GENERAL49968 - Laserfiche WebLink

Home Browse Search

Relevant Information in Current Permit Document and Findings Documents From the July 1987 RN-1 Findings Document, Page 19 and 20: The alluvial deposits along Wilson Creek constitute an AVF because there are enough unconsolidated stream-laid deposits and sufficient water yield to be beneficial for crop irrigation. Wilson Creek is a perennial stream. There is both historical and current flood irrigation occurring on the AVF. Map 10 of the permrt application delineates the boundaries of the AVF and shows existing flood irrigated crop lands. Information presented by the applicant in the letter of October 8, 1981 shows that areas in the upper reaches of the Wilson Creek AVF were historically flood irrigated... Map 17 of the permit application shows that current land use along Wilson Creek AVF is cropland, pasture, and undeveloped rangeland. The crop produced on the irrigated cropland, locafed abouf % mile north of the permit area, is native hay. All other cropland shown on Map 17 is unirrigated dryland wheat... From page 4 of the RN-1 Summary Findings: Mining impacts on AVFs in the area were predicted to be minimal, and there is no evidence to dispute that estimate at this time. During 1985, natural erosion processes created severe mass-wasting along Wilson Creek, and for all intents and purposes destroyed this AVF. This impact was not related to the mining operation. Relevant narrative from Section 2.06.8 of the approved permit application: P. 2.06-11 ...the floodplains of Goodspring Creek, Wilson Creek, lower Taylor Creek and lower Elkhorn Creek may conform to the geomorphic criteria of AVF surtace landforms because they are underlain by unconsolidated material of Quaternary Age... P. 2.06-12 ...some limited irrigation is conducted in the floodplains of Goodspring Creek and lower Wilson Croek...The irrigated land and topography of those areas that are currently or were historically flood irrigated are shown on the Regional Hydrology Map (Map 10). P. 2.06-13 The floodplains of Goodspring Creek, Wilson Creek and lower Taylor Creek may meet the geomorphic criteria and flood irrigation requirements of an alluvial valley floor. Current Permit Map 10-Regional Hydrology The map shows unconsolidated streamlaid deposits along much of the length of Wilson Creek, but it does not appear to show current or historic flood irrigated areas anywhere along the length of the stream. This is in contradiction of the permit text. Also, my recollection from our site visit was that there was an irrigated farm or pasture field just upstream from the project site access road crossing of the creek.