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<br />001851 <br /> <br />2.1. 1 <br /> <br />Dike West of Del Norte <br /> <br />Concern: <br /> <br />The dike on t.he south bank of <br />Norte was partially breached during <br />this dike were to fail. the town <br />considerable tlooding. A request <br />overall condition. <br /> <br />the Rio Grande west of Del <br />the peak of the flood. If <br />of Del Norte would sustain <br />was made to evaluate its <br /> <br />Findings: <br /> <br />This approximate 30 foot wide levee was part of a "Critical <br />Area ,!'reatment" (CAT) sponsored by the Soil Conservation Service <br />(SCS) in the late 1970's. The material for the heavily riprapped <br />bank and levee is reported to have come from the Rio Grande Canal <br />Company (RGCC) quarry. which is nearby. The RGCC was apparently <br />the entit.y that. managed construction with SCS funding. The <br />diversion structure for the Rio Grande Canal is located <br />approximately 1 mile north east of the site. The headgate of the <br />Del Norte Town ditch is located at the upstream end of the CAT. <br />Leakage through the embankment near the headgate was observed <br />during the inspection. <br /> <br />Erosion over approximately a length <br />of the bank has removed from 2 to 5 feet <br />the top of the levee. Floating debris has <br />of the bank. <br /> <br />of 350 feet on the <br />(average 4.0 feet) <br />accumulated on the <br /> <br />top <br />off <br />top <br /> <br />The volume <br />4 x 30 x 350 <br />27 <br /> <br />of material <br />= 1556 cubic <br /> <br />removed <br />yards. <br /> <br />is <br /> <br />estimated <br /> <br />to <br /> <br />be <br /> <br />about <br /> <br />AlJproximately half of the removed material appears to be <br />present on the site just east of the levee. <br /> <br />I <br /> <br />opprox. 350 -r=T ~1 <br /> <br />t 5' <br />. ------------__________f__________ <br /> <br /> <br /> <br /> <br />t <br /> <br />!leI Node <br />r:,,,,,,ti,kit <br /> <br />SECTION ALONG LEVEE <br /> <br />27 <br />