Solid Waste Operations

Asotin County operates a municipal solid waste (MSW) landfill located in an unincorporated section of Asotin County, Washington, southwest of the City of Clarkston. The Asotin County Regional Landfill (ACRL) facility is located in the south section of County-owned Section 36 (one square mile) of Township 11 North Range 45 East. The facility provides regional solid waste disposal services for three counties (Asotin and Garfield Counties in Washington, and Nez Perce County in Idaho) and four Cities (Clarkston, Asotin, and Pomeroy in Washington, and Lewiston in Idaho).

The ACRL includes the original landfill unit and a new modern landfill. The original landfill consisted of an unlined waste disposal area covering approximately 46 acres located in the western half of the site (also referred to as the “closed landfill”). The original opened in 1975 and was formally closed in 1993 under the requirements of the Minimum Functional Standards for Solid Waste Handling [Chapter 173-304, Washington Administrative Code (WAC)]. Early-era landfill operations and associated state landfill permit regulations prior to 1991 did not require a bottom landfill liner system as is required under modern landfill regulations.

Current waste disposal activities occur within a series of four lined cells (Cells A-D). Landfill Cell A opened in 1991, whereas Cells B and C began operations in 1997. A fourth cell (Cell D) opened in 2014. The active, lined cells are operated in accordance with modern landfill regulations, Criteria for Municipal Solid Waste Landfills, Ch. 173-351, WAC.

The facility is also comprised of the following support facilities and structures: entrance facilities (scale and scalehouse/office building, recycling collection area, organic wood waste collection area, white goods recycling area), moderate risk (household hazard) waste (MRW) facility, public self-haul MSW drop-off area, shop building, and a landfill gas flare station.

The County is currently evaluating long-term waste management options beyond the permitted life of the modern landfill (Cells A-D), to continue to satisfy the County’s vision and mission for solid waste management in Asotin County and with its waste partners. 


Main Entrance/Receiving Area

Vehicles leave 6th Avenue to enter the landfill. Directional signs and traffic lights are provided to control traffic at the facility.

Traffic control lights are used at the scale, which is designed for one way travel at a time. A light is located before the scale on each approach and on the scale itself.

From the scales, traffic (both public and commercial) will proceed to the active working area in the landfill. The public tipping area is segregated by concrete jersey barriers and signage from the commercial area within the active working area of the cell. This helps to keep the public away from the landfill equipment that is actively working the open face of the landfill.

Scalehouse/Office Building

A scale and office building is provided beyond the recycling area just inside the entrance of the landfill. The scalehouse is the primary means of controlling vehicles and waste entry into the ACRL. Scalehouse operations include determination of waste type and quantity (weight), designation of point of delivery (to drop-off facilities, direct to landfill, or other), payment (or charge-out) of appropriate fees, and recording of all pertinent data. The scalehouse is equipped with a computer to record scale and customer data.

Drop-Off Facilities

Drop-off facilities are provided at the entrance to the ACRL for three distinct waste materials, recyclables, white goods, and MRW.

  • Recycling Area - Recyclable materials are accepted from the general public, provided the materials are separated and placed in the appropriate containers. At the entrance to the facility, a parking/turn-around area with designated containers is provided. Separate containers are available for aluminum cans/tin cans and plastic milk jugs, cardboard, and newspaper. Signs in the area direct the users to deposit materials by type in the appropriate container. Recyclables can be removed prior to entering the scale or after weighing out.
  • Moderate Risk Waste Facility - A moderate risk wastes (MRW) (household hazardous waste) is also provided to minimize disposal of these wastes in the landfill. This facility is also used for storage of moderate risk wastes that are identified and removed from the public tipping area and the active disposal area. Additional information on the MRW facility is provided in the associated MRW information tab.
  • White Goods Collection and Storage Area - A drop-off area for white goods (home appliances) is provided to minimize disposal of these types of materials in the landfill and to encourage recycling. White goods are charged to the customer by the unit at two rates. A higher rate is paid for appliances with refrigerants. After entering the site, the public can by-pass the scales with acknowledgement from the Scale Attendant and drop-off their white goods at the White Goods Collection and Storage Area. The customer then will have to pull through the scales for weigh in if they have MSW to dispose. Alternately, the customer can pass through the scale to the waste tipping area in the cell, dump their waste, pass back through the scale and then proceed to the White Goods Collection and Storage Area to drop off any appliances.
  • Public Self-Haul MSW Drop-Off Area - To reduce congestion at the open face of the landfill, the general public, with relatively small quantities of MSW, are directed to deposit their waste in grade-break area just after the scales. The public self-haul MSW drop-off area is located just beyond the scales on the south side of the main access road. Signs direct the users to this area.