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Home My WebLink About5.0 Topography & GeologyLDTL Job 13013 (GS -178) Panorama Ranches SHEET / OF 4 EXPLANATION Q d m DEBRIS FLOW & MUDFLOW DEPOSITS. Contains materials derived from slope failures on Basalt Mountain, mixed with stream -trans- ported material from Cattle Creek. Grades from clays and silts to gravel and cobbles. Many basalt fragments, some sandstone cobbles. Often contains caliche deposits. Few geologic problems - cobbles and caliche may impede excavation; steeper slopes may affect construction & septic systems. Fine-grained soils susceptible to erosion. Deposit dates from early Pleistocene epoch (about 1-3 million years ago). T Q al ALLUVIUM. Includes deposits laid down by Roaring Fork River and its tributaries prior to deposition of the slope'failure ,materials. Materials are mainly clay and silt with some sand or gravel. At least one pocket of high -plasticity found. 'Some geologic problems - high -plasticity clay • is subject to failure in cut slopes; all clays will swell to varying degrees. Soils are subject to erosion. Dates from tate Pliocene - early Pleistocene (about 3 million years ago). Dashed line indicates area of current slope failure. Tb BASALT. This is the area in which the basalt lava flow and the residual soil derived from it are encountered at the ground surface. Basalt bedrock is found at depths ranging from surface outcrops to more than 10'. Soils are a silty clay with caliche layers and basalt fragments. Shallow rock and steep slopes create problems in areas. Soils are highly erodible. Lava flows deposited in late Miocene - early Pliocene (about 8 miilio years age)). LDTL TEST BORING LOCATION ■ S 8& W, Inc. TEST PIT LOCATION S a W, Inc. TEST PIT (LOGGED a SAMPLED BY LDTL) Numbers on mop ore the boring a pit numbers given in report ENGINEERING GEOLOGY 500 400 300 200 100 0 FEET 250 500 750 1000 Prepared for Colorado Country, Inc. / Thunder River Realty --Basalt, Colo. Topography by Scarrow a Walker, Inc.—Glenwood Springs, Colorado THE LINCOLN—DeVORE TESTING LABORATORY COLORADO: Colorado Springs, Pueblo, WYOMING Rock Springs Avon -Vail, Gunnison, Glenwood Springs, Montrose. Drawn by EMZ Scale' I"= 250' (13000) Date December 1975 Checked by: Contour Interval: 2 feet Revised LDTL Job 13013 (GS -178) N Panorama Ranches S • --- SHEET2 OF EXPLANATION Shallow Rock Zone Caliche at depths of 41 or less; basalt at depths of 10' or less in southern part. Slow Percolation Rates Marks test sites with percolation rates slower than 60 minutes/inch. AVA • SS- Expansive Soils Zone Clay soils with potentially slightly damaging shrink/swell potential. Subzone of soil type 9 (as designated) High plasticity clay- subject to moderately high shrink/swell and slope instability. • Steep Slopes Zone Slopes greater than 2070 - slight hazard; requires care in design and construction Slopes greater than 30% - considerable restriction on development; especially septic systems All hazard boundaries are approximate and based on interpretation of field and laboratory investigation data. For further information on hazards, see report text. LDTL TEST BORING LOCATION ■ S a w, Inc. TEST PIT LOCATION — S a W, Inc. TEST PIT (LOGGED a SAMPLED BY LDTL) Numbers on mop ore the boring a pi/ numbers given in report ENGINEERING HAZARDS 500 400 300 200 100 0 FEET 250 500 750 1000 Prepared for Colorado Country, Inc./ Thunder River Realty --Basalt, Colo. Topography by Scarrow a Walker, Inc. --Glenwood Springs, Colorado THE LINCOLN —DeVORE TESTING LABORATORY COLORADO: Colorado Springs, Pueblo, WYOMING: Rock Springs Avon -Vail, Gunnison, Glenwood Springs, Montrose. Drawn by: EMZ Scale: I" - 250 (1:3000) Date, December 1975 Checked by:a Contour Interval: 2 feet Revised: LDTL Job 13013 (GS -178) Panorama Ranches 0� SHEET 3 OF 4 1110) "MIl o.r(r plgsticis tairving caliche above basalt (soil types 5 a 7) EXPLANATION Soil types shown are estimated from test borings and test pits. Flo p asticity •ndy silts tai ing caliche above-basglt t • s 5 and 7) Sandy low clays and (soil typo LDTL TEST BORING LOCATION ■ S a W, Inc. TEST PIT LOCATION MO S a W, Inc. TEST PIT (LOGGED a SAMPLED BY LDTL) Numbers on mop are the boring a pit numbers given in report SOIL TYPES at 5' below GROUND SURFACE 500 400 300 200 100 0 FEET 250 500 750 1000 Prepared for Colorado Country, Inc. / Thunder River Realty --Basalt, Colo. Topography by Scarrow a Walker, Inc.—Glenwood Springs, Colorado THE LINCOLN—DeVORE TESTING LABORATORY COLORADO: Colorado Springs, Pueblo, WYOMING Rock Springs Avon -Vail, Gunnison, Glenwood Springs, Montrose. Drawn by DMZ Scale'I"=250 (13000) Date: December 1975 Checked by:. K Ni Contour Interval: 2 feet Revised: LDTL Job 13013 (GS -178) Panorama Ranches SHEET 4 OF 4 dff Low pia 1Its containing caliche above basalt (soil types 5 and 7) EXPLANATION Soil types shown are estimated from test borings and test pits. Low pI sti •ity clay (soil pe 8)\� \ti Low plus sa dy y cla ty .� are) ■3 o pl clic abo �sqs ty-es LDTL TEST BORING LOCATION ■ S & W, Inc. TEST PIT LOCATION S & W, Inc. TEST PIT (LOGGED & SAMPLED BY LDTL) Numbers on mop are the boring 8 pit numbers given in report SOIL TYPES at 10' below GROUND SURFACE 500 400 300 200 100 0 FEET 250 500 750 1000 Prepared for Colorado Country, Inc. / Thunder River Realty --Basalt, Colo. Topography by Scarrow 0 Walker, Inc. --Glenwood Springs, Colorado THE LINCOLN—DeVORE COLORADO Colorado Springs, Pueblo, Avon -Vail, Gunnison, Glenwood Springs, TESTING LABORATORY WYOMING Rock Springs Montrose. Drawn by EMZ Scale: in= 250 (1:5000) Date: December 1975 Checked by= ti Contour Interva 1' 2 feet Revised