Public Works

Pittman Wash Management Criteria

Pittman Wash Management Criteria - DRAFT

The City of Henderson has an overriding responsibility to residents and property tax payers across the city to protect public infrastructure, private property, and the health and safety of citizens and visitors.  The Pittman Wash is dedicated as a public right-of-way with a primary use as a flood control and utility corridor. It is identified as a regional flood control facility and the conveyance capacity and efficiency as such may not be compromised. As a member agency, the city adheres to the guidance and minimum criteria provided in administrative documents, prepared through the Clark County Regional Flood Control District (CCRFCD) with the support and cooperation of each member agency, to maintain the effectiveness of the facility. The Pittman Wash also contains a large-diameter sanitary sewer that conveys wastewater from a majority of the residents and businesses in Henderson located between the I-215 Beltway and Warm Springs Road to the lowest elevation of the service area, which is the Pittman Wash. The city has prepared key management criteria for the following topics to guide the preparation of a proactive maintenance plan for the Pittman Wash:

  • Meet local, state, and federal regulatory requirements
    • Floodplain regulations
      • No greater than a 1-foot rise in water surface elevation from existing to allowable vegetated condition
      • City pre-approval of any trail building, dog waste bag supply stations, benches, kiosks, etc.
    • Storm water quality regulations
      • No pet waste receptacles
      • No trash receptacles
    • Biological monitoring
      • Complete regularly scheduled work between October 1 and February 28
      • Hire qualified biologist prior to unscheduled work between March 1 and September 30
  • Provide for public health and safety
    • Urban search and rescue
      • Provide and maintain permanent access road
      • Clear view of wash area from park trail
    • Minimize fire hazards
      • 5-foot buffer from property walls, 30-foot buffer from structures; whichever is greater
      • Control density of vegetation in wash
    • Maintain flood protection
      • Stabilize bed and bank erosion
      • Repair engineered channel lining between Pebble Road and Green Valley Parkway
      • Repair erosion damage in channel between Pebble Road and Arroyo Grande Boulevard
      • Provide and maintain access for inspection and repair
    • Mosquito and rat-borne diseases
      • Follow Southern Nevada Health District guidance to prevent mosquito breeding and any other identified public health threats
      • Keep water flowing, eliminate ponding and backwater
      • Eliminate vegetation at storm drain outfalls
      • Eliminate invasive palm and cypress species
  • Protect public infrastructure to ensure efficient operation and meet expected life cycle
    • Stabilize bed and bank erosion
    • Create buffer from and control types of vegetation in proximity to infrastructure
      • No vegetation having a mature height of greater than 3-feet shall be placed within 5-feet (outside to outside) of the sanitary sewer pipes
      • Eliminate vegetation growth in the vehicle ingress or egress pathways to the access road
    • Proactive infrastructure inspection, operation, and maintenance
      • Maintain facility in condition and manner specified in controlling
      • Provide and maintain permanent access road for inspection and maintenance
      • Prepare Pittman Wash-specific maintenance manual
  • Vegetation monitoring and control
    • Eliminate woody vegetation from engineered linings
    • Eliminate vegetation at storm drain outfalls
    • Control height and density of vegetation within flow area

Next steps:

  1. City staff met with the President of the Friends of Pittman Wash and received a memo of understanding and list of environmentally friendly wash maintenance goals or objectives.
  2. City staff from departments including Public Works, Fire, Utilities, Parks and Recreation, Mayor and Council Support and Public Affairs will meet internally to compile regulations, permits and requirements we collectively must follow. City staff will also discuss best practices for public notice of future wash projects and maintenance.
  3. City staff will create a draft Pittman Wash Maintenance and Operations Manual that includes all of the requirements, goals and criteria to measure performance and compliance.
  4. City staff will host a neighborhood meeting to share information and gather ideas from all of the neighborhoods adjacent, the Friends of Pittman Wash and concerned citizens.
  5. City staff will review the information gathered and prepare a final draft of the Pittman Wash Maintenance and Operations Manual.
  6. The Pittman Wash Maintenance and Operations Manual will be presented to the Mayor and City Council for either approval and adoption by Resolution or for informal approval as part of a city council presentation.
  7. The Pittman Wash Maintenance and Operations Manual will be published and notice sent through social media postings (Nextdoor and/or Facebook) and available for download on the city's website.