Foundation Engineering, Inc.Professional Geotechnical Services <br />FILE:FIG 1D - FAULT MAP (12-9-25).dwg <br />Dec. 9, 2025 <br />PROJECT NO. <br />FIGURE NO. <br />DRAWN BY:DATE: <br />QUARTERNARY CRUSTAL FAULT MAP <br />THE MARK AT EUGENE <br />EUGENE, OREGONBKR2251077 <br />1D <br />SLIP RATE <br />>5mm/year <br />1.0-5.0 mm/year <br />0.2-1.0 mm/year <br /><0.2mm/year <br />TIME OF MOST RECENT SURFACE RUPTURE <br />Holocene (<10,000 years) or post last glaciation (<15,000 years); <br />no historic ruptures in Oregon to date <br />Late Quaternary (<130,000 years; post penultimate glaciation) <br />Late and middle Quaternary (<750,000 years) <br />Quaternary, undifferentiated (<1,600,000 years) <br />Class B structure (age or origin uncertain) <br />TRACE <br />Mostly continuous at map scale <br />Mostly discontinuous at map scale <br />Inferred or concealed <br />STRUCTURE TYPE & RELATED FEATURES <br />Normal or high-angle reverse fault <br />Strike-slip fault <br />Thrust fault <br />Anticlinal fold <br />Synclinal fold <br />Monoclinal fold <br />Plunge direction of fold <br />Fault section marker 731-2 <br />781-2 <br />DETAILED STUDY SITES <br />Trench site <br />Subsuction zone study site <br />CULTURAL AND GEOGRAPHIC FEATURES <br />Divided highway <br />Primary or secondary road <br />Permanent river or stream <br />Intermittent river or stream <br />Permanent or intermittent lake <br />MAP LEGEND: <br />NOTES: <br />1. PORTION OF MAP BASED ON MAP OF QUATERNARY FAULTS AND FOLDS IN OREGON <br />(PERSONIUS ET AL., 2003). <br />2. SEE SITE-SPECIFIC SEISMIC HAZARD STUDY FOR A DISCUSSION OF LOCAL FAULTING. <br />3. FAULTS: #719= SALEM-EOLA HILLS HOMOCLINE; #862= UNNAMED FAULTS NEAR SUTHERLIN; <br />#863 = UPPER WILLAMETTE RIVER, #869 = CORVALLIS, #870 = OWL CREEK; AND #887= <br />UNNAMED SIUSLAW RIVER ANTICLINE. <br />4. MAP IS NOT TO SCALE. <br />SITE