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Mr. Joshua Carpenter <br />U.S. Army Corps of Engineers, Albuquerque District <br />January 8, 2021 <br />Page 2 <br />usace trans letter_clevenger_ranch_colorado_holcimus_revised <br />within the Property would likely be classified as summarized below and indicated <br />on the attached PJD Form and supporting documentation: <br /> <br />o Ephemeral: Approximately 0.9 miles from the western Property boundary <br />to the limestone knickpoint. <br />o Intermittent: Approximately 0.2 miles from the confluence of Red Creek <br />with the western most tributary within the Property boundary to the <br />northern extent of the Property boundary. <br />o Perennial: Approximately 1.9 miles from the just upstream of the lime- <br />stone knickpoint to just below the confluence of Red Creek with the <br />western most tributary within the Property boundary. <br /> <br />• Approximately 2.3 acres of possible wetlands were identified along Red Creek. <br /> <br />• The tributaries to Red Creek were reassessed to determine the boundary be- <br />tween ephemeral and upland ditch in December 2020 and the revised total was <br />determined to be 5.88 miles, as shown in Attachments A and B to the PJD Form. <br /> <br />• Two (2) tributaries to the Arkansas River were reassessed to determine the <br />boundary between ephemeral and upland ditch in December 2020 and the re- <br />vised total was determined to be 0.42 miles, as shown in Attachments A and B <br />to the PJD Form. <br /> <br />• The Minnequa Canal flows across the property along the northeast corner. The <br />canal is fully fenced within the Project Site and is siphoned under Red Creek, <br />just north of the Property boundary. It is assumed that any impact to the canal <br />shall be avoided during mining operations and is not considered jurisdictional. <br /> <br />Brown and Caldwell is providing the attached revised PJD Form and supporting docu- <br />mentation with a request of reassessment and approval of Formal PJD determination <br />previously approved by the USACE Albuquerque District Staff. <br /> <br />If you have any questions or require additional information, please contact me at (303) <br />239-5473. <br /> <br />Very truly yours, <br /> <br />Brown and Caldwell <br /> <br /> <br />Aylin Lewallen <br />Project Manager <br /> <br /> <br />Enclosure