Laserfiche WebLink
<br />I <br />I <br />I <br />I <br />m <br />I <br />I <br />m <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Lower Big Dry q:;reek Hydrologic Study <br /> <br /> <br />candidate for revegetation, with property oler willingness to consider controlling horse access <br />to this erosion-prone parcel. The owner is dpen to innovative ideas and would be interested in <br />participating in a possible demonstration projbct. <br /> <br />6.6 Ira Property <br /> <br />Big Dry Creek on the Ira property is an actively meandering channel with numerous bends. that <br />are eroding to widen the channel and form ptnt bars and oxbows. Large reaches of streambank <br />I <br />have sloughed off in multiple locations. fu some locations, terraces have formed that are <br />beginning to revegetate, where other areJs have not yet had time to revegetate. Steep, <br />unvegetated cut-banks characterize the streJ in most locations on the Ira property, with heights <br />around 12-14 feet in some locations and htghts around 4-5 feet being common. In several <br />locations, fences had been washed out. In bne location (shown in an Appendix B photo), the <br />extent of lateral erosion on one bend appeare1 to be at least 4-5 feet, as evidenced by a fence post <br />in the stream. <br /> <br />In addition to general erosion, the primary concern of Ms. Ira is access from her home to her <br />horse corral across a timber bridge that wds damaged in the 2004 flood. About 4-5 feet of <br />embankment on the west end of the bridge wkshed out following the flood. Although foot aecess <br />is possible, vehicle and horse access is no loJger possible. The bridge itself is still intact, but the <br />embankments are eroded. Ms. Ira recalled tJat the last time the bridge washed out was in about <br />1995. Much of the erosion and channel acti+y was attributed to the storms of 2004, but Ms. Ira <br />recollects that the last two years seem to have been particularly active. She reported that the <br />stream had been out of its banks about six tiJes last year. <br /> <br />Another area of erosion is on the outside bld near her out-buildings. Broken concrete chunks <br />have been placed against this bend to try to Jntro1 this erosion. <br /> <br />The corral area on the inside bend of the ~eek is generally denuded, but the remainder of the <br />property is vegetated and used as horse pasture. Several different species of birds nesting along <br />the creek bank were observed. Turtles and sJall fish are commonly observed in the creek. <br /> <br />971-179.092 <br />June 2005 <br /> <br />Page 46 <br /> <br />Wright wrr Engineers. Inc. <br />