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Topographic Survey Shows Progress at Triple Creek

OHA partners with US Fish and Wildlife Service to conduct topographic surveys of the stream channel and banks to measure (even small) changes in elevation of the creek bed and shifts in the streambanks over time. The topographic surveys show how silt, sand, and gravels have accumulated, scoured, and moved throughout the project reach as the force of water carries the sediment downstream, recruits it from the streambanks, and deposits it on the creek bed. 

Graph above shows topographic survey (elevation data) plotted versus the relative distance in the thalweg of the stream. Points A-D on the graph are comparable to those points on the map below.
Aerial view (above) of Triple Creek Project area. Cooler colors signify aggradation and warmer colors signify erosion. Both processes are critical to the restoration of this stream and wetland.
The aerial view above shows that the reach is significantly longer and more sinuous now than it was before the project started.

Progress By The Numbers: 

  • 3800 yd3 = 271 dump trucks of sediment deposited in the reach!
  • 1500 yd3 = 107 dump trucks of sediment eroded in the reach!
  • 5300 yd3 = 378 dump trucks of sediment shifted within the reach!
  • 2300 yd3 = 164 dump trucks of sediment carried from outside the project area and deposited in the reach!

Happy Earth Day 2022!

OHA is celebrating Earth Day 2022 with gratitude for everything you do to support OHA’s work and to honor and protect the earth wherever you are!

A sampling of the beauty of the Highlands this Earth Day

Check out our calendar of upcoming events, and join us as a participant or volunteer! For more details on our upcoming events, reply to this email or contact us at info@okanoganhighlands.org. 

We are inspired by the circle of generations working together to make the world a better place. This photo shows the kickoff of a field trip to the Triple Creek Restoration Project!

Upcoming opportunities to get involved with OHA!

  • Saturday, May 28: Trail Stewardship (Location TBD)
  • Saturday, June 4: Trail Stewardship (Sno Park Pond – Fence repair)
  • Saturday, June 11: Trail Stewardship (Virginia Lilly Trail)
  • Tuesday, June 14-Thursday, June 16: Forest Ecology and Stewardship with Upward Bound (Lost Lake)
  • Saturday, June 18: Trail Stewardship (Pine Chee Trail)
  • Saturday, June 25: Trail Stewardship (Virginia Lilly Trail)
  • Saturday, June 25: Family Nature Hike with Kim Kogler (Beth/Beaver Lake Trail)
  • Sunday, June 26: Geology Field Trip with Karl Lillquist
  • Saturday, July 9: Trail Stewardship (Strawberry Mountain Trail)
  • Saturday, July 9: OHA Annual Membership Meeting/30th Year Celebration (Lost Lake Group Camp)
  • Sunday, July 10: Get Lost! Trail Race (register using this link!)

You can also find these events, and details about them on our Events Page Calendar!

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