Monday, July 12, 2010

Where is the flood?

This morning from 10 am to 1 pm we had an additional 0.8 inch of rain for a total of 4 and a half inches this two weeks. At 2 pm I checked the north side of the main wash coming into Oliver's Woods along the north shoulder of highway 9. There was a large lake ponded up below the ropes course and the Aquatic Research Facility.. no current or whirl detectable of flow into the culvert. On the south side of the highway the flow in the eastern wash was moderate. I stepped across it a couple meters above its junction with the western wash. The western wash was deep and flowing fast. It passed by the northern most bur oak fallen across and into the wash without a problem. I crossed there on the tree. At the second bur oak suspended high across the wash (not the Bur Oak Bridge) the western levee wall was 2-3 feet lower across a 5-6 meter gap and this was where a river of water had spilled out to flow across the Woods cutting a channel by the junction of the North Loop and the Trans OWP Trail.

Down by the Elm Bridge the main channel flattened out to become a braided, wide flowing delta with no levee walls. Water was flowing everywhere westward across the SE quarter of the Woods. I imagine water was flowing upstream over the dam. Need another culvert under the southern service road or better, faster drainage from the southern central drainage point of the Woods.

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