QUARTERLY STORMWATER UPDATE FLOOD CONTROL PROJECTS PHIL PULLEN, P.E. CITY ENGINEER DECEMBER 11, 2018

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2 QUARTERLY STORMWATER UPDATE FLOOD CONTROL PROJECTS PHIL PULLEN, P.E. CITY ENGINEER DECEMBER 11, 2018

3 D a s h b o a r d Aragona Drainage Improvements, Ashville Park Drainage Improvements Phase I, Central Resort District Drainage Improvements, Chubb Lake/ Lake Bradford, Eastern Shore Drive Drainage Phase I, Sherwood Lakes Drainage Improvements, Southern Canal/Lead Ditch & Culvert Improvements, Stormwater Master Planning, Analysis and Inventory, Windsor Woods, Princess Anne Plaza, and The Lakes, 7-028, &

4 Location of Projects by District

5 Aragona Drainage Improvements, Neighborhood developed in the mid 1950s Storm drain improvements to address severe roadway flooding Project limits include the area south of Haygood Road and west of Aragona Blvd. and part of Overman Avenue Total Project Cost Appropriated to Date FY19 FY20 FY21 FY22 FY23 FY24 Balance To Complete 4 $3,760,000 $3,760,000 $0

6 Aragona Drainage Improvements Fourth Quarter 2018 Activities October 2018 Nationwide Permit Submitted November 1, % Design Completed January 24, 2019 Tentative date for Citizen Information Meeting February/March 2019 Scheduled to advertise for construction Construction is expected to take 15 months 5

7 Ashville Park Drainage Improvements Phase I Total Project Cost Appropriated to Date FY19 FY20 $12,000,000 $2,000,000 $7,000,000 $3,000,000 FY21 FY22 FY23 3 new Stormwater Ponds Expand an Existing Pond Channels Connecting Ponds Regrade and Stabilization of Existing Ditches Stormwater Pump Station Gated Control Structure at Flanagans Lane Ditch and Culvert Improvements at New Bridge/Sandbridge Road Intersection FY24 Balance To Complete $0

8 Ashville Park Drainage Improvements Fourth Quarter 2018 Activities Ongoing Pump down the lake system prior to significant storm event September 10-24, 2018 Extensive Coordination with Developer to Set Hydraulic Criteria for CPA September 11, 2018 Emergency Ingress-Egress Plan Designed for Hurricane Florence; Not Enacted as Storm Subsided September 17, 2018 Sandbridge Rd/New Bridge Rd experienced significant flooding from Wind Tides September 19, 2018 USF&W provided final guidance for what can be built in Phase I without needing ROW Permit after 60% Design Review 7

9 Ashville Park Drainage Improvements Fourth Quarter 2018 Activities October 1, 2018 Received Final Plans for Flanagans Lane/Sandbridge Road Outfall Channel Maintenance October 2, 2018 Project Update Presentation to Agricultural Commission October 15, th Meeting with USF&W on 60% Plan Update for Pump Station & Drainage Improvements October 19, 2018 Received 100% Plans for Princess Anne Farm Ditch Stabilization October 31, 2018 Executed Cost Participation Agreement and Agreement To Dedicate Property Interests November 15, 2018 Citizens Information Meeting 8

10 Ashville Park Drainage Improvements Fourth Quarter 2018 Activities Lake #14 Weir Weir wall structure is poured and forms stripped Intake Structures are set Crane has been demobilized Remaining Items Discharge piping Discharge channel grading and stabilization Roadside ditch regrading/aligning Box culvert installation Electrical and SCADA items 9

11 Central Resort District Drainage Improvements, Multi-phase project to address severe roadway flooding Ultimate improvements include additional storm drains, tide gate, pump station & ocean outfall Interim Projects: o Replace existing 54 pipe located under 24 th Street with box culvert or bridge; estimated cost ~ $6M o Redirect approx. 15 ac. from 21st St and Baltic Ave. to 16th St. Pump Station; estimated cost ~ $15M Total Project Cost Appropriated to Date FY19 FY20 FY21 FY22 FY23 FY24 Balance To Complete 10 $113,000,000 $300,000 $500,000 $112,200,000

12 Central Resort District Drainage Improvements Fourth Quarter 2018 Activities October 2018 Notice to Proceed for Design of 24 th Street culvert replacement project November 2018 Surveying began 11

13 LAKE CHUBB BRADFORD LAKE CHESAPEAKE BAY Chubb Lake/ Bradford Lake, Multi-phase project Storm drain improvements to alleviate roadway flooding Additional stormwater culverts under roadways Tide control devices such as mechanized sluice gates Stormwater management pond improvements Channel and ditch clearing Total Project Cost Appropriated to Date FY19 FY20 FY21 FY22 FY23 FY24 Balance To Complete 12 $32,000,000 $1,084,100 $1,084,100 $1,084,100 $1,084,100 $1,084,100 $1,084,100 $1,084,100 $24,411,300

14 Chubb Lake/ Bradford Lake Fourth Quarter 2018 Activities Public Works continues coordinating with the Navy to open the weir gate when major rain events are forecasted Survey Complete for Early Implementation Projects 780 feet of ditch from the north side of Shore Drive north to Lake Bradford 1,150 feet of ditch from Pleasure House Road (north of Shore Drive) west to Lake Bradford Outfall Channel at Pleasure House Lake located on JEB Little Creek/Fort Story Preparing design contracts for Early Implementation dredging projects and Pleasure House Lake outfall improvements 13

15 Phase I - Section I Pump Station 1A Pump Station 1B Pump Station 1D Poinciana Pump Station Phase I - Section II Eastern Shore Drive Drainage Phase I, Multi-phase project Phase I Sections I & II Funded Flood control drainage improvements Improvements include stormwater collection systems, tide gates & pump stations Total Project Cost Appropriated to Date FY19 FY20 FY21 FY22 FY23 FY24 Balance To Complete 14 $72,500,000 $14,139,357 $3,200,000 $7,200,000 $8,600,000 $7,000,000 $8,000,000 $8,000,000 $16,360,643

16 Eastern Shore Drive Drainage Phase I Fourth Quarter 2018 Activities Cape Henry Canal Drainage Improvements design ongoing Box culvert from Ebb Tide Road to West Great Neck Road Side Street Outfall Improvements to Starfish Rd, Ebb Tide Road & Red Tide Rd Advertise for construction January 2019 Estimated Project Cost $3.5M September 28, 2018 Received 90% Plans for Cape Henry Canal Drainage Improvements October 17, 2018 Coordination meeting with HRSD October 23, 2018 Coordination Meeting with Private Utility Companies 15

17 Eastern Shore Drive Drainage Phase I Fourth Quarter 2018 Activities October 29, 2018 Further HRSD Coordination Valving Hydraulic Modeling LineStop & Bypass Contractor Qualifications October 31, 2018 Received Approval to Use Out-Of-HUC Mitigation Credits and received USACOE Permit Approval November 26, 2018 Presentation to Westminster Canterbury November 27, 2018 Received 100% plans for Cape Henry Canal Drainage Improvements 16

18 Sherwood Lakes Drainage Improvements, Project to address severe roadway and property flooding Improvements include a pump station with a pipe connection between 2 lakes Temporary Pumping in advance of rain event Total Project Cost Appropriated to Date FY19 FY20 FY21 FY22 FY23 FY24 Balance To Complete 17 $3,000,000 $1,000,000 $2,000,000 $0

19 Sherwood Lakes Drainage Improvements Fourth Quarter 2018 Activities Ongoing Lakes pumped down to elevation 3.0 in advance of forecasted significant rainfall November 1, 2018 NTP for Interconnect Pipe project Construction Complete August 2019 November 15, 2018 Citizens Information Meeting January 1, 2019 NTP for North Sherwood Lake Permanent Pump Station project Construction Complete September

20 Southern Canal/Lead Ditch & Culvert Improvements, Drainage improvements to canals, lead ditches and culverts in the southern watershed Improvements may include pipe/culvert replacement, ditch cleaning /regrading or weir backflow preventer Construction is timed to avoid inconvenience to the agricultural community and residents Total Project Cost Appropriated to Date FY19 FY20 FY21 FY22 FY23 FY24 Balance To Complete 19 $10,690,000 $2,350,000 $1,390,000 $1,390,000 $1,390,000 $1,390,000 $1,390,000 $1,390,000 $0

21 Dawley Road between Pleasant Ridge Road and Gum Bridge Road (Beggars Bridge Creek) (Site 5) Clean Culverts Excavate and Regrade Ditches 20

22 Pleasant Ridge Road west of Dawley Road (Site 6) Reshape/Regrade Ditches 21

23 Pleasant Ridge Rd/Charity Neck Rd Intersection (Site 7) Culvert Replacement Reshape/Regrade Ditches Relocate Above Ground Utilities 22

24 Gum Bridge Road between Dawley Road and Charity Neck Road (Site 9) Culvert Replacement Widen Ditches Relocate Above Ground Utilities 23

25 Southern Canal/Lead Ditch & Culvert Improvements Fourth Quarter 2018 Activities Permits are in process for all four projects from VMRC ACOE permits are in process Notice to Proceed for the ditch work by early 2019 Completed 30% Design of Gum Bridge Road and Pleasant Ridge Road/Charity Neck Road Intersection 24

26 Total Project Cost Appropriated to Date FY19 FY20 FY21 FY22 FY23 FY24 SWM Master Planning, Analysis, and Modeling, Updating the City s 31 Stormwater Watershed Models Models provide drainage design parameters such as downstream water surface levels to developers for projects Models identify deficiencies and gaps in the existing stormwater infrastructure Preliminary Drainage Analysis will identify future Capital Drainage Projects in conjunction with results of Sea Level Rise study Balance To Complete 25 $13,770,906 $8,070,906 $1,700,000 $800,000 $800,000 $800,000 $800,000 $800,000 $0

27 SWM Master Planning, Analysis, and Modeling Update on Schedule WATERSHED DRAINAGE BASIN SCHEDULED COMPLETION Lynnhaven 3 thru 8 & 30 Completed Little Creek 1 & 31 December 2018 Atlantic 29 December 2018 Elizabeth River 2 & 17 thru 22 December 2018 (2), August 2019 (17-22) Southern Rivers Upper West Neck 10 Completed Stumpy Lake 12 Completed Canal #1 South 9 Completed Southern 11, 16, & 23 thru 28 December 2018 Upper North Landing 13 thru 15 August 2019 Dates represent when there is a validated/calibrated model. 26

28 Windsor Woods, Princess Anne Plaza & The Lakes, 7-028, 7-050, & Neighborhoods Developed in the 1960s and 1970s Projects combined for initial analysis Needed Improvements Identified o Tide Gates o Pump Stations o Additional Storage o Increase Capacity in Stormwater Conveyance Total Project Cost Appropriated to Date FY19 FY20 FY21 FY22 FY23 FY24 Balance To Complete 27 $353,799,994 $15,250,834 $4,500,000 $5,000,000 $9,000,000 $7,000,000 $7,000,000 $8,300,000 $297,749,160

29 Dredging Projects Fourth Quarter 2018 Activities 28

30 Windsor Woods Canal, CIP Dredge 4,100-ft canal to restore original drainage capacity Approximately 10,900 cubic yards of dredge material Notice to Proceed June 2017 Construction Complete January 2019 Estimated Total Project Cost $2M Avg. Pre-depth: 3.1 Avg. Post-depth:

31 Northgate Ditch, CIP Dredge 6,000-ft canal to restore original drainage capacity Approximately 3,000 cubic yards of dredge material Notice to Proceed May 2017 Construction Complete January 2019 Estimated Total Project Cost $2M Avg. Pre-depth: 1.5 Avg. Post-depth:

32 Windsor Oaks West III, CIP Dredge 2,150-ft canal to restore original drainage capacity Approximately 3,000 cubic yards of dredge material Begin Construction January 2019 Construction Complete September 2019 Estimated Total Project Cost $800K Avg. Pre-depth: 1.8 Avg. Post-depth:

33 Windsor Woods, Princess Anne Plaza & The Lakes Fourth Quarter 2018 Activities Design continuing for Early Implementation projects Three FEMA Reimbursement Projects Club House Road October 2, 2018 Grant Application Submitted to Virginia Department of Emergency Management (VDEM) for 2 Projects Club House Road Thalia Creek Tide Gate 32

34 Early Construction Projects FEMA Reimbursement Projects Project 1 Survey Work Completed Design in progress Construction Start o Project 2 & 3 January 2020 o Project 1 July 2020 Project 2 Project 3 33

35 Club House Road Drainage Improvements/ FEMA Grant Application Survey and Geotech work Complete Finalizing Design Construction Start Delayed due to VDEM Grant Application Estimated Total Project Cost: $2.7M 34

36 Thalia Creek Tide Gate/FEMA Grant Application Interim Pumping Facilities Permanent Gate at Thalia Creek Estimated Total Project Cost: $6.7M 35

37 Thalia Creek Tide Gate/FEMA Grant Application Permit application being prepared for filing with the USACE and the VA DEQ 36

38 Example of Interim Pumping facilities 37 Courtesy of Baker Corporation

39 Windsor Woods, Princess Anne Plaza & The Lakes Fourth Quarter 2018 Activities November 6, 2018 Developed Brochure with Questions & Answers on the Thalia Creek Tide Gate Project 38

40 Windsor Woods, Princess Anne Plaza & The Lakes Fourth Quarter 2018 Activities October 11, 2018 & November 13, 2018 Provided Project Update to the Princess Anne Plaza Civic League November 15, Open House Public Meeting on the Thalia Creek Tide Gate at Princess Anne High School November 28, Open House Public Meeting on the Thalia Creek Tide Gate at Kempsville High School Notified over 400 property owners by letter of Open House Meetings and placed public notice in Beacon December 2018 Permit Application for Thalia Creek Tide Gate to be filed 39

41 Lake Trashmore WINDSOR WOODS PUMP STATION AND TIDE GATE LOCATION Lake Windsor NEW STORM DRAINS WILL BE INSTALLED IN THE PROJECT AREA Preliminary Concept Plan POTENTIAL NORTH PUMP STATION AND TIDE GATE LOCATION POTENTIAL STORMWATER RETENTION PONDS Lynnhaven Pkwy Northgate Plaza Ball Fields POTENTIAL SOUTH TIDE GATE & CHANNELS LOCATION 40

42 Windsor Woods Major Improvements DRAINAGE IMPROVEMENT COST (MILLIONS) PERCENT OF TOTAL Storm Drains $ % Lake Windsor Pump Station $ % Barriers $ % Tide Gates & Interim Pump Station $ % Other Costs $ % TOTAL $

43 Princess Anne Plaza and The Lakes Major Improvements DRAINAGE IMPROVEMENT COST (MILLIONS) PERCENT OF TOTAL Additional Storage 1 $ % Northern Pump Station 2 $ % Storm Drains $ % Bow Creek Amenities $ % Southern Tide Gate & Channels $ % Barriers 3 $ % Other Costs $ % TOTAL $ Storage at Bow Creek Golf Course, Plaza Northgate Park and Oak Springs Park 2 Includes northern tide gate, channels, barriers, and pump station 3 Southern barriers only 42

44 43 DISCUSSION