Laserfiche WebLink
<br />4-03 Drainage Structures. <br /> <br />a. Operation. Whenever high water conditions impend, all gates will <br />be inspected a short time before water reaches the invert of the pipe and <br />any object which might prevent closure of the gate shall be removed. Man- <br />ually operated gates shall be closed as necessary to prevent inflow of <br />flood water. All drainage structures in levees shall be inspected frequently <br />during floods to ascertain whether seepage is taking place along the lines <br />of their contact with the embankment. Immediate steps shall be taken to <br />correct any adverse condition. <br /> <br />b. Maintenance. Adequate measures shall be taken to insure that in- <br />let and outlet channels are kept open and that trash, drift, or debris is <br />not allowed to accumulate near drainage structures. Manually operated gates <br />on drainage structures shall be examined, oiled, and trial operated at least <br />once every 90 days. Periodic inspection shall be made by the superintendent <br />to be certain that: <br /> <br />1. Pipes, gates, operating mechanisms, riprap and headwalls are <br />in good condition; <br /> <br />2. inlet and outlet channels are open; <br /> <br />3. care is being exercised to prevent the accumulation of trash <br />and debris near the structures and that no fires are being built near bitu- <br />minous coated pipes; <br /> <br />4. erosion is not occurring adjacent to the structure which might <br />endanger its water tightness or stability. <br /> <br />Immediate steps will be taken to repair damage, replace missing or <br />broken parts, or remedy adverse conditions disclosed by such inspections. <br /> <br />4-04 Closure Structures <br /> <br />a. Operation. Whenever high water conditions impend, preparation for <br />sandbag closure of the AT&SF Railroad and the State Highway 385 bridge approaches <br />shall begin. Actual erection of the closures shall be started in sufficient <br />time to permit their completion before flood waters reach the roadway eleva- <br />tion. The sandbag closure shall be high enough to connect the tops of the <br />levees, if required, and sufficiently thick (see Plate 2) to preclude their <br />being washed away. Sandbag closure structures will be inspected frequently <br />during flood periods to ascertain that no undue leakage is occurring. <br /> <br />b. Maintenance. The superintendent shall insure that sufficient ma- <br />terials are on hand for the erection of sandbag closures and that the location <br />of such materials will be readily accessible in times of emergency. <br /> <br />-10- <br />