QUARTERLY STORMWATER UPDATEFLOOD CONTROL PROJECTS

TONI ALGER, P.E. – CITY ENGINEER’S OFFICE/STORMWATER ENGINEERING CENTERSEPTEMBER 26, 2017

Aragona Drainage Improvements

Ashville Park Drainage Improvements

Central Resort District Drainage Improvements

Eastern Shore Drive Drainage

Lake Chubb/Bradford Lake

Sherwood Lakes Drainage Improvements

Stormwater Master Planning, Analysis and Inventory

Windsor Woods, Princess Anne Plaza, and The Lakes

DASHBOARD

2

FLOOD CONTROL PROJECTS IN THE FY 2018-2023 CIPCIP Number Project Name FY 2018 FY 2019 FY 2020 FY 2021 FY 2022 FY 2023 Total

Programmed

7400000 Aragona Drainage Improvements $ 1,400,000 $ - $ - $ - $ - $ - $ 1,400,000

7047000 Ashville Park Drainage Improvements $ 2,000,000 $ 3,000,000 $ 4,000,000 $ - $ - $ - $ 9,000,000

7041000 Central Resort District Drainage Improvements $ - $ - $ - $ - $ - $ - $ -

7151000 Eastern Shore Drive Drainage Phase I $ 1,000,000 $ 4,200,000 $ 6,200,000 $ 8,600,000 $ 7,000,000 $ 8,000,000 $ 35,000,000

7053000 Lake Chubb/Bradford Lake $ 1,084,100 $ 1,084,100 $ 1,084,100 $ 1,084,100 $ 1,084,100 $ 1,084,100 $ 6,504,600

7048000 Sherwood Lakes Drainage Improvements $ 1,000,000 $ 2,000,000 $ - $ - $ - $ - $ 3,000,000

7027000 SWM Master Planning, Analysis, and Inventory $ 2,700,000 $ 1,700,000 $ 800,000 $ 800,000 $ 800,000 $ 800,000 $ 7,600,000

7050000 Princess Anne Plaza Drainage Area $ 2,000,000 $ 3,000,000 $ 4,000,000 $ 4,000,000 $ 2,000,000 $ 5,000,000 $ 20,000,000

7051000 The Lakes Drainage Improvements $ 2,000,000 $ - $ - $ - $ - $ - $ 2,000,000

7028000 Windsor Woods Drainage $ 2,000,000 $ 1,500,000 $ 1,000,000 $ 5,000,000 $ 5,000,000 $ 2,000,000 $ 16,500,000

$ 15,184,100 $ 16,484,100 $ 17,084,100 $ 19,484,100 $ 15,884,100 $ 16,884,100 $101,004,600 $101,004,600

3

ASHVILLE PARK DRAINAGE IMPROVEMENTS, 7-047 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

4

ASHVILLE PARK DRAINAGE IMPROVEMENTS FIRST QUARTER ACTIVITIES▪ Pump down lakes in advance of forecasted significant rainfall

▪ Preliminary design underway – due December 2017

▪ Created a project web page: https://www.vbgov.com/government/departments/public-works/storm-water/Pages/ashville-park-sw.aspx

▪ Met with Developer to discuss cost participation agreement

▪ Gated control structure is under design; 100% design plans are due in October 2017

5

ASHVILLE PARK DRAINAGE IMPROVEMENTS FIRST QUARTER ACTIVITIES▪ Met with Fish & Wildlife to discuss project

▪ Made the following presentations:o April 5, 2017 – Ashville Park Civic Leagueo June 1, 2017 – ITA Committee Meetingo June 22, 2017 – Mrs. Henley’s Citizen Forumo July 18, 2017 – City Council Briefingo August 2, 2017 – Mrs. Henley’s “Everything Stormwater in the Southern

Watershed” Presentationo August 7, 2017 – Ashville Park Civic League

6

SHERWOOD LAKES DRAINAGE IMPROVEMENTS, 7-048

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 –$5M

7

SHERWOOD LAKES DRAINAGE IMPROVEMENTSFIRST QUARTER ACTIVITIES▪ May 2017, engineering analysis of the hydrology and hydraulics of

the two lakes was completed

▪ Lakes pumped down in advance of forecasted significant rainfall

▪ Improvements were identified to lower and maintain the elevation of the lakes to 3.0-ft

▪ Pump station vault and discharge pipes design underway –100% Complete

▪ Permanent Pump design underway – 30% complete

8

SHERWOOD LAKES DRAINAGE IMPROVEMENTSFIRST QUARTER ACTIVITIES▪ Numerous meetings with the developer, HAV

▪ Created a project web page: https://www.vbgov.com/government/departments/public-works/storm-water/Pages/sherwood-lakes-07-17.aspx

9

WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKES, 7-028, 7-050, & 7-051

Detailed Engineering Analyses to develop the specific program of flood control measures

Projects combined for initial analysis

Analyses will Identifyo Needed Improvementso Cost of the Improvementso Implementation and Phasing

Plano Environmental Permitting

Required

10

WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKESFIRST QUARTER ACTIVITIES▪ May 9, 2017 – Budget Approved

▪ May 10, 2017 – RFP for A/E Services Posted

▪ May 19, 2017 – Notice to Proceed Northgate Ditch Project ($2M)

▪ June 22, 2017 – SOIQs received

▪ June 27, 2017 – Notice to Proceed Windsor Woods Canal Project ($2M)

▪ July 11, 2017 – Notice to Proceed Windsor Oaks West II Canal Project ($850K)

11

WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKESFIRST QUARTER ACTIVITIES▪ July 20, 2017 – Michael Baker International teamed with CDM

Smith selected

▪ October 2017 – Windsor Oaks West I Canal Project to be Completed ($800K)

▪ Created a project web page: https://www.vbgov.com/government/departments/public-works/storm-water/Pages/plaza-drainage-12-15.aspx

12

WINDSOR WOODS, PRINCESS ANNE PLAZA & THE LAKESFIRST QUARTER ACTIVITIES▪ Made the following presentations:

o June 13, 2017 – Princess Anne Plaza Civic League Stormwater Presentationo September 5, 2017 – City Council Briefingo September 12, 2017 – Princess Anne Plaza Civic League Stormwater

Presentation

13

ARAGONA DRAINAGE IMPROVEMENTS, 7-400

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 30% complete

Estimated Project Cost –$3.7M

14

ARAGONA DRAINAGE IMPROVEMENTSFIRST QUARTER ACTIVITIES▪ Modeling the area south of Haygood Road and west of Aragona

Blvd. to determine cause of flooding that occurred during Fall of 2016

▪ Overman Avenue was added to the project limits after excessive spread was observed at the storm drain inlets

▪ Received the 30% design plans; Scheduled to advertise for construction in July 2018

15

CENTRAL RESORT DISTRICT DRAINAGE IMPROVEMENTS, 7-041

Multi-phase project to address severe roadway flooding

Improvements include storm drains, tide gate, pump station & ocean outfall

Interim Project: Redirect approx. 15 ac. from 21st St and Baltic Ave. to 16th St. Pump Station; estimated project cost ~ $15M

ATD: $300K, BTC: $112.7M

16

CENTRAL RESORT DISTRICT DRAINAGE IMPROVEMENTSFIRST QUARTER ACTIVITIES▪ Central Resort Area Drainage Study Report and supplemental Beach

Garden Park Pump Station Alternative Analysis Report Completed

▪ Analysis underway to evaluate a potential stormwater management pond at the Visitor Center

▪ No further project activities due to funding constraints

17

EASTERN SHORE DRIVE DRAINAGE PHASE I,7-151 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

Identify Early Implementation projects

18

EASTERN SHORE DRIVE DRAINAGE PHASE IFIRST QUARTER ACTIVITIES▪ Cape Henry Ditch Sluice Gates Completed (3 gates)

o Project Cost – $1.3M

▪ Detailed Engineering Analyses completed▪ 30% Plans completed▪ Cape Henry Canal Drainage Improvements design underway

o Provides an improved drainage outfall for the Shore Drive Corridor Improvements – Phase III project (CIP 2-117)

o Deepen and Widen canal between Starfish Road and Beech Street o Begin construction in July 2018o Estimated Project Cost – $8M

19

CHUBB LAKE/ LAKE BRADFORD, 7-053

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

LAKECHUBB

BRADFORDLAKE

CHESAPEAKE BAY

20

CHUBB LAKE/ LAKE BRADFORDFIRST QUARTER ACTIVITIES▪ May 10, 2017 – RFP for A/E Services Posted▪ June 14, 2017 – SOIQs Received▪ July 27, 2017 – RK&K Selected▪ August 10, 2017 – Scoping Meeting Held▪ First Phase:

o Public Involvemento Preliminary Engineering Report▪ Identify Early Implementation Projects▪ Develop Project Schedule

21

CHUBB LAKE/ LAKE BRADFORDFIRST QUARTER ACTIVITIES▪ Public Works is coordinating with the Navy

o April 19, 2017 – Lake Bradford outfall ditch maintenance coordination meetingo July 15, 2017 – Coordinated with base regarding access to perform

maintenance (snag and drag) on ditch from Lake Bradford to Weir Gateo August 8, 2017 – Update related to ditch maintenance from weir gate to Boone

Clinico August 28, 2017 – Pre-storm coordination for Nor-Eastero September 9 , 2017 – Pre-storm coordination for tropical depressiono September 18, 2017 – Pre-storm coordination for Hurricane Joseo September 25, 2017 – Pre-storm coordination Hurricane Maria

22

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 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

23

SWM MASTER PLANNING, ANALYSIS, AND MODELINGFIRST QUARTER ACTIVITIES▪ Lynnhaven River Watershed

o Watersheds 3, 5, & 8 are completeo Watersheds 7, 4, 30 & 6 to be completed by the end of the year

▪ Southern Rivers Watershedo Watersheds 9 and 10 to be complete by the end of the yearo Watersheds 12-15 to be complete by February 2019o Watersheds 11, 16, 23-28 to be complete by April 2020

24

SWM MASTER PLANNING, ANALYSIS, AND MODELINGFIRST QUARTER ACTIVITIES▪ Little Creek Watersheds

o Watershed 31 to be complete by March 2018o Watershed 1 to be complete by April 2018

▪ Atlantic Ocean Watershed o Watershed 29 to be complete by April 2019

▪ Elizabeth River Watershedso Watershed 2 to be complete by April 2018o Watersheds 17-22 to be complete by July 2019

25

DISCUSSION