40 rosemont copper - a bridge to a sustainable future

United States Army Corps of Engineers

TITLE: Preliminary Jurisdictional Determination for the Rosemont Project, Pima County, Arizona

RELEASE DATE: July 2009 PREPARED BY: WestLand Resources, Inc.Brief Summary: WestLand studied about 9,136 acres,

mainly in the Barrel Canyon drainage basin, to identify potential jurisdictional waters for the United States Army Corps of Engineers (USACE). It found 154 impermanent or seasonal drainage features to be potential waters, including the sub-watersheds of Scholefield Canyon, McCleary Canyon, and Wasp Canyon. An estimated 101.6 acres of potential jurisdictional waters were identified.

Of 22 specific features identified for wetland analysis in the Rosemont project analysis area, only one, Scholefield Spring, was found to be a potentially jurisdictional wetland according to USACE criteria.

These lands are partly managed by the Coronado National Forest, or fee land and patented claims held by Rosemont. Mining began in the Rosemont area in the 1870s and was mostly completed by 1920; ranching began around 1900 and has since declined, although grazing continues.

This delineation of potentially jurisdictional waters has been accepted by the USACE and Rosemont Copper Company for the purposes of permitting under section 404 of the Clean Water Act.

40 rosemont copper - a bridge to a sustainable future

United States Army Corps of Engineers

Approximately 9,000 acres of the land that will be used for theRosemont Copper project were evaluated, as well as the surrounding area .

rosemont copper - a bridge to a sustainable future 41

14 Oversized JD Figures

TITLE: Overview for Analysis AreaRELEASE DATE: May 2009

TITLE: SHT-2-W through SHT 14-wRELEASE DATE: May 2009

TITLE: Preliminary Jurisdictional Determination: Rosemont Project, Sycamore Canyon Supplement, Pima County, Arizona

RELEASE DATE: January 2010PREPARED BY: WestLand Resources, Inc.Brief Summary: WestLand studied about 3,536 acres

in the Sycamore Canyon drainage basin, to identify potential jurisdictional waters for the USACE. It found 13 impermanent or seasonal drainage features to be potential waters. An estimated 11.2 acres of potential jurisdictional waters were identified.

Of four specific features identified for wetland analysis in the Sycamore Canyon analysis area, only one, Fig Tree Spring, was found to be a potentially jurisdictional wetland according to USACE criteria.

These lands are a combination of fee lands or patented claims held by Rosemont and lands managed by the Coronado National Forest.

This delineation of potentially jurisdictional waters has been accepted by the USACE and Rosemont Copper Company for the purposes of permitting under section 404 of the Clean Water Act.

TITLE: Preliminary Jurisdictional Determination: Santa Rita Road Waterline for the Rosemont Project, Pima County, Arizona

RELEASE DATE: March 2010PREPARED BY: WestLand Resources, Inc.Brief Summary: WestLand studied about 22.4 linear miles

of variable width, totaling approximately 1,158 acres, in the Santa Cruz River watershed between the Santa Rita Mountains and the Santa Cruz River, to identify potential jurisdictional waters for the USACE. It found 95 impermanent or seasonal drainage features to be potential waters. An estimated 21.6 acres of potential jurisdictional waters were identified. No features were identified for wetland analysis.

The analysis area included a combination of lands held by the Arizona State Land Department, Coronado National Forest, Bureau of Land Management and private landowners.

This delineation of potentially jurisdictional waters has

been accepted by the USACE and Rosemont Copper Company for the purposes of permitting under section 404 of the Clean Water Act.

TITLE: 6 oversized JD FiguresRELEASE DATE: March 2010

rosemont copper - a bridge to a sustainable future 41