Archive

22 Jul

Posted at 21:37h in by

Gracon was contracted to perform an inspection and complete overhaul of the Lowline Unit in Kimberly Idaho. Project included inspection and overhaul of a 2.8 MW Voith Horizontal “S” Kaplan Turbine and Siemens Allis Generator, overhaul of the Kaplan Turbine including the refurbishment, repair, and...

22 Jul

Posted at 21:16h in by

The Strontia Springs Dam reservoir’s emergency reservoir drawdown system (ERDS) rapidly releases water in an emergency scenario through a 50 foot long tunnel that runs through the base of the dam. The thrust nut on the ERDS control gate was damaged and required replacement 200...

16 Jul

Posted at 15:45h in by

This project consisted of generator disassembly and reassembly. The generator was lifted out of the powerhouse by crane and transported to our subcontractor for rehabilitation. The bearings attached to the generator were refurbished and reinstalled concurrently. When rehabilitation was completed, it was transported back to...

16 Jul

Posted at 14:14h in by

The unit, put in service in 1985, was experiencing leakage of oil out of its servo tube assembly, which provides a path for oil to be distributed from the Kaplan oil head to the runner hub to control the pitch of the 4 turbine blades....

16 Jul

Posted at 14:04h in by

[vc_row css_animation="" row_type="row" use_row_as_full_screen_section="no" type="full_width" angled_section="no" text_align="left" background_image_as_pattern="without_pattern"][vc_column][vc_column_text][/vc_column_text][vc_column_text]Gracon replaced the aging electrical and mechanical infrastructure at the Roberts Tunnel East Portal, near Grant, CO. This $10M project includes upgrading the existing electrical systems with three new switchgear units which will transfer electrical power from the...

03 Jan

Posted at 16:13h in by

[vc_row css_animation="" row_type="row" use_row_as_full_screen_section="no" type="full_width" angled_section="no" text_align="left" background_image_as_pattern="without_pattern"][vc_column][vc_column_text][/vc_column_text][vc_column_text]Gracon was a subcontractor for the refurbishment of two Liquid Rheostat Pony Motor Starting rheostats.  This included the disassembly, blasting and painting, and installation of the new owner furnished internal electrodes and wiring to the control room.[/vc_column_text][/vc_column][/vc_row]...

03 Jan

Posted at 15:52h in by

[vc_row css_animation="" row_type="row" use_row_as_full_screen_section="no" type="full_width" angled_section="no" text_align="left" background_image_as_pattern="without_pattern"][vc_column][vc_column_text]Gracon was awarded this contract to repair cavitation damage on Diablo Powerhouse’s Hydro-Generator #32 turbine runner. Gracon is partnering with Cutting Edge Onsite Machining to safely remove the cavitation damage and re-weld new filler material in place on the 146” diameter...

06 Nov

Posted at 22:18h in by

[vc_row css_animation="" row_type="row" use_row_as_full_screen_section="no" type="full_width" angled_section="no" text_align="left" background_image_as_pattern="without_pattern"][vc_column][vc_column_text][/vc_column_text][vc_column_text]The project involved converting an abandoned hydroelectric plant that was set up for a Flygt flooded pit type turbine into a Z-turbine. The existing technology was outdated and inefficient. Gracon replaced the turbine generator and switchgear with a...