Monday, April 14, 2014

Looking Downstream 2013 update

Yosemite National Park's 2013 update report for the "Looking Downstream" project is available for download in the library.

Draft O'Shaughnessy Dam Instream Flow Management Plan

The draft O'Shaughnessy Dam Instream Flow Management Plan is available for download via links provided below.  The plan is comprised of a main document (211 pp) and 13 technical appendices (619 pp).  The main document is intended to provide a thorough description of proposed future instream flow releases for O'Shaughnessy Dam and a summary of analyses used to develop the plan.  In-depth, discipline-specific technical descriptions of analytical methods and results are provided in the appendices document for more technical readers.

Main document (41 MB pdf)
Appendices (136 MB pdf)

Saturday, April 5, 2014

Tuolumne River whitewater access opens

Whitewater boating access for the Cherry and Lumsden runs on the Tuolumne River is open for the season.  Access is by shuttle only and free, mandatory permits are required via the Groveland Ranger Station.  For more information on white water and other recreation on the Stanislaus National Forest, see the Stanislaus National Forest recreation update.  Boaters are asked to watch for hazards associated with the Rim Fire such as landslides and fallen trees.

Friday, April 4, 2014

Wapama rockfall

Recent rockfall source area adjacent to
Wapama Falls (photo: Greg Stock, NPS)
A rockfall occurred just east of Wapama Falls on the North side of Hetch Hetchy Reservoir on March 31st, covering approximately 600 ft of the Wapama Falls trail.  The falls can still be reached from the west, but the trail is closed just east of the falls.  The National Park Service does not currently have an estimated date for reopening the closed section of trail.