ILLINOIS REGISTER 3105
09
DEPARTMENT OF NATURAL RESOURCES
NOTICE OF PROPOSED AMENDMENTS
All Plans shall include a description of soil features. Information may be generalized over the
property when soil conditions are uniform or addressed on a stand-by-stand basis. The
description shall include the soil series, drainage, associated topography and other pertinent
properties, particularly as they relate to management limitations or site productivity.
(Source: Added at 33 Ill. Reg. ______, effective ____________)
Section 1537.20 Description of Forest Types to be Managed
a) A description is required for eachof the present forest stand withstands and the
conditions that created the existing stand structure. Minimum stand descriptions
must include: forest cover/site/natural community, acreage, stand condition,
species composition, size classes, basal area/acre, trees/acre (or stand tables),
volume/acre (or stocking tables), stocking advance regeneration, whether the
main canopy is even-aged or uneven-aged, timber quality, and timber production
potential. All information presented should be adequately explained and
interpreted, species composition, forest cover types and/or forest site-types, and
whether the main canopy stand is even-aged or all-aged.
b) An inventory of the forest stands shall be conducted in accordance with the
procedure outlined in the Illinois Forest Inventory Data Processing systemSystem
(IFIDP) or alternative inventory procedureany other procedures which will be
approved by the Department, provided the criteria for accuracy are met. Criteria
for accuracy are: provided the criteria for accuracy are met. The IFIDP procedure
is filed in all Division of Forest Resource, DNR District Offices and available to
the public for review. Trees from 2" DBH should be included in the inventory
and accuracy should be + or - ±10% of the basal area/acre and ± 20% of the
volume/area at the 66% confidence level. The IFIDP procedure and software are
available in all IDNR Forestry offices for public review. All trees greater than or
equal to 2-inch DBH must be included in the inventory. The inventory described
is not required for stands less than 5 acres. Stand volumes should be clearly
emphasized to the landowner, whether or not the data are sufficient for sale
purposes.
c) All inventoryInventory and field data must be delivered withto the Plan to the
IDNRDistrict Forester for review. The IDNR Foresterreview will determine if all
of the information required inventory data arefor the plan is present, complete,
and meetmeets accuracy requirements (+ or - 10% of the basal area at the 66%
confidence level).
Electronic Documents of Illinois
