PRO Project Update

Overview

This document will be used to keep an ongoing account of the project progress for the construction and installation of the counting window antennas on the right bank and center ladders at Chandler dam. It should be noted that the BOR does not work on Friday’s because they work a 4-10 schedule.

Project Start Right Bank Ladder

7-18-05

  • Construction - Knight Construction was on site on Monday to begin construction on the right bank ladder. This ladder was chose as the starting point because of the forms that are being used to concrete the opposite antenna housing brackets are taller on this side than they are in the center or left bank ladder. This way they can use the forms and then cut them to size for the other two ladders.
  • Electrical – Site was surveyed for the removal of existing wires and conduit.

7-20-05

  • PSMFC was on site on to meet with Dennis Wisham (Knight Construction) and Richard Corkins “Corkie” (BOR). Pictures were taken of the work that had been completed. PSMFC met with Corkie and discussed the mounting of the two (2) 30 X 30 enclosures for the radio modems and transceivers, the possibility to mount them together on the same wall was discussed but it would depend on moving existing electrical conduits.
  • Construction – The crowder gate structure was removed and replaced.
  • Electrical – Removal of all non essential wires and conduit.

7-21-05

  • Construction – The antenna housings are being installed. While installing the counting window side of the housings it was discovered that there were some objects that would interfere with the antenna installation. On the upstream side there is an “I” beam for the grating that would have to be cut back and re-angled back to the counting window wall. On the down stream side there were two conduits that are mounted on the wall and would not allow the antenna installation. It was decided that the conduits could be moved.
  • Electrical - BOR continued the removal of all unused cabling and wires and conduit. The question was proposed to run the radio antenna cables in one (1) conduit to the lightning arrestor cabinet. PSMFC checked with manufacturer and interference issues and decided to run the cables in separate conduits.

7-25-05

  • Construction – Ongoing.
  • Electrical – Unistrut was put place on east wall in the pit for mounting the two 30 X 30 enclosures and conduit re-routing was completed.

7-26-05

  • Construction – Ongoing.
  • Electrical – Ongoing.

7-27-05

  • Construction – The conduit to be moved can be reused. There was some question on the use of #6 rebar used as the hook threadbar. The print did not call out the material of the threadbar. PSMFC spoke with Dave Knight and the fact that the vertical bar is FRP bar and the hookbar does not physically tie into any existing concrete the concern was put to rest. This is the same procedure that was used in the weir walls for Ice harbor and Granite projects. Mark Johnstone (YIN) was called on site to discuss several issues and after discussing the issue with the “I” beam it was decided that it would be removed and the grating would be changed to accommodate the removal of the “I” beam.
  • Electrical – The placement of the Antenna interconnect enclosures was mapped out. The lightning arrestor enclosure needed to be moved because of the bending radius of the LMR 400 cable. The placement was going to be on the antenna mast for the radio modems but since the LMR could not be placed into an LMB after the core drilling of the concrete Corkie, Mark, and Darren Chase (PSMFC) discussed the placement of the enclosure. It was decided that structure would be put in place to mount the enclosure right above the core drill facing the east next to the air compressor housing. Another issue that was discussed was the conduit being placed on the concrete for the radio antennas and a tripping hazard, it was decided that there was no tripping hazard being created by placing the conduit where needed. Another issue that was discussed was the grounding for the antenna shields, this ladder does not have the grounding pads that the left and center ladders have, PSMFC and BOR decided that a ground from the 480V cabinet ground bus would be ran into the lightning arrestor cabinet to a bus bar and the shield grounds would be connected in this cabinet.

7-28-05

  • Construction – On going.
  • Electrical – The 30 X 30 enclosures were mounted together and mounted to the unistrut. More conduit was removed .

7-29-05

  • Construction – The forms for the concrete were put into place and braced. The concrete was poured, and the forms will be removed on Monday and the “mock” antenna will placed into the guides to check clearance.
  • Electrical – No work performed.

Darren ChasePage 110/10/2018