Water Resources Division
Management Division

COMPREHENSIVE FLOOD HAZARD MANAGEMENT
PLANS

Naches River

Comprehensive Flood Hazard Management Plans contain recommendations on future flood hazard management alternatives for problematic areas. Once the plan is adopted by the local government, it serves as a policy document, for the County and Cities that adopt it. The Plan itself is not a regulatory document, but identifies and prioritizes flood control and mitigation projects for the community. Adoption of the plans increases the chances of State and Federal funding of projects and post flood disaster relief.

The main steps in a CFHMP are as follows:

  • Establish a citizen and agency participation process
  • Quantify the problem and objectives for flood hazard management
  • Determine the need for flood hazard management measures
  • Identify & evaluate alternative flood hazard management measures
  • Develop a flood hazard management strategy
  • Submit the final CFHMP to Ecology

Yakima County has completed, or is currently working on, three Comprehensive Flood Hazard Management Plans: The Upper Yakima River CFHMP, The Naches River CFHMP, and the Ahtanum-Wide Hollow CFHMP. The Lower Yakima River CFHMP will be initiated in 2014.

CFHMP Map
Click on map for larger image

2006 NACHES RIVER CFHMP

The Naches River CFHMP covers the Naches River from the confluence of the Naches and Tieton Rivers to the Twin Bridges northwest of Yakima.

The Naches River Comprehensive Flood Hazard Management Plan was adopted by the participating agencies on the following dates:

Board of County Commissioners – 8/22/06
Naches Town Council – 9/11/06
Ecology - 10/12/07

1998 UPPER YAKIMA RIVER CFHMP

2007 UPPER YAKIMA RIVER CFHMP UPDATE

The Upper Yakima River CFHMP covers the Yakima River between the mouth of the Yakima River Canyon to Union Gap, and the Naches River from it’s mouth at the Yakima River up to the Twin Bridges. The Plan was adopted by the County in 1998, and amended in 2007 as new information has emerged about the condition of the Yakima River.

The amended 2007 Upper Yakima River CFHMP was adopted by the participating agencies on the following dates:

Board of County Commissioners - 6/19/07
Selah City Council – 6/26/07
Union Gap City Council – 08/13/07
Yakima City Council – 5/6/08
Ecology - 01/22/10

AHTANUM-WIDE HOLLOW CFHMP

The Ahtanum-Wide Hollow CFHMP covers the entire Ahtanum and Wide Hollow watersheds, focusing on the Ahtanum Valley Floor, West Valley, Union Gap, and parts of Yakima. The Yakama Nation is a partner in the project - Ahtanum Creek forms the northern boundary of the Yakama Reservation. This plan was forwarded to the local governments for adoption in October 2011 and adopted by the Board of County Commissioners 10/16/12