Laserfiche WebLink
In 1980, D'Appolonia <br />remedial measures for the cwasrretainedthis <br />byseepage. <br />11 mestake to further evaluate <br />Consulting Engineers, Inc This investi- <br />the cause of the seepage and recommend control mea(bjeconstruction of a <br />gation lead to (a) explanation of seepage rates; <br />cutoff and collection system in the valley downstream from the <br />seepagerouting beneath the dam to evaluate the <br />dam and (c) experimental g The construc- <br />effectiveness of reducing the seepage by this mechanism - <br />tion work was completed in August, 1982• <br />I.2 EMBANKMENT EVALUATION <br />ke requested that he <br />evaluate the stability an <br />Homestake In 1982, The evaluation was conducted based on <br />general integrity of the dam* <br />a about the construction ous investigation; of the dam fravail- <br />data and information ((c) <br />) others during previ <br />{b) collected by cutofflcol- <br />able records; Ionia seepage evaluation studies, <br />obtained during <br />the D'APp° routing; and (d) from <br />nstruction and experiments i te <br />lection system coprimarily tedtopiezometer instal - <br />additional field investigations <br />Chapter 2.0 discusses <br />lations and testing within the dam embankment• <br />the information utilized in the dam evaluation. <br />Using the available and gathered information, D'Appolonia developed a <br />description of the existing conditions within the dam <br />model or physical <br />The conditions were described by the <br />and its suppandorting foundation* the flow <br />apparent strength and in situ conditions and thsoils <br />orelativerresistance of <br />paths and phreatic surfaces of seepage, <br />various soils to erosion (i•e•, piping) due to the observed flow conditions• Chapter 3.0 describes the modeled existing dam conditions, <br />went of an understanding of the existing conditions <br />stability and general <br />With the develop <br />within the structure, the current and projected <br />city of the structure was evaluated* <br />Assessments involved pri- <br />integ <br />dam embankment and its foundation against <br />warily (a) stability of the <br />slope failure; and (b) potential of the embankment and foundation soils <br />a t <br />. �b ,a 4 ,.< <br />