As requested by the U.S. Forest Service (USFS), the U.S. Geological Survey (USGS) has performed a peer review of the documentation of a series of tests on the possible effects of selected boundary conditions in two groundwater models for the Rosemont Copper project. These documents were requested and received by the USFS in 2012. The tests were suggested by the USGS in 2012 in comments to the U.S. Fish and Wildlife Service and during other discussions. The USFS requested that the USGS review the documentation as part of Task 4: USGS Review of Boundary Condition Test Documentation, completing the following items:
- Evaluate if the tests were conducted in the manner suggested by the USGS;
- Evaluate if the results of these tests help reduce the uncertainty associated with the groundwater models by better describing the effects that boundary conditions have on model results.
This letter incudes USGS comments that address the items listed above. USGS comments are limited to the information and results provided in the documentation.
U.S. Geological Survey. 2015b. Peer review of the documentation of a series of tests on the possible effects of selected boundary conditions. Letter from James Leenhouts, Director, U.S. Geolgical Survey, Arizona Water Science Center, to Jim Upchurch, Forest Supervisor, Coronado National Forest. Tucson, Arizona: U.S. Geological Survey. February 4.