Moving Towards Ecosystem Restoration on the Cecil Webb Wildlife - - PowerPoint PPT Presentation

Moving Towards Ecosystem Restoration on the Cecil Webb Wildlife Management Area

Roger Copp, Water Science Associates Cason Pope, Florida Fish and Wildlife Conservation Commission March 28, 2017

Study Area and Flow Pathways

Problems

• Storage area for excess water from SW Cecil Webb WMA
• Flow-way from Cecil Webb across private lands between I-75

and Yucca Pens

What Do We Need?

• Too much water in southwest Cecil Webb WMA
• Restricted flows under I-75 due to lands on both sides of I-75

that have berms which have reduced flows to much lower levels

• Historic flow-ways have been blocked.
• Hydroperiod is too short in Yucca Pens Unit West of U.S. 41

Opportunities

• Farm blocking flow from Cecil Webb was available for

purchase (and was purchased) that can be use to store water

• FDOT needed a solution to a multi-million dollar stormwater

management challenge in widening I-75

• If all could cooperate, the farm could be their stormwater

management system

• Buying the farm reduces nutrient loads and peak flows to the

Caloosahatchee River estuary

• Lands west of I-75 could potentially benefit from cooperating

with the project

First, We Needed More Data

Thanks, FDOT, USGS, & FWC!

Constrictions Along I-75 North of Lee County Line

Railroad Constrictions

Largest Capacities at 6, 7, and 8 This culvert has flow

Railroad Culvert # 17 - Only Culvert That Flows

30” diameter

Wetlands West of RR #17 Constrict Flows

Railroad Trestle Bridge #8 – No Flow

• Inv. = 21.3 ft-NAVD

Berm Around McNew Property

Railroad Trestle Bridge #7 – No Flow

Topo in Vicinity of FDOT Br #7

There is an opening at #7, but there is no where for the water to go

Surveying of Additional Cross Sections was conducted

Status of Work to Date

• Major hydraulic features have been added to model
• Added more recent rainfall to coincide with newly collected

stage data in WMA

• Model calibrated and used for I-75 Widening Permit
• Proposed conditions

simulations have been conducted

• Portions of project are in

advanced stages of evaluation

• Bond Property being

designed for water storage

Original Concept

Proposed Wetland Mitigation Area

Elevation % of Site < 23 ft-NAVD 4 23 – 24 ft 40 24 – 25 ft 44 25 – 26 ft 11 > 26 ft 1 The existing site is a farm used for cattle grazing. An existing pump station at the south end of the site discharges stormwater to Gator Slough

Photos of Mitigation Site – Existing Condition 2012, pump on 2013, pump off

Ground elevation = 23.7 ft-NAVD The farm is maintained in a dry condition for cattle grazing. The site becomes very wet if the pumps are turned off

Other Components

• f Plan

SW Aggregate Mine is another place to store water and/or provide a pathway Landfill property west of US 41 has wetlands that could be part of the conveyance to Yucca Pens Potential Flow-way through McNew Property

Ecologic Assessment

• Assessment focused on SW

portion of Cecil Webb WMA

• Field work was conducted in Sept

2014

• Biological indicators were used to

evaluate habitat condition

• Hydraulic modeling was

conducted to evaluate restoration

• Combined info used to determine

mitigation potential

Large Area in Cecil Webb will benefit from the project

Simulated Response in Cecil Webb WMA

23 23.5 24 24.5 25 25.5 26 26.5 27 27.5 1/1/12 3/1/12 4/30/12 6/29/12 8/28/12 10/27/12 12/26/12 ft-NAVD

Simulated Water Levels, SW Cecil Webb WMA

Ground Elevation, Oak Hammock Ground Elevation, Marsh Existing Proposed

July 1 - Oct 31 Wet Season Water Level Drop = 1.5 ft

Results assume additional storage area is utilized beyond Bond Water Storage Facility.

Benefits of Project

• Purchase of the Bond Farm is the most critical component of

the Cecil Webb/Yucca Pens ecosystem restoration effort. Purchasing the farm will improve hunting habitat in both WMAs

• Reduces nutrient loads and wet season freshwater flows to

estuarine waters

• Reduces wetland impact and the cost of widening I-75

between Tuckers Grade and the Charlotte/Lee County line

• Reduces the wetland impact of the I-75 widening project
• Increases the potential of creating a water supply reservoir for

the City of Cape Coral. Cape Coral needs additional water so that the City can continue to develop.

Why this Project Has Been Successful

• Charlotte Flatwoods Initiative is a widely represented

stakeholder group that has worked together to achieve project objectives. Key partners:

– SFWMD – Florida Fish and Wildlife Conservation Commission (FWC) – FDOT – USGS – Charlotte Harbor National Estuary Program – SWFWMD – FDEP – Charlotte and Lee Counties – City of Cape Coral

Next Steps

• Complete design of Bond Property
• Secure funds for construction of water storage facility on Bond

Property

• Work is underway to evaluate Southwest Aggregates property to

store additional excess water from Cecil Webb WMA

• Conduct additional ecologic studies of Cecil Webb and Yucca Pens

to determine hydroperiod needs for both WMAs

• Continue to identify win-win-win solutions with partners to achieve

common goals

• Additional modeling analysis, preliminary design, obtaining funds,

final design, and permitting