HomeMy WebLinkAboutY4MR 8013320032021 ANNUAL MONITORING REPORT FOR CASP Mitigation for Septic Permit
"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
July 9, 2021
July 9, 2021 MITIGATION SITE PLANT MONITORING DATA (2021 MONITORING REPORT)
Ave.
2019
2019
2021 2021 height
Plant species
Height (h) of each plant counted In mitlgat Ion area March'
June
April July (ft)
Sitka spruce
10 5 2
2
2 2r 7.5
Grand fir
25575575 4472971 16
16
16 15' 4.9
Western red cedar
3 2 3 7 6 7 4 10
10
10 7 r 4.6
Red flowering current 3 4 4 4 5 5 6 5 5 9
10
11 9 r 4.6
Pacific Crabapple
4 1
2
1 1V 4.0
Bigleat maple
3 4 3 4
a
3 3 r 3.3
Red osier dogwood
3 5 4 5
5
4 3 V 4.0
Snowberry
4323 3234334334433332324332 24
24
23 26' 3.0
Nootka rose
2 4 4 4 4 3 3 10
11
9 7 e 3.4
Oregon grape tall
2 2 3 1 1 1 3 3 30
11
8 8 V 2.0
Red alder
46 16
4
2 2 r 5.0
Willow
7 0
1
1 1 V 7.0
Bitter cherry
4 0
0
1 1 r 4.0
TOTAL
107
100
91 85
Survival • percent of
GASP
Objective (103 plants) alive
97.1
98.3 82.5
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-Than, 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
Figure 1. Photo -point 1, north half of mitigation site, July 9, 2021
Figure 2. Photo -point 2, south half of mitigation site, July 9, 2021
Figure 3. Photo -point 3, SW corner of mitigation site (standing), July 9 2021
Figure 4. Photo -point 4, SW corner of mitigation site (squatting), July 9 2021
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 85 plants alive (82.5% of CASP objective of survival of 103 plants) — a loss of 6 plants
since last monitoring in April 2021, but still exceeding the 80% objective. Plant growth is good
for most plants, although Oregon grape has been slow to grow for unknown reasons. One cork
elm was discovered on the boundary of the planting site.
In July, just prior to the monitoring, NWI removed Himalayan blackberry and teasel by weed
whacking.
Weed control will continue in 2022 with additional weed whacking as needed. Cork elm is
starting to resprout across the site and will be sprayed in summer of 2021. The final Year Five
2022 monitoring report will be prepared in March of 2022.