Ill. Admin. Code tit. 62, § 1816.117 - Revegetation: Tree, Shrub, and Herbaceous Wildlife Vegetation
a) For areas to be developed for fish and
wildlife habitat (including shelter belts), recreation, or forest products land
uses, success of vegetation shall be determined on the basis of tree and shrub
population and vegetative ground cover. Such parameters are described as
follows:
1) Trees and shrubs that will be used
in determining the success of vegetation and the adequacy of plant arrangement
shall have utility for the approved post-mining land use. Tree and/or shrub
population shall be considered successful if it meets the population required
in subsection (b) with 90% statistical confidence (i.e., one-sided t test with
a 0.10 alpha error) during the fifth year of the responsibility period or later
in the responsibility period. On lands eligible for remining, the period of
responsibility shall be 2 full years. Trees and shrubs counted in determining
such success shall be healthy, e.g., not demonstrating abnormal growth,
coloring, leaf drop or disease. At the time of bond release such trees and
shrubs shall be alive, and shall have been in place for at least 3 growing
seasons, i.e. 3 years. On lands eligible for remining, trees and shrubs need
not have been in place for 3 years; however, such trees and shrubs shall not be
counted in determining success during the same calendar year in which they were
planted.
2) Vegetative ground cover
shall not be less than required to achieve the approved post-mining land use
and shall be adequate to control erosion and shall not be less than 70% during
the last year of the responsibility period.
3) Permanent roads, parking lots and similar
impervious structures on the revegetated area shall not require the planting of
trees and shrubs or herbaceous ground cover. Erosion control structures,
including pond embankments, shall not require the planting of trees and
shrubs.
4) For purposes of this
Section, herbaceous species means grasses, legumes and nonleguminous forbs;
woody plants means woody shrubs, trees and vines; and ground cover means the
area of ground covered by the combined above ground parts of vegetation and the
litter that is produced naturally on site.
5) For purposes of this Section, normal
husbandry and conservation practices shall include pruning, disease, pest,
vermin and herbaceous vegetation control including mowing, replanting, and rill
and gully repairs. The replanting of trees and shrubs in areas described in
Section 1816.116(a)(2)(C) shall be limited to 20% of the original approved
planting rate during the first year of the responsibility period and 10% of the
original approved planting rate during the second year of the responsibility
period. The repair of rills and gullies shall be limited to those approved as a
normal conservation practice under Section 1816.116(a)(2)(C), (D) and
(E).
b) For areas where
woody plants are used for fish and wildlife habitat (including shelter belts),
or recreation land uses, the area shall have a minimum population of 250 trees
or shrubs per acre. Planting arrangements such as hedgerows, border plantings,
clump plantings, shelterbelts, and open herbaceous areas which increase
diversity within wildlife areas may be approved by the Department on a
case-by-case basis prior to planting such areas. Where woody plants are used
for forest products land uses, the area shall have a minimum population of 450
trees or shrubs per acre.
c) For
areas planted to trees or shrubs including wildlife habitat (including shelter
belts), recreation, and forest products land uses, the sampling procedure for
measuring populations is described as follows:
1) The permittee shall submit a scale drawing
or aerial photograph delineating the fields to be sampled and the total number
of acres in each field. A one inch equals 500 (1:500) feet or larger scale
shall be used. Once field boundaries are established in a submittal, the
boundaries shall not be changed unless the Department approves a request in
accordance with 62 Ill. Adm. Code 1774.13.
2) One of the following circular plot sizes
shall be selected by the sample enumerator:
Plot Size/Acres |
Radius/Feet |
1/160 |
|
1/120 |
|
1/100 |
|
1/90 |
|
1/80 |
|
1/70 |
|
1/60 |
|
1/50 |
|
1/40 |
|
1/30 |
|
1/20 |
|
1/10 |
|
1/5 |
|
1/4 |
3) The
number of plots needed to sample 2.5 % of the area will be calculated employing
the following formula:
Number of Plots equals 2.5% multiplied by Sample Area in acres divided by plot size.
4)
Based on the number of plots needed to be sampled and plot size, locate
transect lines an equal distance apart throughout the area to be sampled.
Position individual plots an equal distance apart along transect lines.
Determine the total length of all transect lines combined and then divide by
the total number of plots needed to be sampled. When an individual plot is
positioned within 60 feet of the boundary of the area to be sampled, the
location of the plot shall be moved perpendicular to the transect line until
the plot is 60 feet from the boundary of the area to be sampled or the greatest
distance possible where 60 feet cannot be achieved.
5) Sample each plot for compliance with
subsections (a)(1) and (b) and record live trees and/or shrubs and
species.
6) Calculate population
levels as follows:
A) Average number of live
trees and/or shrubs per plot equals total number of live trees and/or shrubs
divided by number of plots; and
B)
Number of live trees and/or shrubs per acre equals average number of live trees
and/or shrubs per plot multiplied by plot size denominator.
7) Representatives of the
Department shall administer all sampling.
d) Vegetative ground cover shall be measured
by the following technique:
1) Twenty random
points shall be identified in the area to be tested.
2) A 20 feet engineer's tape shall be
extended directly south of each point. If the tape extends beyond the boundary
of the area to be tested or extends into an area where herbaceous ground cover
has been controlled with herbicides to minimize competition with woody plants,
the tape shall be rotated in 90 degree increments until the entire 20 feet
length is within the boundary of the area to be tested or area not treated with
the herbicide.
3) A measurement
shall be taken at each .2 foot increment directly above or below the
tape.
4) Ground cover shall be
determined to be present if any vegetation identified in subsection (a)(4) is
measured at the increment.
5) A
percentage of ground cover shall be established for the area tested by taking
the total number of measurements where ground cover was determined to be
present.
e) For areas
where herbaceous vegetation plants are used for fish and wildlife habitat
(including shelterbelts), or recreation land uses, vegetative ground cover of
approved species shall not be less than required to achieve the approved
post-mining land use and shall be adequate to control erosion and shall not be
less than 70% during the last year of the responsibility period. Planting
arrangements such as hedgerows, border plantings, clump plantings,
shelterbelts, and open herbaceous areas that increase diversity within wildlife
areas may be approved by the Department on a case-by-case basis prior to
planting those areas.
Notes
Amended at 26 Ill. Reg. 4232, effective March 6, 2002
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