FLOOD04566 - Laserfiche WebLink

Home Browse Search

I 20 I I I I I I I I I I I I I I I I I I V. BEAR CANYON CREEK Without Major Flood Storaqe Reservoir 1. NCAR Land. Construct relatively large sedimentation and flood storage ponds in the eastern portion of the NCAR property. These ponds w~uld be landscaped to provide a pleasing appearance and the design could include a permanent pool in each. Opportunities exist for gravel sales and solid waste disposal in connection with this flood and sedimentation operation. 2. NCAR Land to Table Mesa Drive. Channel rectification is required here to provide adequate capacity. It Is contemplated that this channel would be a wide, slow-flow type with appropriate drops and a trickle channel. A width of about 100' would be required. 3. Table Mesa Drive. a. Construct European-type channel to carry tOO-year runoff. Reconstruct all culverts to proper opening sIze. b. Modify existing channel as needed to stabilize, but do not change basic character or capacity. Present culverts would remain. Final capacity would be for about 10-year occurrence. Flows exceeding that would overtop and cause significant street damage and erosion of pavement and curbs and gutters. 4. Broadway. This portion of the channel must be rehabilitated to eliminate any reasonable chance of fai lure in the future. In essence, the culvert would be paralleled with a separate conduit having better sediment and water transport characteristics.'" 5. Broadway to Wellman Canal. a. Reconstruct channel to carry the 100-year flood, channel sections qenerallv being the wide, slow,.type but variations included to suit right-of~ay limitations, Culverts would be replaced or paralleled. Channel variations would include some near-vertical walls. Some right-of-way would be acquired and at least one residence would be taken. b. Modify existing channel as needed to stabilize, leaving character and capacIty as It Is. Enlarge or replace only the completely Inadequate culverts. * Conduit wIll be removed, and replaced with new box culvert.