Draft Compensatory Mitigation Eligibility and Accounting Determination Form

Step 2. Accounting

INSTRUCTIONS: This accounting worksheet is used to estimate a permittee's wetland mitigation requirements, specific to a particular impact and proposed mitigation site. There are no minimum requirements for streams. Final requirements will be determined by the agency. Requirements are based on (1) the mitigation method, (2) function / value replacement achieved, (3) functional temporal loss factors, (4) level of function replacement, and (5) stewardship and site protection plans. Enter data in boxes in cyan table cells only. Boxes in yellow table cells will populate automatically. A separate column must be used for each mitigation method used (e.g. if a mitigation site includes both restoration and enhancement, the mitigation method for those distinct areas must be calculated in separate columns). A separate column may also be used to allow different function temporal loss factors to be applied to different acreages, even if the mitigation method being used on that acreage is the same.

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Permittee Responsible Mitigation 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. If purchasing credits, ILF or PIL, select "credit purchase." Minimum requirements for preservation and non-wetland waters are case-by-case, as determined by the Department.
MINIMUM MITIGATION REQUIREMENT (acres of mitigation required per acre of impact)
Specific function and value replacement (increase factor) How many specific functions and values from the impact site are replaced at the mitigation site? * Compare OWRAP ratings between the impact site and the mitigation site (predicted scores) to determine this. Select an option from drop-down list. Select "Not applicable" if the mitigation site is approved/seeking approval as an exception to an in-kind replacement under a watershed priority approach, if purchasing legacy credits, or best professional judgement was used to assess function and values.
Functional temporal loss (increase factor) Which factor if any will cause the greatest temporal loss of function? * Select first applicable option from the drop-down-list. Soil adjustment factors are not applicable to credit purchases or approval of historic fill. Vegetation and soil adjustments may not apply when the mitigation method is preservation.
High level of function replacement (decrease factor) Does the CM site exceed at least 80% of the specific functions being lost at the impact site? Compare OWRAP function ratings between the impact site and the mitigation site (predicted scores) to determine this. Select an option from drop-down list. "Exceed" means replaced beyond an overlapping rating break proximity. Select "Not applicable" if the mitigation site is approved/seeking approval as an exception to an in-kind replacement under a watershed priority approach, if purchasing legacy credits, or best professional judgement was used to assess functions and values.
Mitigation site protection and stewardship (decrease factor) What level of site protection and stewardship is proposed for the mitigation site? Select an option from the drop-down list. Mitigation banks and ILFs typically have enhanced stewardship. Minimum mitigation requirement is 1 acre credit to one acre of impact.
Total adjustment (percent increase)
ADJUSTED MITIGATION REQUIREMENT (acres of mitigation required per acre of impact)
Method 1 Method 2 Method 3 Method 4 Notes
Acreage of inpact (enter the acreage associated with each method) Insert the area of unavoidable permanent impact.
MITIGATION ACREAGE REQUIRED (adjusted mitigation requirement * impacted acreage)
MITIGATION ACREAGE REQUIRED WITHOUT BUFFERS This is the mitigation acreage required if a buffer is not required by DSL.
This section is only used if DSL requires a buffer at the compensatory mitigation project
Factor Method 1 Method 2 Method 3 Method 4 Notes
Credit for DSL Required Buffers Buffer acreage Use multiple methods only if more than one ration will be applied to the buffer.
Buffer credit ratio DSL will determine the crdit ratio for required buffers. Enter the acres of buffer required per credit (e.g. for 10:1, enter 10).
Buffer credit
Total Buffer credit
TOTAL MITIGATION REQUIRED WITH BUFFER CREDITS APPLIED This is the mitigation acreage if there are buffers required by DSL

Author: John Marshall

NOTE: This web application uses the same arithmetic and logic to provide permittee provided mitigation estimates used in the Oregon Department of State Lands (DSL) Excel spreadsheet provided in the hyperlink above the one you used to access 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 ODSL spreadsheet. The former ratio of 1.5:1 is what has been used by most of the mitigation transactions 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 mitigation requirements by DSL, DSL also reserves discretionary authority to alter the defaults. Therefore calculators such as these should only be considered as estimators of a given DSL mitigation requirement.

Modified DSL Mitigation Eligibility Workbook

Modified DSL Mitigation Bank Crediting Workbook

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