Compensatory Mitigation Credit Calculator

Factor Method 1 Method 2 Method 3 Method 4 Notes
Mitigation method What method(s) of mitigation are proposed? Select an option from drop-down list. Use multiple methods if more than one ratio applies. Credits for preservation are case-by-case, as determined by the Department and may be adjusted.
Functional temporal loss (increase factor) Which soil factor, if any will cause temporal loss of function? Select first applicable option from drop-down list. Soil adjustment factors are not generally applicable to removal of historic fill, or mitigation through preservation.
Adjusted mitigation ratio (acres per credit).
Applicable site acreage
Potential mitigation credits
Potential mitigation credits without buffers
Credit for Buffers Buffer acreage Use multiple methods if more than one ratio applies
Buffer credit ratio DSL will determine the credit ratio for required buffers. Enter the buffer credit ratio divisor (for 1-acre of buffer DSL typically divides by 10 to derive buffer credit allotments)
Buffer Credit
Potential Mitigation Credits With Buffer Credits

Author: John Marshall

NOTE: This web application uses the same arithmetic and logic to provide mitigation bank and in-lieu-fee credit estimates used in the Oregon Department of State Lands (DSL) Excel spreadsheet provided in the hyperlink below in this web page. The only difference is that on the dropdown selection for mitigation type in this application a credit / acres ratio of 1.5:1 for creation is used instead of 1:1 as used in the DSL spreadsheet. The former ratio of 1.5:1 is what has been used by most of the mitigation banks in Oregon up until recently. However, the user is not required to use the default dropdown values and can insert any value desired as a substitute. While using the defaults provided by DSL will more likely result in a similar conclusion on the credits eligible for authorization and release by the agency, DSL reserves discretionary authority to alter their defaults. Therefore calculators such as these should only be considered as credit estimators of a given bank's actual authorized credit allotment.