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Home My WebLink AboutSewer/Water Report Engineering Report on Water and Sewer Demand For Century Hill Subdivision 36.92 Acre Fronting Earl Rudder Freeway and Sebesta Road College Station, Brazos County, Texas Prepared By: Garrett Engineering slaT e z; 4444 Carter Creek Parkway, Suite 108 * ' Ate/ ff wag Bryan, TX 77802 r 641q4 Phone : (979) 846-2688 C • Fax : (979) 846-3094 I4`''- PErZ Engineering Report Century Hill Subdivision 36.92 Acre Fronting Earl Rudder Freeway and Sebesta Road College Station,Brazos County, Texas The proposed development is located on a 31.42 acre tract of land conveyed to Brazos Valley Construction, Emanuel Glockzin, Jr., president in vol. 3687, pg. 317 (recorded in Brazos County Official Deed Records), same being in the MORGAN RECTOR SURVEY, Abstract No.46, College Station, Brazos County, Texas, and located approximently 700 ft north of the intersection of Sebesta Road and the feeder road of North Earl Rudder Freeway (State Highway 6). See vicinity Map. The proposed subdivision will consist of 9 commercial lots and 6 industrial lots. Please see Fig. 1 for the Preliminary Plat. 1. Water Improvements: Proposed 6" PVC water line is to be connected to the existing 12" water line along the Earl Rudder Freeway. This water line will be looped into the 12"public water line on Sebesta Road. Calculations for the Peak Domestic Water Demand: Reference : City of Bryan, Design Guideline Manual Land Use Determination(Method 2) is used to determine the normal flows by which the water system is to be designed. Use : Commercial/Industrial Designing the water system based on Commercial use yields conservative results for future use. Table III: Average water demands for commercial/industrial use= 50 GPD/CAP Population factor for commercial land uses= 30 Average Daily Flow= 50 X 30 X 36.92 =55,380 GPD Adjusted Daily Flow= 1.5 X Average Daily Flow=1.5 X 55,380= 83,070 GPD Peak Hourly Flow = 3.0 X Adjusted Daily Flow=249,210 GPD = 3.0 X 83,070/24 GPH = 10,383.75 GPH = 3.0 X 83,070/(24X60)=173 GPM = 3.0 X 83,070/(24X60)X 2.228X10-3=0.386 Cfs Fire Flow Capacity Calculations: To be submitted under separate cover. l 2. Sanitary Sewer Improvements: Proposed 8" sanitary sewer line is to be connected to the existing 8" sanitary sewer line along Sebesta. Please see Fig. 1 for the Preliminary Plat. Calculations for the Peak Sewer Demand: Reference : City of Bryan, Design Guideline Manual Land Use Determination(Method 2) is used to determine the normal flows by which the water system is to be designed. Use : Commercial/Industrial Designing the water system based on Commercial use yields conservative results for future use. Table III: Average water demands for commercial/industrial use= 50 GPD/CAP Population factor for commercial land uses= 30 Average Daily Flow= 50 X 30 X 36.92 =55,380 GPD Adjusted Daily Flow= 1.5 X Average Daily Flow=1.5 X 55,380 =83,070 GPD Peak Hourly Flow = 3.0 X Adjusted Daily Flow=249,210 GPD = 3.0 X 83,070/24 GPH = 10,383.75 GPH = 3.0 X 83,070/(24X60)= 173 GPM = 3.0 X 83,070/(24X60)X 2.228X10-3=0.386 Cfs Calculations for pipe velocity: All Sanitary Sewer pipe line was designed at 8"dia. having a slope at 0.4%. Pipe Material is either PVC or ductile iron depending upon soil cover. Check for Velocity with Manning's Equation: V= 1.49(R 213 X S 1/2)/n For both"Pipe full flow"and "Pipe half flow" situation; R =Radius of the pipe S =0.004 n =0.009 for PVC Pipe and n= 0.012 for ductile iron For PVC Pipe Sections: Half Flow: V =(1.49/0.009) X( 0.167 2/3 X 0.00412 )= 3.17 fps. Full Flow: V=(1.49/0.009)X( 0.333 2/3 X 0.004 1/2 )= 5.03 fps For Ductile Iron Pipe Sections: Half Flow: V =(1.49/0.012) X( 0.167 2/3 X 0.004 112 )=2.38 fps. Full Flow: V=(1.49/0.012)X( 0.333 2/3 X 0.00412 )= 3.78 fps Minimum Velocity with pipe half full should be 2.5 fps. Maximum Velocity with pipe full should be 8.0 fps. Full capacity of 8"dia. PVC Pipe= 5.03 X 7C 0.332= 1.75 cfs. Full capacity of 8" dia. Ductile Iron Pipe=3.78 X It 0.332 = 1.32 cfs. 2 .--"`", 0 immimC PROJECT LOCATION # 4 A0, "59 % ite '444 / i f o` 111 L‘\, L. STATE HIGHWAY 6trtf $ 1 Atti QPa 4 4, P A illi I VICI \ ITY VAP N.T.S. EASEMENTS c /_ / NOTES. ."EasementSANITARY SOO O Pipeline to Humble Pipeline Co. as recorded in Vo1.49 Pae 24. (Blanket). L RIM ELEV.••27 :k� l 1.*Deed Bearing US2Cas Basis of Bearing. , 20 Wide aElectrical Easement to < City of Bryan as recorded in Vo1.98 Page 76. (Blanket), • : year flood hazard Pro ertY does -not lie within the 100 -- _ area as established b the Federal Emer enc Mana ement 10': Wide Right of --Way Easement to City of College Station as recorded in Vol.418 Page 527. ,(Shown):: Y Y g Y g Agency (FEMA -(FEMA)., Flood Insurance Rate Map (FIRM) Community SCALE. 1 -- � - 10' Wide. Right -of -Way Easement to Cityof College Station as .recorded in Vo1.418 Pae 53Q. (Shown). 100 g g ( ) Panel No. 48041 CO 163 C, Effective Date July 1992. 10Wide Water Line Easement to Foxfrre Development Corporation as recorded in Vo1.351 Pae 82. ho n : � P P 9 1 (S w) -t= rrnwry / \ Current tonin is as shown and as such the proposed Land use 9 , 15_ Wide Water Line Easement to City of College Station as record of 1 y � ed�in v .s 4 ,Page 3s. (Shown)..•...-:;.:;�•....::::::::.:;.:•.\ _ hall be in accordance with the current zoning,ordinance%. 10. Wide - Publ Utllrt Easement to City of College Station as records r t P _ ...,• ... , ..... - 2 - y y 9 d n Vo.612 age 589....(Shown}. D� :::::::::::::::.::::::.. :;.•Abdo ....:.. ,/ At the tti'Yle Of site development, the. IOtS are t0 ensure drainage ,� \ 'recorded-in' to the drainage facility. PROJECT 2Q Wrde Public Utility Easement to City of College Station asVoi.612 Pa e 58(Shown). 7 1/mF ..:.:.:.::.:.:.:.:.:...: ,:.:.::.:.;: � � 3.:.All property coneys to be set with a 5/8" IR with ca � G SANRAU2Y EWER' �r�.::::::::::: ' . �, l ., P P Y ; f P q X CNti X :.:::::::.:::.::.:.: `. EXISiiNG 4�:{?r38 .:.:'. tg ' -: - ::.:.:.:::.::.:.: rrrlun �:'�::;:::;::,• � 4. Lot 7 �s limited to C 1 eneral .commercial use. :.::....:......::..:.. x __............. S N ::.� of 7 .. - - :.:...:...........:...:. s. rotlons of the waterline waterline -easement (351 /1821 through L Y / n \ / ! g STATE HIGHWAY 6 �` ru h the detention and area are to be abandoned. NOW OR FOR :;:;_:;:::.. .J a and the p -' c411N Ilii ;:-,:::iii?..,;.: ...... _. ^STEPHANIE SALES SINGLETON 6. Lot 15 o be responsible for its own detention needs. \j , P 1- + 5.50 ACRES x " X, a a „ ,. (Zj :::•': : iEiiiciiii. -- PW PW - PW -^ p PROPOSED 8 . WATER LINE ::�:...: VOL 00, PG. -308. & �, ,.oo ..: s.. Nx W EXISTING WATER I P ,� ZONED M-1 x g o cb : ; S- 5 )c --- PROPOSED 8 SANITARY SEWER LINE S 0 / .. .. 15 - •:::::::::::::::;, - PROPOSED SAN.. SEWER MANHOLE S A . l` V O � A YYY •, ,,1 9 �. O L � - PROPOSED 24 RCP STORMSEWER r� Ir1k ::..•.•.:.......:... 1y '`., d sr SHOWING DIRECTION OF FLOW - tea. Dc ..:.:.:.:.:.:.:.:.:.:.:.:. w � o ,. r s ..::: :,.. _ /j EXISTING STORM SEWER 57 Q / VICINITY MAP N.T.S. o� �' ,. : . 2:15 CRE, 9 ......,... ... EXISTING ELECTRIC LINE A cN EXISTING WOOD FENCE a' 6 Q' •cN X O N' cNi co x 2.71 ACRES... , . 1..99 CRSS � ". .....::.. .. �. T aro �\ it :.:.:.:..:. 14 12 X \. D• a .t - 74:72. � • _ S °fr • N ... X o NOW, 0R FORME LY :........... ?``. ............ Pro oie., - ARC AMS TRACT : 2Q Public Ut ........:.......:. .. , o a ...:•:....:. ant........ ' .......:.:.• ..:.::: 4" � 21,.12 ACR E � .{.., .....�...:.. ': VOL. 612 PG. _589 :.:... •..: 52 ACRES N .•......... a c� - _ _ ... ... 2.65 ACRES - d- ..,... . PLATT D 103 ..,. a __ _ ..:..:...:....:.:... , Q (� - f E o 6 a' W O` " :.............. :,•. � 4 „� 2 ACRE a i l X Q .. m 1 a N CURVE RADIUS DELTA ARC TANGENT BEARING CHORD C 1 430.00 01'46'39" 13.34 6.67 N 89' 14'51 " W 13.34 C2 430.00 20'22'21 " 152.89 77.26 N 78' 10'22" W 152.09 C3 1 18.50 83'47'31" 27.06 16.60 S 70'07'03" W 24.71 C4 730.00 14'07'59" 180.07' 90.49 N 35' 17'17" E 179.61 C5 670.00 14'07'59" 165.27 83.06 N 35' 17'17" E 164.85 C6 18.50 83'47'31" 27.06 16.60 N '13'40'28" W 24.71• C7 430.00 07-51'51 " 59.02 29.55 N 51'38'18 " W 58.97 C8 370.00.• 40'21'51" 260.66 136.00 S 67'53'18'. E 255.30 C9 370.00---, r " ra 0 3 57 1 3.34 6.67 S r r � 8 '06 12 9 E 1 3.34 c 10 370.00 02'54' 1 1 " 18.75 9.38 N 40'54'11 " E 18.75 C11 370.00 40'51'33" 263.86 137.82 N 19'01'.19" E 258.30 C12 60.00 166'44'50" 174.62 516.48 N 08'01'00" w 119.20 C13 25.00 67'48'02" 29.58 16.80 N 41'27'23" E 27.89 C14 430.00 22'41l 00fl 170.24 86.25 S 18'53'52" W 169.13 C 1 5 430.00 12706'55" 90.92 45.63 S 36' 17'49" W 90.75