Winter Springs Stormwater Briefing (09-23-24)

This presentation provides an update on several key stormwater management projects in Winter Springs, including those funded by grants following Hurricane Ian. It covers the status of ongoing repairs, rehabilitation efforts, and watershed evaluations aimed at reducing flood risks and improving stormwater systems. Highlights include NRCS-funded debris and sediment removal, Hazard Mitigation Grant Program (HMGP) applications for flood-prone homes and critical infrastructure, and detailed assessments of Gee Creek and No Name Creek watershed improvements. Additionally, updates on Tuskawilla Crossings Pond 1 repairs and Wetland Park outfall improvements are discussed.

1. STORMWATER BRIEFING #4
City Commission Meeting
September 23, 2024

2. PRESENTATION
OUTLINE
Hurricane Ian Grant Funded NRCS Projects
HMGP Projects
Tuskawilla Crossings Subdivision Pond 1
Repairs and Rehabilitation
Wetland Park Outfall Improvements
Gee Creek / No Name Creek Watershed Evaluation

3. Hurricane Ian
Grant Funded
NRCS Projects
3

4. Summary of NRCS Projects
4
PROJECT NAME STATUS
Creek Debris Removal Complete
Creek Sediment Removal Complete
Pond Sediment Removal Complete
Gee Creek at Moss Park Erosion Control
Countermeasures
Bid Documents
Underway

5. Gee
Creek
at
Moss
Park
NRCS
Project
5
Engineer’s Estimate of Probable Construction Cost: $810,000

6. Hazard Mitigation
Grant Program
(HMGP)
Projects
6

7. Hurricane Ian HMGP Applications
7
PROJECT NAME
oPublic Works Building Permanent Generator*
oElevation of 3 Flood-Prone Homes
oPolice Station Safe Room*
oAcquisition and Demolition of 1 Flood-Prone Home
oFloodproofing of 12 Sanitary Lift Stations
* Approved for funding by FEMA. Grant agreement with the City is currently being prepared by FDEM.

8. Hurricane Idalia HMGP Application
8
PROJECT NAME
oElevation of 1 Flood-Prone Home
Sample 4-ft Elevation – Front View Sample 4-ft Elevation – Back View

9. Tuskawilla Crossings
Subdivision Pond 1
Repairs and
Rehabilitation
9

10. Current Status
10
Submitted the permit modification to the St. Johns River Water
Management District (SJRWMD) on 05/24/2024 (Application No. 148395- 4).
A Request for Additional Information (RAI) letter was issued by the
SJRWMD on 06/21/2024.
Currently addressing the stormwater comments as well as the wetland
impacts.
Plan to resubmit to the SJRWMD in the near future.

11. Wetland Park
Outfall
Improvements
11

12. Current Status
12
Submitted the Permit Modification to the SJRWMD on 09/05/2024
(Application No. 22437-9).
Currently finalizing the Computer Modeling to address Water Quality and Impacts to Existing Upstream Stormwater Systems.

13. 13
Proposed Outfall
Improvements
Proposed Inlets
and Storm Pipes

14. Gee Creek /
No Name Creek
Watershed
Evaluation
14

15. Background
Information
15
After Hurricane Irma
(September 2017), CDM
prepared a report for the City
of Winter Springs entitled “Gee
Creek Flood Evaluation –
Conceptual Alternatives
Identification Report”

16. Background
Information
16
Recommended
Improvements:
Upsize Gee Creek culvert
crossing at Shore Road
Upsize Gee Creek culvert
crossing at Alton Road
Stabilize Gee Creek between
Shore Road and Gee Creek

17. Background Information
17
Unable to submit the Recommended Improvements as a HMGP
application under Hurricane Ian (due to lack of current watershed
model).
During Hurricane Ian (September 2022), Gee Creek at Shore Road
overtopped the right-of-way and caused significant impacts

18. Background Information
18
FEMA funded the restoration of the Gee Creek crossing at Shore
Road under the Public Assistance Program.
Recently, Seminole County has funded the following reports
related to Gee Creek / No Name Creek Watershed:
Task 2 – Assembly and Evaluation of Watershed Data
Task 3 – Stormwater Model Development

19. Background Information
19
Task 2 – Assembly and
Evaluation of Watershed
Data of Watershed Data
Task 3 – Stormwater
Model Development

20. SEMINOLE COUNTY WATERSHEDS
20

21. WINTER SPRINGS WATERSHEDS
21

22. 22
Source:
Gee Creek Flood Study
City of Winter Springs
(prepared by CDM Smith)

23. 23

24. 24
Sailfish Road and
Mockingbird Lane
24

25. No Name
Creek at
Alton Road
25

26. Current Status
26
The existing 60-inch corrugated metal pipe is at an adverse slope
(the downstream pipe invert is approximately 6 inches above the
upstream pipe invert)

27. Current Status 27
Upon Seminole County release of the Preliminary Computer
Model, Pegasus will evaluate Various Culvert Improvements to
Reduce Upstream Flood Stages and Minimize Downstream
Impacts.

28. 28

29. Questions and Answers
29
David W. Hamstra, P.E., CFM
Stormwater Department Manager
301 West State Road 434, Suite 309
Winter Springs, Florida 32708
Phone: [phone], ext. 309
E-mail: [email protected]