(1) The purpose
of this rule is to provide the small forestland owner minimum option
prescription for vegetation retention in Eastern Oregon riparian areas, as
shown in Table 4.
Table 4: Eastern Oregon Small Forestland Owner Minimum
Option Vegetation Retention Riparian Management Area Distances
|
Stream Type
|
Large
|
Medium
|
Small
|
Upstream
distance1
|
|
Inner
|
Outer
2
|
Inner
|
Outer
2
|
Inner
|
Outer
2
|
|
|
Type F or Type SSBT
|
30
|
70
|
30
|
50
|
30
|
30
|
N/A
|
|
Type N
|
30
|
45
|
30
|
30
|
-
|
-
|
|
|
Type Np, Terminal
|
-
|
-
|
-
|
-
|
20
|
20
|
RH Max = 500 feet
|
|
Type Np, Lateral
|
-
|
-
|
-
|
-
|
20
|
N/A
|
250 feet
|
|
Type D
|
30
|
|
30
|
|
20
|
|
See OAR
629-643-0150
|
1 Upstream distance from either Type
F or Type SSBT
2 Outer Zone shall retain 60 square
feet of basal area per acre; apply OAR
629-643-0120
3 OAR
629-643-0143 describes all Type
Np riparian vegetation requirements
(2) The small forestland owner shall apply
the vegetation retention requirements to the riparian management areas of
Eastern Oregon Type F, Type SSBT, and Type N streams.
(3) All other requirements for the standard
practice prescription rules shall apply.
(4) Both the small forestland owner minimum
option and the standard practice prescriptions and riparian management widths
apply to Type N streams depending on whether the stream classification is
perennial (Np) or seasonal (Ns). The State Forester shall determine the
classification of a Type N stream as Np or Ns following the process described
in OAR
629-635-0200(18).
(a) To apply the appropriate vegetation
requirements as described in Tables 2 and 4, a small Type Np stream shall be
classified as either terminal or lateral.
(b) The State Forester shall provide these
maps that show the stream classification that identify the small Type Np
streams.
Table 2: Eastern Oregon Standard Practice Vegetation
Retention Riparian Management Area Distances
|
Stream Type
|
Large
|
Medium
|
Small
|
Upstream
distance1
|
|
Inner
|
Outer
2
|
Inner
|
Outer
2
|
Inner
|
Outer
2
|
|
|
Type F or Type SSBT
|
30
|
70
|
30
|
70
|
30
|
45
|
-
|
|
Type N
|
30
|
45
|
30
|
45
|
-
|
-
|
-
|
|
Type Np,
Terminal
|
|
|
|
|
30
|
30
|
RH Max = 500 feet
|
|
Type Np,
Lateral
|
|
|
|
|
30
|
N/A
|
RH Max = 250 feet
|
|
Type D
|
30
|
-
|
30
|
-
|
30 or 20
feet3
|
-
|
See OAR
629-643-0150
|
1 Upstream distance from either Type
F or Type SSBT
2 Outer Zone shall retain 60 square
feet of basal area per acre; apply OAR
629-643-0120
3 20 feet outside of Type Np
vegetation retention requirements
(5) For all Type F, Type SSBT, and large and
medium Type N streams, the small forestland owner shall:
(a) Retain all trees and vegetation within
the inner zone.
(b) Retain all trees
leaning over the channel.
(A) For the outer
zone, a minimum of 60 square feet of basal area per acre beyond the 30-foot
inner zone, using the distances shown for the stream size described in Table 4.
The small forestland owner shall measure the outer zone starting from the edge
of the inner zone. To meet the basal area target requirement, the small
forestland owner shall retain 27 trees from the largest diameter class per
acre.
(B) The remainder of the
trees shall consist of trees greater than eight inches DBH.
(C) When present, retained species shall
consist of ponderosa pine, Douglas-fir, Western larch, hardwoods, and other
species that are considered fire-resilient.
(D) Retained trees shall be well distributed
within the outer zone unless limited by existing site or stand
conditions.
(E) Notwithstanding (A)
through (D) above, the distribution, species, and size of retained trees shall
be left on site in such a way that promotes fire resiliency and overall stand
health, and shall be described in the written plan.
(c) The small forestland owner shall adhere
to an ELZ in the outer zone for 30 feet, extending from the outer edge of the
inner zone.
(6) For small
terminal Type Np streams flowing into a Type F or Type SSBT stream, the small
forestland owner shall retain:
(a) All trees
within 20 feet from the edge of the active channel for a maximum distance of
500 feet upstream of the Type F stream, defined as the inner zone. The total
distance of the tree retention area above the confluence shall be determined
according to the process in OAR
629-643-0143.
(b) All trees leaning over the
channel.
(c) Trees outside of 20
feet and at 40 feet from the edge of the active channel, defined as the outer
zone. The outer zone retention requirements shall apply upstream for the same
distance as required in (a) as follows:
(A) A
minimum of 60 square feet of basal area per acre beyond the 20-foot inner zone
and the distances shown in Table 4.
(B) To meet the basal area target
requirement, the small forestland owner shall retain 27 trees from the largest
diameter class per acre.
(C) The
remainder of the trees shall consist of trees greater than eight inches
DBH.
(D) When present, retained
species shall consist of ponderosa pine, Douglas-fir, Western larch, hardwoods,
and other species that are considered fire-resilient.
(E) Retained trees shall be well distributed
within the outer zone limited by existing site or stand conditions.
(F) Notwithstanding (A) through (E) above,
the distribution, species, and size of retained trees shall be left on site in
such a way that promotes fire resiliency and overall stand health.
(d) The small forestland owner
shall adhere to an R-ELZ or ELZ extending from the edge of the inner zone,
extending the same distance as the distance determined in (a) as required in
OAR
629-643-0143.
(e) The small forestland owner shall adhere
to an ELZ upstream of the tree retention area for the remainder of the Type N
channel.
(7) For small
lateral Type Np streams flowing into a Type F or Type SSBT stream, the small
forestland owner shall retain all trees within 20 feet from the edge of the
active channel for a maximum distance of 250 feet upstream of the confluence
with the Type F or Type SSBT stream.
(a) The
small forestland owner shall determine the total distance of the tree retention
area above the confluence as described in OAR
629-643-0143.
(b) The small forestland owner shall adhere
to an R-ELZ or ELZ extending 50 feet from the edge of the active channel. The
operator shall extend the R-ELZ or ELZ the same distance as the distance
determined in (a), as required in OAR
629-643-0143.
(c) The small forestland owner shall adhere
to an ELZ upstream of the tree retention area and for the remainder of the Type
N channel.
(8) For a
small Type Ns stream, the small forestland owner shall retain all shrubs and
trees under six inches DBH within 30 feet of the active channel or channel
migration zone, and for 750 feet upstream of the confluence with the Type F or
Type SSBT stream. The small forestland owner shall adhere to an ELZ from the
edge of the active channel for the entire Type N stream.
(9) For Type Np and Type Ns streams outside
the tree retention area described in this rule, the small forestland owner
shall follow all other Type N ELZ standard practice requirements in OAR
629-643-0120.
(10) For all Type F, Type SSBT, and Type N
streams, retained trees in the outer zone in Table 4 that otherwise meet the
wildlife leave trees requirements may be counted toward wildlife leave trees
requirements within harvest type 2 or harvest type 3 units, pursuant to ORS
527.676. Trees in the forest
conservation tax credit may be counted toward these requirements.
