2. Project Background
• Florida Power and Light (FPL), an energy
company, constructing a 230 kV transmission
line.
• The proposed route starts in Manatee County,
Florida and ends at a proposed substation in
Sarasota County, Florida and encompasses a
total of 6,566 acres.
• The survey and right-of-way acquisition phase
was completed in 2009.
• Analysis of the survey and right of way
acquisition phase is the focus of this project.
3. Project Analysis Objective:
Choosing a route that is both economical and minimally invasive to the community and environment.
Define and Quantify environmentally sensitive lands affected by transmission line:
Conservation Lands
National Wetlands Inventory
Quantify Homes within proximity of the transmission line:
Homes within the preferred corridor.
Homes within a 400 foot buffer of preferred corridor.
Define Schools and Daycares within proximity of transmission line:
Within preferred corridor
Within 400 foot buffer from corridor.
Quantify length and cost of transmission line.
4. Justification for Using GIS
GIS provides a visual interpretation of results that are easy for the audience to
understand.
A smart map that allows us to link data to actual geographic locations and visualize
how these data relate to other aspects.
A powerful tool for accurately calculating analysis results.
5. Data Sources & Datasets
Data Sources
• ESRI
• Florida Geographic Data Library
• Labins.org
• University of West Florida
Data Sets
• County Boundaries
• Major Roads
• Quad Aerials
• National Wetlands Inventory
• Conservation Lands
• Florida Schools & Daycares
• Preferred Transmission
Corridor
6. Total Conservation Sites Within Study Area :
9 Sites
Total Conservation Acreage Within Study Area:
14,302.23 acres
Total Conservation Sites Directly Impacted by Corridor:
3 Sites
Total Conservation Acreage Directly Impacted by
Corridor:
163.44 acres
Conservation Lands Analysis
7. Wetlands
Inventory
Total # in
Study Area
Total Acres Study
Area
Total Percentage
Wetlands 3,329 19,054.01 13.9%
Uplands 74 118,666.38 86.1%
Total 3,403 137,720.39 100%
Wetlands
Inventory
Total # in
Corridor
Total Acres in
Corridor
Total Percentage
Wetlands 196 914.09 14%
Uplands 5 5,652.23 86%
Total 201 6,566.32 100%
Wetlands Analysis
8. Wetlands Analysis
Wetlands & Uplands in Study Area
Wetlands
Inventory
Total # in
Study Area
Total Acres Study
Area
Total Percentage
Wetlands 3,329 19,054.01 13.9%
Uplands 74 118,666.38 86.1%
Total 3,403 137,720.39 100%
Wetlands
Inventory
Total # in
Corridor
Total Acres in
Corridor
Total Percentage
Wetlands 196 914.09 14%
Uplands 5 5,652.23 86%
Total 201 6,566.32 100%
9. Analysis of Homes
Within Preferred Corridor: 21
Within 400 foot Buffer From Corridor: 66
Total Potential Homes Affected: 87
Parcels In Proximity to Transmission Line
County Parcels
Within
Corridor
Parcels Within
400 ft Buffer
Total Parcels
Sarasota
County
30 53 83
Manatee
County
132 202 334
Total 162 255 417
10. There were no schools or daycares located
within the preferred corridor or within the 400
foot buffer extending from the corridor.
Analysis of Schools and Daycares
11. Length & Cost of Transmission Line:
• 25 miles down the centerline of the preferred corridor
• Range of Cost = $41,250,000.00 to $67,500,000
Cost Formula:
Unit Cost per Mile x Length (miles) x Urban Factor
Type of Line Unit Cost Length Urban
Factor
Cost
230kV Single
Circuit, Tubular
Steel Pole
$1,100,000 25 1.5 $41,250,000
230kV double
circuit, double
strung on both
sides
$1,800,000 25 1.5 $67,500,000
12. Conclusion
The transmission line preferred corridor location:
• Covers 25 miles and 6,566.07 total acres.
• Avoids schools and daycares
• Directly impacts approximately 87 homes, a relatively low number
• Affects 417 parcels or landowners
• Directly Impacts:
914 acres of wetlands or 14% out of the total 19,054 acres within the study
area
3 conservation area sites comprising 163 acres out of a total of 9 conservation
sites totaling 14,302 acres within the study area.
• Can be constructed at a cost of $41,250,000.00 to $67,500,000.
13. Limitations of Data
Limitations regarding this project analysis include digitizing of homes from the aerial
maps provided by UWF which were downloaded from Labins.org.
It was difficult to distinguish the homes/rooftops from commercial buildings, sheds
or storage buildings.
Including information or datasets from the county tax office that include a
breakdown of actual residences may improve the reliability of information regarding
the homes within the corridor and within the 400 foot boundary.
15. References
Ng, Peter. (2009). Draft unit cost guide for transmission lines. [Powerpoint slides].
Retrieved April 28, 2016 from http://www.caiso.com/2360/23609c2864470.pdf.
