Index Number Greenland Burnt Mill PS to GEC Trans FM

Transcription

1 INDEX NUMBER GREENLAND BURNT MILL PS TO GEC TRANS - FM T E C H N I C A L M E M O R A N D U M Index Number Greenland Burnt Mill PS to GEC Trans FM PREPARED FOR: JEA CAPITAL BUDGET PLANNING PREPARED BY: WATER/WASTEWATER SYSTEMS PLANNING DATE: January 19, 2018 Susan R. West, P.E. Introduction This Technical Memorandum (TM) is prepared for a planned force main extension. Consistent with the Southeast WW Master Plan, a 24 force main is proposed to redirect flow from the Burnt Mill Master Pump Station (MPS) to the future Greenland Wastewater Treatment Facility (WWTF). The main will be extended along Burnt Mill Road and along a JEA electric transmission corridor. Upon completion, approximately 2 MGD ADF will be redirected from the Arlington East WWTF to the new Greenland WWTF. This TM identifies the preliminary route, itemizes potential design and construction considerations, provides a preliminary opinion of probable cost and includes a proposed project schedule. Justification & Project Description This project will redirect existing sewer flow from the Arlington East WWTF to the proposed Greenland WWTF. Arlington East WWTF is currently approaching the operational capacity of the current system and additional carbon feed will be needed to maintain the design total nitrogen reduction efficiency. Redirecting the Burnt Mill MPS will send an estimated 2 MGD to the new Greenland WWTF. It is proposed to install approximately 34,500 feet of 24 force main along Burnt Mill Road from the Burnt Mill MPS to the JEA electrical transmission easement south to the proposed Greenland WWTF. Included in the scope of this project is to evaluate the pipe line routing and to evaluate cost saving measures. Figures 1 and 2 provide overall maps of the area. Scope Capacity The force main sizing was based on the current flow to the Burnt Mill MPS (3600 PHF) plus the proposed flow from the future development parcels within the basin including the Skinner SE Quadrant (2040 gpm PHF). The current pump capacity of the Burnt Mill MPS is 8100 gpm. Therefore a 24 force main size was selected (3600 gpm PHF provides a velocity of 2.55 ft/s and the 8100 gpm pump capacity provides a velocity of 5.75 ft/s). Route & Alignment The objective of this project is to redirect the Burnt Mill MPS to the Greenland WWTF via a 24 force main. At the writing of this PD, the location of the Greenland WWTF has not been finalized but will be in the vicinity of the area shown on Figure 1. Final plant siting will be complete prior to commencement of the design effort. The proposed force main route follows Burnt Mill Road to the north/south electrical transmission easement just west of Gate Parkway. Following the transmission easement south, the force main will cross Baymeadows Road and I-295. Based on the aerial views, it appears wetlands will be encountered along the easement to the Greenland destination. PAGE 1 OF 6

2 INDEX NUMBER GREENLAND BURNT MILL PS TO GEC TRANS - FM Figure 1 Overall Force Main Route Greenland WWTF approximate location I-295 Transmission easement Proposed 34,500 LF 24 Force Main Figure 2 Aerial View of Force Main Route Greenland WWTF approximate location I-295 Transmission easement Proposed 34,500 LF 24 Force Main PAGE 2 OF 6

3 INDEX NUMBER GREENLAND BURNT MILL PS TO GEC TRANS - FM Design Considerations A potential cost saving measure exists by utilizing the existing 24 force main between the Burnt Mill MPS and the Reedy Branch MPS. Currently wastewater flow from the south is pumped north along the 24 force main to Burnt Mill. If the Burnt Mill MPS is repiped to reverse the flow to the existing 24 along Burnt Mill Road and then to the south, then a new 24 force main would only need to be added from the southern end of the existing 24 to the Greenland WWTF thus reducing the footage of 24 force main by 14,900 feet. Figure 3 provides a schematic of the optional routing scenario. Figure 3. Optional Routing Scenario Alternate pipe corridor (19,600 ft) Full pipe corridor (34,500 ft) This routing scenario would need to be evaluated to determine if the other pump stations connected to the existing 24 force main (including BUR-11201, BAY-7823, POI-7825, POI-8032, RGS-9174, BAY-8036, REE-8614) would need to be modified with the new operating conditions of the force main. The flow south of Reedy Branch MPS on the 12 force main would need to be connected to the gravity pipe discharging into the Reedy Branch MPS. (Currently this flow bypasses the Reedy Branch MPS and pumps directly on the 12 force main to the 24 force main. The flow redirection would require adjustments of existing valves.) Method of Construction The methods of installation for the proposed force main shall be by any means necessary in accordance with the latest edition of the JEA Water & Sewer Standards Manual and as allowed by the City of Jacksonville and other applicable governing agencies. The project engineer should determine the most economical pipe routing and installation methods while remaining consistent with the JEA standards and specifications. An equivalent pipe diameter of 24 PVC should be maintained when selecting pipe size and material. PAGE 3 OF 6

4 INDEX NUMBER GREENLAND BURNT MILL PS TO GEC TRANS - FM Special Crossings The installation route will require crossings of City of Jacksonville roadways and the I-295 corridor. Other JEA water, sewer and electric facilities are located along the proposed corridor. It is expected other utilities such as gas, phone, fiber optic and cable are also present in some locations. In areas of limited space, travel lane encroachment or temporary construction easements may be required. Land Ownership/Real Estate Issues It is anticipated the pipe installation will occur within public rights-of-way, JEA fee simple owned tracts and within JEA easements on private properties. The need for any temporary construction or permanent easements should be evaluated early in the design process to allow time for acquisition. All easements and right-of-way issues will be coordinated by the design team and addressed during the project design phase. JEA Real Estate has been engaged to confirm easement rights within the existing electrical transmission corridor. Survey Requirements Final design of the project should be based on field survey data including horizontal and vertical locations and identification of existing utilities, pavement, guardrail, structures, electrical power poles, mail boxes and drainage features within the project area limits. Right-of-way boundary limits, existing easements and parcel ownership lines should be included on the survey as well as any vegetation deemed protected by the governing jurisdictions including City of Jacksonville protected trees. Any wetland lines or significant habitat community limits should be flagged prior to survey commencement. Site Development Characteristics The project area includes work within public right-of-ways. The presence of environmentally sensitive wetlands within the project corridor should be evaluated. The presence of any listed species should be evaluated concurrently with the wetland line review. Limits of Flood Plain The project corridor crosses multiple flood plain areas per FEMA FIRM panels 556, 557, 559 and 567 for Duval County (see Figure 4). While work will likely occur within the 100 year flood plain, no additional permitting is anticipated as the finished grade of the work limits should be consistent with the original elevations. PAGE 4 OF 6

5 INDEX NUMBER GREENLAND BURNT MILL PS TO GEC TRANS - FM Figure 4. FEMA Flood Zone Site Overlay Proposed 24 FM Permit List It is anticipated that at a minimum permits will be required by the City of Jacksonville (10 set review and Right-of-Way permit), Florida Department of Environmental Protection, FDOT, St. Johns River Water Management District and the Army Corps of Engineers. The project corridor should be evaluated for the presence of jurisdictional wetlands, listed species and protected trees. The need for any associated permitting should be addressed during the design phase. Other permits may be determined necessary during the design process and will be obtained by the design team. PAGE 5 OF 6

6 INDEX NUMBER GREENLAND BURNT MILL PS TO GEC TRANS - FM Project Schedule Major activities are as follows: Engineer Selection June 2018 to October 2018 Survey, Design & Permitting November 2018 to September 2019 Procurement, Construction & Closeout October 2019 to January 2022 Project Management & Delivery Stage Project Definition 10% Schematic Design 30% Conceptua l Design 90% Detail Design 100% Final Design Bid Construction To Project Delivery WWSP PEC PEC PEC PEC PEC PEC OPB Established Trend Trend Trend Risks The purpose of this project is to redirect flow from the Arlington East WWTF to the Greenland WWTF. Failure to redirect this flow will result in costly upgrades to the Arlington East WWTF to maintain the current treatment efficiency of the plant. Revision History Name Date Version Revision Notes PAGE 6 OF 6

7 INDEX NUMBER TWMP US1 BPS OLD ST. AUGUSTINE RD TO US1 BPS - W T E C H N I C A L M E M O R A N D U M Index Number TWMP US1 BPS Old St. Augustine Rd to US1 BPS - W PREPARED FOR: JEA CAPITAL BUDGET PLANNING PREPARED BY: WATER/WASTEWATER SYSTEMS PLANNING DATE: January 30, 2018 Susan R. West, P.E. Introduction This Technical Memorandum (TM) is prepared for a planned water main extension. The proposed project was identified as part of the iwater study which is investigating JEAs future water supply needs (Project number DS01). Implementation of this project will deliver raw water from the Main Street WTP (North Grid) to the US1 Booster Pump Station (BPS) which serves the South Grid resulting in a direct offset of water withdrawal from the JEA South Grid wellfield of concern. This project will expand the hydraulic influence of the TWMP. Approximately 20,500 feet of 24 water main is planned to provide a connection from Old St. Augustine Road to the US 1 BPS. This TM identifies the preliminary route, itemizes potential design and construction considerations, provides a preliminary opinion of probable cost and includes a proposed project schedule. Justification & Project Description This project is part of the Total Water Management Plan (TWMP) for the South Water Grid and was identified as part of the iwater project (Project number DS01). This project increases the supply of water to the US 1 BPS which serves the St. Johns County area, which is an area experiencing high growth. The US 1 BPS is currently undergoing expansion to meet the expected growth demands. The existing 24 water main is not sufficient to meet the future area demand. In addition, this pipe will provide redundancy to the existing 24 water main. It is proposed to install approximately 20,500 feet of 24 water main from the Old St. Augustine Road to the US 1 Booster Pump Station. Scope Capacity The water main sizing is based on the recommendations of the iwater Project. Route & Alignment It is proposed to install approximately 20,500 feet of 24" water main from the 24 water main stub-out to the north west of the Philips Hwy/Judith Avenue intersection to the US 1 BPS. Currently a 24 water main and 20 force main are existing along the same general route. JEA also proposes a 20 reclaimed water main (CIP ) and a 24 force main (CIP ) along the same general route. The reclaimed project will proceed at the same schedule and pace as this water main project, therefore the two project corridors and design should be coordinated. While the pipe route shown on the provided site plan shows this water main paralleling the existing water main, a route study should be prepared which considers the installation of both projects to determine the most cost effective route. Possible options may include installation within the center island, along the outside edge of pavement, travel lane encroachment and within a private easement outside the road right-of-way. PAGE 1 OF 6

8 INDEX NUMBER TWMP US1 BPS OLD ST. AUGUSTINE RD TO US1 BPS - W No other stub-outs or connections to this water main are proposed. It is anticipated that the final route of this water main may utilize transmission easements, public right-of-ways and possibly other obtained easements. JEA Real Estate should be included in project discussions during the route study to evaluate proposed project corridors and if needed be afforded the necessary time to obtain any required easements. Multiple road crossings including I-295 are anticipated. Wetland and flood zone crossings will also be required. Coordination with the electrical transmission group will be required. This project should include the piping needed to connect to the US 1 Booster Station. This project is located in Duval County. Figures 1, 2 and 3 detail the project work areas. Figure 1 Overall Project Area 20,500 LF 24 WM (PRELIMINARY PROJECT ALIGNMENT) PAGE 2 OF 6

9 INDEX NUMBER TWMP US1 BPS OLD ST. AUGUSTINE RD TO US1 BPS - W Figure 2 Aerial View of Project Location 20,500 LF 24 WM (PRELIMINARY PROJECT ALIGNMENT) PAGE 3 OF 6

10 INDEX NUMBER TWMP US1 BPS OLD ST. AUGUSTINE RD TO US1 BPS - W Figure 3 Water Main Connection at Judith Avenue CONNECT TO 24 WM STUBOUT PROPOSED 24 WM Method of Construction The methods of installation for the proposed water main shall be by any means necessary in accordance with the latest edition of the JEA Water & Sewer Standards Manual and as allowed by the City of Jacksonville and other applicable governing agencies. The project engineer should determine the most economical pipe routing and installation methods while remaining consistent with the JEA standards and specifications. An equivalent pipe diameter of 24 PVC should be maintained when selecting pipe size and material. Special Crossings The installation route will require crossings of City of Jacksonville and FDOT roadways. Other JEA water, sewer and electric facilities are located along the proposed corridor. It is expected other utilities such as gas, phone, fiber optic and cable are also present in some locations. In areas of limited space, travel lane encroachment or temporary construction easements may be required. It is expected that horizontal directional drills (HDD) will be required along the final route. Land Ownership/Real Estate Issues It is anticipated the pipe installation will occur within public rights-of-way, JEA fee simple owned tracts and within JEA easements on private properties. The need for any temporary construction or permanent easements should be evaluated early in the design process to allow time for acquisition. PAGE 4 OF 6

11 INDEX NUMBER TWMP US1 BPS OLD ST. AUGUSTINE RD TO US1 BPS - W All easements and right-of-way issues will be coordinated by the design team and addressed during the project design phase. Survey Requirements Final design of the project should be based on field survey data including horizontal and vertical locations and identification of existing utilities, pavement, guardrail, structures, electrical power poles, mail boxes and drainage features within the project area limits. Right-of-way boundary limits, existing easements and parcel ownership lines should be included on the survey as well as any vegetation deemed protected by the governing jurisdictions including City of Jacksonville protected trees. Any wetland lines or significant habitat community limits should be flagged prior to survey commencement. Site Development Characteristics The project area includes work within public right-of-ways and transmission easements. The presence of environmentally sensitive wetlands within the project corridor should be evaluated. The presence of any listed species should be evaluated concurrently with the wetland line review. Limits of Flood Plain The project corridor crosses multiple flood plain areas per FEMA FIRM panels 569, 590 and 655 for Duval County (see Figure 4). While work will likely occur within the 100 year flood plain, no additional permitting is anticipated as the finished grade of the work limits should be consistent with the original elevations. Figure 4. FEMA Flood Zone Site Overlay PROPOSED 24 WM PAGE 5 OF 6

12 INDEX NUMBER TWMP US1 BPS OLD ST. AUGUSTINE RD TO US1 BPS - W Permit List It is anticipated that at a minimum permits will be required by the City of Jacksonville (10 set review and Right-of-Way permit), Florida Department of Environmental Protection, FDOT, St. Johns River Water Management District and the Army Corps of Engineers. The project corridor should be evaluated for the presence of jurisdictional wetlands, listed species and protected trees. The need for any associated permitting should be addressed during the design phase. Other permits may be determined necessary during the design process and will be obtained by the design team. Project Schedule Major activities are as follows: Engineer Selection October 2018 to April 2019 Survey, Design & Permitting May 2019 to January 2020 Procurement, Construction & Closeout February 2020 to September 2021 Project Management & Delivery Stage Project Definition 10% Schematic Design 30% Conceptua l Design 90% Detail Design 100% Final Design Bid Construction To Project Delivery WWSP PEC PEC PEC PEC PEC PEC OPB Established Trend Trend Trend PAGE 6 OF 6

13 T E C H N I C A L M E M O R A N D U M US-1 GREENLAND WRF TO CR210 TRANS RW PROJECT DEFINITION Index Number US-1 Greenland WRF to CR210 Trans RW PREPARED FOR: JEA Capital Budget Planning PREPARED BY: JEA Water/Wastewater System Planning (George Porter) DATE: February 8, 2018 Introduction This Technical Memorandum (TM) is prepared for the construction of a reclaimed water transmission main. This TM identifies the project location, details the project needs, lists potential design and construction considerations along with providing a preliminary cost estimate and project schedule. Project Description & Justification The Greenland Wastewater Treatment Facility (WWTF) is planned to go into service in 2022; this will be the first JEA WWTF to be constructed as a zero discharge facility. Other JEA WWTFs have become zero discharge over time but were not constructed with the intention to produce 100% reclaimed water. The main focus of Greenland WWTF reclaimed water production is serving the Nocatee and Twin Creeks developments. A dedicated reclaimed water main will be constructed from Greenland WWTF to Valley Ridge Blvd along US-1. Some communities along US-1 will have a potable irrigation jumper that will need to be connected and switched over to reclaimed water. Figure 1 shows the overall limits for this project. Scope Piping At the time of writing this TM multiple sites for Greenland WWTF were under evaluation. The northernmost termination point of this project, Figures 1 and 2, will need to be coordinated with the Greenland WWTF project engineer (JEA Index No. 268-W3). Additional piping beyond what is shown will be required to connect to Greenland WWTF. An intertie with the existing 20-inch reclaimed water main running north-south in the electrical easement adjacent to the Greenland Energy Center is required. The intertie will require a valve, which will remained closed so all reclaimed water will be directed south along US-1; this valve will only be opened as needed. This project includes the design and construction of a 24-inch reclaimed water pipe from Greenland WWTF to the 24-inch stub located at Valley Ridge Blvd and Old Dixie Hwy; US-1 will be the main corridor for most of this project. Some easements are available along the route if needed, see Figures 1-3 and Land Ownership/Real Estate Issues section for more information. There are customers along the route that will need to be switched over from potable water irrigation to reclaimed water, these customers are currently using a potable irrigation jumper connection. Figure 1 identifies customers known at the time of writing this TM (Wells Creek development), more customers could potentially be added in the future; coordinate with Planning during the design stage of this project to assure all reclaimed water customers are connected. The total estimated length of 24-inch pipe to be installed in this project is 39,000 feet. 1

14 US-1 GREENLAND WRF TO CR210 TRANS RW PROJECT DEFINITION See Figure 2 Wells Creek Planned 24 Reclaimed Water Main Existing Booster Pumping Station See Figure 3 2

15 GATE PARKWAY TO BURNT MILL RD - TRANS - RW PROJECT DEFINITION Northern Connection Point (TBD) Intertie with Existing 20 Reclaimed Water Main (location TBD) Alternate Route available (in parallel with 24 Force Main, JEA project ) Planned 24 Reclaimed Water Main 100 FL East Coast RR Easement Available (continues to Racetrack Rd, see Figure 3) 3

16 GATE PARKWAY TO BURNT MILL RD - TRANS - RW PROJECT DEFINITION 100 FL East Coast RR Easement Available (see continuation on Figure 2) Racetrack Rd Existing Booster Pumping Station Alternate Route available (in parallel with existing 20 Reclaimed Water Main) Planned 24 Reclaimed Water Main Southern Connection Point Intertie with 20 Reclaimed Water Main Reclaimed Water Storage and Booster (by others) 20 Reclaimed Water Main (by others, location may vary) 4

17 US-1 GREENLAND WRF TO CR210 TRANS RW PROJECT DEFINITION At CR210, Figure 3, a 20-inch reclaimed water crossing will be installed (under a different project) connecting the 20-inch from Nocatee to the Twin Creeks development. Provide an intertie between the new 24-inch and the existing 20-inch that crosses US-1 to Twin Creeks. Note: the 20-inch to Twin Creeks is a conceptual project at the time of wrting this TM, the location of the pipe is subject to change. It is the responsibility of the project engineer to evaluate all possible routes and provide a recommendation for the most economical route. The route chosen should not prohibit the ability for future connections to be made. Pumping A reclaimed water booster pump station is located at US-1 and Racetrack Rd. The 24-inch pipe for this project will need to be connected to the suction side of the pipe station in parallel with the existing 20-inch pipe, similarly on the discharge side the 24-inch pipe will run in parallel with the existing 20-inch pipe. Internal piping modifications to the pump station may be required to minimize hydraulic losses through the station. The existing booster pump station is rated to provide up to 7,200 gpm of reclaimed water (four 1,800 gpm pumps at build-out, currently only three pumps are installed). As part of this project scope a fourth 1,800 gpm pump will be added along with any related electrical upgrades that are required. Capacity Ultimately all reclaimed water production from Greenland WWTF (build-out capacity 12 mgd) will be conveyed through the planned 24-inch pipe to Nocatee, Twin Creeks and future customers along US-1. At 5 feet per second (fps) up to 7,050 gpm (10.2 mgd) can be conveyed through the 24-inch pipe; depending on supply pressure and or peak demand, 12 mgd or more can be delivered though the reclaimed water main. This project will also intertie with the 20-inch reclaimed water main that runs south from Arlington East WWTF, to supply that region if needed. At build-out, Nocatee and Twin Creeks combined will have an estimated total of 11,245 residential homes (2,650 Twin Creeks, 8,595 Nocatee). Average day demands are estimated to be 6.7 MGD if all homes are irrigating at the same time, peak demands could be as high as 40.5 MGD. Storage tanks are in place, with additional planned for future projects, to help meet demands during peak periods. Both the planned 24-inch and existing 20-inch reclaimed water pipes are needed to meet future demands. Method of Construction The methods of installation for the proposed reclaimed water main shall be by any means necessary in accordance with the latest edition of the JEA Water & Sewer Standards Manual. Install piping at FDOT road 9B in accordance with the FDOT roadway design guidelines. Special Crossings The installation route will require multiple roadway and driveway crossings, including crossing the FDOT road 9B. Wetland impacts are not expected. 5

18 Land Ownership/Real Estate Issues US-1 GREENLAND WRF TO CR210 TRANS RW PROJECT DEFINITION US-1 will be the primary route used for this project; however, there are alternate routes available by means of easements established in the past for this reclaimed water main (see Figures 1-3). It is the responsibility of the project engineer to evaluate all possible routes with consideration to cost and future access. The established easements are only to be used if they are found to be the optimum route with the highest future benefit to JEA. The need for temporary construction or permanent easements should be evaluated early in the design process to allow time for acquisition. All final easements and right-of-way issues will be coordinated by the design team and addressed during the project design phase. Survey Requirements Final design of the project should be based on field survey data including horizontal and vertical locations and identification of existing utilities, pavement, structures and drainage features within the project area limits. Right-of-way boundary limits and parcel ownership lines should be included on the survey as well as any easements. Any vegetation deemed protected by the governing jurisdictions should also be surveyed. If necessary, an environmental consultant should be engaged to determine the presence of jurisdictional wetlands and protected or listed species within the construction limits. Any wetland lines or significant habitat community limits should be flagged prior to survey commencement. Permit List It is anticipated that permits will be required by Duval and St. Johns Counties, Florida Department of Environmental Protection and FDOT. Other permits may be determined necessary during the design process and shall be obtained by the design team. Project Management & Delivery Stage Administered by: Performed by: Submittal to Capital Budget Project Definition WWSP WWSP PD 10% Schematic Design PEC External Contractor 30% Conceptual Design PEC External Contractor Trend 90% Detail Design PEC External Contractor 100% Final Design PEC External Contractor Trend Bid PEC JEA Procurement Trend Construction PEC Contractor 6

19 Sep-19 Aug-19 Jul-19 Jun-19 May-19 Apr-19 Mar-19 Feb-19 Jan-19 Dec-18 Nov-18 Oct-18 Sep-20 Aug-20 Jul-20 Jun-20 May-20 Apr-20 Mar-20 Feb-20 Jan-20 Dec-19 Nov-19 Oct-19 Sep-21 Aug-21 Jul-21 Jun-21 May-21 Apr-21 Mar-21 Feb-21 Jan-21 Dec-20 Nov-20 Oct-20 Sep-22 Aug-22 Jul-22 Jun-22 May-22 Apr-22 Mar-22 Feb-22 Jan-22 Dec-21 Nov-21 Oct-21 US-1 GREENLAND WRF TO CR210 TRANS RW PROJECT DEFINITION Project Schedule Major activities are shown in the following table. FY 2019 List of Activities Days RFP for Design 150 Design 210 FY 2020 List of Activities Days Design 90 Construction Bid Process 30 Construction/Startup 240 FY 2021 List of Activities Days Construction 360 FY 2022 List of Activities Days Construction 150 Risks Continued expansion of the reclaimed water infrastructure helps to minimize effluent discharges to the St. Johns River (TMDL) and reduce the amount of water withdrawn from the Floridan Aquifer (CUP). This project is critical to provide reclaimed water to current and future JEA reclaimed water customers and also to serve as a method to convey reclaimed water from the Greenland WWTF as it is planned to be a zero discharge facility. Revision History Name Date Version Revision Notes 7

20 US-1 GREENLAND WRF TO CR210 TRANS RW PROJECT DEFINITION 8