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2321 MAYPORT RD - DRAINAGE CALC DRAINAGE CALCULATION BOOK for Dollar Tree — Atlantic Beach M City of Atlantic Beach ' Duval County, Florida Prepared for: Dollar Tree Prepared by THOMAS E N G I N E E R I N G G R O U\`\\\ OMAS R ,.10 V.••oGENSF 4950 W Kennedy Blvd.,Suit`6 '' '• Tampa, FL 33609 : No.77996 ; 813-379-4100 — * '• i0� * • STATE OF 111 . FCORIOP'• �i� Darren T.R. Eyre, P.E. // Florida Professional Engineer License No. 77996 1 1 November 17, 2014 FT140062 . 1 I1 Table of Contents Stormwater Narrative Appendix A Location Map Appendix B Vicinity\Aerial Map rAppendix C USGS Map ' Appendix D NRCS Soils Map Appendix E FEMA Map Appendix F Stormwater Calculations Appendix G PONDS Appendix H Operation and Maintenance Guidelines Appendix I SJRWMD ERP #42-031-37016-1 I 1 1 I I Drainage Summary 1. Project Description This project proposes the redevelopment of an existing Hess Mart Gas Station into a Dollar Tree, as well as necessary infrastructure and utilities. The project is located at 2321 Mayport Road, Florida in Section 08, Township 2 South, Range 29 East. The project site is approximately 1.86 acres in size. Please refer to the Appendix A- E for location and other maps. II. Background We were able to find an active SJRWMD permit number 42-031-37016-1 which pertains to the project site. The existing building was constructed in 1989 according to the property appraiser's website. The site sheet flows into a flumes which is discharged into a dentition pond for attenuation. The project's ultimate outfall is to Sherman Creek. 1 III. Existing Features The site currently sheet flows to the back of the site into an existing retention pond through a flume. A majority of the project has a 6" curb around the parking lot, therefore there are no off- site flows to consider. Water quality treatment or attenuation is provided on-site. The existing flume on-site discharge into this system and are ultimately routed outfall east into the Sherman ' Creek. Please refer to the submitted Survey for existing site conditions. IV. Proposed Facilities On-Site The proposed stormwater conveyance system will collect runoff in a proposed dry retention p p Y pond. The runoff will be collected via grate inlets within the drive aisles. The pond will provide ' water quantity attenuation per the requirements listed in Section V of this report. No water quality treatment is required. The proposed impervious area within the parcel is 46,541 S.F. (1.07 Ac.), based on the soil type and impervious area the Curve Number (CN) was determined to be 92.04 for the post-development conditions. A Type C outfall structure is proposed in the stormwater pond which discharges into grate inlet in the north east corner of the property which ' ultimately outfalls to Sherman Creek. V. Stormwater Design Criteria ' SJRWMD: Provide 0.5" of treatment over contributing basin or 1.25" over the impervious area. For on-line treatment, an additional 0.5" treatment over the contributing basin must be added. ' Since the site discharges to an OFW, provide 50% additional treatment. Provide attenuation for the 25yr-24hr storm event. ' City of Atlantic Beach: The City will only require attenuation for the proposed redevelopment. For facilities with drainage area of less than 100 acres, the first 0.5" of runoff pursuant to Chapter 62-25 FAC. 1 VI. System Maintenance ' The proposed pond and stormwater conveyance system on-site will be the responsibility of the land owner. The on-site stormwater conveyance acts as an on-line retention system, and necessary steps shall be taken to maintain the system appropriately. The grate inlet structures and discharge control structure shall be inspected for blockage on a monthly basis, and after major storm events. Any obstruction of runoff shall be alleviated immediately in order to maintain proper functionality of the stormwater system. I I I I I I I i 1 Appendix A � Location Map 1 I 1 1 1 1 1 1 i f 1 la -+ 1 LC) 3 J .___ 1\i..... -a Assist Ln WaIgreens 1 ifP till v 0 5 r1 PROJECT SITE c. I \--- 4161 .6°.<9‘..- US Navy : 14:1 Commissary dimply Testy Thar 11 it I / SUBWAY .i Restaurants , i zi I 1/, ,$-1 r.�ayporti0 m t . i ,- 2 Mayport 0.p Ca `� Bounty Dr mip I VICINITY MAP PROJECT: DOLLAR TREE-MAYPORT ROAD AREA: CITY OF ATLANTIC BEACH. DUVAL COUNTY FLORIDA /6 PROJECT NO' FT140062 APPENDIX A jj H O M AS PREPARED BY FLJ DATE 09/29/2014 E N G I N E E R ! CHECKED BY: EMD SCALE N T S. 4950 W KENNEDY BLVD.SUITE 600,TAMPA,FLORIDA 33609-TEL.(813)379-4100 G:\2014\FT140062 - DOLLAR TREE - MAYPORT RD. - ATLANTIC BEACH\DWG\EXHIBITS_RENDERINGS\FT140062-MAPS >LAYOUT. LOCATION Appendix B Vicinity \ Aerial Map Ai Ai Ai hr ..„. iimei ;„..,,AR , 0, ,...„_. A 4.x . .. V i� t A It%,fir• '1 .. -, r - . 4041-4 • , tillmilimilif . r-,„N-s, , , ... ' .‘ ' 41 M - 4.1 4411 1 1 .>� 4! • �, .�,,. ;;;41:4 Ai • a im , • iv g k ' )0•' -1 , ^' i ilv ,.,k ;el A i v, ii Iv' ...• . . . L , „.,. 40-.0.-..lel. f 11- 4.- A! ,...„ss toil . 1 . w� � I ... , iiY x . -_-,,) , rI. PR0JECTSITE } . , = a ,, . .,1 _ .:t. * I f _ - / I ,'et ��� . • ir iii. I : :,„., ,.... 1 .., , A #,.. tr:;.- 110 1 _ A Iletik.. r. _ t t� ANNE 4� nor Ail VICINITY/AERIAL MAP PROJECT: DOLLAR TREE -MAYPORT ROAD I AREA: CITY OF ATLANTIC BEACH, DUVAL COUNTY FLORIDA M AS PROJECT NO: FT140062 PREPARED BY FLJ APPENDIX B DATE 09/29/2014 0 E N G I N E E R I N G G R ( - d 0:1)) : CHECKED BY EMD SCALE: N T.S. 4950 W KENNEDY BLVD,SUITE 600.TAMPA,FLORIDA 33609-TEL (813)379-4100 G:\2014\FTI40062 - DOLLAR TREE - MAYPORT RD. - ATLANTIC BEACH\DWG\EXHIBITS_RENDERINGS\FT140062-MAPS >LAYOUT. AERIA, � Appendix C � USGS Map i,': . MI -1 NM-- rijil _ 1 WO II ' _er�--- RopDER RD o l� co M Oak Harbor ��► • W ell .NCAYAVE o 11==' �,� , IP.334 m Siii:C-: i 0 . 0 [21,(-) % ,2111 7.-- 146 ° I �\ `4! ASST' t`LN° kft ■ T�sT j It 1 b b r ❑❑ ❑ p PROJECT SITE E) sio \I DOVE "^/O/�cu'�C,O ❑ } �'� k g „.c,, z , Q t , 1.7 W 1 ic �� =I 7. ❑ c:'�nl i A i . <:. ki_ \(f)?al) 171F OC a❑ Ts A ED ,- :O o n T^ 70 ❑DW r- � -t m � .m o ` AND RD W z Z. .-_ .� Q 1 f ` I LEWIS ST Z yip, c. r-r-,,, { LINK, DE _12TH•ST ❑,6,9 __ _ LE D) ) r hinneor i 11TH ST 1 11 r_ y 0=- -' •� tUTH ST ❑� — -----�� SAtL�F/SH=DR W oll L''''-'----- ❑ cn V❑ Cr, !'� 9TH ST■ USGS MAP 11111a, ■ PROJECT: DOLLAR TREE-MAYPORT ROAD /►< AREA: CITY OF ATLANTIC BEACH, DUVAL COUNTY FLORIDA HOMAS PROJECT NO: FT140062 APPENDIX:C III PREPARED BY: FLJ DATE: 09/29/2014 E N G IN E E R I N G G R O U P CHECKED BY: EMD SCALE: NT.S. 4950 W KENNEDY BLVD,SUITE 600,TAMPA,FLORIDA 33609-TEL:(813)379-4100 � Appendix D � NRCS Soils Map 1 1 I b b N IM Eb bz on 4 I eirer �. .• y}Q$Q{ _ -, , , . pip I Ai { O pp MMp v 0 Q I re a .. . U ail 1 O N ,i ii+ o U) 2 p i, $ CO Ij i f4 O N 7 i Ai "� rl i ' .E 'AA 41111 M .. _ W il 1 Jr Vi _' -- - i Lil g 1 A "1 Al a II 111 M.6bK JO - • I AA.6b bZ.S8 OL9LS££ 099LS££ 059[5££ Ob9L5££ 0£9[5££ OZ9L5££ OI9LSEE 009LSEE 065LS££ 08SLSE£ 1 z z b N 14 I 1 1 O m a) o o c o m m N o o .L..� 7 `° • Z 0 ' V N(�p 0 N U N U CO I a) 1 N N U N O 0 0 r Co Co Co U 3 C O c 0 U 0) p L 0 -D CO CO 7 0 c0 >, 0 0. > a7 U -a a) o a) O fcfpp U U c() Co 0 a L N 7 0 N N C p) E N U 07 N E (n N a) N E U = 0 0 7 p -0 7 _ N U Q. Ch 0 CO a) C 7 0 a) d — O Co 2 • I Z C U Co — 0 ` i- a) L N 0 Co > N L 0 N n m L° 00 a) O N (I) E 0 0 0 N O E N n-o N 0 y a) C (") n N 7 U Z L... r ._. as a • > c m - y CO E m L m a) C� o L Z m a Z o ° L E 7 3 N wp a) E O n C d N N 0 `) Z O N V) -p p N IE co N 7 Q 3 a) 'n aNi E O .w w m e 7 0 o L 3 N m 1 0 Co Co CO d L-. CO L CO 0 o c ci U) a U To— a) m co a) co a) �y N 3 (U N O c0 - 0 - N a 7 E • E C a) U 01 d N > Q o m c p c • 7 3 U @ .v p 6 L c m o CO d a) LL a) 0 O N O C N a) C .0 a) 3 7 CO L E co a) CO L a7 L O a) n• a. "O .O a) N E O O C CO n 0 m E L - E.Z C O CO a) • ~' L 7 CO U p Co _° a) V O Co N L N >, CL E c a) � o m 0 mL a) cn � .o no -0 -0 o a) ° a) 2 o co QC U a7 L U 0 CO L tr,C Co E �a O m > .0 Z .0 N a ° m O N .. co m 0 N 0 a) G n m a) E a) n m N_ c CO -o -a co co E C .0 .0 >, 0 5L a" 0 a) E O 0) T7 >, O D L "� C n a) T to 0 U @ N O as O '6 c0 O co O C (a ~ p T a) co• (n a) y 3 7 C• U C Q 0 Co n Co 'N- ) 0 N C 8 0 E E C C 7 0 T C 0 O -0 0 CS o, m a) U) m a) o o c 2 ° a) aa) .0 o m Z ¢ n •m m _ L m L' 7 N ` E .L... N N U (n -p N U c N • d 0 f f) N E ,- N �p n 0 a CO 7 aU) N N co 7 L 8p d.� 0 U U) > — — @ a _ 0 E co E L CO N C .N N '0 a) U) 0 0 0 a) O N . L 0 O 7 O a7 o L p H 3 w E n N a E U) O n 5 ¢ U H ' co In to o 0 c H c.) .E o L. 0 a a) 1 ,l w U L 7 0 r : a) �I0/, a v/ U) CO C 3 c T C _ C co Q o I O O a) U co L P. in a CA 0 T C S N D O U U) a 0 0 J N V. N O O .0 ¢ (n a m E La o ef cc a C v) y- U Co CO N a:' O_ a) Co 1 a O a) .....,.a' C a cu y Q) C fa Q) N a) U d N N > O N � U) O C c 0 2 n ¢ A A t a d o 0 Z l` a c to L1J J N C O 00. i C 0 o a c o m N 6 c ° a a a, N a a E 4 N �. ... C y) N (0 - j Co a D C C C E d d 3 10 O 3j `O _a _ 0 n 0 O a) N CO O a' U O O w O a m L a O - a a 0. m a 0 0 p. o 0 �., U) Q O T L O a C , a T N O—U O 2 N a >N 0> D o ` co U a) t D j y 0 D A E, ¢ V) N U) 'o m 0 U U 0 0 J J 2 2 2 a K co U) N U) (7 co d a C 1 p a J ® o X • 0 --e -1 $( 0 0 > + . . $ o 4.. le.y Q m• o u a- .1 1 Custom Soil Resource Report rdi Map Unit Legend Duval County,Florida(FLO31) Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI do 32 'Leon fine sand,0 to 2 percent 1.6 87.7%' slopes 69 Urban land 0.2 12.3% Totals for Area of Interest 1.9 100.0% lb Map Unit Descriptions • ' The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils.On the landscape, • however, the soils are natural phenomena, and they have the characteristic variability . ! of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic iii classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. ' Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties • and behavioral characteristics divergent enough to affect use or to require different management.These are called contrasting,or dissimilar,components.They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified t°I by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments .4 i on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. AI I 10 1 1 � Appendix E � FEMA Map I � I � p ^ 'D LI L = ° W Q O aci o a O m ° a) m -it < N oc r Q } 3 c o p Q 0 ° = U LU M c �L g wg 8 v 0. � Z ' > W ao LLI 4 ›^ to z a. g 8 0 cow a N 0 D as 0 LL Z E P c o s r- w —) 0 D o LV C w ° LL C n Z m 0 0 J V z I i 8 g a d N .Q. LLI et Li- _p Z Z - V � O Z 3 ) C LL o a o IL... d rO� X F 3 E c eD V V ° z G) Z - Hof u y a� i z a °ax g ? � w Hilt ��y. Um n K • liN a_ Q _ v - - v _ - - =- - - = = v - _- - v I - o Lei i 1 i b in N \ -.4t _J y 1111111■■ — 0 _7...1h, if :1.., ,..,.... ...,..„2„..... ,0001: m fi. .1 I IL '---,-•—4meem ,.. W CO CO CO CD Zt al oCO o Co N , CD < ,- / 0 A ...1110 el. co 0, \ fi /1 f: # 4. 0 •R- 0 I I II i II �r�, C • �.;, ii 9 6. ,� ■ ICI 1 r� ,)d-, ,..pt c.c. % ) �!. 0 0 0 ��!1 CV 1 2 , o cA Vb. 1P CD 70.40.1., irolii; ..:-. 11111167* 1 p+�#I N z r ' v.. 10�.. 3Nt/1 SV11IA JlVM211) . zomli ILI)" N. 4hki: . c W W w 00 N z W ce Z � F- 0 = 0 � Appendix F � Stormwater Calculations i 1 1 1 1 1 1 ' 1 1 ' 1 i I I I \ I > a \ 0 z $ \ 2 ° 3 I § q § o o ' ' \ \ § w « 0 I ) e S w \ e ƒ w o I O g , S.-. CO 2 0 § IL L J 0 0 I V D. 0 / as o S o k w v ; % % ce m , , CO CO 7 w / < ,- 0 L __,1 0 D } I 0 . _ . . , ƒ LLI / w a 0 0 0 C 2I � � % S. / _ \ ) w § _ a a « 0 § \ ) _ a rt 3 § C./) / % 5 _ ® E « _ m \ / 2 ƒ k / 7 @ \ I cc - w < o \ \ 0 4 0 0 \ . . ai / 2 ) co c @ / < = 5 « I- w } 13 Ce Ce 2c5) 2 a) 0 1 : m v. y w < 0 0 - ƒ \ ° w 2 g k � / \ / . o w / / j \ ƒ C o ƒ 0 \ \ Lu E_ w 2 e o x@ o« o O o 0 @ a. e I- 1- k E 0 0 \ \ w w z < 0 a < 7 -1 2 Iz .. c 0- 0- Li k \ 1 1 Date: 11/3/2014 1 i H 0 M AS Project: Dollar Tree - Mayport Road 4 E c s R , N G R O u F Project No: FT140062 4950 W Kennedy Blvd, Suite 600, Tampa, FL 33609 Tel: 813-379-4100 Calculated By: FLJ • Fax: 813-379-4040 Checked By: CTB IWATER QUALITY REQUIREMENTS City of Atlantic Beach Criteria: Treatment Volume per City Code I 1111 0.5" of runoff: Project Area 1.68 acres Total WQ Vol. 3049 cf I ISJRWMD Criteria: On-line Treatment Volume Calculation 1.0" over treatment area: I 1 Project Area 1.68 acres I I Total WQ Vol. 6098 cf 0.5" over treatment area + 1.25" over impervious area: I IProject Area 1.68 acres Impervious Area 1.07 acres Total WQ Vol. 7897 cf • I Greater of the two criteria: I 1 Total WQ Vol. 7897 cf Site discharges to OFW: 1.5x required treatment volume: 1 Required WQ Vol. 11,846 cf Provided WQ Vol 11,846 cf WQ Elevation 11.51 ft INote: SJRWMD treatment criteria will govern. I • 1 1 1 1HOMASProject: Dollar Tree-Mayport Road N G I N c [ a i N c c w o u r Project No: FT140062 4950 W Kennedy Blvd,Suite 600,Tampa, FL 33609 Tel: 813-379-4100 Calculated By: FLJ Fax: 813-379-4040 Checked By: CTB MODIFIED RATIONAL METHOD-25 YR RETURN PERIOD The Modified Rational Method estimates the attenuation volume needed to limit the rate of discharge from a developed site to the peak rate of runoff from the existing site using the rational method: Q=c'i*a,where Q= rate of runoff(cfs) c= runoff coefficient i= rainfall intensity(in/hr) a = contributing area(ac) The rainfall intensity term is related to the time of concentration for the site, as indicated in the FDOT Drainage Manual "Intensity-Duration-Frequency Curves for Zone 4". EXISTING CONDITION-Previously Permitted Contributing Area= 1.86 ac Existing Peak Rate of Runoff= 2.53 cfs Per SJRWMD Permit 37016-1 PROPOSED CONDITION-25 Year RETURN PERIOD Runoff Coefficient= 0.63 Contributing Area= 1.86 ac DURATION INTENSITY PROPOSED PROPOSED EXISTING ATTENUATION RUNOFF RUNOFF RUNOFF VOLUME RATE VOLUME VOLUME (min) (sec) (in/hr) (cfs) (cu ft) (cu ft) (cu ft) (ac-ft) 8 480 8.39 9.84 4723 1214 3509 0.081 10 600 7.83 9.18 5509 1518 3991 0.092 15 900 6.80 7.97 7177 2277 4900 0.112 20 1200 6.07 7.12 8549 3036 5513 0.127 25 1500 5.52 6.48 9713 3795 5918 0.136 30 1800 5.08 5.96 10719 4554 6165 0.142 35 2100 4.71 5.52 11601 5313 6288 0.144 40 2400 4.40 5.16 12382 6072 6310 0.145 45 2700 4.13 4.84 13078 6831 6247 0.143 50 3000 3.89 4.57 13703 7590 6113 0.140 60 3600 3.50 4.10 14777 9108 5669 0.130 75 4500 3.04 3.57 16052 11385 4667 0.107 1 90 5400 2.69 3.15 17031 13662 3369 0.077 120 7200 2.18 2.56 18406 18216 190 0.004 180 10800 1.57 1.84 19912 27324 -7412 -0.170 1 240 14400 1.30 1.53 21963 36432 -14469 -0.332 300 18000 1.02 1.20 21575 45540 -23965 -0.550 360 21600 0.89 1.05 22591 54648 -32057 -0.736 k 480 28800 0.76 0.90 25823 72864 -47041 -1.080 600 36000 0.74 0.86 31084 91080 59996 -1.377 900 54000 0.86 1.00 54181 136620 -82439 -1.893 I 1200 72000 1.08 1.27 91542 182160 -90618 -2.080 1440 86400 1.29 1.52 131225 218592 -87367 -2.006 I PROJECT: Dollar Tree - Atlantic Beach 11/20/14 PROJECT No: FT140062 FILENAME: G:\20141FT140062 - Dollar Tree - Mayport Rd. - Atlantic Beach\Project Documents\[ CALCULATION OF CULVERT CAPACITY USING MANNING'S EQUATION FOR OUTLET PIPE The capacity of the pipe proposed to be installed between the outfall control structure and the existing inlet may be determined using the following equations. The water level in the pond is assumed to be at the 25-yr design high elevation. The water level in the existing inlet is assumed to be at the grate elevation. v = (1.486/n) * R^(213) * S^(1/2) Q = v * A R = A /WP A = (1/4)pi * d^2 v = flow velocity (cfs) A = flow area (sf) n = Manning's roughness coefficient WP = wetted perimeter (ft) R = hydraulic radius (ft) Q = flow rate (cfs) S = slope of hydraulic grade line (ft/ft) pi = 3.141593 d = pipe diameter (ft) PIPE DIAMETER (in) 10 MANNING'S ROUGHNESS 0.013 COEFFICIENT UPSTREAM STAGE (ft NGVD) 12.24 DOWNSTREAM STAGE (ft NGVD) 11.47 ' LENGTH OF CULVERT (ft) 24 ISLOPE OF (ft/ft) 0.0321 HYDRAULIC I GRADE LINE % 3.21% CROSS SECTIONAL (sf) 0.55 AREA WETTED PERIMETER (ft) 2.62 1 HYDRAULIC RADIUS (ft) 0.21 FLOW VELOCITY (ft/sec) 7.20 I TOTAL FLOW (cfs) 3.92 RATE I Date: 11/3/2014 r ill H 0 M A Dollar Tree Project: Mayport Road N G I N C C R , N G G R O U P Project No: FT140062 4950 W Kennedy Blvd,Suite 600,Tampa, FL 33609 Tel: 813-379-4100 Calculated By: FLJ Fax:813-379-4040 Checked By: CTB Stage-Storage Calculations PROPOSED POND VOLUME Elevation Area Area Incremental Cumulative Volume Volume I `ft NGVD) (sq ft) (acres) (ac-ft) (ac-ft) 9.50 3734 0.086 0.000 11.00 6756 0.155 0.181 0.181 12.00 8923 0.205 0.180 0.361 I13.00 11193 0.257 0.231 0.591 WATER I QUALITY (ac-ft) 0.272 VOLUME (cu ft) 11846 WATER I QUALITY (ft) 11.51 ELEVATION WATER I ATTENUATION (ac ft) 0.145 VOLUME (cu-ft) 6310 WATER ATTENUATION (ac-ft) 0.417 VOLUME (cu-ft) 18155 DHW (ft) 12.24 1 ELEVATION _ Per Section 24-66.(b)of the City of Atlantic Beach, the pond must hold at least the increase in runoff from 9.3 inches of rainfall according to the formual below. This must be stored more than 1 foot above the seasonal high water table elevation 1 V,„,n = C`A*R/12 where: Vm = volume of storage in square feet A= area of lot in square feet I I R = 9.3 inches of rain fall (25-yr/24hr storm ) delta C = runoff coefficient(post minus pre) City Minimum Volume: 9902 CF II 0.23 AF II I I I PROPOSED OUTFALL WEIR CALCULATIONS Project Name: Dollar Tree - Mayport Road Project number: FT140062 Date: G:\2014\FT140062 - Dollar Tree - Mayport Rd. - Atlantic Beach\Project Docume 1 The weir crest can be sized using the equation Q = C x L x (H15) where Q = flow rate (cfs) = 2.53 cfs c , weir coefficient = 3.13 H = depth of flow over weir (ft) = 0.74 ft. L = weir length (ft) 0 = CxLx (H^1.5) 2.53 = 3.13xLx ( 0.00 1'1 .5 ) L = 1.28 ft 1 1 1 1 . 1 . 1 1 I 1 1 � Appendix G � PONDS IPONDS Underdrain Analysis Version 3.3.0050 Copyright 2008 I Devo Seereeram, Ph.D., P.E. 1 Job Information Job Name: Dollar Tree Mayport Road Engineer: Craig Boisseau, P.E. Date: 10-31-2014 Input Data rArea at top of pond, [ATOP]: 11193 ft2 Depth of basin, [d]: 3.5 ft Aquifer depth below pond bottom, [B]: 8 ft Desired depth to water table below pond bottom, [R]: 5 ft Perc rate per 4 in Hydraulic conductivity of soil, [K]: 12 ft/day SJRWMD Drain diameter, [D]: Thickness of gravel envelope, [t]: 6 in permit 37016-1 I Thickness of soil cover, [H]: 2 ft Treatment volume, [PAV]: 11846 ft3 Recovery time, [T]: 3 days Factor of safety, [FS]: 2 1 I Background seepage, [qb]: 0 gpm Vertical separation between pond bottom and tailwater. [TW]: 2.5 ft Manning's n value for lateral drain pipe, [n1]: .015 Manning's n value for main drain pipe, [n2]: .015 Slope of lateral drains, [s1]: .3 % II Slope of main drains, [s1]: .3 Maximum length of single lateral drain, [I]: 200 ft Maximum percentage of length of laterals connected to the main drain, [P]: 2 % a r Results 4 Computed underdrain spacing, [S]: 42.0572 ft I I Computed total length of laterals, [L]: 266.1376 ft Computed flow rate through outfall, [O]: 9.140432E-02 ft3/sec Computed flow rate per lineal foot of lateral, [ql]: 3.434476E-04 ft3/sec/ft I I Cumulative flow rate for the longest lateral, [qc]: 6.868953E 02 ft3/sec Minimum theoretical diameter for longest lateral, [DI]: 3.614908 in Minimum theoretical diameter for main pipe. [Dm]: 0.9279234 in 1 I I 1 Dollar Tree Mayport Road 11-03-2014 16:51:36 Page 1 I PONDS Underdrain Analysis Version 3.3.0050 I Copyright 2008 Devo Seereeram, Ph.D., P.E. Notes 1. Laterals should be no farther than S/2 from the top of the basin. A I 2. A gravel envelope at least 3 inches thick is recommended around the underdrain pipes. If a gravel envelope is used, a filter fabric will be required around this envelope. 3. The underdrain pipe should have a filter fabric sock to prevent fines from moving into and clogging the perforated pipe. 4. Ensure outfall elevation for system will allow gravity flow without tailwater backpressure to the underdrains. 5. Theory is applicable where ground water flow is largely in a horizontal direction (i.e., natural gradients less than 1%). 6. Capped and sealed inspection and cleanout ports which extend to the ground surface are recommended at the following locations for each drain pipe: a. the terminus b. at every 400 feet or every bend of 45 or more degrees, whichever is shortest 7. Underdrain basin should be stabilized with permanent vegetative cover. IWarnings None. : I • I 1 • 1 I I I I Dollar Tree Mayport Road 11-03-2014 16:51:37 Page 2 I � Appendix H � Operation and Maintenance � Guidelines 1 � 1 OPERATION AND MAINTENANCE GUIDELINES Stormwater Management Systems should be inspected on a routine basis to ensure that they are functioning properly. Inspections should be performed on a monthly and semi-annual basis following major storms. Systems that incorporate percolation are most critical since poor maintenance practices can soon render them ineffective. Records should be kept on all maintenance operations to help plan future work and identify facilities requiring attention. Considerable damage, as well as loss of structures and effective use of the stormwater facilities can result from a failure to protect and maintain the drainage systems. Providing maintenance in a timely manner often saves costly repair jobs when the unusual storms occur. Remember, the surface water management permit dictates that the system must be maintained and that the owner is responsible for system maintenance. ' GENERAL Normal maintenance requirements are as follows: ' a. Retention areas and swales should be mowed at regular intervals. All clippings should be picked up and any accumulated debris ' should be removed. b. Sod should be routinely thatched. c. The bottom area of dry basins should be periodically broken with a ' disk to maintain design percolation rate. d. Sod cover on slopes and embankments should be inspected and repaired or replaced as necessary. e. Periodically, following a storm event. the outfall structure should be inspected to check that the orifice or weir is not clogged and is ' flowing at a substantial rate. f. The discharge pipe(s) should be visually inspected to determine if the pipe(s) require cleaning. All debris found in the pipe should be removed. g. Inlet structures should be inspected after each storm. All debris accumulated in the sump or on the grate should be removed. h. Outlets should be inspected for clogging and erosion. Berms and other structures should be inspected for breaks. ' Repairs, if necessary, should be performed immediately. I i Appendix I 1 SJRWMD ERP # 42-031-37016-1 I I I I I I I I I I I I 1 • I A 40 1 A 0 __ — _______H to,¢1 , Te1JTI0N ) eot si2 6D1JG• M ITE,MP N N D hE GT IGt } qi _Tj I \{!4-.OL +I Q1! n. X � ,I 0 0 CD 1 — ■ _______________ --N-----.. c 114-,22 .i—{ ___ \I I+, "L i - (4,1-7 i \ 1 4.. f I -tit 1 ST'.JOMNS^AIV,tA •111. 4111 Henry Dean,Executive Director I -�"� WATER Mildred G.Horton,Assistant Executive Director 1jI!VIANAGEIVIENT' '"' • y U WATER John R.Wehle,Assistant Executive Director DISTRICT POST OFFICE BOX 1429•PALATKA, FLORIDA 32078-1429 904/328-8321 I ❑2133 N.Wickham Rd. ❑7775 Baymeadows Way 0618 E.South St. Melbourne,FL 32935-8109 Suite 201 Orlando,FL 32801 (407)254-1761 Jacksonville,FL 32256 (407)894-5423 li (904)730-6270 i:'tli-:J,L'i'. Mt7.:.:.? t..:! "'fit .•. . •Jt'4 y .T TN: , ti.. ,E ...L..Ui7 a::: r.e r rt; '6 - 4._- t._ .•-10?1;. - I 1-r;c :*.a eo• ts your szormwater perm; t as aL. " a r ! Z C l by 'uric Lt4f if tits_ - ,.. .JC't' i5: r ve ' Net' t,:_n-' ��et or:t L't '.. ;ricL on .)Ev:C:71r`t3 . r } . ' . . tnis p6rini u . 1s 'a iL"s: • :;,rocurrtertw ai10 srouic t:te ,•.wiit • • IF't ;rt your otrter :mpo:^ti.r:t ac'Curi?ar.ts. The atva cr:Lc :.:.o p I t t on (eport spoutC c• F :.: : ed in ar:c r r irrtc1 to trsc . a t a Ka. t::''; I C e - - Ji vi-..t .rt: tr; Irty •.da.yS; . aitc:r rpe w'ori: is coii;p : erec. :::i • so ',1o : na, you Jt t i erttic : e us to sc.riecu' :-C aL proMp+r t rl pecc t t _n of tn:C p.crrii : rea . licriviry. . . • — . in acci :, ; or; :,o t::e coJAp : ettori report , your permit atS,o I or:rains c C ric t L i :r;. 'wrl i C:. yrequire .'".uom:r_a of a r O a • o matt ;:ir; . At ) : rt:orril.: ' i::i-i Su.Lirt1tt•ccc a C'r : : ar.Cis t o ' v rt)iT_ !na : t i ori`_,ftu _. 0_Suim__tr _ _-r :-_... ;l::a.__o i CC a.ccrct:s . "errs t t : suar c rc coes not .-w i t c`:FSt you from tri1. r espor;s t rs• ! t y: a:• oCir irtir;j pe r •: ts from any reoa: .a . , stare , a c.'ot• : oca. t , L;3eitc t es asserrins concurrent Jur : se : et : on for tri t s '..°fir:. .• ' :n trte event .you :.e : : your property, r:te permit W : i t be t :rants , crrcc to rric new owner, : f we are not : . i cc by you WI tn: ; n ; I riei clays o ri v l _ tri r;ia�r:er s a . y y rile Gee . r• tc;.,C Zs .,�, 113 tr; : s � , r; ra- ) ri i r; vatic F:e i^rt: ` for ni c new,::J r; r:a't:r t ri c r • : rani: you for your coczpe'rat t :tr; and if tit : D office car: be C+1' ' .. . ' Itny :'urtncr ass t.starice to you, r : ease co n::; • nC: . „b te to L O i4; t w. • I ! r';L': c : y y • .aiit-t t Se , . r:.emp 4 u: rec ,.ot . :t4: : t on of ec ?rds . IFIK: pb - JOHN L.MINTON KELLY R.SMITH,JR. SAUNDRA H.GRAY RALPH E.SIMMONS Chairman-Vero Beach Vice Chairman-Palatka Secretary-DeBary Treasure-Fernandina Beach :riCtiosat'eS' : r.ermit ,: ttri ornp . e7 ; ori ,.;'•1101-t JIM T.SWANN • THOMAS L.DURRANCE JOE E.HILL SAM L.SWETT ALICE J.WEINBERG Cocoa . Holly Hill Leesburg Jacksonville Longwood . . litstrtet t-e! u it rite I . 42-031—1{):=TN .• SEi�'TEiiiiEK 8, 1'r� L • PERMIT NO. DATE ISSUED ' A PERMIT AUTHORIZING: • • A S T ORMWATER SYSTEM 'CONSISTING OF A RETENTION POND TO SERVE HESS I . MART,, A 1 .86 ACHE PROJECT. . I • LOCATION: • • Sect•i on 08, Township 02 .South , Range 29 East Duval County . . I. • ISSUED TO: (owner) -y . I (owner)AMERADA HESS CORPORATION . • ATTN: PETE ELLIOTT • 1 HESS. PLAZA • IWUUDBi IDGE, NJ 0 096 • • • Permittee agrees to hold and save the St. Johns River Water Management District and its successors harmless from any and all • damages, claims, of liabilities which.may arise from permit issuance. Said application, including all plans and•specifications attached Ithereto,is by reference made a part hereof. This permit does not convey to permittee any property rights nor any rights or privileges other than those specified herein, nor • relieve the permittee from complying with any law, regulation or requirement affecting the rights of other bodies or agencies. I • All structures and works.installed by permittee hereunder shall remain the property of the permittee. • This Permit may be revoked, modified or transferred at any time pursuant to the appropriate provisions of Chapter 373, Florida Statutes: • . PERMIT IS CONDITIONED UPON: • See C:c�nd i t i ons on Attached. "Exih i bit A. • dated S.EPTEirISER 8, 190: 1. . 1 • _ • • • • . AUTHORIZED BY: St. ohns •River Water•Management District ' • .J • • • • . • • I • Department of Resource Management Governing Board • • 1 • By: 0---"XL-as---Iff"a4 B y, • • • (DiX;9t9C1.� (Assistant Secretary)• Lead End i nee 0 I . • • 1 . THE ISSUANCE OF THIS PERMIT DOES NOT RELIEVE THE APPLICANT OF THE RESPONSIBILITY TO OBTAIN ANY REQUIRED FLORIDA DEPARTMENT OF ENVIRONMENTAL REGULATION PERMITS. THOSE CONDITIONS AS AGREED UPON IN SECTION I I OF THE APPLICATION. 3. THIS PERMIT FOR C:ONSTRUC:TICON WILL EXPIRE FIVE YEARS FROM THE DATE OF ISSUANCE. 4. F'ERMITTEE MUST OBTAIN A GENERAL OR INDIVIDUAL PERMIT FROM THE ' DISTRICT FR I OR TO BEGINNING CONSTRUCTION OF SUBSEQUENT PHASES OR ANY OTHER WORE:. ASSOC:I ATED WITH THIS PROJECT NOT SPECIFICALLY AUTHORIZED BY THIS PERMIT. S. THE PROPOSED STORMWATER MANAGEMENT SYSTEM MUST BE CONSTRUCTED AS PER PLANS RECEIVED BY THE DISTRICT ON 8/1e,/38. IF G. ALL SWALE AND RETENTION BASIN SIDE SLOPES MUST BE SODDED OR SEEDED AND MULCHED WITHIN 30 DAYS FOLLOWING THEIR COMPLETION AND A SUBSTANTIAL VEGETATION COVER MUST BE ESTABLISHED WITHIN r_.O DAYS ' OF SEEDING. 7. PERMANENT VEGETATIVE COVER MUST BE ESTABLISHED UN ALL EXPOSED LAND SURFACES WITHIN ONE YEAR FROM THE DATE OF THE CONSTRUCTION IS COMPLETE. 8. ALL STORMWATER TREATMENT FACILITIES AND ASSOCIATED CONTROL STRUCTURES MUST LE CONSTRUCTED PRIOR TO ANY STRUCTURAL BUILDING CONSTRUCTION OR PLACEMENT OF ANY PAVEMENT. ADEQUATE MEASURES MUST BE TAKEN DURING CONSTRUCTION TO PREVENT SILTATION OF THESE TREATMENT FACILITIES AND CONTROL STRUCTURES DURING CONSTRUCTION. I! 9. THE ISSUANCE OF THIS PERMIT DOES NOT RELIEVE THE APPLICANT OF THE RESPONSIBILITY TO OBTAIN ANY AND ALL OTHER REQUIRED LOCAL, STATE. AND FEDERAL PERMITS. 10. THE PERMITTEE MUST REQUIRE THE CONTRACTOR TO REVIEW AND TO MAINTAIN IN GOOD CONDITION AT THE C:ONSTRUC:TION SITE A COPY OF THIS PERMIT COMPLETE WITH ALL CONDITIONS, ATTACHMENTS, EXHIBITS, AND PERMIT MODIFICATIONS ISSUED FOR THIS PERMIT . THE COMPLETE PERMIT COPY MUST BE AVAILABLE FOR REVIEW UPON REQUEST BY DISTRICT REPRESENTATIVES. 11 . TURBIDITY BARRIERS MUST EE INSTALLED AT ALL LOCATIONS WHERE THE POSSIBILITY OF TRANSFERRING SUSPENDED SOLIDS INTO THE '. RECEIVING WATEREODY EXISTS DUE TO THE PROPOSED WORK. TURBIDITY BARRIERS MUST REMAIN IN PLACE AT ALL LOCATIONS ' UNTIL CONSTRUCTION IS COMPLETED AND SOILS ARE STABILIZED AND VEGETATION HAS BEEN ESTABLISHED. THEREAFTER THE TERM I TTEE WILL BE RESPONSIBLE FOR THE REMOVAL OF THE BARRIERS. II. 12. WITHIN THIRTY (30) DAYS AFTER SALE OR CONVEYANCE OF THE PERMITTED SURFACE WATER MANAGEMENT SYSTEM OR THE LAND ON ' WHICH THE SYSTEM IS LOCATED, THE OWNER IN WHOSE NAME THE PERMIT WAS GRANTED SHALL NOTIFY THE DISTRICT OF SUCH CHANGE OF OWNERSHIP. TRANSFER OF THIS PERMIT SHALL BE IN ACCORDANCE WITH THE PROVISIONS OF CHAPTER 373, FLORIDA STATUTUES, AND ' CHAPTERS 40C:-4, 40C-40, AND 40C-41 , FLORIDA ADMINISTRATIVE CODE. ALL TERMS AND CONDITIONS OF THIS PERMIT SHALL BE BINDING UPON THE TRANSFEREE. receipt of notice of the District's intent to grant or deny a permit application by mailing it to the District or by presenting the written petition at the District Governing Board meeting in which action is proposed to be taken regarding the application, whichever is later. di 2. A party whose substantial interests are determined has the right to request an administrative hearing by filing a written petition within 21 days of receipt of notice of final District action on a permit application, al if the Governing Board took action inconsistent with the notice of intent to grant or deny the permit application, or if that substantially interested party did not receive notice of the District's intent to grant or deny the permit Iapplication. 3. A substantially interested party has the right to a formal administrative hearing pursuant to Section I 120.57(1),Florida Statutes,where there is a dispute between the District and the party regarding an issue of material fact. A petition for a formal hearing must comply with the requirements set forth in Section 28-5.201, Florida • Administrative Code, and Section 40C-1.11, Florida Administrative Code. I 4. A substantially interested party has the right to an informal hearing pursuant to Section 120.57(2),Florida Statutes, where no material facts are in dispute. A petition for an informal hearing must comply with the requirements set forth in Section 40C-1.11, Florida Administrative Code. I5. Filing of a petition for an administrative hearing occurs upon delivery at the District headquarters or when the petition, properly addressed and stamped, is postmarked. I6. Failure to file a petition for an administrative hearing within the requisite time frame shall constitute • a waiver of the right to an administrative hearing. I 7. The right to an administrative hearing and the relevant procedures to be followed are governed by Chapter 120, Florida Statutes, and Chapters 40C-1 and 28-5, Florida Administrative Code. 8. Any substantially affected person who claims that final action of the District constitutes an unconstitutional I taking of property without just compensation may seek review of the action in circuit court pursuant to Section 373.617, Florida Statutes, and the Florida Rules of Civil Procedures, by filing an action within 90 days of the rendering of the final District action. di 9. Pursuant to Section 120.68, Florida Statutes, a party who is adversely affected by final District action may seek review of the action in the district court of appeal by filing a notice of appeal pursuant to Fla.R.App.P. I9.110 within 30 days of the rendering of the final District action. 10. A party to the proceeding who claims that a District order is inconsistent with the provisions and purposes I of Chapter 373, Florida Statutes, may seek review of the order pursuant to Section 373.114, Florida Statutes, by the Land and Water Adjudicatory Commission(Commission)by filing a request for review with the Commission and serving a copy on the Department of Environmental Regulation and any person named in the order within 20 days of the rendering of the District order. However, if the order to be reviewed is determined by the Commission I within 60 days after receipt of the request for review to be of statewide or regional significance, the Commission may accept a request for review within 30 days of the rendering of the order. I 11. A District action or order is considered "rendered" after it is signed by the Chairman of the Governing Board on behalf of the District and is filed by the District Clerk. 12. Failure to observe the relevant time frames for filing a petition for judicial review as described in paragraphs I #8 and #9 or for Commission review as described in paragraph #10 will result in waiver of that right to review. I • CERTIFICATE OF SERVICE I HEREBY CERTIFY that a copy of the foregoing Notice of Rights has been furnished by U.S. Mail to I AMERADA HESS CORPORATION 1 HESS PLAZA WOODBRIDGE, NJ 07095• t at 4:00P,M. this day of SEPTEMBER , 19 2, . .. n - . � _ ,