Statutes, codes, and regulations
Wyoming Administrative Code
Agency 020 - Environmental Quality, Dept. ofSubagency 0009 - Solid Waste Management
Chapter 4 - CONSTRUCTION/DEMOLITION LANDFILL REGS
Section 4-4 - Design and Construction Standards

020-4 Wyo. Code R. § 4-4

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Current through April 27, 2019
Section 4-4 - Design and Construction Standards

Each facility shall be designed and constructed in compliance with the standards listed in this section.

(a) Surveyed corners: All site boundary corners shall be surveyed and marked with permanent survey caps.

(b) Access restrictions:

  • (i) The working area of all facilities shall be fenced in such a manner as to discourage people and livestock from entering the facility and to contain a majority of litter within the facility:
    • (A) Additional fencing may be required to restrict access to reclaimed areas or other areas that may present public health and safety hazards;
    • (B) If the facility is located on property which already has a restrictive perimeter fence, the requirement for a perimeter fence around the landfill may be waived. Additional fencing (i.e. litter collection fences) may still be required.
  • (ii) If the public has access to the facility, any access roads shall be equipped with a gate which can be locked when the facility is unattended.

(c) Posting standards: If the facility is open to the public, each point of access shall be identified by a sign, which shall be easily readable, maintained in good condition and which contains at a minimum the following information:

  • (i) For facilities not open to the public:
    • (A) Identification of the facility as a solid waste landfill.
    • (B) Wastes accepted for disposal at the facility.
  • (ii) For public facilities:
    • (A) The facility name;
    • (B) The name and phone number of the responsible person to contact in the event of emergencies;
    • (C) The hours of operation;
    • (D) Wastes accepted for disposal at the facility;
    • (E) Identification of the facility as a public facility;
    • (F) A Requirement to notify the landfill operator of any asbestos wastes.

(d) Access road standards: Facility access roads shall be constructed to enable use under inclement weather conditions.

(e) Firelanes: All facilities shall have a fire lane which is a minimum of 10 feet wide around the active disposal area and within the working area/perimeter fence.

(f) Topsoil standards: Topsoil from all disturbed areas shall be stripped and stockpiled in an area which will not be disturbed during facility operation. Topsoil stockpiles shall be located such that they will not be disturbed by future operation of the landfill, until needed for reclamation purposes. These stockpiles shall be identified by signs, and vegetated as required for stabilization. This topsoil will be used for site reclamation. Topsoil shall not be removed from the facility without written authorization from the department.

(g) Structural stability: Engineering measures shall be incorporated into the landfill design to insure stability of structural components in unstable areas and seismic impact zones.

(h) Surface water run-off designs: Surface water diversion structures such as berms and ditches shall be properly sized to accommodate:

  • (i) A 25-year, 24-hour event for temporary structures anticipated to be used for periods less than 5 years;
  • (ii) A 100-year, 24-hour event for structures anticipated to be used for five years or longer.

(i) Slope stability for excavations: Trench wall slopes shall not exceed a ratio of 1:1 (horizontal:vertical) unless a slope stability analysis demonstrates steeper slopes can be safely constructed and maintained. This analysis may be based on site specific soil stability calculations, or Wyoming Occupational Safety and Health Administration regulations for excavations, or on the operator's previous excavation experience in this locality.

(j) Litter control: Litter control measures will include provisions for litter catch screens and any other additional controls necessary to prevent the facility from becoming unsightly.

(k) Buffer zones: A buffer zone of at least 20 feet shall be maintained within the perimeter of each facility to allow proper reclamation.

(l) Control of active area: The facility shall be designed to limit dumping to the smallest practical area. Signs or other physical dumping barriers shall be available to direct dumping to the proper area, or the facility attendant shall assure that dumping is adequately defined.

(m) Storage and treatment standards: All facilities shall comply with minimum standards in Chapter 6 if applicable.

020-4 Wyo. Code R. § 4-4