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Ltr/Revw Bsln Env Data - 7 - July 2, 1986 <br />(A). Garve Canyon. The response on channel dimensions and AVF <br />potentia o t e ower portion of Garvey Canyon is adequate. <br />(B). Little Salt Wash. The information provided on sub-irrigation <br />and water avai a r ,ty in the Little Salt Wash basin is adequate. <br />(C ). Coal Gulch. The discussion on the feasibility of storing water <br />from ephemer~streamflow in reservoirs is adequate. The data <br />presented on Coal Gulch flood flows is subject to interpretation. <br />These peak flows were not "recorded" but rather estimated (see <br />discussion under Surface Water Information, item l.c.). The statement <br />that snowmelt runoff is apparently inconsequential in the Coal Gulch <br />drainage can not be substantiated without further study (see item <br />l.a.). The description of water storage along Big Salt Wash is <br />adequate. <br />(D). Big Salt Wash. The information provided in the response to <br />this commentis e~equate. However, the regional practices definition <br />which uses a criteria of a minimum valley width of 800 ft. as part of <br />the definition may be too restrictive. Areas that are narrower than <br />800 ft. in width may be potentially irrigable if they approach or meet <br />the other regional practices criteria. A strict interpretation of this <br />criteria may exempt areas that, upon further inspection, may indeed be <br />classified as a potential AVF. For the purposes of determining the <br />adequacy of baseline data for AYFs, however, the information provided <br />in the adequacy review responses can be considered adequate. <br />Soils Resource Information 2.04.9 <br />(A). A generalized (Order 3) soil survey was presented for the <br />47,000 acres of the "Fruits Mines Study Area" by James P. Walsh & <br />Associates, Inc., in a report dated november 1, 1983. This report <br />provides a good starting point for identifying soil resources at this <br />site. However, it should be stressed that more intensive soil sampling <br />(e. g., Order 2 survey) similar to what is presented in the November 15, <br />1983 report by Walsh & Associates would be required if any additional <br />lands would be disturbed (i.c., areas exceeding the already addressed <br />6,700 acres in the November 15, 1983 report). <br />(B). Footnote 2 for "Effective Rooting Depth" of the Chipeta silty <br />clay loam on Table 2.04.9-1 is missing. Please provide this footnote. <br />(C). The following comments pertain to Table 2.04.9-8 "Depth of <br />suitable Topsoil Material by Map Unit". <br />