February 2009 I '