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Mosquito Control Continues to Protect Public Health During Coronavirus Outbreak

The Cowlitz County Mosquito Control District is committed to protecting public health. The District is taking proactive steps in order to protect staff and residents to help slow the spread of COVID-19. However, the current preventative measures to contain the spread of coronavirus will not hinder performance of essential mosquito control activities in Cowlitz County.  The District will continue to provide essential Mosquito Control service such as mosquito inspections, surveillance and control to prevent mosquito transmitted diseases. Mosquito bites can not transmit COVID-19 however they can transmit several other diseases including West Nile Virus.  Despite the emphasis on COVID-19, we can’t lose sight of the fact that other debilitating and potentially fatal diseases transmitted by mosquitoes may also potentially infect our citizens. 

As a protective measure, we are closing our offices to the public, however service requests can be submitted online at or by calling the Mosquito Control Hotline at 360-425-5658

While organized mosquito control activities are vital to reducing human-mosquito contact, don’t forget the importance of public action. The general public can make substantial contributions to their own safety by following “the 3 D’s”:

•             Drain:    Empty out water containers at least once per week

•             Dress:  Wear long sleeves, long pants, and light-colored, loose-fitting clothing

•             Defend:  Properly apply an approved repellent such as DEET, picaridin, IR3535, oil of lemon-eucalyptus or any other EPA-registered repellent.

We will continue to monitor, assess and adjust our operations as conditions change. We encourage you to follow the CDC and your local public health department guidelines about slowing the spread of COVID-19.

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Cowlitz County Mosquito Control Board Meeting Dates for 2020

The Cowlitz County Mosquito Control Board will meet on the following dates for 2020.

Tuesday, April 14, 2020 6:00 p.m.
Tuesday, June 16, 2020 6:00 p.m.
Tuesday, September 8, 2020 (set preliminary budget for 2021) 6:00 p.m.                 
Tuesday, October 13, 2020 (Public Hearing) 6:00 p.m.

All meetings will be held at the times designated above at 1319 South 13th, Kelso, Washington.

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Public Notice of Mosquito Control Activities

Public Notice of Mosquito Control Activities

The Cowlitz County Mosquito Control District will begin seasonal activities soon.

Only when mosquito larva is found will they use one of the following larvicides.

  1. VectoBac EPA# 73049-10 and 73049-38 (Bacillus thuringiensis, subspecies Israelensis): specific for mosquito larva
  2. Vectolex FG EPA# 73049-20 (Bacillus sphaericus): specific for mosquito larva
  3. Vectomax FG EPA# 73049-429 (Bacillus thuringiensis, subspecies Israelensis and Bacillus sphaericus): specific for mosquito larva
  4. Vectoprime FG EPA# 73049-501 (Bacillus thuringiensis, subspecies Israelensis and S-Methoprene): specific for mosquito larva
  5. Natular EPA# 8329-84 and 8329-83 (Spinosad): the first mosquito larvicide evaluated as a Reduced Risk Product by the EPA
  6. Altosid EPA# 2724-421 and 2724-448 (S-Methoprene) a growth inhibitor active on mosquito larva
  7. Cocobear Oil EPA# 8329-93 (mineral oil): for late stage larva and pupa on impounded water bodies

Later in the season and only in areas where adult mosquitoes cause extreme annoyance or mosquito transmitted disease is present will the district adulticide using:

  • Permanone EPA# 432-1277 (Permethrin) which is Ultra Low Volume sprayed at a rate between 0.024 and 0.112 ounces per acre.

Mosquito control activities will continue throughout the season until mid-October.

For further information or to report mosquito problems, visit their website at or phone the Mosquito Control Hot Line (360) 425-5658. Additional information and schedule changes will be posted on their website.

You may also contact the Ecology Aquatic Pesticides Permit Manager, Jon Jennings at: (360) 407-6283

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Board Meeting Notice and Agenda

Cowlitz County Mosquito Control District
Meeting Date: Tuesday, October 8, 2019 at 6:00 p.m
Cowlitz County Mosquito District Facility: 1319 13th Avenue S., Kelso, WA 98626
Public Hearing on Budget for 2020

  1. Call to order – Moksness
  2. Roll call — Moksness
  3. Changes & Additions to Agenda, if any.
  4. Approval of minutes—September 10, 2019 — Moksness
  5. Public Hearing on proposed 2020 budget
  6. Resolution 2019-06—Classification of Property — P. Brock
  7. Resolution 2019-07—Adopting the Final Budget
    for 2020 and Setting the Final Base Assessment Rate — P. Brock
  8. Approval of Vouchers — Moksness
  9. Report from Trevor Schneider
  10. Consideration of entering into an Agreement with Columbia
    County to provide aerial treatment using its drone — P.Brock/Schneider
  11. Resolution 2019-08—Meeting Dates for 2020 — Moksness
  12. Other
  13. Adjourn

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Public Notice

The Cowlitz County Mosquito Control District Board of Trustees, sitting as a Board of Equalization, will consider the assessments of persons owning property within the District at a public hearing to be held on October 8, 2019. All tax parcels of one (1) acre or less shall be assessed approximately $4.55.  Larger parcels shall be assessed at a rate reflective of their size. In addition, tax parcels situated within certain areas of the District shall be assessed a fifty percent (50%) surcharge. The rates applicable to larger parcels and the areas subject to surcharge are more particularly described on the District’s website: .  For information regarding the approximate assessments to be imposed upon any benefited property, call Trevor Schneider, District Manager, at 360-423-5311, or information can be obtained at the hearing location immediately preceding the hearing.

All persons who may desire to object to their assessment may make such objections in writing by filing the same with Trevor Schneider, Program Manager, Cowlitz Co. Mosquito Control District, PO Box 1261, Longview, WA 98632 prior to the date fixed for hearing. Objections can also be raised at the public hearing in person.


6:00  p.m.

1319 13th Avenue South

Kelso, WA 98626

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How To Calculate Your Assessment

If your parcel is

Acre sizeAssessment Amount
0-1 acres$4.55
1-5 acres$9.10
5-25 acres$13.65
25-50 acres$18.20
50-100 acres$22.75
100-500 acres$27.30
Over 500 acres$31.85

How to Determine if Your Parcel is Within a Surcharge Area

If any part of your parcel is within one of the following described areas, it will be subject to a surcharge.

California Way

All lots connected to California Way

Kalama River Road

Kalama River Road. Begin at 107 Kalama River Road; continue east to 461 Kalama River Road (Parcel 60893). All lots between these two addresses accessed by Kalama River Road.

Mint Farm

Begin at Olive Way and Ocean Beach Hwy. Olive Way to Memorial Park Drive. Memorial Park Drive West to 38th Ave. South on 38th Ave to Industrial Way.  Industrial Way southwest to Washington Way. Washington Way east to Rail Road tracks crossing Washington Way (just west of 34th Ave). Rail line north to Ocean Beach Hwy. Ocean Beach Hwy. to Olive Way.

South Kelso

Begin on Talley Way at Coweeman River Bridge. West to east bank of Cowlitz River. North along east bank of the Cowlitz River to Allen Street. Follow Allen Street east to I-5. Follow I-5 south to Exit 36. Follow Exit 36 Ramp B to Talley Way at Coweeman River Bridge.

Spirit Lake Hwy

Begin at Si Town Road. All lots connected to Si Town Road. All lots connected by road to Spirit Lake Hwy. from Si Town Road to Gallow Road.

West Ocean Beach

Begin at 38th Ave and Ditch 8 (2098 38th Ave- Parcel 107890100) Follow Ditch 8 north to Mount Solo Road. Mount Solo Road south to Willow Grove Connection Road. Willow Grove Connection Road north to junction of Ocean Beach Hwy. Continue north across Ocean Beach Hwy to Coal Creek Road. Following Coal Creek Road north to Pacific Way. Follow Pacific Way east to 38th Ave. Follow 38th Ave. southwest to 38th Ave. and Ditch 8.

Willow Grove

Willow Grove Road and Columbia Point Road.  All lots connected to Columbia Point Road. South on Willow Grove Road to Taylor Sands Road. All lots connected to Taylor Sands Road. Continue southwest on Willow Grove Road all lots connected to Willow Grove Road from Taylor Sands to 7401 Willow Grove Road (Parcel WL1806011)

If your parcel is located in a surcharge area, multiply your rate based on parcel size by 1.5.

For parcels up to 1 acre:  $6.59

For parcel between 1-5 acres: $13.65

For a parcel between 5-25 acres:  $20.48

For a Parcel between 25-50 acres $27.30

For parcels designated as forest lands:  Calculate your rate as provided above and reduce the result by 90%.

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Cowlitz Co. Mosquito Control Board Meeting

Cowlitz County Mosquito Board Meeting Agenda for Tuesday, September 10

6:00 p.m.—Mosquito Control District
                   1319 13th Avenue S., Kelso, WA 98626

  1. Call to order —- Moksness
  2. Roll call —  C. Brock
  3. Changes & Additions to Agenda, if any —  Moksness
  4. Approval of minutes—June 18, 2019 meeting  —  Moksness

  5. Voucher Approval  —   Moksness
  6. Report from Trevor Schneider   —   Schneider
  7. Discussion regarding implementation of Special
    Assessment upon property owned by Pacific Fibre,
    including consideration of Resolution 2019-04   —   P. Brock
  8. Discussion of Trevor Schneider’s Employment status for
    2020, including possible Executive Session   —   P. Brock
  9. Review of Proposed 2020 Budget   —   Schneider
  10. Preliminary Budget for 2020 Discussion   —   Moksness
  11. Review of Expenditures to Date and Cash on Hand   —   C. Brock
  12. Adoption of Preliminary Budget    —   Moksness

    Resolutions (to be voted on individually)   —   Pat Brock
    Resolution 2019-05—Setting Preliminary 2020 budget
    Resolution 2019-06—Setting Date for Public Hearing
  13. Other

  14. Adjourn

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Cowlitz County Mosquito Control District Board Meeting

Meeting Date:  Tuesday, June 18, 2019

6:00 p.m.— 1319 So. 13th, Kelso

  1. Call to order — President Moksness
  2. Roll call – C Brock
  3. Changes & Additions to Agenda, if any.
  4. Approval Special Meeting Minutes held May 28, 2019 — President Moksness
  5. Voucher Approval — President Moksness
  6. Report from Trevor Schneider:
    Changing vendors for District’s database system
  7. Appointment of Board Employee Liason representative — President Moksness
  8. Other
  9. Adjourn