1997-06-13_REPORT - M1981302 ‎(18)‎

• Permit No: M1981302
• IBM Index Class Name: Report
• Doc Date: 6/13/1997
• Doc Name: EXHIBIT A STATUS REPORT ON ZAPUS HUDSONIUS PREBLEI A CANDIDATE ENDANGERED SUBSPECIES
• Media Type: D
• Archive: No

b. Fort St- Vrain Nuclear Generating Station- As a precaution,
management of the irrigation canal should involve minimizing
human disturbance and livestock grazing in a buffer zone of at
least 400 feet either side of the canal midline. This buffer zone
should effectively allow the growth and maintenance of dense,
tall, grassy vegetation required by this subspecies. Buffer strips
could be managed along other canals and waterways within the
buffer zone of the station. However, it should be noted that a
low level of grazing may not adversely impact this subspecies.
C. City of Boulder Open Space: Tracy Collins parcel- As a
precaution, management of the Coal Creek drainage should
involve minimizing human disturbance and livestock grazing in
a buffer zone of at least 400 feet either side of the creek midline.
This buffer zone should effectively allow the growth and
maintenance of native vegetational structure required by this
subspecies. However, it should be noted that a low level of
grazing may not adversely impact this subspecies.
d. City of Boulder Open Space: VanVleet parcel- The current
agricultural activities performed on the VanVleet parcel include
the harvesting of hay in the autumn, and use of the parcel as
winter pasture for livestock. These activities do not necessarily
threaten critical habitat for Z. h. preblei. Harvesting of hay
should take place after the presumed period of hibernation of this
subspecies (i.e., after mid-October). The use of the land as
winter pasture should not impact this subspecies, as it is believed
to remain in hibernation, usually well underground, until early
April.
4. Publicity/sensitivity- Same as for 3.D. above.
S. Other recommendations- None
B. Monitoring activities and further studies recommended
1. Rocky Flats Plant- It is recommended that live-trapping studies continue
at the Plant to determine the status of the population inhabiting the
Woman Creek drainage.
2. Fort St. Vrain Nuclear Generating Station- As above, it is
recommended that further live-trapping studies occur on station lands to
determine the existence and location of subspecies populations.
3. City of Boulder Open Space: Tracy Collins parcel- As above, it is
recommended that further live-trapping studies occur along Coal Creek,
possibly extending outside the Tracy Collins parcel, to identify the
locations of any populations of Z. h. preblei.
4. City of Boulder Open Space: VanVleet parcel- As above, it is
recommended that an extensive live-trapping study be performed on the
VanVleet parcel and adjacent parcels of Open Space land (i.e., Burke 1,
Burke II, and parcels to the south) to determine the precise locations of
subspecies populations and associated areas of critical habitat.
5. Other- A thorough survey should be conducted throughout the historical
range of this subspecies to identify potential critical habitat areas (5
contiguous acres or more). Once identified, a thorough live-trapping
study should be conducted in each area of potential critical habitat to
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