Title: A Wetland Evaluation Method for The Everglades: Impact to Mitigation, Table 2: Mitigation Ratio Values
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Permanent Link: http://ufdc.ufl.edu/WL00001296/00001
 Material Information
Title: A Wetland Evaluation Method for The Everglades: Impact to Mitigation, Table 2: Mitigation Ratio Values
Physical Description: Book
Language: English
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Spatial Coverage: North America -- United States of America -- Florida
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Abstract: A Wetland Evaluation Method for The Everglades: Impact to Mitigation, Table 2: Mitigation Ratio Values
General Note: Box 8, Folder 3 ( Vail Conference, 1993 - 1993 ), Item 10
Funding: Digitized by the Legal Technology Institute in the Levin College of Law at the University of Florida.
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Bibliographic ID: WL00001296
Volume ID: VID00001
Source Institution: Levin College of Law, University of Florida
Holding Location: Levin College of Law, University of Florida
Rights Management: All rights reserved by the source institution and holding location.

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Table 2. Mitigation Ratio Values (R): For conversion of project impact WFV to required mitigation credit WFV



Mitigation approach and original Mitigation Timing:
wetland type impacted
wetland type i d In Advance Concurrent After-the-fact

1. Restoration or enhancement:

a. herbaceous 1.00 1.09 1.36
b. forested, cypress dominated
133 1.45 1.82
c. forested, non-cypress dominated
1.67 1.82 2.27
2. Creation:
a. herbaceous 1.00 1.20 1.50
b. forested, cypress dominated
133 1.60 2.00
c. forested, non-cypress dominated
1.67 2.00 2.50

Explanation of basis:

The values in this table began with two extremes. First, the lowest value of 1.00 for restoration/enhancement
of a herbaceous wetland, in advance, was based on the ability to demonstrate and guarantee success prior to the
authorized impact. This situation provides a net environmental benefit due to the existence of both wetlands
simultaneously, for at least some period of time. The other extreme-the set of values for the creation after-the-
fact-were taken from the South Florida Water Management District's isolated wetland mitigation ratios
(SFWMD Permit Information Manual, Volume IV, Management and Storage of Surface Waters, Appendix 7,
section 5.1.2, Nov. 1987). The ratios of those values to one another also served to established the analogous
ratios within the other five cells in the table.

Except for timing "in advance", the relationship between created wetlands and the analogous
restoration/enhancement categories was set at 1.1. For "in advance" it was decided that the ability to
demonstrate success prior to impact should make the creation and analogous restoration/enhancement categories
equal. Last, it was decided that the step between "after-the-fact" and "concurrent" should be substantially larger
than the step between "in advance" and "concurrent". A factor of 1.25 was arbitrarily selected for the step
between "after-the-fact" and "concurrent", leaving the step of 1.09 between "concurrent" and "in advance" for
restoration/enhancement. The analogous steps for creation are larger (a factor of 1.2) because creation in
advance was not initially "penalized" as explained above.




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