HomeMy WebLinkAboutSection IXSECTION 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 Ill (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.
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
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
as detailed in Section Ill 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. 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.
2. Identification of the size and general nature of the proposed project, including any
proposed project phases. This paragraph should also include reference to
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 1 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
applications that are in process with either City: plat(s), site plans, zoning requests,
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 ET J 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.
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.
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 I retention facilities; buried
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
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
___ -page specifications document dated ____ comprise
the drainage report for this project."
Part 2-Project Administration I Start (Page 2.1)
Engineering and Design Professionals lnfonnation
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 2of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX ·
APPENDIX D -TECHNICAL DESIGN SUMMARY
applications that are in process with either City: plat(s), site plans, zoning requests,
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 ET J 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.
· 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.
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 I retention facilities; buried
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
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 principC!I
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
___ -page specifications document dated comprise
the drainage report for this project."
Part 2 -Project Administration I Start (Page 2.1)
Engineering and Design Professionals lnfonnation
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 2 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Jurisdiction
City: ~ryan
__ V_ C College Station
Engineering Firm Name and Address: Rn E Cc:NstALT1A16 Glow€~~
P.O. &x 9ZS3
CoLtc 5'ri mo/./ Date of Submittal:
Lead Engineer's Name and Contact lnfo.{phone, e-mail, fax): Other:
!N A. rr7 I f>.LF. P.£
Supportin~ Engineering I Consulting Firm(s): Other contacts:
( '17'1) (;l1D -o 3 'Z.9
raht>n@ ('r1Jefl ;(\cftK:Ci:)ftl
licant Information
~h~:,9J~~8~
@c~knttt;~.net
Property Owner{s) if not Developer I Applicant {&address): Phone and e-mail:
Project Identification
Is subject property a site project, a single-phase subdivision, or part of a multi-p ase subdivision?
mfAL11-Pt1M 6 If multi-phase, subject property is phase of __
Legal description of subject property (phase) or Project Area:
{see Section II, Paragraph B-3a) () .AA J. ..I 0 C~EE"K' meAtl>r.J~ -see~,,..c I A, r'AASB ~ .,, 71-''Tt>
CoJ.1s1>11N6 oF 15.ZS Ire,. 1DiAt-OF /.hto
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.
General Location of Project Area, or subject property (phase):
l«A'l"Eb e>erwCE,J Gi.et?J.I~ P~,.., 21€ ff. *-Gta;vs FJa,,, e1E f2J:,.
In City Limits? Extraterritorial Jurisdiction {acreage):
Bryan: ____ acres. Bryan: College Station: ___ _
College Station: I~ 2 5 acres. Acreage Outside ET J: ___ _
Part 2-Project Administration Continued (page 2.2)
Project Identification (continued}
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 3 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Roadways abutting or within Project Area or Abutting tracts, platted land, or built
subject property: developments:
S&:r .J.A, P,.J. 'Z S11t.L k)l\'fER mCl\t'ow l«€EK "1€NJf>IAJS C~Ee'-11fcAb<JW &.\Ii>. }/. f:.C>/P€R ~•bile ~\J8t... CRcf:J< b~. vJ. WaLSctJJ lJA~
Named Regulatory Watercourse(s) & Watershed(s): Tributary Basin(s):
lJ,<.1J.1""7fb ~r~. nF ft-k-~ Uza::K Pere-H C ~E:CI'.
Plat Information For Project or Subject Property (or Phase)
Preliminary Plat File #: Final Plat File #: Date:
Name: C.~ €€'{... f114l\-uJt;.. Status and Vol/Pg: lJJJbf:R.. ~ €.r1ew
If two plats, second name: File#:
Status: Date:
Zoning Information For Project or Subject Property (or Phase)
Zoning Type: ~.h ~r 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? N /A 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.
Part 2 -Project Administration I Continued (page 2.3)
Coordination For Project or Subject Property (or Phase)
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 4 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Roadways abutting or within Project Area or Abutting tracts, platted land, or built
subject property: developments:
Sa:r J.A, H{ '2 s11u,. k)/ll..'fER. m~w l ((€°EK "1€ N)o tA)S
cg_a;i1. YHcA~ &..vt> . .N. ~0{(>€R f1bl>E
&A\J8t C RC:f:k' b~. \'\). WELLBDiJJ ()A'l-5
Named Regulatory Watercourse(s) & Watershed(s): Tributary Basin(s):
lJAIJJM1tb ~r iS. oF ft:H.-fl Uze:El< Pasre-tf C~ECI'.
Plat Information For Project or Subject Property (or Phase)
Preliminary Plat File #: Final Plat File #: Date:
Name: [~ ce(... yt1~1~ Status and Vol/Pg: · LJ1-1~ffl.. (( E"•Il€w
If two plats, second name: File#:
Status: Date:
Zoning Information For Project or Subject Property (or Phase)
Zoning Type: ~t, ~r 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? N /A 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.
Part 2-Project Administration I Continued (page 2.3)
Coordination.For Project or Subject Property (or Phase}
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page4of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Note: For any Coordination of stormwater matters indicated below, attach documentation
describing and substantiating any agreements, understandings, contracts, or approvals.
Coordination Dept. Contact: Date: Subject:
With Other
Departments of
Jurisdiction
City (Bryan or
College Station)
Coordination With Summarize need(s) & actions taken (include contacts & dates):
Non-jurisdicti~
City Needed?
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 Neede~
Yes __ No __
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 objective in spaces below.
Entity Permitted or Status of Actions (include dates) Aooroved?
US Army Crops of
Engi~
No __ Yes -
US Environmental
Prote7v:gency
No __ Yes_
Texa~ission on
Environ ntal Quality
No __ Yes __
Braz~r Authori
No __ Yes -
Part 3 -Property Characteristics I Start (Page 3.1)
Nature and Scope of Proposed Work
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 5 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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 ~onstruction 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. JA P, 5 4 A f. 4g
Size of ~ m~ Sei:l1DIJ 1 ~es , co~15'5
PrO!;!Osed of 1?.Z.$ H.t.8 4:-kJ,u. Pt.A1 -4Ce> Lo75 ~ U1u. UwS112t.cc.T
Project tJ 2,foll L, F: o F 5ltzt$"1:5
Is any work planned on land that is not platted If yes, explain:
o?,nd for which platting is not pending?
__ No __ Yes
FEMA Floodplains /
Is any part of subject property abutting a Named Regulatory Watercourse I N y y
(Section II, Paragraph B 1) or a tributary thereof? / 0 --es --
Is any part of subject property in floodplain I No~ Yes Rate Map area of a FEMA-regulated watercourse? --
Encroachment(s) Encroachment purpose(s): __ Building site(s) __ Road crossing(s) into Floodplain
areas '9'1ed? __ Utility crossing(s) __ other (explain):
No __
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.
Part 3 -Property 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?
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 6 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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 ~onstruction 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. A P, 5 4 A f '48.
Size of ~ m~ Seci1~ I 1 ~6 , co!<B1s'5
Pro~osed ~F 1$.Z.$ N.t.8 ~ tV1Lt. Pu.-r "4CP Lo15 ~ U1u... {OIJSfacc..T
Project tJ 2)foll L. F: o F 5-Ji2ee:s
Is any work planned on land that is not platted If yes, explain:
o~nd for which platting is not pending?
__ No __ Yes
FEMA Floodplains /
Is any part of subject property abutting a Named Regulatory Watercourse I N V y
(Section II, Paragraph B 1) or a tributary thereof? / 0 --es --
Is any part of subject property in floodplain I No~ Yes Rate Map area of a FEMA-regulated watercourse? --
Encroachment(s) Encroachment purpose(s): __ Building site(s) __ Road crossing(s) into Floodplain
areas7ed? __ Utility crossing(s) __ Other (explain):
No __
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.
Part 3 -Property Characteristics j Continued (Page 3.2)
Hydrologic Attributes of Subject Property (or Phase)
Has an earlier hydrologic analysis been done for larger area including subject property?
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 6 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Y:)"'
Reference the study (&date) here, and attach cog if not already in City files. l:>0r11J~e RePat.\ P~eP~Eb y frnc 11J mfAl<tH 2007
Is the stormwater manrnt plan for the property in substantial conformance with the
earlier study? Yes No If not, explain how it differs.
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.
/
Do existing topographic features on subject property store or detain runoff? V No --Yes
Describe them (include approximate size, volume, outfall, model, etc).
/
Any ~nown drainage or tloo~ing problems in areas nefksubject property? __ No 1_ Yes
Identity: Tftc N.vJ. q C.,.,P@ 6fl.tb/S. A•flE T~-1$ ttJJbS!.~1~
17-1€ s.c. 2 · 3&s>,r c,.,P@ f_oypl!fl. f.b. iS uN~f1/..$1r_Eb
Based on location of study property in a watershed, is Type 1 Detention (flood control) needed?
(s?,ble B-1 in Appendix B)
__ Detention is required. --Need must be evaluated. __ Detention not required.
What decision has been reached? By whom?
If the need for
Type 1 Detention How was determination made?
must be evaluated:
Part 3 -Property Characteristics Continued (Page 3.3)
Hydrologic Attributes of Subject Property (or P e) (continued)
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 7 of26
Yes lfyes,
Lesser acrea e
APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
No
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
'
Above-Project Areas(Section II, Paragraph B3-a) /
Does Project Area (project or phase) receive runoff from upland areas? __ No £Yes
Size(s) of area(s) in acres: 1) '!. Z~ 2) 3) 4)
Flow Characteristics (each instance) (overland sheet, shallow concentrated, recognizable
concentrated section(s), small creek (non-regulatory), regulatory Watercourse or tributary);
~Lklt> .Sli€er ,-
h.au
Flow determination: Outline hydrologic methods and assumptions:
~11Q\JAL b/entob
Does storm ru~rain from public easements or ROW onto or across subject property?
__ No __ Yes If yes, describe facilities in easement or ROW:
2-Z.t{"C t1J p f,tJJ'bf:ll. bi~S f'RIAR1E-~ .. k?.
Are changes in runoff characteristics subject to change in future? Explain
'/13; ,.-Ju~ ~'1e.c/>tne,JI or 56:Vt>AI .1G
Conveyance Pathways (Section II, Paragra_ph C2)
Must runoff from study property ~cross lower properties before reaching a Regulatory
Watercourse or tributary? No Yes
Describe length and characteristics of each conveyance pathway(s). Include ownership of
property(ies).
Part 3 -Proeem 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
exist for any
__ instrument.
part of
STORMWATER DESIGN GUIDELINES
Effective February 2007
If instrument(s), describe their provisions.
Page 8 of26 APPENDIX.. D: TECH. DESIGN SUMMARY
As Revised February 2008
Ho
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Above-Project Areas(Section II, Paragraph 83-a) /
Does Project Area (project or phase) receive runoff from upland areas? __ No
Size(s) of area(s) in acres: 1) 1... ZS 2) 3) 4)
__L Yes
Flow Characteristics (each instance) (overland sheet, shallow concentrated, recognizable
concentrated section(s), small creek (non-regulatory). regulatory Watercourse or tributary);
~Lklt> 5M€er --fl.au
Flow determination: Outline hydrologic methods and assumptions:
'2.A-11Q\JAL fnentDb
Does storm ru~rain from public easements or ROW onto or across subject property?
__ No __ Yes If yes, describe facilities in easement or ROW:
2-24" c )1-J p f.tJJbER.. b(lfeNS PR1A<l1& fb .. k).
Are changes in runoff characteristics subject to change in future? Explain
'/es; ,...
l'llfU?£ ~'1€Lo/>1>1e,.JI Or $(3:VDAI .1G
Conveyance Pathways (Section II , Paragraph C2)
Must runoff from study property ~~ross lower properties before reaching a Regulatory
Watercourse or tributary? No Yes
Describe length and characteristics of each conveyance pathway(s). Include ownership of
property(ies).
Part 3 -Pro~ertv 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
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 8 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
pat~y(s)?
_V_ NNo
Pathway
Areas
Nearby
Yes
Where runoff must cross lower properties, describe characteristics of abutting lower
property(ies). (Existing watercourses? Easement or Consent aquired?)
Describe any built or improved drainage facilities existing near the property (culverts,
bridges, lined channels, buried conduit, swales, detention ponds, etc). ~x P1'Nt> 1t :1 &1t.r tf\/ %ril<>N .1.~ 8,~ '4 k:J>+1UJ
k> *' ~ bE"s.1~}[£3) ~ &t.11c. ..,-ID R~cEr \k. P~r... Ikc1EU>Prn&iT
~"'off ~ T1i£ 5'.1gs&1 b6JaoPtt'1£1t)T.
Drainage 1------,---------------------------------------1 Facilities Do any of these have hydr¢gic or hydraulic influence on proposed stormwater
design? __ No _V_ Y Yes If yes, explain:
Jlf'E. p~ .s~,..,~ewGR ~9;e:m .W"5 Des:r6/V@ /Al
CoA13lwc.10,J ~ rl11 JAIC..klPrfER. !J.11'LJA~,Jqfb ti..oTY' &1S7l~~~
f>&-G.t 1loA/ ~b>.
Part 4 -Drainage Concel;!t and Design Parameters I 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.
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 9 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
r;;TlA~~ D€-vec.oP /111?JJT" u;, u.. U71L1?:E P"s,uc... R. IJ. LcJ. 7lJ
COIVtJfiJ./ LJPLA>JO ~tlJ~uS Af..EAS ltle.C}it6H S712.66 fiau* ~6rftx.trJb S1bint $~ / mPfoc>fit16iTS
Discharge(s) To Lower Property(ies) (Section II, Paragraph E1)
Does project include drain~atures (existing or future) propose~ecome public via
platting? 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
conditio(~a;tio~;~:wi~:oyn~AA~). ~~~;t ~:;~ #
)
P05-1-\)~ltl"1~~~€ IS ~TAtJJS IN. i?wh If: 1.. °::0
p 0.£ ,. b6m.tR "161>'f" Cot\l bf T7 O.N$
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 prd design been coordinated with
owner(s) of receiving property(ies)? No Yes Explain and provide
documentation.
fat:,'flNc, Pllb~ At~ lJ111-J11J TH1~ £>€.JGt.'UPMCA!I.
Part 4 -Drainage ConceQt and Design Parameters I Continued (Page 4.2)
Stormwater Management Concept (continued)
Within Project Area Of Multi-Phase Project
Will project result Identify gaining Basins or Watersheds and acres shifting:
in shifting runoff
between Basins or
between
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 10 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
furtfC<6 j)e~o{) rrn3N\ vJ1u., lh7L1~ PlfSl/(.... ~. o. kJ. 7lJ
COrJ-Jfi?./ LJ P LA'-10 ~rJJA.u6 Af.EAS J~i}U6f/ ST(2.€6 fi.oo * lJAfbER_ (jfetlfJ b S1blbn S~ I m/?foc>6r16'Ts
Discharge(s) To Lower Property(ies) (Section II, Paragraph E1)
Does project include drain~atures (existing or future) propose~ecome public via
platting? __ 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
condition(~€;tioo::~:w~~:oyn~~~). ~~~:t~;~ #
).
Poor-t)~£t1"16(f[lsc~G" IS D6TA1JJ~ (~ ~blt1. ~
-Pa..c -b6.TU~rt7611f" Cot\)J:>t TTO.NS
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 prd design been coordinated with
owner(s) of receiving property(ies)? No Yes Explain and provide
documentation.
~€.lf:\'llNb p~~11E> Pt€ klrfH11J THI$ f>aGlr>P111€A!f.
Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.2)
Stormwater Management Concept (continued)
Within Project Area Of Multi-Phase Project
Will project result Identify gaining Basins or Watersheds and acres shifting:
in shifting runoff
between Basins or
between
STORMWATER DESIGN GUIDELINES .
Effective February 2007
Page 10 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D ~ TECHNICAL DESIGN SUMMARY
W7:eds? What design and mitigation is used to compensate for increased runoff
__ No from gaining basin or watershed?
Yes --
~
How will runoff from Project 1. ~ith facility(ies) involving other development projects.
Area be mitigated to pre-2. __ Establishing features to serve overall Project Area. development conditions?
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
Project Area): {Attached Exhibit# )
b~N' PQ.!h-..t, Su1cr 111 S€CfW ~~&Mc 2 -s ~E
~e. \G,l)JP\1-D2A\\)~f; ~bPiiCb f1'W2lfl zro7
2. For Overall Project Area {type & location of facilities): {Attached Exhibit# )
9ibtm 56<;& hJ~ S';1luclAR£ -SU ~AA6E
~T
3. By 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
project(s)?
('-·
"C
Q) UI c Q) Are other Best Management Practices for reducing stormwater pollutants proposed? fij >-a:: No Yes Summarize type of BMP and extent of use: UI ----c Cl .iii
Q) o ~
Iii
I
If design of any runoff-handling facilities deviate from provisions of B-CS Technical ·u Q) Specifications, check type facility(ies) and explain in later questions. a. (/) Detention elements Conduit elements Channel features ~ -- -- --
<{ Swales Ditches Inlets __ Valley gutters __ Outfalls ------
--Culvert features __ Bridges Other
Part 4 -Drainage Conce~t 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)? ~ _ Yes Identify type and
general size and In which phase(s).
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 11 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
If detention/retention serves (will serve) overall Project Area, describe how it relates to subject
~hase or site project (physical location, conveyance pathway(s}, construction sequence):
osr-D€~ ~wJoFF &Jiu T~\16t. ~lf6H fi?DfbsEt> ~""
sewei.,s. IA/ SGc,17()/J J."-, fHASB 3.,4A ~1B, IA/T() Gi>i7/\>b l>e;&.(ibl.1
R>Atbfti--St;E: ~ttuAt,€ STUDy fkePAflEb ~If 2aJ7
Within Or Serving Subject Property (Phase, or Site)
If property part of larger Pro~a, is design in substantial conformance with earlier analysis
and report for larger area? Yes No, then summarize the difference(s):
Identify whether each of the types of drainage features listed below are included, extent of use,
and general characteristics.
Typical shape? I Surfaces?
<'-· "O (I) rn Steepest side slopes: Usual front slopes: I Usual back slopes: rn ::J (I)
rn >-
(I)
I .i=. Flow line slopes: least Typical distance from travelway: B 'i5 typical greatest (Attached Exhibit # )
~ z
(I) I Are longitudinal culvert ends in compliance with B-CS Standard Specifications? ... Yes No, then explain: <(
rt At ~ctions or otherwise, do valley gutters cross arterial or collector streets?
>-No __ Yes If yes explain:
::J I :::: .... A~lley gutters proposed to cross any street away from an intersection? rn <I> -= __ No __ Yes Explain: (number of locations?) (I) ::J 0 ~ ClZ
Ui -g I ~ co
<(
Part 4 -Drainage Concept and Design Parameters . Continued (Page 4.4)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
Gutter line slopes: Least llD Usual ,{,() Greatest
Are inlets recessed on arterial and collector streets? __ Yes
identify where and why.
No If "no",
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 12 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
If detention/retention serves (will serve) overall Project Area, describe how it relates to subject
~hase or site project (physical location, conveyance pathway(s), construction sequence):
osr-De~ R11iJofF "-'1u T~l/6L ~lf6H fRDfbsGb 5Tl)Rff'1
:5£u)et,.S /JJ 5Gc.11DtJ J..A-1 fH/\SB 3,4.4 Ei'fB,1~ &>t11'\lb f>E7&.fi&.'
R>AJbft1--5~ ~L\>M€ S1UDy ~&Ml.Eb ~fl 2ro7
Within Or Serving Subject Property (Phase, or Site)
If property part of larger Pro~a, is design in substantial confonnance with earlier analysis
and report for larger area? Yes No, then summarize the difference(s):
Identify whether each of the types of drainage features listed below are included, extent of use,
and general characteristics.
Typical shape? · I Surfaces?
C'· -0 Q) Ul Steepest side slopes: I Usual front slopes: . I Usual back slopes: Ul ::J Q)
U) >-
Q)
I ..r:::. Flow line slopes: least Typical distance from travelway: ~
-0 typical (Attached Exhibit # )
t greatest
z
Q) I Are longitudinal culvert ends in compliance with 8-CS Standard Specifications?
.... Yes No, then explain: <{
rt At ~ctions or otherwise, do valley gutters cross arterial or collector streets?
>-No __ Yes If yes explain:
~ ::J I ~ .... A~lley gutters proposed to cross any street away from an intersection? U) Q) --::::: Q) ::J 0 __ No __ Yes Explain: (number of locations?) ~ C>Z iii -0
I Q) c ,_ m
<{
Part 4 -Drainage Concel;!t and Design Parameters I Continued (~age 4.4)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
~ iii Gutter line slopes: Least LlO. '10 Usual /./,O"'/i> Greatest l.Z'Z'lo
::J :t:: C'-Are inlets recessed on arterial and collector streets? Yes No If "no", 0 ::J "C ----5 Cl Q) identify where and why. "C U)
f//A -c ::J ::;: m
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 12 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Will inlets capture 10-year de~ormflow to prevent flooding of intersections (arterial
with arterial or collector)? __ Yes __ No If no, explain where and why not.
Will inlet size and placement prevent exceed~owable water spread for 10-year
design storm throughout site (or phase}? __ Yes __ No If no, explain.
/
Saa curves: Are inlets placed at low points? VYes No Are inlets and
co~ sized to prevent 100-year stormflow from ponding at greater than 24 inches?
__ Yes __ No Explain "no" answers.
Will 100-yr stormflow be contai~ combination of ROW and buried conduit on
whole length of all streets? __ Yes __ No If no, describe where and why.
Do~s 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? ~No --Yes Identify length(s) and where
used.
<'-· -0 Pipe runs between system I Typical "'l3l>' ./ Longest Z. 7.D ' ~fl) ~ access points (feet):
Are junction boxes used at each bend? VYes --No If not, explain where
and why. fl)
c ·-0 ~z -0 I E .... 0 Are do~am soffits at or below upstream soffits? Least amount that hydraulic iii
.!!!. Yes __ No __ If not, explain where and why: grade line is below gutter line
(system-wide):
J.'17 I
Part 4 - Drainage Conceet and Design Parameters I Continued (Page 4.5)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
Q) Q) Describe watercourse(s), or system(s) receiving system discharge(s) below
Jiij :Q . ~ (include design discharge velocity, and angle between converging flow lines). u .... > J 111 0. c. .... Jg 1) Watercourse (or system), velocity, and angle? g Q) c.. fl) ..... ::i ~ c ~ 0 i--0.C -fl)
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 13 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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?
1)
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):
C'"· I/) -Q) ~I/)
-Q) Flow line slopes (minimum and maximum): I/)>-c: ~ I
t1 Outfall characteristics for each (velocity, convergent angle, & end treatment).
I/)
Q) .... Will 100-year design storm runoff be contained within easement(s) or platted drainage <(
ROW in all instances? --Yes --No If "no" explain:
Part 4 -Drainage ConceQt and Design Parameters I Continued (Page 4.6)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phasey>r Site) (continued)
rQ I/) Are roadside ditches used? V No __ Yes If so, provide the following:
I/) Q) Is 25-year flow contained with 6 inches of free board throughout ? __ Yes --No lg Q) i3 Are top of banks separated from road shoulders 2 feet or more? __ Yes No 0 ~ --~ 0 Are all ditch sections trapezoidal and at least 1.5 feet deep? Yes No ----
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 14 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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?
1)
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):
C"· Ul a:;
~ Ul ..... Q) Flow line slopes (minimum and maximum): Ul >-c ~ I
t1 Ul
Outfall characteristics for each (velocity, convergent angle, & end treatment).
Q) .... Will 100-year design storm runoff be contained within easement(s) or platted drainage <(
ROW in all instances? --Yes --No If "no" explain:
Part 4 -Drainage ConceRt and Design Parameters I Continued (Page 4.6)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phasey>t" Site) (continued)
lg Ul
Are roadside ditches used? V No __ Yes If so, provide the following:
Ul Q) Is 25-year flow contained with 6 inches of freeboard throughout ? __ Yes --No ~ Q) -5 Are top of banks separated from road shoulders 2 feet or more? __ Yes No 0 =:: --~ 0 Are all ditch sections trapezoidal and at least 1.5 feet deep? Yes No ----
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 14 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
For any "no" answers provide location(s) and explain:
If conduit is beneath a swale, provide the following information (each instance).
Instance 1 Describe general location, approximate length:
Ul Q) >-
I~ Is 100-year design flow contained in conduiUswale combination? --Yes --No
If "no" explain:
c:
' 0 RJ z iii Space for 100-year storm flow? ROW Easement Width ~1~ Swale Surface type, minimum Conduit Type and size, minimum and maximum
0 and maximum slopes: slopes, design storm:
:;:::
C'-· '5 Ul "C Q) RJ c >-Inlets Describe how conduit is loaded (from streets/storm drains, inlets by type): c m c
..c. m u ....
c: s
Q) c
Q. 0 0 ·-Access Describe how maintenance access is provided (to swale, into conduit): .... -m 0 E :::I ....
-~ s c c Q)
"C E Instance 2 Describe general location, approximate length: Q) RJ Ul Ul :::I
Ul Q)
c "C
0 ·:;;; Is 100-year design flow contained in conduiUswale combination? Yes No :;:: 0 -- --RJ .... If "no" explain: c Q.
:0 Qi E Q)
0 ..c. Space for 100-year storm flow? ROW Easement Width u Ul .... Q) Swale Surface type, minimum Conduit Type and size, minimum and maximum :::I iii "C .... and maximum slopes: slopes, design storm: c RJ
0 Q. u Q) -. Ul Q) Inlets Describe how conduit is loaded (from streets/storm drains, inlets by type): ~ c -8.
Ul
Q) .... <( Access Describe how maintenance access is provided (to swale, into conduit):
Part 4 -Drainage Conce1:2t and Design Parameters I Continued (Page 4.7)
Stonnwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
"C If "yes" provide the following information for each instance: Ul Q)
.!!! "§ ;!; Instance 1 Describe general location, approximate length, surfacing: RJ ..c "i ~ .... I Ul :::I
-0 ' =..c.' ~'§
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 15 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Is 100-year design flow contained in swale? Yes --No Is swale wholly
within drainage ROW? --Yes --No Explain "no" answers:
Access Describe how maintenance access is provide:
Instance 2 Describe general location, approximate length, surfacing:
Is 100-year design flow contained in swale? --Yes --No Is swale wholly
within drainage ROW? __ Yes --No Explain "no" answers:
Access Describe how maintenance access is provided:
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.
"O .!: (I) Will design replicate natural channel? Yes No If "no", for each instance U) Ill 0 ------a. a. describe section shape & area, flow line slope (min. & max.), surfaces, and 100-year 0 x .... w design flow, and amount of freeboard: a.
U) f/) Instance 1: -(I) c: >-(I)
E I (I) > 0 Instance 2: .... a.
}:1 Instance 3:
(.)
Part 4 -Drainage Conce~t and Design Parameters j 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
f/) If "yes" provide the information below. "E ~
-(I) ~ E Will small creeks and their floodplains remain undisturbed? __ Yes No How
lij ~. .c 0 many disturbance instances? Identify each planned location:
(.) c..
£'
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 16 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Is 100-year design flow contained in swale? --Yes --No Is swale wholly
within drainage ROW? --Yes --No Explain "no" answers:
Access Describe how maintenance access is provide:
Instance 2 Describe general location, approximate length, surfacing:
Is 100-year design flow contained in swale? --Yes --No Is swale wholly
within drainage ROW? __ Yes --No Explain "no" answers:
Access Describe how maintenance access is provided:
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 c: Q) Will design replicate natural channel? Yes No If "no", for each instance I/) 111 0 ------a. a. describe section shape & area, flow line slope (min. & max.), surfaces, and 100-year 0 x .... w design flow, and amount of freeboard: a.
I/) I/) Instance 1: c Q)
Q) >-
E
I Q) > 0 Instance 2: .... a.
}:1 Instance 3:
(.)
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 I/)
c:~ If "yes" provide the information below.
Qj Q) I
c: E Will small creeks and their floodplains remain undisturbed? __ Yes No How
C: Q) I many disturbance instances? Identify each planned location: 111 > . .s::. 0 u c.. E,
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 16 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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.
Watercourses (and tributaries): Aside f~nge changes, are Regulatory
Watercourses proposed to be altered? __ No __ Yes Explain below.
Submit full report describing proposed changes to Regulatory Watercourses. Address
existing and proposed section size and shape, surfa~ignment, flow line changes,
length affected, and capacity, and provide full docume ·on of analysis procedures
and data. Is full report submitted? Yes __ No If "no" explain:
/\//A
All Proposed Channel Work: For all proposed channel work, provide information
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:
Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.9)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued) -I.Jo
How many facilities for subject property project? For each provide info. below.
c: For each dry-type facilitiy: Facility 1 Facility 2 0
; fl) c: Q) Acres served & design volume + 10% Q) :;:; ( Qi~ 100-yr volume: free flow & plugged a co ,
G> LL .... Design discharge (10 yr & 25 yr) <(
c Spillway crest at 100-yr WSE? __ yes no __ yes no ----
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 17 of26 APPENDIX. D: TECH . DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Berms 6 inches above plugged WSE? 1--yes --no , __ yes no
Explain any "no• answers:
For each facility what is 25-yr design Q , and design of outlet structure?
Facility 1:
Facility 2:
Do outlets and spillways discharge into a public facility in easement or ROW?
Facility 1: __ Yes --No Facility 2: --Yes --No
If "no· explain:
For each, what is velocity of 25-yr design discharge at outlet? & at spillway?
Facility 1: & Facility 2: &
Are energy dissipation measures used? --No --Yes Describe type and
location:
For each, is spillway surface treatment other than concrete? Yes or no, and describe:
Facility 1:
Facility 2:
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:
Facility 2:
Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.10)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued) -.Alo
Do structures comply with 8-CS Specifications? Yes or no, and explain if "no":
I/) ~ Facility 1; ==s 0 cu <ti :J LL c c:;:::; Facility 2: 0 c :;:::; 0 c 0 cu -Ci)
0
For additional facilities provide all same information on a separate sheet.
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 18 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Berms 6 inches above plugged WSE? J __ yes --no J __ yes --no
Explain any "no· answers:
For each facility what is 25-yr design Q, and design of outlet structure?
Facility 1:
Facility 2:
Do outlets and spillways discharge into a public facility in easement or ROW?
Facility 1: __ Yes --No Facility 2: --Yes --No
If "no" explain:
For each, what is velocity of 25-yr design discharge at outlet? & at spillway?
Facility 1: & Facility 2: &
Are energy dissipation measures used? --No --Yes Describe type and
location:
For each, is spillway surface treatment other than concrete? Yes or no, and describe:
Facility 1:
Facility 2:
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:
Facility 2:
Part 4 -Drainage Conce~t and Design Parameters j Continued (Page 4.1 O)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued) -.Afo
Do structures comply with 8-CS Specifications? Yes or no, and explain if "no":
I/) '1l Facility 1; :;:::; =:c u '1l <11 ::I LL c
c += Facility 2: 0 c +: 0 cu aJ-
Q)
0 For additional facilities provide all same information on a separate sheet.
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 18 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Are parking areas to be used for detention? __ No --Yes What is
maximum depth due to required design storm?
Roadside Ditches: 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 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
Explain any "no" answers:
<'-· (/)
C> c "iii Are culverts parallel to public roadway alignment? __ Yes No Explain: (/)
0 --.... (/) 0 Q)
_gi >-ro I > ·;:: Creeks at Private Drives: Do private driveways, drives, or streets cross drainage 0.
iii ways that serve Above-Project areas or are in public easements/ ROW?
}:1 --No --Yes If "yes" provide information below.
How many instances? Describe location and provide information below.
Q) Location 1: > "5 0
Q) Location 2: .... <(
Location 3:
For each location enter value for: 1 2 3
Design year passing without toping travelway?
Water 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.
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)
0 Named Reaulat~ Watercourses I& Tributaries\: Are culverts proposed on these
(/)= facilities? _L No __ Yes, then provide full report documenting assumptions, t .O Q) ::J criteria, analysis, computer programs, and study findings that support proposed > 0. "5 ..... design(s). Is report provided? __ Yes No If "no", explain: o ro --Q) "U .... Q) <( (/) ::J
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 19 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Arteriar'Or Maior Collector Streets: Will culverts serve these types of roadways? ~No Yes How many instances? For each identify the
location and provide the information below.
Instance 1:
Instance 2:
Instance 3:
Yes or No for the 100-year design flow: 1 2 3
Headwater WSE 1 foot below lowest curb top?
Spread of headwater within ROW or easement?
Is velocity limited per conditions (Table C-11 )?
Explain any "no" answer(s):
Mino~ollector or Local Streets: Will culverts serve these types of streets?
_lL_No Yes How many instances? for each identify the
location and provide the information below:
Instance 1:
Instance 2:
Instance 3:
For each instance enter value, or "yes• I "no" for: 1 2 3
Design yr. headwater WSE 1 ft. below curb top?
100-yr. max. depth at street crown 2 feet or less?
Product of velocity (fps) & depth at crown (ft) = ?
Is velocity limited per conditions (Table C-11)?
Limit of down stream analysis (feet)?
Explain any "no" answers:
Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4 .12)
Stormwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued) -NO
All Proposed Culverts: For all proposed culvert facilities (except driveway/roadside
Ul 'C ditch intersects) provide information requested in next eight boxes.
t C1I Do culverts and travelways intersect at 90 degrees? Yes No If not,
C1I 2 ----
~ .. identify location(s) and intersect angle(s), and justify the design(s):
:::Jc () 0 .£.
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 20 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
Arterial'or Maior Collector Streets: Will culverts serve these types of roadways?
~ No Yes How many instances? For each identify the
location and provide the information below.
Instance 1:
Instance 2:
Instance 3:
Yes or No for the 100-year design flow: 1 2 3
Headwater WSE 1 foot below lowest curb top?
Spread of headwater within ROW or easement?
Is velocity limited per conditions (Table C-11)?
Explain any "no· answer(s):
Mino~ollector or Local Streets: Will culverts serve these types of streets?
_\L_No Yes How many instances? for each identify the
location and provide the information below:
Instance 1:
Instance 2:
Instance 3:
For each instance enter value, or "yes· I "no" for: 1 2 3
Design yr. headwater WSE 1 ft. below curb top?
100-yr. max. depth at street crown 2 feet or less?
Product of velocity (fps) & depth at crown (ft) = ?
Is velocity limited per conditions (Table C-11)?
Limit of down stream analysis (feet)?
Explain any "no" answers:
Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.12)
Stonnwater Management Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued) -NO
All Proposed Culverts: For all proposed culvert facilities (except driveway/roadside
UI 'C ditch intersects) provide information requested in next eight boxes.
t Q) Do culverts and travelways intersect at 90 degrees? Yes No If not,
Q) ~ ----
.2 :;:; identify location(s) and intersect angle(s), and justify the design(s):
::J c: uo ~
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 20 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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):
Is scour/erosion protection provided to ensure long term stability of culvert structural
components, and surfacing at culvert ends? __ Yes __ No If "no" Identify
locations and provide justification(s):
~ Will 100-yr flow and spread of backwater be fully contained in street ROW, and/or
'::2: drainage easements/ ROW? __ Yes --No if not, why not?
Do appreciable hydraulic effects of any culvert extend downstream or upstream to
neighboring land(s) not encompassed in subject property? --No --Yes If
"yes" describe location(s) and mitigation measures:
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.
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? _ll._ No --Yes
If "yes" provide the following information.
Name(s) and functional classification of the roadway(s)?
Ii)
di O> "O ~
What drainage way(s) is to be crossed?
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 21 of 26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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 -~(?66> ~fH. S.,Nt>et> fy HLTS?.. 1P&1c::.. iii Plan (SW3P) ::I 0 established for -0$ E" o F C~c11t)J G..rr'WICE .... project cons~n? Cl)
-p,'\~e-'2. ~ __ No __ Yes IJ<Jter PRr>'l'&:'ibJ
Special Designs-Non-Traditional Methods
A~ non-traditional methods (aquatic echosystems, wetland-type detention, natural stream
repr ion, BMPs for water quality, etc.) proposed for any aspect of subject property project?
__ 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 tha~water management objectives will not
be compromised, and that maintenance cost will n exceed those of traditional design
solution(s). Is report provided? __ Yes __ No If "no" explain:
JJ/A
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 -No>J€.
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
STORMWATER DESIGN GUIDELINES
Effective February 2007
I Justification for Deviation (attach additional sheets if nE;!eded)
Page 22 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D ;_ TECHNICAL DESIGN SUMMARY
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 -~{?GB> ~~ 8.:t1V£)et> e:y HLTEfl. ~JG iii Plan (SW3P) ::::J 0 established for -LJS. e 0 F C~c."m).J G.trRANc E ... project cons~n? Q)
p,"\11;5€ z iii l>JlET f,q,16:1bJ s __ No __ Yes -
Special Designs -Non-Traditional Methods
Are any non-traditional methods (aquatic echosystems, wetland-type detention, natural stream
r~ion, BMPs for water quality, etc.) proposed for any aspect of subject property project?
__ 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 tha~water management objectives will not
be compromised, and that maintenance cost will n exceed those ·of traditional design
solution(s). Is report provided? __ Yes __ No If "no" explain:
"'/A
Part 4 -Drainage Conce(!t and Design Parameters I Continued (Page 4.14)
Sformwatef Manage~ent Concept (continued)
Within Or Serving Subject Property (Phase, or Site) (continued)
Special Designs -Deviation From B-CS Technical Specifications -NoJJe-
If any design(s) or material(s) of traditional runoff-handling facilities deviate from provisions of
8-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
STORMWATER OESIGN GUIDELINES
Effective February 2007
I Justification for Deviation (attach additional sheets if needed)
Page 22 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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 /
Is a map(s) showing all Design Drainage Areas provided? V Yes --No
Briefly summarize the range of applications made of the Rational Formula:
Sil>lwt ~11J ~A.l.'fS.15
What is the size and location of largest Design Drainage Area to which the Rational Formula
has been applied? 3.03 acres Location (or identifier): '' ~"37"
Part 4 -Drainage Conce(!t and Design Parameters I Continued (Page 4.15)
Design Parameters (continued)
Hydrology (continued)
In making det~ations for time of concentration, was segment analysis used?
No Yes In approximately what percent of Design Drainage Areas? JDO %
As to intensity-duration-frequency and ra in depth criteria for de~ing 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:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 23 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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 Jf)O ve< ID vr<.
Open channels ,
Swale/buried conduit combination in lieu of channel
Swales
Roadside ditches and culverts serving them
Detention facilities: spillway crest and its outfall
Detention facilities: outlet and conveyance structure(s)
Detention facilities: volume when outlet plugged
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? 1ove..
Design flow velocities; Gutters Conduit Culverts' Swales Channels
Highest (feet per second) 4.ez I0-71P / / /
Lowest (feet per second) 7.7.:Z, 4. 7'1 / v I/
Streets and Storm Drain Systems Provide the summary information outlined below:
Roughness coefficients used: For street gutters: f'J.O /ij
For conduit type(s) Abs £l.P Coefficients: (). 01 'Z. D.01::5
Part 4 -Drainage Conce~t and Design Parameters I Continued (Page 4.16)
Design Parameters (continued)
Hydraulics (continued)
Street and Storm Drain Systems (continued)
Yes
For the following, arl2jmptions other than allowable per Guidelines~
Inlet coefficients? No __ Yes Head and friction losses __ No --Explain any "yes" answer:
/
In conduit is velocity generally increased in the downstream direction? 1/ No ~es --Are elevation drops provided at inlets, manholes, and junction boxes? __ Yes --No
Explain any "no" answers:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 24 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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 I ()0 VC<. ID \J~
Open channels
,
Swale/buried conduit combination in lieu of channel
Swales
Roadside ditches and culverts serving them
Detention facilities: spillway crest and its outfall
Detention facilities: outlet and conveyance structure(s)
Detention facilities: volume when outlet plugged
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? 1ove.
Design flow velocities; Gutters Conduit Culverts' Swales Channels
Highest {feet per second) 4.SZ ID-71P / ~ /
Lowest (feet per second) 7.7..Z. 4.1'1 / / I/
Streets and Storm Drain Systems Provide the summary information outlined below:
Roughness coefficients used: For street gutters: f).0 I i1
For conduit type(s) ~s ~p Coefficients: (). 01 'Z. D.01:5
Part 4 -Drainage Conce~t and Design Parameters j Continued (Page 4.16)
Design Parameters (continued)
Hydraulics (continued)
Street and Storm Drain Systems (continued)
Yes
For the following, arl2jmptions other than allowable per Guidelines~
Inlet coefficients? No __ Yes Head and friction losses __ No --Explain any "yes" answer:
/
In conduit is velocity generally increased in the downstream direction? 1/ No ~es --Are elevation drops provided at inlets, manholes, and junction boxes? __ Yes --No
Explain any "no" answers:
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 24 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
./
Are hydraulic grade lines calculat~ shown for design storm? V 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:
$eE TA1tk..>~ Co~S1f)~ Ct>.NrA1>.1Eb 1/J >ui;SEcT
~ttW,bC-(<~
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
Part 4 -Drainage Conceet and Design Parameters I 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
:
W1Ns°ibf,n -~arn ~'"'~E.
Part 5 -Plans and Seecifications
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 25 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
SECTION IX
APPENDIX D -TECHNICAL DESIGN SUMMARY
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. ~~ SfJ~
STORMWATER DESIGN GUIDELINES
Effective February 2007
Conclusions
Attestation
Page 26 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
" ··,
:.t" ---~.
'·~j
SECTION IX ·
APPENDIX D -TECHNICAL DESIGN SUMMARY
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
Conclusions·
Add any concluding information here:
Attestation
Provide attestation to the accuracy and completeness of the foregoing 6 Parts of this Technical
Desi n Summa Draina e Re art b si nin and sealin below.
Licensed Professional Engineer
State of Texas PE No._t3~8_5~B~~--
STORMWATER DESIGN GUIDELINES
Effective February 2007
Page 26 of26 APPENDIX. D: TECH. DESIGN SUMMARY
As Revised February 2008
. '
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