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I~tf•-"96-ISM WORK SHEET YOUNG PIT LITIGATION D. CONGER Item No.. J Project Estimator Type of Work RICHMOND INQUIRY Date 11 July 97 Sheet No. SAM, THE OCCURENCE OF GRAVEL DEPOSITS ALONG THE ENTIRE NORTHWEST RIM OF THE BENCH BETWEEN THE MANGOS RIVER AND MUD CREEK IS OBVIOUS FROM THE HISTORIC GRAVEL PITS THAT HAVE OCCURRED THERE, BEGINNING ON THE NORTH WITH THE PIT ON THE MOLA PROPERTY AND CONTINUING SOUTHIJEST ALONG THE RIM TO THE NEIJ NOLAiID PIT, YOUNG'S PROPERTY, BURTON, KEITI{ (M[n. Gravel's new Pi[), AND THE OLD NOLAND DIGGINS ON THE WILLBURN PLACE. TO WHAT EXTENT THEY EXTEND BACK TO THE SOUTHEAST FROM THE RIM OVERLOOKING t•IUD CREEK WE CANNOT TELL WITHOUT DIGGING TEST PITS AND/OR EXAMINING WELL LOGS (IF THEY EXIST IN SIGNIFICANT NUMBERS). WE AT NIELSONS DUG ENOUGH TEST PITS TO SATISFY OURSELVES THAT THE NORTH!•]EST HALF OF THE SE'g NEB SECTION 2 (OUR PRESENT PROPOSAL) HAS FEASIBLE DEPOSITS OF GRAVEL, ALTHOUGH THEY ARE BURIED UNDER UP TO 9 FEET OF OVERBURDEN. MOST LIKELY THE DEPOSITS EXTEND MOST OF THE WAY SOUTHEAST TO THE EDGE OF THE MANGOS RIVER, AND EVEN BEYOND, ALTHOUGH THEIR COVERAGE BY OVER- BURDEN MAKES THEM LESS OBVIOUS THA:`1 THE EXPLOITED NORTHWEST EDGE. TO IdHAT EXTENT THIS WAS KNOWN BY THE AVERAGE LANDOWNER IS SPECULATIVE. MOST OF THE TIME LANDO(dNERS ARE MORE CONCERNED WITH WHETHER THEY CAN IRRIGATE, ENCOUP.AGE PASTURAGE, ROTATE CROPS, AND KEEP LIVESTOCK FENCEDIN. NIELSONS` ATTACHED "EXHIBIT G" FROM THE PERMIT APPLICATION MAKES REFER- ENCE TO THE "PERCHED ALLUVIAL BENCH AQUIFER" WHEN DESCRIBING THE idATER RESOURCES OF THE REGION. THE "AQUIFER" IS THE POROUS SAND b GRAVEL DEPOSIT WHICH IS OVERLAIN BY HEAVY RED CLAY, AND UNDERLAIN BY THE IMPERVIOUS AND INFAMOUS MANGOS SHALE FORMATION. WATER IS TRAPPED BETWEEN THE TWO CLAYS WHERE IT FLOWS SLOWLY SOUTH-SOUTH1dEST AS IT IS RECHARGED BY SURFACE IRRIGATION SEEPAGE. ;i~ ~ -~-- ~ 1=. - : ~:,... 00225