QUARTERLY STORMWATER UPDATE FLOOD CONTROL PROJECTS TONI ALGER, P.E. CITY ENGINEER S OFFICE/STORMWATER ENGINEERING CENTER DECEMBER 12, 2017

Size: px

Start display at page:

Download "QUARTERLY STORMWATER UPDATE FLOOD CONTROL PROJECTS TONI ALGER, P.E. CITY ENGINEER S OFFICE/STORMWATER ENGINEERING CENTER DECEMBER 12, 2017"

Felix Stephens
6 years ago
Views:

1 QUARTERLY STORMWATER UPDATE FLOOD CONTROL PROJECTS TONI ALGER, P.E. CITY ENGINEER S OFFICE/STORMWATER ENGINEERING CENTER DECEMBER 12, 2017

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

ARAGONA DRAINAGE IMPROVEMENTS, 7-400 Neighborhood developed in the mid 1950s Storm drain improvements to address severe roadway flooding

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. Under Design Approximately 50% complete Estimated Project Cost $3.7M 3

4 ARAGONA DRAINAGE IMPROVEMENTS SECOND QUARTER ACTIVITIES Modeling the area south of Haygood Road and west of Aragona Boulevard o Modeling will show necessary long-term improvements Design ongoing, approximately 50% complete Scheduled to advertise for construction in July

ASHVILLE PARK DRAINAGE IMPROVEMENTS, 7-047 5 Storm drain improvements to address

Structure at Existing Outfall (Flanagans Lane) Additional Stormwater Ponds

5 ASHVILLE PARK DRAINAGE IMPROVEMENTS, Storm drain improvements to address severe roadway and property flooding Stormwater Pump Station Gated Control Structure at Existing Outfall (Flanagans Lane) Additional Stormwater Ponds Temporary pumping in advance of significant rainfall events Phase I Estimated Project Cost $8.2M

6 ASHVILLE PARK DRAINAGE IMPROVEMENTS SECOND QUARTER ACTIVITIES Pump down lakes in advance of forecasted significant rainfall Gated control structure design is complete o Awaiting final DEQ permitting approval o Dominion Energy coordination Phase I preliminary design underway due December 2017 Met with Developer October 20, 2017 to discuss cost participation agreement 6

CENTRAL RESORT DISTRICT DRAINAGE IMPROVEMENTS, 7-041 7 ATD: $300K, BTC: $112.

7 CENTRAL RESORT DISTRICT DRAINAGE IMPROVEMENTS, ATD: $300K, BTC: $112.7M Multi-phase project to address severe roadway flooding Improvements include storm drains, tide gate, pump station & ocean outfall Interim Projects: o Redirect approx. 15 ac. from 21st St and Baltic Ave. to 16th St. Pump Station; estimated cost ~ $15M o Replace existing 42 pipe located under 24 th Street with box culvert or bridge; estimated cost ~ $5M

8 CENTRAL RESORT DISTRICT DRAINAGE IMPROVEMENTS SECOND QUARTER ACTIVITIES Draft is under review for the analysis to evaluate a potential stormwater management pond at the Visitor Center Presentation to City Council November 21, 2017 No further project activities at this time 8

LAKE CHUBB CHESAPEAKE BAY CHUBB LAKE/ LAKE BRADFORD, 7-053 BRADFORD LAKE Multi-phase project Storm drain improvements to alleviate roadway flooding

9 LAKE CHUBB CHESAPEAKE BAY CHUBB LAKE/ LAKE BRADFORD, 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 9

10 CHUBB LAKE/ LAKE BRADFORD SECOND QUARTER ACTIVITIES Public Works continues coordinating with the Navy to open the weir gate when major rain events are forecasted Public Works/Operations cleared the ditch from Lake Bradford to Nider Blvd. o Waiting on permit to complete the project from Nider Blvd to Boone Clinic culvert Preliminary stormwater model is complete and under review First Phase: o Public Involvement o Preliminary Engineering Report Identify Early Implementation Projects Develop Project Schedule 10

EASTERN SHORE DRIVE DRAINAGE PHASE I, 7-151 Multi-phase project Flood control drainage improvements Improvements include stormwater

11 EASTERN SHORE DRIVE DRAINAGE PHASE I, Multi-phase project 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 11

12 EASTERN SHORE DRIVE DRAINAGE PHASE I SECOND QUARTER ACTIVITIES Cape Henry Canal Drainage Improvements design underway o Box culvert from Ebb Tide Road to West Great Neck Road o Begin construction in July 2018 o Estimated Project Cost $8M 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 12

SHERWOOD LAKES DRAINAGE IMPROVEMENTS, 7-048 Project to address severe roadway and property flooding Improvements include a

13 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 Project Cost $3.75M 13

14 SHERWOOD LAKES DRAINAGE IMPROVEMENTS SECOND QUARTER ACTIVITIES Lakes pumped down to elevation 3.0 in advance of forecasted significant rainfall Design for the Permanent Pump Station including interconnect pipe is approximately 90% complete Design for pump station vault, lake intake pipe, and outfall pipe design is complete Real Estate is working with HOA on right of entry and easement plat for the outfall pipe Finalizing the Environmental permit for the outfall 14

WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES, 7-028, 7-050, & 7-051 15 Detailed Engineering Analyses to develop the specific program of flood control measures Projects

15 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

16 WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES SECOND QUARTER ACTIVITIES Detailed Engineering Analyses to Develop the Specific Program of Flood Control Measures underway Flood Mitigation Assistance Grant 3 projects (upsizing pipes) o South Plaza Trail $4.2M ($3.2M Federal, $1.0M Local) Rosemont Road to Presidential Boulevard 4,813 lf of pipe o Old Forge Road $948K ($711K Federal, $237K Local) Old Forge Court to Red Lion Road 1,415 lf of pipe o Kings Point Court $201K ($158K Federal, $43K Local) 445 lf of pipe 16

17 WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES SECOND QUARTER ACTIVITIES Use of temporary commercial flood barriers being evaluated 15 early implementation construction projects identified Initial screening of 15 early implementation construction projects in Windsor Woods performed o Can the early implementation construction project be started in 12 months and be completed within 3 years? o Does the project provide independent beneficial flood relief in the area? o Are the project costs within CIP budget? 17

18 15 EARLY CONSTRUCTION PROJECTS IDENTIFIED 1. Clubhouse Road Pipe Replacement and Outfall Channel Improvements 18

19 WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES SECOND QUARTER ACTIVITIES Feasibility analysis for Club House Road Storm Drain and Outfall Improvement project is being performed and will be completed by end of the year October 16, 2017 Coordination meeting with PW/Operations and Parks and Recreation o Bow Creek Golf Course ditch from hole #2 to Bow Creek is scheduled to be snagged and dragged in January 2018 o Storm Drains on Elmont Road were cleaned November 2017 November 7, 2017 Public Utilities kick-off coordination meeting 19

20 WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES SECOND QUARTER ACTIVITIES December 15, 2017 Final stormwater model for Windsor Woods, Princess Anne Plaza and The Lakes to be submitted for review Made the following presentations: o October 10, 2017 Princess Anne Plaza Civic League Project Update o November 14, 2017 Princess Anne Plaza Civic League Project Update o December 12, 2017 Princess Anne Plaza Civic League Project Update 20

ACTIVE PROJECTS Avg. Pre-depth: 3.1 Avg. Post-depth: 5.2 WINDSOR WOODS CANAL, CIP 7-028.

21 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 June 2018 Total Project Cost $2M 21

ACTIVE PROJECTS Avg. Pre-depth: 1.5 Avg. Post-depth: 4.4 NORTHGATE DITCH, CIP 7-028.

22 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 January 2018 Total Project Cost $2M 22

ACTIVE PROJECTS Avg. Pre-depth: 0.8 Avg. Post-depth: 4.05 WINDSOR OAKS WEST I, CIP 7-415.

23 ACTIVE PROJECTS 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 23

ACTIVE PROJECTS Avg. Pre-depth: 0.65 Avg. Post-depth: 4.55 WINDSOR OAKS WEST II, CIP 7-415.

24 ACTIVE PROJECTS 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 Approximately 7,000 cubic yards of dredge material Notice to Proceed July 2017 Construction Complete January 2018 Estimated Total Project Cost $850K 24

ACTIVE PROJECTS Avg. Pre-depth: 1.8 Avg. Post-depth: 4.95 WINDSOR OAKS WEST III, CIP 7-415.

25 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 5,000 cubic yards of dredge material Begin Construction January 2018 Construction Complete August 2018 Estimated Total Project Cost $650K 25

26 SWM MASTER PLANNING, ANALYSIS, AND MODELING, 7-027 Updating the City s 31 Stormwater Watershed Models Includes Preliminary Drainage Analysis to identify future Capital Drainage Projects Models

26 26 SWM MASTER PLANNING, ANALYSIS, AND MODELING, 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 water surface levels to developers for projects Models will be kept up to date and reside in the Stormwater Engineering Center

27 SWM MASTER PLANNING, ANALYSIS, AND MODELING SECOND QUARTER ACTIVITIES Lynnhaven River Watershed o Watersheds 4 & 7 to be complete by January 2018 o Watershed 6 to be complete by February 2018 o Watershed 30 to be complete by March 2018 Little Creek Watersheds o Watershed 31 to be complete by August 2018 o Watershed 1 to be complete by September 2018 Atlantic Ocean Watershed o Watershed 29 to be complete by January

28 SWM MASTER PLANNING, ANALYSIS, AND MODELING SECOND QUARTER ACTIVITIES Elizabeth River Watersheds o Watershed 2 to be complete by April 2018 o Watersheds to be complete by February 2019 Southern Rivers Watershed o Watersheds 9 to be complete by May 2018 o Watersheds 10 to be complete by April 2018 o Watershed 12 to be complete by June 2018 o Watershed 14 & 15 to be complete by January 2019 o Watersheds 11, 13, 16, to be complete by February

29 DISCUSSION

PROPOSED STORMWATER PROJECT IMPLEMENTATION PLAN. o Execution of New and Expanded Flood Control Projects o Program Options

PROPOSED STORMWATER PROJECT IMPLEMENTATION PLAN o Execution of New and Expanded Flood Control Projects o Program Options PHILLIP A. DAVENPORT DIRECTOR OF PUBLIC WORKS APRIL 25, 2017 FLOOD CONTROL PROJECTS