Flood Control Zone District

Capital Projects

Capital Projects



Slide Ridge Retrofit: A team of experts designed a bridge structure for this location to eliminate Slide Ridge’s impact on South Lakeshore Road (photo above). A bridge will reduce the risk of damage to life and property through the conveyance and control of mud and debris flows originating from Slide Ridge. A bridge also will ensure a year-round, continuous corridor for the community that surrounds Lake Chelan and it will be a proactive solution to a problem that Chelan County has dealt with for decades. Construction is now underway.

No. 1 Canyon Flood Debris Basins: A team of experts is designing a series of flood debris basins that will be built on county-owned land in No. 1 Canyon in Wenatchee. The debris basins will provide a collection and release point for reoccuring, debris-laden floodwaters that often strike the canyon following rain events or during heavy snowmelt. Construction is now planned for summer 2022.

Antoine Creek Road Culvert Replacement: Spring runoff events in the Antoine Creek Basin have been so severe since the 2015 Chelan Complex Fire that on more than one occasion the water has left the creek bed and covered Antoine Creek Road, causing severe road damages and even landlocking some property owners until waters receded. Three culverts that run adjacent to the road could no longer convey these increased water flows; they were upsized to box culverts, allowing for increased water flows and debris to pass during larger runoff events. Paid for in part with a $180,000 federal post-fire grant, the project was completed in July 2021.



Ski Hill Basin Analysis: In the past, the Ski Hill Basin has experiencd increased volumes of runoff, impacting both public and private property. A FCZD consultant team completed an analysis of the basin identifying flood risks and creating a framework for reducing flooding impacts to public and private property within Chelan County and the City of Leavenworth. The analysis will guide future capital projects that will protect property and the health and safety of the public.



No. 1 Canyon Conveyance Project: Completed in 2018, construction involved the installation of 450 feet of 36-inch culvert to aid in the conveyance of reoccuring flood flows from No. 1 Canyon.

No. 1 Canyon Gap Analysis: No. 1 Canyon can be characterized as having a steep channel profile throughout its 6.8-square-mile basin, allowing for alluvial sediment transport in debris flows typically occurring during floods on the order of 10-year and greater recurrence intervals.  When this happens, flooding of private and public property occurs, leaving costly cleanup to homeowners, Chelan County and the City of Wenatchee. The Gap Analysis analyzes the basin as a whole and determines where and what is needed to minimize the damage experienced from this type of flooding event.

Posted: 10/30/2019 08:35 AM
Last Updated: 07/20/2021 03:36 PM

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Chelan County Calendar

Upcoming events and schedules at the county!

  • 22
    Jun 2022
    07:00 PM - 09:00 PM

    Planning Commission - June 22,2022

    Posted by: Community Development

    400 Douglas Street
  • 17
    Jun 2022
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    Ballots mailed for military, overseas and out of state voters

    Posted by: Chelan County Elections

    Ballots mailed for Military, Overseas and Out of State voters

  • 15
    Jun 2022
    01:00 PM - 03:00 PM

    Hearing Examiner - June 15, 2022

    Posted by: Community Development

    By Zoom Video Conference
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    Jun 2022
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    June Parenting Class - English and Spanish

    Posted by: Superior Court Clerk

    Supporting Children Through Divorce is a four-hour educational program designed to help parents focus on the needs of their children during and after divorce and separation.

    Chelan County Administration Building - Enter building from Douglas Street
  • 01
    Jun 2022
    09:00 AM - 01:00 PM

    Hearing Examiner - June 1, 2022

    Posted by: Community Development

    By Zoom Video Conference