Xapnish Property - Toppenish Creek
Columbia River steelhead are iteroparous (able to spawn multiple times). However, as post-spawned steelhead (kelts) attempt to migrate downstream to return to the ocean, their survival is adversely affected by major dams. Therefore, an innovative approach to effectively increasing abundance and productivity of steelhead populations is to capitalize on their inherent iteroparity by reconditioning kelts.
Branch Creek enters North Fork Toppenish Creek at river mile 3.2, and drains a 23-square-mile watershed. Mid-Columbia River steelhead use the stream for spawning and rearing. Two locations on Branch Creek were identified as suitable for culvert removal and replacement by armored stream fords. One is located at RM 1.1 and the other at RM 1.4. The project is located in the NW1/4, NE1/4, Township 9 North, Range 14 East, Section 1, on tribal trust land in the closed area of the Yakama Reservation.
Agency Creek enters Simcoe Creek at river mile 9.5, and drains a 23-square-mile watershed. Middle Columbia River steelhead use the creek for spawning and rearing. Steelhead redd counts in Agency Creek have ranged from 4 to 20 since 1999, and the creek is recognized as a spawning aggregation for steelhead recovery purposes. Juvenile steelhead rear through the summer in the creek near its confluence with Simcoe Creek.
This project expands research, monitoring, and evaluation (RM&E) activities conducted by the co-managers in the Yakima Basin (Yakama Nation and Washington Department of Fish and Wildlife-WDFW) to better evaluate viable salmonid population (VSP) parameters (abundance, productivity, spatial structure, and diversity) for Yakima River steelhead (Oncorhynchus mykiss) populations. It was developed to fill critical monitoring gaps identified in the 2009 Columbia Basin monitoring strat
The Sunnyslope Side Channel Project is located on the Wenatchee River at RM (river mile) 1.4. This excavated side channel is approximately 1,350 feet in length. It is connected to a natural side channel of the Wenatchee River at the upstream end and flows into the mainstem of the Wenatchee River at the downstream end. This project is aimed at creating a groundwater fed side channel with an upstream connection during high flows (approximately 7,000 cfs or greater).
Yakama Reservation Watershed Project (YRWP) proposed to remove a culvert on North Fork Simcoe Creek just above its confluence with Diamond Dick Creek within the closed area of the Yakama Nation Reservation. The culvert was undersized and a seasonal barrier to ESA listed Middle Columbia River Steelhead (MCRS). At high flow, the culvert became clogged and temporarily re-routed water down the adjacent road stranding fish and damaging the road surface.
Yakama Nation Fisheries (YNF) removed a six-foot diameter culvert and the concrete fill material associated with it. The culvert was located on Toppenish Creek (watershed area is greater than 200 sq. mi.) near the confluence of Toppenish and Simcoe Creeks, approximately ½ mile west of Brownstown Rd. The culvert is on property recently acquired by the Yakama Nation.
A reach assessment of the area adjacent to the culverts was conducted to identify any risks such as potential head-cuts or areas primed for avulsion.
This project was implemented to assist in managing the migration of cattle from low elevations in the spring to higher elevations in the early summer. Prior to the project, upon cattle turnout on May 1, cattle would quickly travel approximately 25 miles to the headwater meadows of Satus and Toppenish Creeks. Livestock immediately impacted several important high elevation meadows, by overgrazing and by creating hardened cattle trails. These impacts further increased channel incision and bank erosion in these areas..
Satus Dam—also known as the Shadduck Dam—was installed in Satus Creek over a half-century ago by Wapato Irrigation Project (WIP). The dam was used to divert water to supplement the irrigation water in the Satus District of WIP. The diversion had been obsolete for over 20 years and WIP intended to remove the dam, but lacked funding.