HomeMy WebLinkAboutFolder37:09 From: Bridgette George 979-754-3895
....
((~ DATE SUBMITTED:
C::OlllGl H<>TION
DEVELOPMENT PERMIT
MINIMUM SUBMITTAL REQUIREMENTS
i $100.00 Development Permit Application Fee.
X. Drainage and erosion control plan, with supporting Drainage Report two (2) copies each.
~ Notice of Intent (N.0.1.) if disturbed area is greater than 5 acres.
LEGAL
DEscRIPTroN LD1' l~-A 1 ?~uwJ.r'( VL..A1:A
APPLICANT (Primary Contact for the Project):
Name
?~Bt>l\/CSIO~ ( ~~A:SE. St)(
d 3)J-1 ~((_> ,Ave_ .S
--State (~¥-A~ Zip Code ilo"Z..4-
Phone Number 1 \ \ .. 4 c.S • 0 0 0 I
PROPERTY OWNER'S INFORMATION:
Name
City
E-Mail Address .,; "91Ji :'~S-fi 4 ' >
d~: e r~.a~rt.c::cJ +j · e~
Fax Number ft 3 • 4<.S • ] SSC..
Street Address 'loo ~-.) f CtuJ~ L~ _,.. t I C City
State ~~S Zip Code 110 1-V E-Mail Address d \or~b~ ~ reA..I~ re.4.l-1-7 . c~
Phone Number 1•) • 4'1ci>S"" 00 0 l Fax Number ,,\ ... '/~S ... 'S!5"(.
ft~CIIITECT OR ENGINEER'S INFORMATION:
Name
Street Address 'loo 10wA) I {!pl) 111t7 (...~
State 1£-~ Zip Code 11 t:> t '-/
Phone Number 1 • l ..,. ~ f. $""" 'l>Pt:> I
DEVELOPME T PERMIT
DPERMIT.DOC 4/18101
.A, -Z. I o City J.(;I) ~-u ~
E-Mail Address d6; t. feJ.,,.,te4.1-; • ('d)L{
1 of2
. 07: 09 From: Bridgette George 979-764-3896 t' age t. at j
Application is hereby made for the following development specific site/waterway alterations:
r €)l\~T·~~
ACKNOWLEDGMENTS:
L 61ivQ.J kl , t,~ l-,4>.S , design enginexr!owner, hereby acknowledge or affirm that:
The information and conclusions contained in the above plans and supporting documents comply with the current
requirements of the City of College Station, Texas City Code, Chapter 13 and its associated Drainage Policy and Design
Standards.
As a condition of approval of this permit application, I agree to construct the improvements proposed in this application
according to these documents and the requirements of Chapter 13 of the College Station City Code.
Property Owner( s) Contractor
CERTIFICATIONS: (for proposed alterations within designated flood hazard areas.)
A I, ~1'4VE.tJ ~. 6t'il<=a4S , certify that any nonresidential structure on or proposed to be on this site as
part of this application is designated to prevent damage to the structure or its contents as a result of flooding from the
100 year storm.
~~ Date I I
B. I, 51'5V~ ~ • 6tl(>4J , certify that the finished floor elevation of the lowest floor, including any
basement, of any residential structure, proposed as part of this application is at or above the base flood elevation
established in the latest Federal Insurance Administration Flood Hazard Study and maps, as amended.
£.?dAlti--v$ Date
C. I, ()1€)./~ /N, C2tJ445 , certify that the alterations or development covered by this permit shall not
diminish the flood-carrying capacity of the waterway adjoining or crossing this permitted site and that such alterations or
development are consistent with requirements of the City of College Station City Code, Chapter 13 concerning
encroachments offlo dways and offloodway fringes.
Date
D. I, ~\/~;J 4), 6,/21~,{;$ , do certify that the proposed alterations do not raise the level of the 100
year flood above elevation established in the latest Federal Insurance Administration Flood Hazard Study. ~~dY Date /Jf7 ~ Z,,eo/
2 of2
DPERMIT.DOC 4118101
04/18/01 07:09 From: Bridgette George 979-764-3896 t' age j or j ...
Conditions or comments as part of approval:
In accordance with Chapter 13 of the Code of Ordinances of the City of College Station, measures shall be taken to
insure that debris from construction, erosion, and sedimentation shall not be deposited in city streets, or existing drainage
facilities.
All development shall be in accordance with the plans and specifications submitted to and approved by the City
Engineer for the above named project. All of the applicable codes and ordinances of the City of College Station shall
apply.
DEVELOPMENTPERlvlIT
DPERMIT.DOC 4/18101
3 of 2
UJ /~~/Ul 14:Jl "O .. d l ~ /04 J4110
FOR OFFICE USE ONLY
CASE N /-00 i?
DA TE SUBMITTED
p P-ltJJO.-u/\S. 0 1-_(X) I~~
SITE PLAN APPLICATION-"~
Ml.NlMUM SU.Si\'llTTAL REQUIREMENTS
V' Site plan application completed in full.
~ $100.00 Application Fee. 1 $100.00 Development PcrmiL Application Fee. .
_ $300.00 Public Infrastructure lnspc:ction Fee if applicabl1.:. (This fee is payable if construcLiun of a public
. / waterline, scwerline. sidewalk. street or drainage facilities is involved.)
V Ten (10) folded copies of site plan. . J A copy of the atl;icht:d sil.e plan cht:cklisc with all items checked off or a brief explanation a.c; to why they are nor
checked off.
APPLICATION DATA
NAME OF PROJECT WAtJ~~ s •~·vi ..
ADDRESS -re:~~ Ave"1u€:
LEGAL DESCR!PTTON lPTS , . .,.., V,, 4-PoG-11~ Cf ~fl) PA~~'(
APPLICANT (Prima1y Contact for the Project):
Name '5-r~-...te:~ l'.:,L lC~S 1 f>. E..
Street Address C\m -r~ ft QO())t1 -~~~.t.~ ... CitY ~ OSToA.)
Seate ft Zip Code i.IJ>V/= E-Mail Address d6L. e. ce.d2.at~te.'2+1. C.~
Phone Number ---·· (12w? ... 4<,S"-ooo l fax Number :1 l';> • 4-~-~--:.~.~S:_Cp~-----
PROPERTY OWNER'S INFORMATION:
Name Te-Ms· Tbtt.~.s'rwooo 8e"T41L , L. f.
Street Address 'f e;o 1"~ +' ~0()"1'12-l W ¢ti O City !krz: ..S ru ,j
State Tu Zip Code i10 z..(f E-Mail Address Cf?l. @.. f ~M re4..\ 1-; · ~
Phone Number J13 .. 'f',5-ooo1 Fa., Number 1'~ · tf""->-~SS~
A<RCI IfFECT Oft ENGlNEER•s INFORMATION:
Name '51'"E.....,t ~ ~. Gir2..lt:-i~.S 1 r. E..
Street Adtlress 9d'O °'(o,..>A) c(:. ~.Z>L)~, l,~ '-~ City ~.)~~,U
State T~ Zip Code 7 7'0 7..'/ E-Mail Address d6,· e tt.d#t t-<7 . ~
Phone Number i' ~ .. tfhS"~ ~00 l Fa.'\; Number '11 l ... · lf~S' -3S S (..
011-IER CONTACTS (.Please specify type of contact, i.~. project manager, polentia.l buyer, local contact, t:tc.)
N<Ulle ~----~-,-------------------------~
---------------City----------Street Address
State ----Zip Code ____ _ E-Mail Address ------------
Phone Number Fax Numbt:r ~-----~~~------------s m PLAN AT'l't.lCA TION 1 of3
SITEAPP 04/ 13/99
·u o ' " ' u "* ""* o v ~VV •
' l
CURRENT ZONING C 1 ~~~~~~~~~-
PRES ENT USE OF PROPER 1Y---1L-~"'-'-___,IL...L."_.__ __ C~H-'--I A:J.;;;._e;;......;~;;_£ ____ /& S 1'"M b+N""f
_ ... ·--------... f.a:>c i.~ ..... PAc..u~ t>~e
?t>t-1' tt>~ o.:' ko-r 2'2-g PAu 1 ~C:t
PROPOSED USE OF PROPERTY !>)At.qt.~ .S f ttAA I\(.~¥--~---~
____ .. _ _:__····-·--· ... -................... ~. t414,o ... t;,f !>OU._.\)l~C:.
VARIANCE($) REQUESTED AND REASON(S)
#OF PARKTNG SPACES REQUIRED S"'f> #OF PARKING SPACES PROVIDED . ~
MUT .... Tl-FAMTLY RESIDENTIAL
Total Acreage ___ _
Ji'loodplain Acreage ___ ........
Housing Units ___ _
# of 1 Bedroom Units
# of2 Bedroom UnitS
# of 3 Bedroom Units
# of 4 Bedroom Units
FOR 2 IlEDROOM UNITS ONLY
__ # He:drooms >-132 sq. ft.
__ # Bedrooms < 132 sq. ft_
COMMERCIAL
Total Acreage l .~1.S~
Building Square FL:cl 14,~tlo
Floodplain Ac.re..;.ge -0 -
The applicant has prepared this application and certifies that the facts stated herein and e::chibiJ:; a/Jached
hereto are true and correct.
-~~t?----~ntor Applicant
SITE PLAN APPt JC.I\ TYON
ST1VEAPP 04/13/99
Date
JofJ
WALGREEN$ #6822 """" _.,,,,,,~<-.q
TEXAS AVENUE V\
COLLEGE STATION, TEXAS
ITEM DESCRIPTION UNIT
6" FIRE LINE
QTY.
BUDGET ESTIMATE
6" FIRE LINE
BUDGET
UNIT PRICE
BUDGET ACTUAL
$ $
-----
5/25/01
Rev. 0
PAID TO DATE
$
----------·-------. --------------·--6_': Tapp_!_ng Sl_e~ve & ~alve Allow 1 1..._500.Q_O --- _ $2,00q_ -------·--6" _F'ipe !_? Building to LF 140 30.00 $4,200 -----------------·---Double Check at Riser -----·------------BUDGET AMOUNT ($/SF & Total) 44.29 $6,20~------------------CONTRACT AMOUNT $0.00 $0.00 -----------------------------
GENERAL CONDITIONS -------· --General Contractor Overhead/Fee % 12 6,200.00 $744 ----1-----·--~aterials Testing Allow 1 1,000.00 $1,000 ---BUDGET AMOUNT ($/SF & Total) 12.46 $1 ,744 --------
CONTRACT AMOUNT $0.00 $0.00
PROJECT BUDGET SUBTOTAL $56.74 $7,944
PROJECT ACTUAL SUBTOTAL $0.00 $0.00
PROJECT SUMMARY
PIPE LENGTH = 140 LF BUDGET ACTUAL PAID TO DATE
BUILD-OUT COST SUBTOTALS $7,944 $0.00 $0.00
CONTINGENCY 5% $397
BUILD-OUT COST TOTALS $8,341 $0.00 $0.00
BUILD-OUT COST TOTALS/LF $59.58 $0.00 $0.00
Page 1 of 1
DEVELOPMENT SERVICES
NCC>R.PC>R.A.IE.D
May 25, 2001
City of College Station, Texas
Development Services
1101 Texas Avenue
College Station, Texas 77842
Attn: Ms. Bridgette George
Re: Site Plan Application
Walgreen's Store #6822
___ Texas Avenue (@ Brentwood Dr.)
College Station , Texas 77842
Ms. George:
cr'Y'-~1-01
1 OA1v\, 61~
900 TOWN & COUNTRY LANE
SUITE 220
HOUSTON, TEXAS 77024
PHONE: 713-647-9211
FAX : 71 3-647-9113
E-MAIL: devserv@swbell.net
Please find enclosed our Resubmittal of the Site Drainage Plan , Drainage
Report, and TxDOT Permit for the above referenced project. I have enclosed
two (2) sets of drawings & reports and the original & three (3) copies of the
TxDOT Permit as requested in your comment letter.
The following is a written response to the items in your letter:
ENGINEERING
1. No action required.
2. The requested permits are attached .
3. We have used a Tc of 10 minutes.
4. The calculations were modified as follows:
a. The cross-sectional area of all pipes has been reduced by 25%.
b. The onsite piping is specified as ADS or PVC .
c. Velocities at outfalls are shown in report. Rip-rap has been added
to outfalls per our meeting with Randy Granes at TxDOT. Outfall
pipes have also been aligned perpendicular to R.O.W. for future tie-
in to Inlet Boxes per TxDOT's request.
d. The area drain calculations have been added to report using a 6"
maximum depth based on proposed site grading conditions.
5. No action required.
6. The retaining wall is an existing structure to be demolished.
•
7. A plan & profile sheet for the 6" fire line has been provided. A detailed
estimate is attached.
8. Our construction plan is to complete the paving before construction on the
building begins. The existing driveway on Texas will remain and be used
as the primary construction entrance during the first phase which will
include installation of Drainage System #1 and associated paving. After
the Phase I paving is completed , we will begin installation of Drainage
System #2 and associated paving. During Phase 11 , the new Brentwood
Driveway will be used for primary access. We have found that when
working on sites this small this practice resolves the issues with sediment
control on adjacent streets. However, the Contractor will bear the
responsibility of cleaning up any debris or sediment from our jobsite on
adjacent roadways as always.
MISCELLANEOUS
1. Added Note 8 on SC-6.
2. Added Note 9 on SC-6.
Please call me if you have any questions regarding the items addressed in this
resubmittal.
Sincerely,
Steven W. Griggs ,~
~-~
COLLEGl ~TATION
DEVELOPMENT PERMIT
PERMIT NO. 100036
DP-W ALGREENS #6822
FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA
RE: CHAPTER 13 OF THE COLLEGE STATION CITY CODE
SITE LEGAL DESCRIPTION:
WALGREEN'S
PARKWAY PLAZA PH. 6
DATE OF ISSUE: JUNE 28, 2001
OWNER:
CHANG,IlMMY
2322 TEXAS A VE S
COLLEGE STATION, TX 77840
TYPE OF DEVELOPMENT:
SPECIAL CONDITIONS:
SITE ADDRESS:
2322 TEXAS A VE S
DRAINAGE BASIN:
BEE CREEK
VALID FOR 12 MONTHS
CONTRACTOR:
FULL DEVELOPMENT PERMIT
Work in TXDOT ROW to be done after issuance of permit(s).
All construction must be in compliance with the approved construction plans
All trees must be barricaded, as shown on plans, prior to any construction. Any trees not barricaded will not count
towards landscaping points. Barricades must be 1' per caliper inch of the tree diameter.
The Contractor shall take all necessary precautions to prevent silt and debris from leaving the immediate construction site
in accordance with the approved erosion control plan as well as the City of College Station Drainage Policy and Design
Criteria. The Owner and/or Contractor shall assure that all disturbed areas are sodden and establishment of vegetation
occurs prior to removal of any silt fencing or hay bales used for temporary erosion control. The Owner and/or Contractor
shall also insure that any disturbed vegetation be returned to its original condition, placement and state. The Owner
and/or Contractor shall be responsible for any damage to adjacent properties, city streets or infrastructure due to heavy
machinery and/or equipment as well as erosion, siltation or sedimentation resulting from the permitted work.
Any trees required to be protected by ordinance or as part of the landscape plan must be completely fenced before any
operations of this.permit can begin.
In accordance with Chapter 13 of the Code of Ordinances of the City of College Station, measures shall be taken to
insure that debris from construction, erosion, and sedimentation shall not be deposited in city streets, or existing drainage
facilities.
I hereby grant this permit for development of an area outside the special flood hazard area. All development shall be in
accordance with the plans and specifications submitted to and approved by the City Engineer in the development permit
application for the above named project and all of the codes and ordinances of the City of College Station that apply.
If it is determined the prescribed erosion control measures are ineffective to retain all sediment onsite, it is the
contractors responsibility to implement measures that will meet City, State and Federal requirements.
~ ~1~1-~1-~r~~~ Date I I
c::D-~W.CZJ~~
Owntlgent/Contractor
I I
Date
DEVELOPMENT SERVICES
NCC> R. PC> R..A..I E. C>
May 25 , 2001
City of College Station, Texas
Development Services
1101 Texas Avenue
College Station, Texas 77842
Attn : Ms. Bridgette George
Re : Site Plan Application
Walgreen's Store #6822
___ Texas Avenue(@ Brentwood Dr.)
College Station , Texas 77842
Ms. George:
~<S-t'CVo ~ o\J
900 TOWN & COUNT Y ~
SUITE 220
HOUSTON. TEXAS 77024
PHONE: 713-647-9211
FAX: 713-647-9113
E-MAIL: devserv@swbell.net
Please find enclosed our Final Submittal of the Site Design Drawings for the
above referenced project as requested for your approval. I have enclosed six (6) .
complete sets of drawings, two (2) additional site plans, and one (1) additional
landscape plan as requested in your comment letter dated May 11, 2001 .
Please call me if you have any questions regarding the items addressed in this
resubmittal.
Sincerely,
5f~ .. ~~-:w . Griggs.W.
,.
STAFF REVIEW COMMENTS NO. 1
Project: DP -WA LGREEN 'S STORE-DEVELOPMENT PERMIT (1-100036)
ENGINEERING
1. It is my opin ion that detention will not be required by the City of College Station on
this project. However, your final drainage report will be included with your TXDOT
permit. TXDOT will not allow any increase in rainfall runoff to TXDOT ROW.
2. Concerning you r TXDOT permit, the permit MUST be signed by the "owner".
TXDOT wi ll not accept any other signature. Please submit an original permit signed
by the own er and 3 copies.
3. Concerning you r drainage report, please show calculations for Tc. Please
remember, our Tc, minimum is 10 minutes.
4. Concerning you r storm sewer design, th is is considered a private system and we do
not dictate the design criteria for private systems. However, we do evaluate the
impact your design has on the area and the down stream system using our criteria.
Please see Design Manual for details. Please show the following calculations:
a. On pipes 24" and less, the cross sectional area, (A) in Manning's equation
(twice), is red uced by 25%.
b. Manning's "n" is 0.014 for RCP .
c. Please show exit velocities for storm water pipe outlets. End treatments may be
required.
d. If ponding is produced at the area drains , a maximum 8" depth is allowed.
Please show area drain inlet calculations per the design guide. The area of the
drain is red uced by 25%.
5. The TXDOT permit will be submitted when Drainage Report has been approved.
6. There is a retain in g wall shown on the civil plans. Please provide a detail of the
proposed retaining wall.
7. The 6" fire line is considered public infrastructure from the main to the backflow
preventer. A profi le view of this line is required. Please show this on the
construction drawi ngs and include all conforming specifications necessary for
constru ction an d inspection by the City. A sealed engineer's detailed cost estimate
of the water line is also required. Th is is for City Public Works Dept. purposes only.
8. Please prov ide an Erosion Control Plan . Please include BMPs necessary to contain
all sediment on site. This may include construction entrance, wash down area, area
drain protection, etc.
Reviewed by : Spencer Thompson
Staff Review Comments
J:IPZTEXT\PZ04813.DOC
Date: May 10, 2001
Page 1of1
MISCELLANEOUS
1. Irrig ati on system mu st be protected by either a Pressure Vacuum Breaker or
Red uced Pres su re Prin ciple Back Flow Device and installed as per City Ord inance
2394.
2. Back Flow devises must be tested upon in stallation as per City Ordinance 2394.
Reviewed by : Rob Werley
NOTE: Any changes made to th e plans, that have not been requested by the City of College Station,
must be explained in your next transmittal letter and "bubbled" on your plans. Any additional changes on
these pla ns that ha ve not been pointed out to the City, will constitute a completely new review.
Staff Review Comments
J:\PZTEXT\PZ04813.DOC
Page 2of1
-Transmit Log Record BitWare Client Page 1
Status Log Date Time To Company Application
OK 484 5/12/01 12:11 :54 Steven Griggs, P.E. Texas -Brentwood R Microsoft Word -PZ04829.DOC
~ it
~;:~a;,ent
lot°:ransporlation
Form 1023
{Rev. 3/99)
{Electronic version GSD-EPC Word 97)
Page 1of 2
Notice of Proposed Installation
Utility Line on Non-Controlled Access Highway
To the Texas Transportation Commission
c/o District Engineer
Date _ ___,,0'--'"/-=o_l.:..+(_o__.l.__ __
Texas Department of Transportation
f2l1-..'{ActJ , Texas
Formal notice is hereby given that T-e.XA.6 -~u)O?D &1ML I L. e.
Company proposes to place a \it2u 4 I '5 "P~ .z,al,,.U~
line within the right-of-way of Mf ~ C ~~ AV'~) in ~ County
Texas as follows: (give location, length, general design, etc.)
~0(2A.A. (..A) A:~ G rZ-e>ul~At.. L-$ f<:><2...
~1!3lt..G) ~ "D€J)c;cu::::{>~~-r @,,
~ott--rbf w c.~e:n.'-''-'/ C.rYtL~ ~
-f~¥,A::·~ M£ tfr ~ui.ScrnD DfLt
The line will be constructed and maintained on the highway right-of-way as shown on the attached drawing and in
accordance with the rules, regulations and policies of the Texas Department of Transportation (TxDOT), and all governing
laws, including but not limited to the "Federal Clean Water Act," the "National Endangered Species Act," and the "Federal
Historic Preservation Act." Upon request by TxDOT, proof of compliance with all governing laws, rules and regulations will
be submitted to TxDOT before commencement of construction.
Our firm will use Best Management Practices to minimize erosion and sedimentation resulting from the proposed
installation, and we will revegetate the project area as indicated under "Revegetation Special Provisions."
Our firm will ensure that traffic control measures complying with applicable portions of the Texas Manual of Uniform Traffic
Control Devices will be installed and maintained for the duration of this installation.
The location and description of the proposed line and appurtenances is more fully shown by ~
~~~~~~~~~-comp I et e sets of drawings attached to this notice.
Construction of this line will begin on or after the \~ dayof --=J'--u_L--1Lf'----' ~I.
By signing below, I certify that I am authorized to represent the Firm listed below, and that the Firm agrees to the
conditions/provisions included in this permit.
Firm }~<-.
By (Print) i)-fe'.---/~ l.0. 6,e..J,6,C/ S:-
Signature
Title V;c..~ Pf2-,Cs1D~
Address q~ J"<AJAJ r( &nJAJr'ry LA) 4';,ZZD
t/Pu~-to'4.J J 'k~ 11oz(
Phone No. 11 t {Rij 'J _, tt -i I)
Forrn"1023
(Rev. 3199)
Page 2 of 2
..
To:'fe-!AcS "~~~ ~'f~L 1 Lf'.
Cf@ Tu'()J.:) tf (}gr2!Sf_4JJ UJ ~tlo
~~--r~ 1 /~ 77ozf
APPROVAL
Hw~No.~~~-{_,#~~~~~~~~~~~~~~~
Beg. RM Offset End RM Offset
--~ ~~-----
Maintenance Section No. ---------------
-=B:..:...ra=z=-==o=-=s'-----__________________ County
Date _____________________ ~
TxDOT offers no objection to the location on the right-of-way of your proposed ~:zrfc:f4tt.o)Plt~
line as shown by accompanying drawings and notice dated '5/tZ? / o I except as noted below.
I t
It is expressly understood that the TxDOT does not purport, hereby, to grant any right, claim, title, or easement in or upon
this highway; and it is further understood that the TxDOT may require the owner to relocate this line, subject to provisions
of governing laws, by giving thirty (30) days written notice.
You are requested to notify this office prior to commencement of any routine or periodic maintenance which requires
pruning of trees within the highway right-of-way, so that we may provide specifications for the extent and methods to
govern in trimming, topping, tree balance, type of cuts, painting cuts and clean up. These specifications are intended to
preserve our considerable investment in highway planting and beautification, by reducing damage due to trimming.
The installation shall not damage any part of the highway and adequate provisions must be made to cause minimum
inconveniences to traffic and adjacent property owners. In the event the Owner fails to comply with any or all of the
requirements as set forth herein, the State may take such action as it deems appropriate to compel compliance.
• General Special Provisions:
see attachment
• Revegetation Special Provisions: In order to minimize erosion and sedimentation resulting from the proposed
installation, the project area will be revegetated
l8l in accordance with TxDOT's Standard Specification Item 164 which specifies the appropriate grass seed mix to
be used or
D as indicated on the attachment.
Please notify forty-eight (48) hours prior to ---------------------------~ starting construction of the line in order that we may have a representative present.
Texas Department of Transportation
By ----------------------District Enqineer -District No._B_r_....y_a_n __________ _
...
STAFF REVIEW COMMENTS NO. 1
Project: DP-WALGREENS #6822-DEVELOPMENT PERMIT (1-100026)
ENGINEERING
1. Please complete a "Development Permit Application".
2. I have asked that the waterline easement be dedicated with the plat.
3. I will need to review the following for the permit to be issued:
Application
Grading Plan
Erosion Control Plan
TXDOT Permit, if any site work is to be done in TXDOT ROW.
Reviewed by: Spencer Thompson Date: April 16,2001
NOTE: Any changes made to the plans, that have not been requested by the City of College Station,
must be explained in your next transmittal letter and "bubbled" on your plans. Any additional changes on
these plans that have not been pointed out to the City, will constitute a completely new review.
Staff Review Comments Page 1of1
...
DRAINAGE REPORT
FOR
WALGREENS STORE #6822
LOT 1R-A
PARKWAY PLAZA SUBDIVISION, PHASE SIX
COLLEGE STATION, BRAZOS COUNTY, TEXAS
MAY 25, 2001
DEVELOPED BY:
REALM REAL TY
900 TOWN & COUNTRY LANE, SUITE 210
HOUSTON, TEXAS 77024
(713) 465-0001
PREPARED BY:
DEVELOPMENT SERVICES, INC.
900 TOWN & COUNTRY LANE, SUITE 220
HOUSTON, TEXAS 77024
(713) 647-9211 s
REVIEWED FO R co~.~PLL~RE
JU N o 1 zo01\)
COLLEGE STATION
ENGINEERING
TABLE OF CONTENTS
DRAINAGE REPORT
APPENDIX 1 -METHODOLOGY & RUN-OFF CALCULATIONS
APPENDIX 2 -GRADING & DRAINAGE PLAN OF PROPOSED IMPROVEMENTS
GENERAL LOCATION & DESCRIPTION
THE PROPOSED DEVELOPMENT IS LOCATED ON A 1.326 ACRE TRACT OF LAND LOCATED
ON THE NORTHWESTERLY CORNER OF TEXAS AVENUE AND BRENTWOOD DRIVE. THE
1.326 ACRES INCLUDES THREE SEPARATE EXISTING TRACTS THAT ARE CURRENTLY
DEVELOPED FOR COMMERCIAL USE . THESE TRACTS HAVE BEEN REPLATTED AS LOT1 R-1
OF THE PARKWAY PLAZA SUBDIVISION, PHASE SIX.
ACCORDING TO FIGURE 11-1 OF THE CITY OF COLLEGE STATION , DRAINAGE POLICY AND
DESIGN STANDARDS BOOK, THIS PROPERTY IS LOCATED IN THE BEE CREEK DRAINAGE
AREA OF THE CARTER CREEK DRAINAGE BASIN.
SITE DRAINAGE -EXISTING CONDITIONS
THE EXISTING IMPROVEMENTS INCLUDE A CHINESE RESTAURANT, A PAWN SHOP, AND
ASSOCIATED CONCRETE AND ASPHALT PAVING . THE PROPERTY PRESENTLY HAS
APPROXIMATELY 55,000 SF OF IMPERVIOUS AREA. THE EXISTING DRAINAGE IS DESIGNED
TO SHEET FLOW THROUGH THE DRIVEWAYS AND A CONCRETE FLUME IN THE
SOUTHEASTERLY CORNER NEAR THE INTERSECTION .
SITE DRAINAGE -PROPOSED
THE PROPOSED IMPROVEMENTS WILL INCLUDE A 14,490 SF BUILDING AND ASSOCIATED
CONCRETE PAVING. THE PROPERTY WILL HAVE APPROXIMATELY 49,000 SF OF
IMPERVIOUS AREA. THE DRAINAGE HAS BEEN DESIGNED FOR STORMWATER TO BE
COLLECTED IN AREA INLETS AND ROUTED VIA UNDERGROUND PIPE TO TWO (2) OUTFALL
LOCATIONS ALONG THE DITCH ON TEXAS AVENUE.
DRAINAGE DESIGN CRITERIA
REFER TO ATTACHED SHEETS FOR METHODOLOGY AND RUN-OFF CALCULATIONS FOR A
TWO (2) YEAR STORM EVENT AND 100 YR STORM EVENT.
DRAINAGE SUMMARY
THE PROPOSED IMPROVEMENTS PROVIDE A POSITIVE IMPACT TO THE EXISTING
DRAINAGE CONDITIONS OF THE AREA TODAY. THE NEW ONSITE STORMWATER
COLLECTION SYSTEM WILL ROUTE MORE RUN-OFF FROM THE SITE DIRECTLY TO THE
DRAINAGE DITCH ON TEXAS AVENUE . RUN-OFF THROUGH THE DRIVEWAYS FOR A TWO (2)
YEAR EVENT HAS BEEN ELIMINATED. ACCORDING TO CALCULATIONS, THE 100 YEAR
EVENT FLOW THROUGH THE DRIVEWAYS HAS BEEN ELIMINATED AS WELL DUE TO THE
DECREASE IN IMPERVIOUS AREA AND THE ADDITION OF THE NEW ONSITE STORMWATER
COLLECTION SYSTEM.
WALGREENS #6822
TEXAS AVENUE AND BRENTWOOD DRIVE
ON-SITE STORM WATER CALCULATIONS
METHODOLOGY
The Basis for the calculations on the following pages is as follows:
Pipe Velocity and Fl ow Rates as shown on the following pages are based on the following:
V= 1.486 * R213 * S 112 O= V *A* 0.75
n
n = 0.013
R = Hydraulic Radius of Pipe, Feet
S = Slope of Pipe, Feet/Feet
A = Cross-sectional Area of Pipe, Square Feet
Run-Off Calculations:
Ra infall Intensity, I = b Rainfall Intensity calculated using TxDOT Tables for Brazos County
For a 2 Year Storm
b=
e=
d=
I =
65
0.806
8
65
(12 + 8)0.806
Run-off Factor per Acre
(tc + d)
tc = 10 min.
6.33
For a 100 Year Storm
b=
e=
d=
I=
96
0.73
8
96
(12 + 8)0730
10 min.
7.40
C= 0.9 , Based upon fully developed conditions C= 0.9 , Based upon fully developed conditions
O= CIA
O= 5.69 CFS/Acre
Post-Developed Run-Off Area (A2) =
Pre-Developed Run-Off Area (A1) =
For a 2 Year Storm
6.4049 CFS
7.19 CFS
1.12 Acres
1.26 Acres
Re quired Storage Volume (S) for Areas less than 50 Acres =
0 100 = CIA
0 100 = 6.66 CFS/Acre
For a 100 Year Storm
O post = 7.492 CFS
8.409 CFS
C5 xA
DETENTION IS NOT REQUIRED SINCE THE PROJECT HAS REDUCED THE AMOUNT
OF STORMWATER RUN-OFF COMPARED TO EXISTING CONDITIONS.
Grate Inlet Calculations
Q= 4.82 * 0.75Ag * y1/2 4.757 CFS
Ag= 1.861 SF
y= 6 IN
(Based on 24x24 Area Inlet, Type A-2)
0.50 FT
Page 1 of 3
INLET
DRAINAGE l~UMBER &
AREA SIZE
1 ROOF --------------
2 AD12
3 AD11
OUTFALL #1
4 AD13 ------------------------------
AD11
INLET DRAINAGE NUMBER &
AREA SIZE
5 AD23
6 AD22
7 AD21
OUTFALL #2
RUN-OFF
AREA
(ACRES)
0.33
0.25
0.12
0.13
RUN-OFF
FACTOR
<CFS/ACRE)
5.69
5.69
5.69
5.69
RUN-OFF
BY AREA
ICFSl
1.88
1.42
0.68
0.74
WALGREENS #6822
TEXAS AVENUE AND BRENTWOOD DRIVE
ON-SITE STORM WATER CALCULATIONS
STORM SEWER CALCULATION SHEET
SYSTEM 1 -2 YEAR EVENT
BRANCH RUN CUMMULATIVE
OFF (CFS) RUN-OFF
PIPE RUN
(FROM-TO)
PIPE SIZE
(IN) (CFS)
1.88 12" HEADER -AD12 15
3.30 AD12-AD11 18
0.74
4.73 AD11 -OUTFALL #1 21
0.74 AD13 -AD11 12
SLOPE
(%)
0.25%
0.25%
0.25%
0.35%
INVERT
PIPE RUN ELEV. IN
(LF) (FT)
100
293.6
184
293.0
30
292.8
62
INVERT
ELEV. OUT
(FT)
293.8
293.5
292.9
293.3
---------------------------SfE-.i•.EicivE __________ ---------------------------------------------------------------------------------------------------------------------29i1 ____ ----292.9 __ _
RUN-OFF
AREA
(ACRES)
0.26
0.12
0.12
RUN-OFF
FACTOR
(CFS/ACRE)
5.69
5.69
5.69
RUN-OFF
BY AREA
(CFSl
1.48
0.68
0.68
STORM SEWER CALCULATION SHEET
SYSTEM 2 -2 YEAR EVENT
BRANCH RUN CUMMULATIVE
RUN-OFF
OFF (CFS) <CFS\
1.48
2.16
2.85
PIPE RUN
(FROM-TO)
AD23-AD22
AD22-AD21
AD21 -OUTFALL #2
Page 2 of 3
PIPE SIZE
(IN)
15
15
18
SLOPE
(%)
0.25%
0.25%
0.25%
INVERT
PIPE RUN ELEV. IN
(LF) (FT)
194
294.6
34
294.4
25
294.3
INVERT
ELEV. OUT
(FT)
295.1
294.5
294.3
HYO.
RADIUS
(FT)
0.3120
0.3750
0.4370
0.2500
HYO.
RADIUS
(FT)
0.3120
0.3120
0.3750
VELOCITY
(FT/S)
2.6291
2.9721
3.2913
2.6837
VELOCITY
(FT/S)
2.6291
2.6291
2.9721
5/25/01
AREA
(SF)
Qmax
(CFS)
1.2270 2.4195
1. 7670 3.9388
2.4050 5.9367
0.7850
AREA
(SF)
1.5800
Qmax
(CFS)
1.2270 2.4195
1.2270 2.4195
1.7670 3.9388
DRAINAGE
AREA
3
4
INLET
NUMBER &
SIZE
ROOF
AD12
AD11
OUTFALL#1
AD13
AD11
RUN-OFF
AREA
(ACRES)
0.33
0.25
0.12
0.13
DRAINAGE INLET RUN-OFF
AREA NUMBER & AREA
SIZE IACRESl
5 AD23 0.26 -------------------------------------------------
6 AD22 0.12
AD21 0.12
OUTFALL #2
RUN-OFF
FACTOR
(CFS/ACREl
6.66
6.66
6.66
6.66
RUN-OFF
FACTOR
(CFS/ACRE)
6.66
6.66
6.66
RUN-OFF
BY AREA
ICFSl
2.20
1.67
0.80
0.87
RUN-OFF
BY AREA
CCFS)
1.73
0.80
0.80
WALGREEN$ #6822
TEXAS AVENUE AND BRENTWOOD DRIVE
ON-SITE STORM WATER CALCULATIONS
STORM SEWER CALCULATION SHEET
SYSTEM 1 -100 YEAR EVENT
BRANCH RUN CUMMULATIVE
RUN-OFF
OFF (CFS) ICFSl
2.20
3.86
0.87
5.53
0.87
PIPE RUN
(FROM-TO)
12" HEADER -AD12
AD12-AD11
AD11 -OUTFALL #1
AD13-AD11
PIPE SIZE
(IN)
15
18
21
12
STORM SEWER CALCULATION SHEET
SYSTEM 2 -100 YEAR EVENT
BRANCH RUN CUMMULATIVE RUN-OFF OFF(CFS) CCFSl
1.73
2.53
3.33
PIPE RUN
(FROM-TO)
AD23-AD22
AD22-AD21
AD21 -OUTFALL #2
Page 3 of 3
PIPE SIZE
(IN)
15
15
18
SLOPE
(%)
0.25%
0.25%
0.25%
0.35%
SLOPE
(%)
0.25%
0.25%
0.25%
INVERT INVERT HYO.
PIPE RUN ELEV. IN ELEV. OUT RADIUS
(LF) (FT) (FT) (FT)
293.8
100 0.3120
293.6 293.5
184 0.3750
293.0 292.9
30 0.4370
292.8
293.3
62 0.2500
293.1 292.9
INVERT PIPE RUN ELEV. IN
(LF) IFTl
194
294.6
34
294.4
25
294.3
INVERT HYO.
ELEV. OUT RADIUS
IFTl IFTl
295.1
0.3120
294.5
0.3120
294.3
0.3750
VELOCITY
(FT/S)
2.6291
2.9721
3.2913
2.6837
VELOCITY
(FT/S)
2.6291
2.6291
2.9721
5/25/01
AREA
(SF)
Qmax
(CFS)
1.2270 2.4195
1. 7670 3.9388
2.4050 5.9367
0.7850 1.5800
AREA
(SF)
Om ax
(CFS)
1.2270 2.4195
1.2270 2.4195
1. 7670 3.9388