HomeMy WebLinkAbout2024 09 23 Awards and Presentations 100 - Gee Creek Update PresentationAWARDS AND PRESENTATIONS ITEM 100
CITY COMMISSION AGENDA | SEPTEMBER 23, 2024 REGULAR MEETING
TITLE
Gee Creek Update Presentation
SUMMARY
Due to ongoing concerns in the low-lying areas of the Gee Creek Basin the City's
Engineering Consultant will provide an update to ongoing measures to assist in the
occasional flooding experienced by the residents and the ongoing drainage study.
FUNDING SOURCE
RECOMMENDATION
A presentation will be provided by Pegasus Engineering on the Gee Creek Basin
6
STORMWATER BRIEFING #4
City Commission Meeting
September 23, 2024
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
Hurricane Ian
Grant Funded
NRCS Projects
3
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
Gee
Creek
at
Moss
Park
NRCS
Project
5
Engineer’s Estimate of Probable Construction Cost: $810,000
Hazard Mitigation
Grant Program
(HMGP)
Projects
6
Hurricane Ian HMGP Applications
7
PROJECT NAME
o Public Works Building Permanent Generator*
o Elevation of 3 Flood-Prone Homes
o Police Station Safe Room*
o Acquisition and Demolition of 1 Flood-Prone Home
o Floodproofing of 12 Sanitary Lift Stations
* Approved for funding by FEMA. Grant agreement with the City is currently being prepared by FDEM.
Hurricane Idalia HMGP Application
8
PROJECT NAME
o Elevation of 1 Flood-Prone Home
Sample 4-ft Elevation – Front View Sample 4-ft Elevation – Back View
Tuskawilla Crossings
Subdivision Pond 1
Repairs and
Rehabilitation
9
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.
Wetland Park
Outfall
Improvements
11
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
Proposed Outfall
Improvements
Proposed Inlets
and Storm Pipes
Gee Creek /
No Name Creek
Watershed
Evaluation
14
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”
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
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
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
Background Information
19
Task 2 – Assembly and
Evaluation of Watershed
Data of Watershed Data
Task 3 – Stormwater
Model Development
SEMINOLE COUNTY WATERSHEDS
20
WINTER SPRINGS WATERSHEDS
21
22
Source:
Gee Creek Flood Study
City of Winter Springs
(prepared by CDM Smith)
23
24
Sailfish Road and
Mockingbird Lane
24
No Name
Creek at
Alton Road
25
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)
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
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: 407-992-9160, ext. 309
E-mail: david@pegasusengineering.net