09.e Informational-2022YearendWatercraftInspectionSummaryReportComfort Lake-Forest Lake Watershed District
2022 Watercraft Inspection Program
Yearend Report
December 5, 2022
Cover Image: 2022 CLFLWD Level 1 Watercraft Inspectors
2 | Page 2022 Watercraft Inspection Program Yearend Report
Table of Contents
Introduction ..................................................................................................................................... 3
Funding and Goals .......................................................................................................................... 4
Results ............................................................................................................................................. 6
District-Wide ............................................................................................................................... 6
Bone Lake .................................................................................................................................. 13
Forest Lake ................................................................................................................................ 16
Comfort Lake ............................................................................................................................. 20
Discussion and Conclusion ........................................................................................................... 23
List of Figures
Figure 1. Financial contributions for 2022 watercraft inspection program .................................... 4
Figure 2. Funded inspection hours for 2022 watercraft inspection program .................................. 5
Figure 3. District-wide inspections and hours per season............................................................... 6
Figure 4. District-wide inspections, hours, rates, and goals ........................................................... 7
Figure 5. District-wide inspections and hours per day for the 2022 season ................................... 8
Figure 6. District-wide watercraft contaminants and drain plug violations.................................... 9
Figure 7. Spiny water flea (left) and starry stonewort (right). Source: MNDNR ......................... 11
Figure 8. Summary of inspection hours, surveys, and inspection rates for Bone Lake. ............... 13
Figure 9. Bone Lake watercraft contaminants and drain plug violations. .................................... 14
Figure 10. Summary of inspections hours, surveys, and inspection rates for Forest Lake. .......... 16
Figure 11. Forest Lake watercraft contaminants and drain plug violations .................................. 18
Figure 12. Summary of inspection hours, surveys, and inspection rates for Comfort Lake. ........ 20
Figure 13. Comfort Lake watercraft contaminants and drain plug violations .............................. 21
Figure 14. Bait disposal station at West Rush, Chisago County public access ............................ 24
Figure 15. 2022 Annual State of the Watershed - Watercraft Inspection Demonstration ............ 25
List of Tables
Table 1. Top 10 lakes boaters intended to visit after leaving a District lake in 2022 ................... 10
Table 2. Number of watercrafts entering District lakes that were last in an AIS infested lake. ... 12
Table 3. Forest Lake inspection hours .......................................................................................... 17
Table 4. Forest Lake number of inspections ................................................................................. 17
Table 5. Forest Lake inspection rate (inspections/hour) ............................................................... 17
Appendix
2022 Watercraft Inspection Summary Infographic
3 | Page 2022 Watercraft Inspection Program Yearend Report
Introduction
The Minnesota Department of Natural Resource’s (DNR) Watercraft Inspection Program is a state-
wide program that was first created in 1992. From the beginning, the DNR’s goal for the program
was “To prevent the spread of invasive species within Minnesota through boater education,
watercraft inspections and watercraft decontaminations at public water accesses”. In 2011,
legislation was signed into law that allowed watercraft inspectors to visually and tactilely inspect
water related equipment, decontaminate water-related equipment, prohibit access to boaters that
refuse inspection or fail to remove contaminates and require watercrafts be decontaminated prior
to launching into Minnesota waters. Contaminates are anything that could harbor invasive species
or be invasive itself such as plants, animals, mud, and water. While the DNR hires its own
watercraft inspectors for the program, most inspectors in the state are hired and paid for by
watershed districts, conservation districts, lake associations, lake improvement districts, and many
other organizations. In total, organizations across the state performed over 524,000 watercraft
inspections in 2022.
To implement the watercraft inspection program in 2022, the Comfort Lake-Forest Lake
Watershed District (CLFLWD) entered into a joint powers agreement with the Minnesota
Department of Natural Resources (DNR) for authority to conduct boat launch inspections. The
District continued its multi-year partnership with Chisago County to hire, train, and oversee
inspectors. Through this partnership, Chisago County managed payroll and human resources for
inspectors and received reimbursement from the CLFLWD for hours worked within the District.
Chisago County inspectors were stationed at public lake accesses within the CLFLWD (which
covers portions of Washington and Chisago counties) as well as throughout the remainder of
Chisago County. Additionally, the CLFLWD directly hired several of its own inspectors in order
to increase presence at boat launches on weekends and holidays.
There are five public lake accesses within CLFLWD, and inspectors were stationed at each one
throughout the summer. Public accesses include one at Bone Lake, one at Comfort Lake, and three
at Forest Lake: Forest 1 (located on the west basin at Lakeside Park), Forest 2 (located on the
middle basin near Willow Point), and Forest 3 (located on the east basin and in some cases referred
to as Hagberg). Hours worked by inspectors at each access are largely dependent upon funding
and boater traffic. The Forest Lake 1 access has the highest boater traffic and is therefore assigned
the most watercraft inspector shifts within the District.
Watercraft at the District’s 5 public accesses were inspected by either a Level 1 inspector or a
Level 2 inspector. Both Level 1 and Level 2 inspectors are trained by the DNR and perform visual
inspections as well as verbal boater surveys. In addition, Level 2 inspectors are qualified to operate
a decontamination unit. This involves using a high-pressure, high-heat spraying machine to
remove plants, animals such as mussels, and other potential contaminants from watercraft. Chisago
County operates a decontamination unit which rotates between 14 high-traffic accesses throughout
CLFLWD and Chisago County including Forest 1, Forest 3, Comfort Lake, and Bone Lake. The
DNR also operates a decontamination unit which rotates between Forest 1 and other accesses
throughout the East Metro. Level 1 inspectors are not permitted to operate the decontamination
unit, and instead solely complete the visual inspections of the watercraft and verbal boater surveys.
4 | Page 2022 Watercraft Inspection Program Yearend Report
Funding and Goals
Funding for the CLFLWD’s watercraft inspection program was provided by multiple sources
including the Aquatic Invasive Species Prevention Aid Program for both Washington and Chisago
counties, local municipalities, and local interest groups such as lake associations and the Lions
Club. Figure 1 illustrates financial contributions to the 2022 watercraft inspection program. Note
that certain organizations opted to allocate funding to specific waterbodies (e.g. Bone Lake
Association’s donations allocated to Bone Lake).
Figure 1. Financial contributions for 2022 watercraft inspection program
In order to set goals and determine hiring needs, estimated financial contributions were converted
to inspection hours using an average hourly billing rate. For level 1 and 2 inspectors, the billing
rate was $22/hour. Figure 2 illustrates the estimated number of hours each financial contribution
would cover.
Comfort Lake Bone Lake Forest Total
Scandia-Marine Lions Club $500.00
City of Scandia $1,000.00
Comfort Lake Assoc.$500.00
City of Forest Lake $9,772.82
Forest Lake Lake Assoc.$-
Wash. Co. AIS Prevention $1,000.00 $14,354.00
Bone Lake Assoc.$2,500.00
Chisago Co. AIS Prevention $5,000.00
CLFLWD Local Funds $6,000.00 $6,000.00 $18,000.00
TOTAL FUNDING $11,500.00 $11,000.00 $42,126.82
$11,500.00 $11,000.00
$42,126.82
$- $5,000.00 $10,000.00 $15,000.00 $20,000.00 $25,000.00 $30,000.00 $35,000.00 $40,000.00 $45,000.00
2022
Watercraft Inspection Program
Estimated Funds per Lake
5 | Page 2022 Watercraft Inspection Program Yearend Report
Figure 2. Funded inspection hours for 2022 watercraft inspection program
With the available funding, this year the District was able to hire a total of 12 inspectors to perform
watercraft inspections at District accesses. Some inspectors were hired through the Chisago
County joint program (4 staff), and others were hired directly by CLFLWD (8 staff).
Comfort Lake Bone Lake Forest Total
Scandia-Marine Lions Club 23
City of Scandia 45
Comfort Lake Assoc.23
City of Forest Lake 444
Forest Lake Lake Assoc.0
Wash. Co. AIS Prevention 45 652
Bone Lake Assoc.114
Chisago Co. AIS Prevention 227
CLFLWD Local Funds 273 273 818
TOTAL HOURS GOAL 523 500 1,915
523 500
1,915
0
500
1,000
1,500
2,000
2,500
2022
Watercraft Inspection Program
Funded Hours
(Budget converted to hours based on $22/hr hourly billing rate)
6 | Page 2022 Watercraft Inspection Program Yearend Report
Results
District-Wide
Inspection Hours and Scheduling
District-wide, watercraft inspectors performed 8,956 inspections and worked 3,673.75 hours in
2022. Inspectors averaged a rate of 2.44 inspections per hour. Figure 3 summarizes the total
number of inspection hours and inspections completed District-wide over the last nine seasons.
Figure 3. District-wide inspections and hours per season
As a planning tool to meet inspection hour goals, District staff take the number of funded
inspections hours and divide it by the number of weeks in the watercraft inspection season. This
calculation generates an average number of hours to work per week to use all funded hours by the
end of the season. The goal number of hours per week of 117 was met by week 4 and was sustained
until week 24 near the very end of the season. The number of inspections, and inspection hours by
week throughout the season, as well as the rate of inspections/hour, and the hours/week goal can
be found in Figure 4 . The spikes in inspections/hours that can be seen in the graph are generally
2014 2015 2016 2017 2018 2019 2020 2021 2022
Hours 1523 3440 3078 4036 3388.5 3917.8 3679.8 3551 3673.75
Inspections 2699 3867 4033 8240 6773 7069 10363 9177 8956
Inspections/Hour 1.77 1.12 1.30 2.04 1.99 1.80 2.82 2.58 2.44
0.00
0.50
1.00
1.50
2.00
2.50
3.00
0
2000
4000
6000
8000
10000
12000
Inspections/HourNumber of Inspections and HoursDistrict Wide Inspection Hours and Number of Inspections
per Season (Includes DNR)
Hours Inspections Inspections/Hour
7 | Page 2022 Watercraft Inspection Program Yearend Report
attributed to holidays or seasonal changes (e.g. week five includes Memorial Day and week ten
includes the Fourth of July).
Figure 4. District-wide inspections, hours, rates, and goals
To maximize cost effectiveness and inspection numbers, weekend hours are prioritized for
conducting watercraft inspections due to the general higher level of activity. As a result, 57% of
hours and 65% of inspections occurred Friday through Sunday. Inspection hours worked during
the week (Monday – Thursday) are typically performed by Chisago’s and the DNR’s inspectors.
Figure 5 shows the number of inspections and hours per day for the 2022 season.
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
0
100
200
300
400
500
600
700
800
900
Week 1Week 2Week 3Week 4Week 5Week 6Week 7Week 8Week 9Week 10Week 11Week 12Week 13Week 14Week 15Week 16Week 17Week 18Week 19Week 20Week 21Week 22Week 23Week 24Week 25May June July August September October Inspection Rate (# Inspections/Hour)Hours & Number of Inspections District-Wide Inspections and Hours/Week
Inspections Hours 2022 Hour Goal Inspections/Hour
8 | Page 2022 Watercraft Inspection Program Yearend Report
Figure 5. District-wide inspections and hours per day for the 2022 season
Survey Results
In addition to a watercraft inspector’s responsibility to thoroughly inspect watercrafts for aquatic
invasive species (AIS) and other contaminants, they are also required to complete an inspection
survey for each boat that enters or exits a lake. Completed surveys are uploaded to the DNR’s
state-wide inspection survey database where program coordinators across the state can view the
data. Important information such as number of boats entering and exiting a lake, incoming boat
AIS violations, and new AIS infestation risk assessment can be calculated. In 2022, a total of 8,956
watercraft inspection surveys were performed on District lakes. Below are some findings from the
inspection survey data. A summary of this information can be found in Figure 6.
• 50 watercrafts arrived at District lakes with contaminants such as plants, animals,
mud, or water on their equipment. This number was 65 in 2021, 148 in 2020, 122 in
2019, 140 in 2018, 213 in 2017, 41 in 2016 and 39 in 2015. Note that transportation of any
plants or animals on watercraft, not just invasive species, is prohibited. These watercrafts
were cleaned off and/or drained prior to launching. If vegetation or mud could not be
removed by hand, watercraft were denied launch.
Monday Tuesday Wednesday Thursday Friday Saturday Sunday
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
0
500
1000
1500
2000
2500
3000
3500
Monday Tuesday Wednesday Thursday Friday Saturday Sunday Inspection rate (inspections/Hour)Number of Inspections and Hours District-Wide Inspections and Hours/Days
Hours Inspections Inspections per Hour
9 | Page 2022 Watercraft Inspection Program Yearend Report
• 29 watercraft required removal of the bilge drainage plug upon arriving at District
lakes. This number was 33 in 2021, 83 in 2020, 85 in 2019, 115 in 2018, 115 in 2017, 19
in 2016 and 67 in 2015. After educating the watercraft user on the potential of AIS in their
bilge water, bilge plugs were removed from the watercraft and all water was drained prior
to the watercraft launching in an area that would not flow into the lake.
• 850 watercraft exited District lakes with contaminants such as plants, animals, mud,
or water present. This number was 786 in 2021, 1462 in 2020, 867 in 2019, 931 in 2018,
804 in 2017, 187 in 2016 and 260 in 2015. Note that transportation of any plants or animals
on watercraft, not just invasive species, is prohibited. All contaminants were removed from
the watercraft and trailer before departing from the lake.
Figure 6. District-wide watercraft contaminants and drain plug violations as reported over the
last eight seasons. Contaminants include plants, animals, mud, and water.
Included in the inspection survey are questions regarding the waterbody most likely to be visited
next by the boater. Many of the lakes that boaters intend to visit after leaving a District lake do not
have all the same AIS present in them. This information stresses the importance of not just
39 41
213
140 122 148
65 50
260
187
804
931
867
1423
786
850
67 19
115 115 85 83 33 29
0
200
400
600
800
1000
1200
1400
1600
2015 2016 2017 2018 2019 2020 2021 2022
District-Wide Watercraft Contaminants and Drain Plug Violations
Contaminants Found Entering Lakes Contaminants Found Exiting Lakes Drain Plug in Upon Arrival
10 | Page 2022 Watercraft Inspection Program Yearend Report
preventing AIS from entering District lakes but also preventing AIS from leaving them. Results of
this aspect of the survey can be found in Table 1.
Next Lake Boaters Intend to Visit after Leaving a District Lake
Lakes Eurasian Watermilfoil Zebra Mussels Flowering Rush Spiny Waterflea
St. Croix River EWM ZM X X
White Bear EWM ZM X X
Coon Lake EWM X X X
Big Marine EWM X X X
Chisago EWM X X X
Clear Lake EWM X X X
Green Lake EWM X X X
Mille Lacs EWM ZM X SW
Bald Eagle EWM ZM FR X
Minnetonka EWM ZM FR X
Table 1. Top 10 lakes boaters intended to visit after leaving a District lake in 2022
Risk of New Invasive Species
Unfortunately, many CLFLWD lakes are home to a number of aquatic invasive species such as
curly-leaf pondweed, Eurasian watermilfoil, flowering rush, zebra mussels, and several others.
Species such as these are a concern to the District as they have the ability to cause ecological,
recreational, economic, and physical harm. While the District manages many of the aquatic
invasive species present in its lakes, it is still widely known that the most effective management
strategy is prevention. There are still many species that are not yet in District lakes and one of the
main goals of the CLFLWD watercraft inspection program is to prevent their introduction.
Starry stonewort and the spiny water flea are two examples of aquatic invasive species found in
Minnesota that are not yet found in District lakes. Starry stonewort is an invasive macro-algae that
forms dense mats in lakes that can impede boating and prevent the establishment of beneficial
native plants. Starry stonewort was discovered in Lake Koronis near Paynesville, MN in 2015 and
has since been discovered in 21 additional lakes across the state. In 2022, four new lakes were
added to the DNR’s infested waters list for starry stonewort, Bemidji and Turtle River Lakes in
Beltrami County and Bowen, and Thunder lakes in Cass County.
The spiny water flea is an invasive species of zooplankton which is about the size of a grain of rice
that competes with small fish for the same food resource (other zooplankton). The spiny water flea
was first discovered in Lake Superior in the early-1980s and has since spread to more than 66
inland lakes in Minnesota including: Mille Lacs Lake, Lake Vermilion, Lake of the Woods, and
others.
11 | Page 2022 Watercraft Inspection Program Yearend Report
Both invasive species are thought to be transported primarily by recreational watercraft.
Figure 7. contains photos of spiny water flea and starry stonewort.
Figure 7. Spiny water flea (left) and starry stonewort (right). Source: MNDNR
Part of the watercraft inspection survey involves asking the boaters which lake they visited last.
The boaters’ responses can be cross referenced with records that the DNR keeps of infested waters.
This is a way to estimate the risk of these species spreading to District lakes. Note that
transportation of water or any plants or animals on watercraft, not just invasive species, is
prohibited. District watercraft inspectors required that these watercrafts be cleaned off,
decontaminated and/or drained prior to launching into the lake.
• 95 boats launching into District lakes came from lakes infested with spiny water flea.
This number was 96 in 2021, 158 in 2020, 111 in 2019, 104 in 2018, 171 in 2017, and 231
in 2016.
• 48 boats launching into District lakes came from lakes infested with starry stonewort.
This number was 48 in 2021, 30 in 2020, 22 in 2019, 61 in 2018, 14 in 2017, and 83 in
2016.
• In 2022, 101 boats came from a lake infested with brittle naiad, 21 came from a lake
with New Zealand mudsnail, 24 from a faucet snail infested lake, and 3 from a lake
with the VHS virus.
12 | Page 2022 Watercraft Inspection Program Yearend Report
Table 2. The number of watercrafts entering District lakes that were last in an AIS infested lake.
These figures are likely a slight underestimation as a substantial number of inspections did not
include enough information to determine which waterbodies boaters were last in.
Number of entering watercrafts that were last in an AIS infested waterbody
Comfort
Lake
Bone
Lake Forest 1 Forest 2 Forest 3 Grand Total -
All Lakes
Starry Stonewort 6 4 29 2 7 48
Spiny Waterflea 11 10 48 9 17 95
Zebra Mussels 73 78 274 52 109 586
Flowering Rush 39 22 50 8 27 146
Brittle Naiad 9 17 47 9 19 101
Grass Carp 8 17 47 9 19 100
Silver Carp 9 17 47 9 19 101
Big Head Carp 9 17 47 9 19 101
New Zealand
Mudsnail 1 1 11 1 7 21
Round Goby 0 0 1 0 2 3
White Perch 0 0 1 0 2 3
VHS 0 0 1 0 2 3
Ruffe 0 0 1 0 2 3
Faucet Snail 1 1 12 1 9 24
EWM 161 186 516 81 197 1040
13 | Page 2022 Watercraft Inspection Program Yearend Report
Bone Lake
Inspection Hours and Scheduling
This season, watercraft inspectors performed 579 hours of inspections on Bone Lake which
resulted in 1007 inspections and associated surveys. Inspectors averaged 1.74 inspections per
hour. Figure 8. below summarizes the total number of inspection hours and inspections conducted
on Bone Lake over the last nine seasons.
Figure 8. Summary of the total number of inspection hours, number of surveys, and inspection
rates for Bone Lake over the last seven seasons.
277
396
266 315
520 575.3 547.5 542.5 579
166
402 322 277
500
689
1049
747
1007
0.6
1.02
1.21
0.9 0.96
1.19
1.92
1.38 1.74
0
0.5
1
1.5
2
2.5
0
200
400
600
800
1000
1200
2014 2015 2016 2017 2018 2019 2020 2021 2022 InspectionS PER HOURHours and Number of Inspections Bone Lake Inspections and Hours Worked
Number of Hours Number of Inspections Inspection Rate
14 | Page 2022 Watercraft Inspection Program Yearend Report
Survey Results
A total of 1007 surveys were performed on Bone Lake this season. Findings and a summary of the
results from the compiled inspection survey data for Bone Lake can be found below and in Figure
9.:
• 1 watercraft arrived at Bone Lake with plants, animals, mud, or water on their
watercraft. This number was 2 in 2021, 3 in 2020, 7 in 2019, 16 in 2018, 11 in 2017, 1 in
2016 and 4 in 2015. Note that transportation of any plants or animals on watercraft, not
just invasive species, is prohibited. These watercraft were cleaned off and/or drained prior
to launching into Bone Lake.
• 1 watercraft required removal of the bilge drainage plug upon arriving at Bone Lake.
This number was 13 in 2021, 12 in 2020, 12 in 2019, 8 in 2018, 1 in 2017, 2 in 2016 and 6
in 2015. After educating the watercraft user on the potential of AIS in their bilge water,
bilge plugs were removed from the watercraft and all water was drained prior to the
watercraft launching in an area that would not flow into the lake.
• 79 watercraft exited Bone Lake with plants, animals, mud, or water present. This
number was 35 in 2021, 47 in 2020, 50 in 2019, 70 in 2018, 59 in 2017, 7 in 2016 and 24
in 2015. Note that transportation of any plants or animals on watercraft, not just invasive
species, is prohibited. All contaminants were removed from the watercraft and trailer
before departing from Bone Lake.
Figure 9. Bone Lake watercraft contaminants (ex. plants, animals, mud, and water) and drain
plug violations reported over the last eight seasons.
4 1
11
16
7 3 2 1
24
7
59
70
50 47
35
79
6 2 1
8 12 12 13
1
0
10
20
30
40
50
60
70
80
90
2015 2016 2017 2018 2019 2020 2021 2022
Bone Lake Watercraft Contaminants and Drain Plug Violations
Contaminants Entering Bone Lake Contaminants Exiting Bone Lake Drain Plug in Upon Arrival
15 | Page 2022 Watercraft Inspection Program Yearend Report
Risk of New Invasive Species
A portion of the inspection survey process involves asking boaters which lake they visited last.
The boaters’ responses can be cross referenced with records that the DNR keeps of infested waters.
This is a way to estimate the risk of these species spreading to Bone Lake. Note that any watercraft
with contaminants such as plants or standing water are required to be decontaminated prior to
launch.
• 10 boats launching into Bone Lake came from lakes infested with spiny water flea.
For comparison, this number was 5 in 2021, 14 in 2020, 7 in 2019, 2 in 2018, 5 in 2017,
and 25 in 2016.
• 4 boats launching into Bone Lake came from lakes infested with starry stonewort.
This number was 5 in 2021, 2 in 2020, 3 in 2019, 3 in 2018, 0 in 2017, and 2 in 2016.
16 | Page 2022 Watercraft Inspection Program Yearend Report
Forest Lake
Inspection Hours and Scheduling
This season, CLFLWD watercraft inspectors performed 2,071.25 hours of inspections, and DNR
inspectors performed 380 hours, totaling 2,451.25 total hours of inspections on the three Forest
Lake public accesses. During this time, CLFLWD inspected 5,860 watercraft and the DNR
inspected 1,196 watercrafts, totaling 7,056 inspections and associated surveys. Together,
CLFLWD and DNR inspectors averaged 2.88 inspections per hour. A summary of this
information is presented in Figure 10. and Tables 3 - 5.
Figure 10. summary of inspections hours, number of surveys, and inspection rates over the last
nine seasons at all three Forest Lake public boat launches.
963
2506 2369
3062
2293
2771.25 2594.5 2454.5 2451.252308
2877 3147
7353
5546
5496
8093
7605
7056
2.4
1.15
1.33
2.4 2.42
1.98
3.12 3.10
2.88
0
0.5
1
1.5
2
2.5
3
3.5
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
2014 2015 2016 2017 2018 2019 2020 2021 2022 INSPECTIONS PER HOURHOURS AND NUMBER OF INSPECTIONSForest Lake Inspections and Hours Worked
Number of Hours Number of Inspections Inspection Rate
17 | Page 2022 Watercraft Inspection Program Yearend Report
Table 3. Forest Lake inspection hours
Forest 1 (West
or Lakeside
Park)
Forest 2
(Middle or
Willow Point)
Forest 3 (East
or Hagberg) Total
CLFLWD Inspection Hours 814.25 535 722 2,071.25
DNR Inspection Hours 380 - - 380
Total Inspection Hours 1,194.25 535 722 2,451.25
Table 4. Forest Lake number of inspections
Forest 1 (West
or Lakeside
Park)
Forest 2
(Middle or
Willow Point)
Forest 3 (East
or Hagberg) Total
CLFLWD Inspections 3,455 676 1,729 5796
DNR Inspections 1,196 0 0 1,809
Total Inspections 4,651 676 1,729 7,056
Table 5. Forest Lake inspection rate (inspections/hour)
Forest 1 (West
or Lakeside
Park)
Forest 2
(Middle or
Willow Point)
Forest 3 (East
or Hagberg) Average
CLFLWD Inspection Rate 4.24 1.26 2.39 2.92
DNR Inspection Rate 3.15 - - 3.29
Average Inspection Rate 3.70 1.26 2.39 2.45
Survey Results
A total of 7,056 surveys were performed on Forest Lake this season. Findings and a summary of
the results from the compiled inspection survey data for Forest Lake can be found below and in
Figure 11. Below are some findings from the inspection survey data:
• 44 watercraft arrived at Forest Lake with plants, animals, mud, or water on their
watercraft. This number was 61 in 2021, 132 in 2020, 87 in 2019, 117 in 2018, 177 in
2017, 32 in 2016, and 32 in 2015. Note that transportation of any plants or animals on
watercraft, not just invasive species, is prohibited. These watercraft were cleaned off and/or
drained prior to launching into Forest Lake. It is against state law to launch a contaminated
watercraft at a MN lake, regardless of known current infestations of that lake.
18 | Page 2022 Watercraft Inspection Program Yearend Report
• 20 watercraft required removal of the bilge drainage plug upon arriving at Forest
Lake. This number was 131 in 2021, 62 in 2020, 65 in 2019, 92 in 2018, 110 in 2017, 15
in 2016, and 54 in 2015. After educating the watercraft user on the potential of AIS (e.g.
microscopic zebra mussel larvae) in their bilge water, bilge plugs were removed from the
watercraft and all water was drained prior to the watercraft launching in an area that would
not flow into the lake.
• 755 watercraft exited Forest Lake with plants, animals, mud, or water present. This
number was 727 in 2021, 1191 in 2020, 762 in 2019, 817 in 2018, 670 in 2017, 158 in
2016, and 229 in 2015. Note that transportation of any plants or animals on watercraft, not
just invasive species, is prohibited. All contaminants were removed from the watercraft
and trailer before departing from Forest Lake.
Figure 11. Forest Lake watercraft contaminants and drain plug violations as reported at Forest
Lake accesses over the last eight seasons
32 32
177
117 87 132
61 44
229
158
670
817 762
1294
727 755
54 15
110 92 70 62
131
20
0
200
400
600
800
1000
1200
1400
2015 2016 2017 2018 2019 2020 2021 2022
Forest Lake Watercraft Contaminants and Drain Plug Violations
Contaminants Entering Forest Lake Contaminants Exiting Forest Lake Drain Plug in Upon Arrival
19 | Page 2022 Watercraft Inspection Program Yearend Report
Risk of New Invasive Species
Part of the inspection survey involves asking the boaters which lake they visited last. The boaters’
responses can be cross referenced with records that the DNR keeps of infested waters. This is a
way to estimate the risk of these species spreading to Forest Lake. Note that any watercraft with
contaminants such as plants or standing water are required to be decontaminated prior to launch.
• 74 boats launching into Forest Lake came from lakes infested with spiny water flea.
This number was 82 in 2021, 131 in 2020, 92 in 2019, 101 in 2018, 153 in 2017, and 183
in 2016.
• 38 boats launching into Forest Lake came from lakes infested with starry stonewort.
This number was 42 in 2021, 27 in 2020, 18 in 2019, 53 in 2018, 12 in 2017 and 74 in
2016.
20 | Page 2022 Watercraft Inspection Program Yearend Report
Comfort Lake
Inspection Hours and Scheduling
This summer, watercraft inspectors performed 643.5 hours of inspections on Comfort Lake which
resulted in 893 inspections and associated surveys. Inspectors averaged 1.39 inspections per
hour. A summary of this information is presented in Figure 12..
Figure 12. Summary of the inspection hours, number of surveys, and inspection rates completed
on Comfort Lake over the last nine seasons.
283
539 443
660 575.5 571.3 537.8 554 643.5
225
588 564 610
727
884
1221
825 893
0.8
1.09
1.27
0.92
1.26
1.51
2.27
1.49 1.39
0
0.5
1
1.5
2
2.5
0
200
400
600
800
1000
1200
1400
2014 2015 2016 2017 2018 2019 2020 2021 2022 INSPECTIONS PER HOUR HOURS AND NUMBER OF INSPECTIONSComfort Lake Inspections and Hours Worked
Number of Hours Number of Inspections Inspection Rate
21 | Page 2022 Watercraft Inspection Program Yearend Report
Survey Results
A total of 825 surveys were performed on Comfort Lake this season. Findings and a summary of
the results from the compiled inspection survey data for Comfort Lake can be found below and in
Figure 13.
• 5 watercraft arrived at Comfort Lake with plants, animals, mud, or water on their
watercraft. This number was 5 in 2021, 13 in 2020, 28 in 2019, 7 in 2018. 25 in 2017, 8
in 2016, and 3 in 2015. Note that transportation of any plants or animals on watercraft, not
just invasive species, is prohibited. These watercraft were cleaned off and/or drained prior
to launching into Comfort Lake.
• 8 watercraft required removal of the bilge drainage plug upon arriving at Comfort
Lake. This number was 10 in 2021, 9 in 2020, 8 in 2019, 15 in 2018, 4 in 2017, 2 in 2016
and 7 in 2015. After educating the watercraft user on the potential of AIS in their bilge
water, bilge plugs were removed from the watercraft and all water was drained prior to the
watercraft launching in an area that would not flow into the lake.
• 16 watercraft exited Comfort Lake with plants, animals, mud, or water present. This
number was 24 in 2021, 82 in 2020, 55 in 2019, 44 in 2018, 75 in 2017, 22 in 2016 and 7
in 2015. Note that transportation of any plants or animals on watercraft, not just invasive
species, is prohibited. All contaminants were removed from the watercraft and trailer
before departing from Comfort Lake.
Figure 13. Comfort Lake watercraft contaminants and drain plug violations as reported at
Comfort Lake over the last eight seasons
3
8
25
7
28
13
5 57
22
75
44
50
82
24
16
7
2 4
15
8 9 10 8
0
10
20
30
40
50
60
70
80
90
2015 2016 2017 2018 2019 2020 2021 2022
Comfort Lake Watercraft Contaminants and Drain Plug Violations
Contaminants Entering Comfort Lake Contaminants Exiting Comfort Lake Drain Plug in Upon Arrival
22 | Page 2022 Watercraft Inspection Program Yearend Report
Risk of New Invasive Species
Part of the inspection survey involves asking the boaters which lake they visited last. The boaters’
responses can be cross referenced with records that the DNR keeps of infested waters. This is a
way to estimate the risk of these species spreading to Comfort Lake. Note that any watercraft with
contaminants such as plants or standing water are required to be decontaminated prior to launch.
11 boats launching into Comfort Lake came from lakes infested with spiny water flea.
For comparison, this number was 9 in 2021, 13 in 2020, 12 in 2019, 7 in 2018, 13 in 2017,
and 24 in 2016.
• 6 boat launching into Comfort Lake came from lakes infested with starry stonewort.
This number was 1 in 2021, 1 in 2020, 1 in 2019, 5 in 2018, 2 in 2017 and 7 in 2016.
23 | Page 2022 Watercraft Inspection Program Yearend Report
Discussion and Conclusion
The 2020 watercraft inspection season remains the program’s busiest year by a significant margin.
While inspections rates (boats per hour) are slowly trending downward since the 2020 boom, rates
are still up considerably in 2022 compared to 2019 and prior. While this increase in boater traffic
means more individuals are enjoying the District’s incredible water resources, it also means a
greater risk for new AIS introductions. In response to these trends, the District has taken steps to
ensure the watercraft inspection program has the capacity and needed support to provide great
public access coverage and effectively survey and educate boaters.
The program’s biggest continuing challenge has been hiring and retaining seasonal employees.
District staff have attended meetings with other watercraft inspection program coordinators and
heard their struggles with this same issue. Not only are the required weekend shifts a deterrent to
many applicants, but the observed labor shortage following the start of the COVID-19 pandemic
has further exacerbated the issue. As the surrounding job market became more competitive (pay
and benefit increases), changes were needed for the District’s program to keep pace.
The District’s watercraft inspection compensation has always been competitive with other
programs in the state, however base pay was raised from $15 to $16 per hour in 2022 to match the
offerings from other local entry level positions. Additionally, the District implemented holiday
pay increases (1.5x the base wage) this season to incentivize inspectors to work all holidays.
Holidays are not only the program’s busiest days of the year, but also the program’s most important
for education and outreach. To encourage inspectors to work an average of 20 hours per week or
more, end of season bonuses were also implemented. These bonuses were based on both
performance and average number of hours per week worked. Lastly, the District implemented a
pay raise structure for returning watercraft inspectors. Returning inspectors are highly valued by
the District as they not only reduce the administrative stress and workload of interviewing and
onboarding new employees, but they are also more experienced and better equipped to perform
higher quality watercraft inspections. Pay raises based upon their years of experience with the
District further incentivizes their annual return.
The aforementioned compensation changes saw an immediate positive response. Not only did the
District have a sizable applicant pool to select from- this season, but the program was able to fill
all 8 available in-house positions. Furthermore, of the 8 inspectors, more than half were able to
work for the majority of the season. This capacity and availability allowed the District to have
great public access presence during the peak summer months, but also better than average coverage
during the Fall when historically many inspectors leave (return to school or other seasonal
obligation). Compensation changes were undoubtably a large contributor to the overall success of
the 2022 season.
Beyond compensation changes, the District also made program changes to existing initiatives such
as weed raking. In the past, each inspector was given a personal rake to bring with them to their
scheduled access. To reduce the amount of equipment each inspector needed to keep in their
personal vehicle, rakes were stationed at each launch and secured using a locking chain. This
ensured rakes were never forgotten at home and that one was always available for use. The lock’s
code was shared with all CLFLWD and Chisago County inspectors. These inspectors were asked
24 | Page 2022 Watercraft Inspection Program Yearend Report
to use their downtime to help keep the public access as clean as possible from floating debris. In
2022, there were 850 exiting violations, almost entirely due to trailers exiting District lakes with
plant debris. While the amount of debris floating at the boat launches can be hard to keep up with
at certain accesses and times of year, District inspectors received many compliments from visitors
on their efforts to keep the access clean.
As was mentioned in last year’s yearend WCI report, the District received a behavior change grant
from the MN DNR in 2020 to construct and install bait disposal stations. Accompanying these bait
disposal stations were educational materials and behavior change commitment strategies for the
inspectors. The project was implemented at the beginning of the 2022 season, but bait bins were
unfortunately removed shortly after due to ongoing complaints of attracting excessive litter (Figure
14, example of attracting excessive litter below during off season) rancid smells during the summer
months, and vandalism. Despite this, District inspectors continued to handout the educational
materials and educate anglers on proper bait disposal practice. For the 2023 season, bait disposal
station signs will be reworked to encourage anglers to dispose of unwanted bait in the trash rather
than in onsite bait-specific receptacles.
Figure 14. Bait disposal station at the West Rush public access in Chisago County. Example of
excessive trash and litter during the off-season.
In 2022, the watercraft inspection program extended its education and outreach efforts beyond the
public accesses with demonstrations at several District hosted events. Specifically, the August 27th
District Tour and the Annual State of the Watershed on September 27th. At each of these events,
Garrett Miller (AIS Program Coordinator) and Jack Mackenzie (CLFLWD Level 1 Inspector)
reenacted a typical watercraft inspection survey and interaction with the boater. The
demonstrations not only showed those in attendance what the program does, but also provided
spectators with the tools and knowledge to perform their own thorough watercraft inspections.
These presentations were seemingly well received and could be a useful educational tool for next
season at a variety of events.
25 | Page 2022 Watercraft Inspection Program Yearend Report
Figure 15. 2022 Annual State of the Watershed - Watercraft Inspection Demonstration (Jack
Mackenzie left and Garrett Miller right)
Overall, the CLFLWD’s 2022 watercraft inspection season was very successful in reaching its
hour and inspection goals. These achievements would not have possible without the support of the
community, local lake associations, and the District’s partners. Their generous financial
contributions and feedback are greatly appreciated and go a long way to support the program. In
2023, the District will again seek out passionate water stewards for the watercraft inspector
positions that will best represent the District and serve the community to preserve the ecological
health and recreational quality of the area’s waterbodies.