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<br />002121 <br /> <br />2.1.3 North Side of Del Norte <br /> <br />Concern, <br /> <br />Flooding in the vicinity of the <br />water overflowed from the river at a <br />feet upstream of the~, ridge north of <br />the stream bank and th . possibility of <br />evaluated. <br />t) ..,. ~,,~. It J.... <br />Findings: ".'0'-0 <br /> <br />town park occurred when <br />point approximately 1000 <br />the town. The erosion to <br />a dike needs to be <br /> <br />Water entered the town by overflowing a slough in the south <br />overbank adjacent to the inlet of the Del Norte Ditch No, 4. The <br />period of flooding occurred in about a 6 hour interval during the <br />passage of the peak of the flood. Ten homes and ten businesses <br />were subjected to flooding in addition to the public park and the <br />restrooms in the park, By raising Front Street by about 2 feet <br />for a distance of about 1,000 feet between its intersection with <br />Pine Street and the Park, a low levee could be formed, This low <br />levee would be intended to avoid minor nuisance flooding similar <br />to that experienced in 1985, <br /> <br />The volume of material is estimated at <br /> <br />2 x 50 x 1000 = 3,703 cubic yards. <br />27 <br /> <br />Severe erosion has also occurred to a formerly rip-rapped <br />bank due north of the park exposing the roots and washing out <br />existing rip-rap protection along a 200 foot reach. Continued <br />erosion could contribute to loss of trees, accumulation of debris <br />on the Highway 112 Bridge downstream, and endanger the Town ditch <br />No.4. This area is in the floodway of the river and will <br />continue to be a problem unless heavy armoring of the bank is <br />provided. A short jetty should be placed in the river to keep <br />direct flow from hitting the bank during reconstruction. This <br />jetty would require a 404 permit from the Corps of Engineers. <br />The volume of rip rap material required to repair the bank is <br />estimated at <br /> <br />15' x 3' x 200 = 333 cubic yards <br />27 <br /> <br />Large floods have occurred at Del Norte in 1884, 1905, <br />1911, 1921, 1927, 1948, 1949, and 1973. These floods have caused <br />major damage, disrupting highway and railroad traffic and <br />communication services, drowned livestock, destroyed agricultural <br />lands, roads, bridges and building. <br /> <br />33 <br />