FLOOD03288 - Laserfiche WebLink

Home Browse Search

6.7 Long Term Maintenance 6.7.1 When - Every 3 to 5 years, dependinq upon how often it floods. Also dialer tape r'~progra=ing "dll have to be done when ever there are personnel changes. 6.7.2 Tasks 6.7.2.1 Shelter and stilling ~lell. a. Touch up the paint on t:he shelter with Rustoleurn or equivalent corrosion resistant: pain't. b. Touch up the staff gage paint:. 6.7.2.2 Reprogram Dialer Tap'~s a. The dialer tape~; need 1:<) be reprogrammed any t:ime a per- son is added or if there is a personnel change. b. Follow the instructions supplied with the 618 progra:mmer for Dialer. 6.7.2.3 Flood situation Phone Lis.t - Call everyone on the list of phone numbers and make sure tha.t the numbers are still current. Add, change ('1: delet,a phone numbers as neces- sary. Include the rainfall and stream observer list in this verification exercisE~. 6.8 Phone Line Maintenance Phone line maintenance is t:he responsibility of the phone company. 6.9 Resetting Floats and stil.t:ion Levels 6.9.1 Policy And Procedure For Rese'tting Float Levels 6.9.1.1 Reason for Current s,~t:tings The initial float levels listed in Table 2 were set based upon the hydraulic and hydrologic models and the site condi- tions. The low float should bE~ se't no closer than 1 foot up from the bottom of the stilling IITell. Enough space between the floats was left to establish a rate of rise. The rise times between floats, listed in Table 3, are based upon those settings. If needed, the levels can be varied slightly with- out greatly changing the effE!ctiveness of the flood alarm system. Large changes will invalidate Tables 3, 4, 5 and 6. The middle float may be moved, anywhere be.tween the upper and lower floats, as long as :L-I: doesn't interfere IITi 1:h the op- eration of either float. 6.9.1.2 Reasons to reset the floats may become apparent after several floods have occurred. It may be discovE!red that too many "nuisance" alarms are received from the lower float. Raising the float a few inch,,,s may reduce the unwanted calls, A need for even greater warning time, on the other hand, might require a floa1: to be lowered. 6.9.1.3 A log book should be },ept.. for each gage t:o develop an operation and maintenance hist:ory for each installation. The data can be used to determi:I1E~ if the initial float settings should be changed, See Part 7.2. 6.9.2 station Levels 6.9.2.1 Reason: If the stHl:Lng well moves up or down on its' mountings to the bridg,,, pier, the float elevations will change relative to the stream.. If enough movement (several inches) were to occur , it would change t:he flood response of 24