The URL can be used to link to this page

Home My WebLink About2009 03 23 Informational 102 Solary Canal Stormwater Treatment AreaCOMMISSION AGENDA ITEM 102 March 23, 2009 Meeting Consent _ Information X Public Hearin Re ular MG /DEPT ~/ REQUEST: The Public Works Department is providing the City Commission an update on the Solary Canal Stormwater Treatment Area, located on the west side of DeLeon Street in the City of Winter Springs. PURPOSE: To update the City Commission on the status of the Solary Canal Stormwater Treatment Area project SOLARY CANAL PROJECT BACKGROUND: • The City Commission approved the Final Engineering for the St. Johns River Water Management District's (SJRWMD) Solary Canal Stormwater Treatment Area at the September 22, 2008 Commission meeting. The rezoning to RC-1 and conditional use for a public service facility was approved by the Commission at the October 13, 2008 meeting. No construction work has started on the project to date. • The proposed Solary Canal Stormwater Treatment Area is on a 28.9-acre SJRWMD-owned property located at 1900 DeLeon Street in the northeast corner of the City of Winter Springs (see map and site plan attached). • The purpose of the Solary Canal Stormwater Treatment Area is to improve the water quality of Solary Canal prior to its discharge into Lake Jesup. Solary Canal is an existing regional drainage channel located primarily within the City of Oviedo with the exception of the northern-most portion of the canal adjacent to Lake Jesup, which is in the City of Winter Springs. The proposed Stormwater Treatment Area has a contributing drainage area upstream of the property of approximately 1,471 acres. Solary Canal is estimated to discharge more than 2,000 pounds of phosphorous into Lake Jesup every year. The proposed Stormwater Treatment Area would reduce this phosphorous discharge by an estimated 942 pounds per year. • The Stormwater Treatment Area is an off-line system comprised of a manmade wet pond and wetland connected in series. All of the canal normal base flow and a large fraction of the storm flow is diverted into an 8-acre wet pond. Flow from the wet pond discharges into a March 23, 2009 Informational Agenda Item #102 Page 2 of 4 4.8-acre wetland through a control structure and overflow weir. Flow from the wetland discharges through a second control structure and overflow weir back into the canal near the north property line. High storm flows are allowed to bypass the pond over a diversion weir and continue through Solary Canal. Pollutant loads in the canal's base flow and storm flow are first reduced in the wet pond and then reduced further (for most parameters) in the wetland. In addition, the wet pond and wetland system provide over 67 acre-feet of storage. CITY OBLIGATIONS FOR REDUCED PHOSPHOROUS DISCHARGE TO LAKE JESUP FROM STORMWATER RUNOFF: • Lake Jesup has been verified by the Florida Department of Environmental Protection (FDEP) as impaired for nutrients and unionized ammonia due to elevated annual average Trophic State Index (TSI) values and exceedances of the unionized ammonia criterion. FDEP formally adopted a Total Maximum Daily Load (TMDL) report for Lake Jesup in April 2006. The TMDL report identified the nutrient loading sources and required reductions to meet water quality standards for total phosphorous (TP) and total nitrogen (TN) within the Lake Jesup Basin. • Under the Lake Jesup Basin Management Action Plan (BMAP), entities within the Lake Jesup Basin including the City of Winter Springs will be required by the Florida Department of Environmental Protection to reduce phosphorous discharges to Lake Jesup from surface waters and/or septic systems by a combined total of approximately 20,000 pounds over the next 15 years. The City of Winter Springs will be required to reduce its phosphorous discharge by 755 pounds over the next 15 years under the current BMAP, which is in its final development stages but has not been formally adopted. REGIONAL PARTNERSHIP PLAN FOR SOLARY CANAL PROJECT IMPLEMENTATION: • The Solary Canal project offers a major opportunity for the City and other agencies to make significant progress towards meeting their Lake Jesup phosphorous reduction obligations at a feasible cost. With this in mind, Staff has conducted preliminary discussions with the City of Oviedo, Seminole County, and the St. Johns River Water Management District to discuss project partnership opportunities. Based on these discussions a working framework for a potential regional partnership has been identified as follows: o The project will be advertised for construction bids in Apri12009 o SJRWMD has approximately $2.0 million available for construction. The engineer's estimated construction cost is approximately $2.4 million; however, in the current construction market it is anticipated that the construction cost could come in at or below $2.0 million. SJRWMD would fund the construction up to approximately $2.0 million, and the City of Winter Springs, City of Oviedo, and Seminole County would share in any construction costs exceeding the amount available from SJRWMD. The participating agencies would have the option to opt out of the project before committing any funding. 2 March 23, 2009 Informational Agenda Item #102 Page 3 of 4 o The City of Winter Springs, City of Oviedo, and Seminole County would form an Interlocal Agreement to equally share in the long-term annual maintenance costs for the facility, which is estimated at $60,000 per year, or $20,000 per agency. o The City of Winter Springs, City of Oviedo, and Seminole County would also equally share in the phosphorous reduction credit of 942 pounds per year overall, or 314 pounds per year per agency. o Since the project is in the City of Winter Springs, SJRWMD would transfer ownership of the property to the City of Winter Springs. All expenses involved with owning and maintaining the property and the Stormwater Treatment Area would be shared equally between the three project partners. CITY'S LAKE JESUP TMDL MASTER PLAN: At the January 14, 2008 City Commission meeting, the Commission provided authorization to enter into a contractual agreement with Camp Dresser & McKee Inc. (CDM) to provide professional engineering services for the development of a Total Maximum Daily Load (TMDL) Master Plan. The purpose of the Total Maximum Daily Load (TMDL) Master Plan was to identify, price, and prioritize projects, activities, and policies that the City can implement in order to meet its TMDL obligations for Lake Jesup. The TMDL Master Plan was completed in March 2009 and it identified and evaluated nine (9) proposed stormwater treatment projects within the City. Staff has also identified additional activities available for TMDL credit, such as the City's participation in the Florida Yards & Neighborhoods program. Exhibit C shows an overall list of planned TMDL projects and activities that the City can implement over the next 15 years to meet its required reduction of 755.2 pounds of phosphorous per year. Exhibit C clearly shows that participation in the Solary Canal project, assuming 100% of the construction cost is funded by SJRWMD, is by far the best opportunity to obtain substantial TMDL reduction credits (314 pounds per year) at the lowest cost. TENTATIVE PROJECT IMPLEMENTATION SCHEDULE: • Advertise for construction Bids -March 29, 2009 • Bid Opening - Apri129, 2009 • Finalize Interlocal Agreement and submit for City Commission approval -May 2009 • Secure construction funding from SJRWMD -May 2009 • Award construction contract -June 2009 • Construction - July 2009 -February 2010 3 March 23, 2009 Informational Agenda Item # 102 Page 4 of 4 FUNDING: None RECOMMENDATION: N/A ATTACHMENTS: 1. Exhibit A -Project Location Map 2. Exhibit B -Site Plan 3. Exhibit C - TMDL Project List COMMISSION ACTION: 4 EXHIBIT A SOLARY CANAL PROJECT LOCATION MAP .. _ _.:~ ; _. _!- ~r,r.-_ , ,~ Project Site ~~ .. . - ~. , .: , ~ r ~ , ,~ . - _ ~ l6ia ~~ . IQN: . ' iR 1QI0 '. l7m 'iri ~~ f M~ ~ 1 17b : / IJ% ' ..JUT JJW M 0 170 340 680 1,020 1,360 Feet w t lF~i I t i 1 I I i 3 BREAK FV FENCE FaacANU t` \, ____ _ _ - _ _ _ _.._ _ ~4fi~ MK2i0 Pf (TY% a 4 I ~ 3 HIGH CHAw LINK FENCE wrBIADKwNncoATx1G 614' WIDE CANTILEVHt GATE - - - ~ - - - - - - - - - - - - - CANAL EROSKX1pROTECTIUN k COMPRI6ED OF SHEET PLE WALLS ANE7RPRAP TOP EL=10.751 BOTEL=&40 /•-------D\\ WETLAND . WATEREL=8.75 Tap a=12A0 i - BOTH=5.76705.00 - Il. 100-YR FP EL =122 ~. l A G1 J I WATER EL = 7.0 POLLUTANT REMOVALANO 3TORMWATER ROUTING CALCULATIONS. I TOP =14A ! BOT = 0.0 I I 100XR FP EL =13A I 2. THE CONTRACTOR SHALL FOLLOW THE SEQUENCE OF WORK 8 DEWATERING PLAN ON I DWG G2 MODIFICATIONS TOTHIS PUN SHALL ~ COORDNATED WITH PROJECT OWNER. I I ~ 3. PER TFff UTEST FEMA FFM MAP (12117C01BOF, Bf2g107~ THE 100•YEATi ZONEAE FLOODPLNN I I ELEVATpN3ARE CONTAINED WITHIN SOLARYCANALTHROUGHOUT THE ENTIRE SITE. I I IR THE gAhE FIRM MAP INCORRECTLY SHOWS THE BOUNDARY OF THE FLOODPLAIN I EXCEEDINGTHELD4TTSOFTHECANALADURIONALLY,TFEFEMAFLOODPUINBOUNDARY I I D ~ E 0 ~R ~ M ~ W O ~ ~ ~ I 0-YEAR 1 T }I 1 Y LSNOr DP NB U N OO FOR('A/WfTY,1H FLE TF6tffORE I FLOODPLAIN ISASSUNED TO FEMAIN WITHNI THE TOP OF BANKS OF THE CANAL 5 NIGH CH41N LINK I ~- BLACKVINYLFENCE I 4. SEE DWG C3 FOR WETLAND IMPACTS TO SOINtY CANALAND THREE SMALL ISIXATED I AT PROPERTY).NE ~ I DEPRESSKX4ALWETIANOS. I I I ' 5. FIEVATIONSANDFL04YSATKEYLOGITKfNSWfTFIINTHECANAI.ANDTREATMENfSYSTEMARE I INDICATED ON THIS PLANAND SHOWN IN TABLE 1. ASSHOWN, TFEPOSE-DEVELOPMENT I I I ELEVATK7NSANDFLOWBARELESSTWWUNDERPIE-0EVELOPMENTCONDRIONS. - - - - - - - - - - - - - - - - - - - ' - - - - - - - ' - - - - - - - - - - - - J 8. FOR BENCHMATO(AND COORDINATE INFORMATKJN SEE NOTES 3, 4 AND 5 UNDER SURVEY NOTES ON DWG G1. COORDINATES FOR EXISTING BENCHMARKSAND OTHER SITE MONUMENTSARE SHOWN ON SELECT PLAN 3HEET3AND THE SURVEYAT END OF SET. 7. PER THE CONTRACTOR BID lISTRUCTIONS, (3) THREE BHEET PILE RETAINING WALL5 FOR TREE PROTECTION ARE SPECIFlEDASALTERNATIVE BID ITEMS. CANTRACTOR TO COORDINATE WTTN OWNf]ZAS TO WHETHER THESE REG841NG WALLS WILL BE CONSTRUCTED. 2 lYF'E'H' DBI TOP EL =10.75 7D' SLOT EL=7A /5 LS CONTAINEDSNfT}BN CANAL SEE NOTE 3. 1 \ BREAK IN / 4 SLOPE i~ 10:1(68t+~ : ` ' FOR CANAL ~/15 ' TO NATURAL GRADE 25 BUFFERATTHIS O~ PROPERTY CORI4ER ONLY g~ (~TYP~ A v TBMffi ~ .~~ _,. I ~~ NE)iE e) NOTES I SHEET PILE TREE WALL N0.3 I 1. THE PROP09ED gTORMWATERTREATMENTAREA ~ DESIONEDTO PROVIDE POLLUTANT POfn (gff NOTE 7) I FIEMOVALAND FLOOD ATTENUATKNJ FOR SOLARYCANAL PRIOR TO DI8CHARGE MO LAID: I JESLIP.REFERTOTHEWAIEROUALRYANDSTORMWATERMANAGEMENTREPORTFOR " EXHIBIT B 0 D BO 120 180 1~ PROPEAf1'UNE 6 Q HIGH CHAIN LNK FENCE 40' MN 80' _, 8' LRORAL6SLOPE TOP PLANTINGS ~ a= u.o WATER EL=7A 1 _1~ 10 R 8 i, 1 i EL=4A I ' , "h eoTroM SECTION A PoNO CROSS•SEL'TION a=o.o G1 ~ pROPERTI'uNE aSHK;HCNaN LINK FENCE M~RO POOL 40' M11 ~ 40S , VARIES _, _ VAFOES J WATER EL=8.75 TOP EL=12S io n WETLAND ~~~ ~Yp) ~~ BOTTOM 12 ~ EL=5.75 BOTTOM SECTION B wEnANO CROSSSECTION G1 NTS TABLE 1-CANALANDTREATMB4f SYSTEM DESIGN FLOW6 EIEVATIONS EXISTING DESIGN NORANL PRE4)EVELOPMENT ppST47EVELOPMENT BASE FLOW 104YR, 24-HR 100•YR, 24+IR ELEV FLOW ELEV FLOW ELEV FLAW ID DESCRIPTION Fr-NGVO cFS Fr~GVO cFS FT~GVO cFs ~A SOUTH P.L 8.3 0.5 152 468 15.1 488 B POND ENTRANCE 72 0.8 13.8 468 134 488 C ppNDTOWETLAND - - - - 13.4 371 D WETLANDTOCANAL - - - 122 314 V BYpgggLypR 72 0.6 13.8 466 12.1 143 ~F NORTH P.L NORTH P.L 8.4 8.4 0.8 0.8 122 122 4B4 4B4 119 119 448 ELEVATIONS ARE BASED ON CURRENT INID USE CONmTTX)NS. FlLENAME: diA5w01 352723.d~ PLOT DALE: fYl?N008 W a _~ LL p O~ KY}t x Q Z Z5a LLC f a ~g o o ~ a QQ ~ e LL 0 O ~~fC ~ O d , ~ Q U << ~ ;~ ~ ^ D C F w~ZU~ ~ 0 Rp~ d ~ m 0 w -, m J _ ~g J a U ~ F H oN w VGTFY SCALE eweaxEwid+ }a( o•r o E SEPTEMBER 2008 U 978878 G1 Oc'f pLOT'IRB t133~2AM WETUNp OAfERFLOW WEIR ~ ~ RE01F CONC WtHZEL=8.75 ~ BQT WB)TH = 30' WEi1J4HD DRAWDONM STRUCTURE TYFf 11' DBI FD(7T INDEX Z32 TDPa,aTS \ sr sLOr a=ti,7s GANALCFLOSSNG r ~ 8' REINF OOHC DRNE (15 X 101 \ 6CONCBOXCULVERT I (5 H x 17 Wx 30L) , SEINVEL=TA ... \ NW INV EL = 8.9 SYSTEM NTAKE WfIH TBM t1 BYPASSWEFL ~ (SEE NOTE B) \ sHEEr4'ILE wu.L WI CONC CAP TTJP EL=15A ` ~ WEIREL=10.75 (( WEIR WIDTH=120 MAe4ro+ANCE oraYE a oEBRS SCREEN. ,.7 ~ 8' REINF CONC MAINFENANCE DRNE _ v (BOTroMa=Ta)TOa~ESs 7 \ " "~ U N K ~ ~ EI .-19 E N [f OP S CRE ~' \ RIPRAP (iYP) `\ 3HEETPILE TREE WALL NQ 1 (SEE NOTE T) SHEET PILE TREE WALL N0.2 (SEE NOTE n 100•YR FLOODPUIN EL \ EXHIBIT C TMDL PROJECT LIST Pro'ect Annual TP Removal (Ibs) Cumulative TP Removal Construction Cost Cost per pound of TP Removed Recommended Pro ects: Solary Canal 314.0 314.0 $0 $0 Local Codes and Ordinances (Fertilizer Rule, etc.) 34.5 348.5 $0 $0 Street Sweepin 7.3 355.8 $0 $0 Florida Yards & Neighborhoods 80.5 436.3 $3,000 $37 Winding Hollow Wetland Treatment Area 210.1 646.4 $357,000 $1,699 Winter Springs and Wedgewood Filtration Devices 24.7 671.1 $132,000 $5,344 North Orlando Townsite Filtration Devices 5.2 676.3 $80,000 $15,385 Hi hlands Pond Improvements 64.5 740.8 $1,385,000 $21,473 Total Reduction 740.8 $1,957,000 $2,642 Total TMDL TP Allocation throu h 2024 755.2 ltiorwa) Pnp acts; Oak Forest Filtration Devices 5.4 746.2 $194,000 $35,926 Tuscawilla CC Stormwater Reuse and Water Features 33.5 779.7 $1,466,000 $43,761 Winter Springs Blvd Pond Enhancements 1.5 781.2 $250,000 $166,667 Hacienda Village Stormwater Facility 3.5 784.7 $1,276,000 $364,571 Buttonwood Ave Stormwater Pond 9.4 794.1 $3,613,000 $384,362 Note: The City has an obligation to remove a total of 755.2 pounds of phosphorous over the next 15 years, broken down as follows: 2009-2014: 0.0 2015-2019: 241.3 2020-2024: 513.9