Show t 1 r- r Letter to t the Editor The Open Trenches Why dont don't they go away With the Installation of the new water mains In ManU Manti we have some open trenches to be backfilled not The big reason they are backfilled is rock and boulders Fillmore had the same problem problem problem lem last year only the boulders were larger and the trenches were bigger In order to find finda a responsible contractor It was necessary to call for sealed bids and specifications were written to spell out what was required of ot the contractor In order to install the pipe correctly It must be embedded in an earth fill r r e of rock Large rock should not come In contact with the pipe The undoubtedly specify the maximum size of rock permitted permitted permitted per per- to be used to bed the pipe If a large rock touches and dents the pipe it could r reduce duce the effective size of the pipe and reduce the designed flow in the pipe In some cases where the pipe was improperly in installed installed installed in- in stalled a rock pressing against the wall of pipe has worn a ahole ahole ahole hole In the pipe by the water flowing through the pipe and setting up a vibration and rubbing rubbing rubbing rub rub- bing the pipe against the rock on sprinkler Irrigation In order to lo guarantee proper installation of the pipe the en engineering engineering engineering en- en firm wrote up specifications specifications how the pipe was to be installed The specifications will spell out the maximum size of rock that will be permitted permitted permitted per per- In the bedding material around the pipe 0 H in order to oe De sure me the ne work is done properly the engineering engineer engineer- ing firm must appoint a qualified fled fied Inspector to see that the job is acceptable to the town board an and the citizens of Manti ManU With the proper installation of the bedding material around the new pipe and proper backfill backfill back back- fill ill the Manti water users can hope for many years of service from our new water system With improper installation the repairs could be frequent and costly Vernon J. J Larsen |