HomeMy WebLinkAboutY5MR 8013320032022 ANNUAL MONITORING REPORT FOR CASP Mitigation for Septic Permit
June 2, 2022
"Reinertsen Property" owned by Northwest Watershed Institute
Parcel No. 801332003
2981 Dabob Road
Quilcene, WA 98376
Septic Permit SEP16-00082
By Peter Bahls, Aquatic Ecologist
Northwest Watershed Institute
Peter@ nwwatershed.org
June 1, 2022 MITIGATION SITE PLANT MONITORING DATA (2022 MONITORING REPORT)
Plant species
Sitka spruce
Grand fir
Western red cedar
Red flowering current
Pacific Crabapple
Bigleaf maple
Red osier dogwood
Snowberry
Nootka rose
Oregon grape tall
Red alder
Willow
Bitter cherry
TOTAL
Survival - percent of [ASP
Objective (103 plants) alive
Height (ft) of each plant counted in mitigation area
12 5
6354867676272108
86748422
546566565
4
3 5
3 64
4333533333334 4443333.24343
4 434234333 -` I I 1
22213431 j
4 7
. IFF31
Ave.
2019
2019
2021
2021 2022 height
March"
June
April
July June (ft)
2
2
2
2F
2r 8.5
16
16
16
15 r
15 Pr 5.8
10
10
10
7 r
8 F 5.1
9
10
11
9 r
9 pr 5.3
1
2
1
1V
1r 4.0
4
4
3
3V
2r 4.0
5
5
4
3r
3F 4.3
24
24
23
26 rr
25 Pr 3.3
10
11
9
7 r
10 r 3.3
10
11
8
8 r
8 F 2.3
16
4
2
2Pr
2F 5.5
0 1 1 1� 1' 7.0
0 0 1 1 1 r 3.0
107 100 91 85 87
97 1 88.3 82.5 84.5
MANAGEMENT ACTIONS AT MITIGATION SITE
September 2016, Preparation of site, hand removal of cork elm and blackberry, spray knotweed
February 2017 Initial planting of 23 plants at Plant-A-Thon, mulching
June 2017 Hand weeding
August 2017 Spray knotweed
March 2018 Supplemental planting to 38 plants and handweeding
August 2018 Hand weeding and knotweed and cork elm spray
March 2019 Hand weeding blackbery and cork elm and plant out to 107 plants
June 2019 Weed whack
March 2020 Weed whack blackberries
July 2021 Weed whack teasel and blackberry
June 2022 Weed whack grass and a few blackberry
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VA
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`why n
Figure 1. Photo -point 1, north half of mitigation site, June 1, 2022
ell
Figure 2. Photo -point 2, south half of mitigation site, June 1, 2022
Figure 3. Photo -point 3, SW corner of mitigation site (standing), June 1, 2022
Figure 4. Photo -point 4, SW corner of mitigation site (squatting), June 1, 2022
Summary and Management Recommendations
The objective for the revegetation is at least 80% survival of 103 native species specified in the
June 2016 CASP Addendum and no more than 10% percent cover on invasive species such as
Cork elm, Scots brooms, English ivy, holly, and Himalayan blackberry in the mitigation area.
There are 87 plants alive (84.5% of CASP objective of survival of 103 plants) — a net gain of 2
plants since last monitoring in July 2021, representing a gain of four newly discovered live
plants and death of two previously counted, but still exceeding the 80% objective. Plant growth
is good for most plants, although Oregon grape has been slow to grow for unknown reasons.
The planted conifers now are an average height of over 5 feet, with a few over ten feet. Shrubs
range from three to five feet average height. The revegetation should proceed well with no
additional major maintenance needed.
On June 1, just prior to the monitoring, NWI removed tall grass, some teasel and blackberry by
weedwhacking. Some cork elm and knotweed outside of the monitoring area is starting to
resprout after having been sprayed in previous years and will be sprayed again, separate from
this mitigation project.
This report represents the final Year Five monitoring report. The monitoring objective has been
met and no further reporting is required.