QUARTERLY STORMWATER UPDATE FLOOD CONTROL PROJECTS TONI ALGER, P.E. STORMWATER ENGINEERING CENTER ADMINISTRATOR JUNE 26, 2018

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1 QUARTERLY STORMWATER UPDATE FLOOD CONTROL PROJECTS TONI ALGER, P.E. STORMWATER ENGINEERING CENTER ADMINISTRATOR JUNE 26, 2018

2 Aragona Drainage Improvements D A S H B O A R D Central Resort District Drainage Improvements Chubb Lake/ Lake Bradford Eastern Shore Drive Drainage Sherwood Lakes Drainage Improvements Southern Canal/Lead Ditch & Culvert Improvements Stormwater Master Planning, Analysis and Inventory Windsor Woods, Princess Anne Plaza, and The Lakes Ashville Park Drainage Improvements Phase I 2

3 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 Estimated Total Project Cost: $3.76M 3

4 ARAGONA DRAINAGE IMPROVEMENTS SECOND QUARTER 2018 ACTIVITIES Design ongoing, approximately 90% complete Phased project to accommodate funding o Engineer s estimate exceeded funding o Removed part of Overman Ave from initial phase Scheduled to advertise for construction in October 2018 Construction is expected to take 15 months 4

5 CENTRAL RESORT DISTRICT DRAINAGE IMPROVEMENTS, Estimated Total Project Cost: $113M; BTC $112.2M 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 42 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 5

6 CENTRAL RESORT DISTRICT DRAINAGE IMPROVEMENTS SECOND QUARTER 2018 ACTIVITIES Negotiating a work order to begin design on the 24 th Culvert Replacement Project 6

7 LAKE CHUBB CHESAPEAKE BAY CHUBB LAKE/ BRADFORD 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 Estimated Total Project Cost: $32M; BTC: $24.4M Channel and ditch clearing 7

8 CHUBB LAKE/ BRADFORD LAKE SECOND QUARTER 2018 ACTIVITIES Public Works continues coordinating with the Navy to open the weir gate when major rain events are forecasted Public Works/Operations received permit to remove sediment from ditch between Nider Boulevard and Boone Clinic culvert o Dredging should begin in the next 60 days Navy provided ditch and culvert crossing information to Public Works Early Implementation Projects Underway o 780 feet of ditch from the north side of Shore Drive north to Lake Bradford o 1,150 feet of ditch from Pleasure House Road (north of Shore Drive) west to Lake Bradford 8

9 Phase I - Section I Poinciana Pump Station EASTERN SHORE DRIVE DRAINAGE PHASE I, Multi-phase project Phase I Sections I & II Funded Pump Station 1A Pump Station 1B Pump Station 1D Estimated Total Project Cost: $83.2M; BTC $27.1M Phase I - Section II Flood control drainage improvements Improvements include stormwater collection systems, tide gates & pump stations Detailed Engineering Analyses to develop the specific program of flood control measures 9

10 EASTERN SHORE DRIVE DRAINAGE PHASE I SECOND QUARTER 2018 ACTIVITIES April 26, 2018 Pre-Application Joint Permit filed with USACOE April/May 2018 Utility coordination meetings with HRSD and Public Utilities May 11, 2018 Coordination and Site Visit with Parks & Recreation, Lynnhaven Public Marina Staff, and Coastal Engineering June 9, 2018 Lynnhaven Colony Presentation, Phase I, Sections I & II Proposed Improvements 10

11 EASTERN SHORE DRIVE DRAINAGE PHASE I SECOND QUARTER 2018 ACTIVITIES Cape Henry Canal Drainage Improvements design ongoing o Box culvert from Ebb Tide Road to West Great Neck Road o Side Street Outfall Improvements to Starfish Rd, Ebb Tide Road & Red Tide Rd o Advertise for construction September 2018 o Estimated Project Cost $3M o Provides an improved drainage outfall for the Shore Drive Corridor Improvements Phase III project (CIP 2-117) Parcel at Page Avenue for future pump station is being acquired as part of the Shore Drive Corridor Improvements Phase III Roadway project o Appraisals are underway 11

12 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 Estimated Total Project Cost: $3M 12

13 SHERWOOD LAKES DRAINAGE IMPROVEMENTS SECOND QUARTER 2018 ACTIVITIES Ongoing Lakes pumped down to elevation 3.0 in advance of forecasted significant rainfall Design for pump station vault, lake intake pipe, outfall pipe, permanent pump station and interconnect pipe is complete June 24, 2018 Interconnect Pipe project advertised for construction Value Engineering underway for the Pump Station design 13

14 SOUTHERN CANAL/LEAD DITCH & CULVERT IMPROVEMENTS, $1.39M/Year Allocated Drainage improvements to canals, lead ditches and culverts in the southern watershed Improvements may include pipe/culvert replacement, ditch/channel clearing Construction is timed to avoid inconvenience to the agricultural community and residents 14

15 SOUTHERN CANAL/LEAD DITCH & CULVERT IMPROVEMENTS SECOND QUARTER 2018 ACTIVITIES Additional $990K allocated per year from Agricultural Reserve Program FY19 Projects Dawley Road between Pleasant Ridge Road and Gum Bridge Road (Beggars Bridge Creek) o Pavement Overlay o Excavate and Widen Ditches Pleasant Ridge Road west of Dawley Road o Replace Culvert under Roadway o Reshape and Regrade Ditches o Relocate above ground utilities 15

16 SOUTHERN CANAL/LEAD DITCH & CULVERT IMPROVEMENTS SECOND QUARTER 2018 ACTIVITIES Gum Bridge Road between Dawley Road and Charity Neck Road o Road Improvements o Culvert Replacement o Widen Ditches o Relocate Above Ground Utilities 16

17 SWM MASTER PLANNING, ANALYSIS, AND MODELING, Total Project Cost: $13.7M Updating the City s 31 Stormwater Watershed Models Includes Preliminary Drainage Analysis to identify future Capital Drainage Projects Models will allow Stormwater Engineering Center to provide drainage design parameters such as downstream tailwaters to developers for projects Models will be kept up to date and reside in the Stormwater Engineering Center 17

18 SWM MASTER PLANNING, ANALYSIS, AND MODELING UPDATE ON SCHEDULE Lynnhaven River Watershed o Watersheds 3 8 are complete o Watersheds 30 & 31 to be complete by June 2018 o Watershed 1 to be complete by December 2018 Atlantic Ocean Watershed o Watershed 29 to be complete by December

19 SWM MASTER PLANNING, ANALYSIS, AND MODELING UPDATE ON SCHEDULE Elizabeth River Watersheds o Watershed 2 to be complete by August 2018 o Watersheds to be complete by February 2019 Southern Rivers Watershed o Watersheds 10 and 12 to be complete by June 2018 o Watershed 9 to be complete by August 2018 o Watersheds 11, 13-16, & to be complete by August

20 Estimated Total Project Cost: $129M; BTC: $73M WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES, 7-028, 7-050, & Detailed Engineering Analyses to develop the specific program of flood control measures Projects combined for initial analysis Analyses will Identify o Needed Improvements o Cost of the Improvements o Implementation and Phasing Plan o Environmental Permitting Required 20

21 WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES SECOND QUARTER 2018 ACTIVITIES Design underway for Early Implementation projects o Club House Road o Three FEMA Reimbursement Projects Preliminary Engineering Analysis Nearing Completion Pump Stations Locations Analysis Nearing Completion Created project brochure Developed Preliminary Schedule of Improvements 21

22 WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES SECOND QUARTER 2018 ACTIVITIES April 13, 2018 Established a Visionary Planning Action Committee (VPAC) May 15, 2018 Meeting with VDEM to discuss FMA Grant Pre-Application May 30, 3018 Pre-Application Meeting with Army Corps of Engineers, Department of Environmental Quality (DEQ) and VA Marine Resources Commission (VMRC) on Thalia Creek Tide Gate June 11, 2018 Integrated VPAC with the City s SGT 4 Revitalize Neighborhoods Strategic Goals Team June 19, 2018 Submitted pre-applications to VDEM for FMA Grant Attended the following meetings: o April 10, 2018 Princess Anne Plaza Civic League Project Update o May 8, 2018 Princess Anne Plaza Civic League Project Update 22

23 FMA GRANT PROJECTS CARRIAGE HILL ROAD AT KINGS ARMS DRIVE (PRINCESS ANNE PLAZA) Estimated Total Project Cost: $64K 23

24 FMA GRANT PROJECTS LAKE WINDSOR DRAINAGE IMPROVEMENT THALIA GATE PROJECT Permanent Gate at Thalia Creek Estimated Total Project Cost: $5M 24

25 EARLY CONSTRUCTION PROJECTS/FMA GRANT PROJECT CLUB HOUSE ROAD DRAINAGE IMPROVEMENTS Design in Progress Survey and Geotech work underway Complete Design October 2018 Construction Start January 2019 Acquisition Complete September 2019 Estimated Total Project Cost: $2M 25

26 EARLY CONSTRUCTION PROJECTS FEMA REIMBURSEMENT PROJECTS Project 1 $4.2M Design in progress Survey Work Underway Construction Start o Project 2 & 3 January 2020 o Project 1 July 2020 Project 2 $948K Project 3 $201K 26

27 DREDGING PROJECTS 27

28 COMPLETED PROJECTS Before After Avg. Pre-depth: 0.8 Avg. Post-depth: 4.05 WINDSOR OAKS WEST I, CIP Dredge 1,510-ft canal to restore original drainage capacity 4,218 cubic yards of dredge material removed Notice to Proceed June 2017 Construction Complete Total Project Cost $700K 28

29 COMPLETED PROJECTS Before After Avg. Pre-depth: 0.65 Avg. Post-depth: 4.55 WINDSOR OAKS WEST II, CIP Dredge 2,760-ft canal to restore original drainage capacity 7,053 cubic yards of dredge material removed Notice to Proceed July 2017 Construction Complete Total Project Cost $675K 29

30 ACTIVE PROJECTS Avg. Pre-depth: 3.1 Avg. Post-depth: 5.2 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 July 2018 Estimated Total Project Cost $2M 30

31 ACTIVE PROJECTS Avg. Pre-depth: 1.5 Avg. Post-depth: 4.4 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 July 2018 Estimated Total Project Cost $2M 31

32 ACTIVE PROJECTS Avg. Pre-depth: 1.8 Avg. Post-depth: 4.95 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 October 2018 Construction Complete July 2019 Estimated Total Project Cost $625K 32

33 WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES PRELIMINARY CONCEPT PLAN Construction of Barriers/Gates to Block Incoming Tides Construction of Stormwater Pumping Stations Additional Lake Storage Capacity Additional Retention/Storage Lakes Increase the Stormwater Conveyance Capacity 33

34 WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES PRELIMINARY CONCEPT PLAN 34

35 EXAMPLE CITY STORMWATER PUMP STATION 35

36 EXAMPLE CITY TIDAL FLOOD GATE 36

37 ASHVILLE PARK DRAINAGE IMPROVEMENTS PHASE I Estimated Total Project Cost: $11.1M 3 new Stormwater Ponds Expand an Existing Pond Channels Connecting Ponds Regrade and Stabilization of Existing Ditches Stormwater Pump Station Gated Control Structure at Existing Outfall (Flanagans Lane) Ditch and Culvert Improvements at New Bridge/Sandbridge Road Intersection 37

38 ASHVILLE PARK DRAINAGE IMPROVEMENTS SECOND QUARTER 2018 ACTIVITIES Ongoing Pump down the lake system prior to significant storm event April 2, % plans received April 16, % pump station plans received April 20, 2018 Installed a static elevation gauge in Flanagans Ln ditch April 24, 2018 Staked 150-ft Buffer at BMP #6 April 24, 2018 Obtained Right of Entry to construct the weir April 25, 2018 Bids opened for the weir project o Rates Being Negotiated o Construction expected to begin in July 38

39 ASHVILLE PARK DRAINAGE IMPROVEMENTS SECOND QUARTER 2018 ACTIVITIES April 27, 2018 Draft Term Sheet for CPA provided to Council May 1, 2018 City Council briefing by Barry Frankenfield & Tom Leahy May 2, 2018 Met with homeowners along Flanagans Lane May 10, 2018 Met with Fish & Wildlife June 19, 2018 City Council briefing by Tom Leahy on the CPA June 20, 2018 Met with the Developer to discuss revisions to the CPA 39

40 DISCUSSION