Lefthand Watershed Oversight Group

The Lefthand Creek watershed is located north of Boulder, Colorado and drains about 85 square miles. It covers an area ranging in elevation from 4,000 feet on the plains east of Longmont to over 13,000 feet near the Indian Peaks Wilderness at the Continental Divide. It contains the Lefthand, James, and Little James creeks and numerous small streams with intermittent flow.

The Lefthand Creek provides drinking water to about 18,000 residents and agricultural producers in unincorporated Boulder County via the Lefthand Water District. The water is also used in the town of Niwot. Lefthand Water eventually makes it to taps as far east as I-25 in Weld County.

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Current Activities:

  • We have hired a new Watershed Coordinator. He is Glenn Patterson, who brings to the position 30 years of experience as a hydrologist with the U.S. Geological Survey. You can contact Glenn at 303-747-2089.
  • Recently concluded a two year study with CU's Prof. Joe Ryan, Susan Bautts, and Seacrest Labs Director Shannon Phelps examining the metal contamination in the sediments and waste rock piles in the watershed.
  • The LWOG leads a group of dedicated volunteers to monitor sites along the Little James and Lefthand Creeks. Our goal is to determine metal impacts and monitor clean-up effectiveness. Samples are processed and posted online using the Division of Wildlife's RiverWatch Program.
  • Currently we are updating our watershed plan to incorporate new analysis and to reflect completed clean-ups.
  • Beginning work on clean-up of Porphyry Tailings .Site
Contact Us: scampi162 (at) gmail.com

Upcoming Events:

Our next board meeting is scheduled for Fall 2011. The exact date and location has yet to be determined.


Announcing a search for a new Coordinator for the Lefthand Creek Technical Advisory Group Coalition (LCTC)!

LCTC is soliciting applications for the Coordinator for local communications regarding the Captain Jack Mill Superfund site on upper Lefthand Creek.  Applications should be sent to Jan Toniazzo, at jtoni@q.com  Experience in watershed science, outreach and grant administration and reporting is desired.  The Coordinator will serve as a liaison between the technical advisor and the LCTC Board.  The Board comprises local citizens and experts interested in the progress of the State and Federal restoration program at the Captain Jack Mill Superfund site.  The Technical Advisor is Dr. Joe Ryan of the University of Colorado.  The Coordinator position is a part-time independent contractor position compensated on the basis of actual hours worked.  Hours are likely to amount to about 10 hours per month.  Applications are due by July 15, 2011.  For questions contact Jan Toniazzo at jtoni@q.com.

Click here to download the latest newsletter.

Click here to view photos taken at the Slide Mine Voluntary Clean-up on November 20th, 2007.

Click here to view photos taken at the Captain Jack Superfund site on May 9th, 2007.

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Resources and Information:

Assesment of Metal Contamination in Sediments and Waste Rock Piles in the Lefthand Creek Watershed (PDF 3.46 MB)

Spring 2007 Newsletter (PDF 505 KB)

Watershed Management Plan for the Upper Lefthand Creek Watershed (1.64 MB)

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Watershed Info | Organization Info | News | Resources

Lefthand Watershed Oversight Group P.O. Box 1074 Niwot, CO 80544-1074
scampi162 (at) gmail.com