This is an extraction from some of our ongoing and completed projects. The complete reference list to our projects and milestones can be found in the norwegian version of our site.

 

JAN 2014 – JUN 2015:

Coco Codo Sinclair Hydroelectric project in Equador

Coca Codo Sinclair Hydroelectric Project in Equador is the largest energy project in Equadors history. Located in the Amazon basin, the 1500 MW project will be a run-of-river in the Coca river. Any water diverted from the intake will pass via a 120 m long sedimentation basin made up of 40 desanders able to remove more than 5 millions of sediments a year. GEOTEX has fabricated 41 Eccentric Gates to manage the desanders, all with no-wear gaskets and rapid cycles for opening and closing.
Our gates were put into operation by Equadors Vice President Jorge Glas Dec. 16 2015. See the video.

Back to top

 

MAY 2012 – MAR 2014:

Emergency Shut-down Eccentric gates

The need to shut down water in case of a bursting pipeline from an intake basin made GEOTEX invent a solution based on the Eccentric gate enabeling the gate to fall down to complete closing within seconds – without wear, tear or destruction to gate gaskets. A sensor in the pipe gives information to a PLC which automaticly closes the gate by operating a linear actuator for 8 seconds. The power demand is only 70 Watts. The system is fully mechanical and hence has no problems with sinking hydraulic cylinders. Emergency shut-down Eccentric gates were made available in sizes from Ø/square 930 mm up to 4930 mm.

Back to top

 

MAY 2008 – NOV 2008:

Closing Gate for Statkraft, Kobbvatn in Norway

The project included design and production of a gate for downstream tigthening in a harsh mountain environment without road or other facilities. Mounting had to be done by lifting assistance from a small 4 tonn excavator, the only machine which could be transported to site. Gate size; 5,2 metres wide and 2,2 metres high. Weight 2 500 kg. All transportation by helicopter.

Back to top

 

OCT 2005 – 2012:

Small Hydro Power in Norway

GEOTEX made a mechanical package needed for all small hydro power intakes : intake gate, bottom outlet gate, trash racks, intake cone built together with outlet pipe and aireating funnel. On top of the aireating funnel GEOTEX introduced a box-outlet with an inspection window instead of a goose-neck with solid walls. This hinged inspection window was the first shown in industry, and has proven to be of great help under careful filling of gate, and for inspection of ice in funnel – and access to ice removal.

Back to top

 

MAY 2005 – OCT 2007:

Replacement of a weir gate 25-32 metres under water, Narvik

This was GEOTEX’ second project to replace a unfunctioning gate under water in a basin that could not be emptied. A “Red Adair” project to save a large city from being without sufficient water for a period of 10 months. The old gate was feared to fall to closing position without warning since the mechanism was under high tension. Customer Narvik Municipality, dep for water.

Back to top

 

MAY 2002 – JUN 2002:

Emergency production of a bottom outlet gate for Statkraft

This very important and time-critical production was initiated by a stonefall in a high and very remote intake in Kobbelv power plant (The Eagles Nest). The intake is very important for the power production, an the replacement gate had to be fabricated very quickly. The company solved the task by a two shift production, and Statkraft wrote in a thanking letter that «the gate was fabricated in a very energetic way, and we will give the company our best recommendation».

Back to top

 

FEB 2001 – NOV 2001:

Cabardasjohka, Kautokeino, Sapmi. Nord-Troms Kraftlag AS (now: Ymber AS)

The project included design of 4 Eccentric gates all with different widths around 5 metres and height of 2,5 metres. 4 more large gates were refurbished. All gates manoeouvred by large screw jacks.

Back to top

 

MAY 1997 – SEP 1997:

Worlds first known replacement of an intake gate under water. Tromsø municipality

GEOTEX made an underwater replacement of a intake gate under water possible by using their own invention; the Eccentric Gate in a main basin for drinking water in a waterdepth of 17 metres. A very demandig operation solved by divers and innovative solutions to sudden other problems evolving in material from 1912.
A procedure failure would made the largest city in Arctic free of drinking water for 10 months. A high degree of confidence was awarded our company. (The second underwater replacement of a gate under water was done by Ruhrverband 6 years later).

Back to top

 

JAN 1997 – JUN 1998:

Change of two highly pressurized gates in Finnmark for Varanger Kraft AS

This project included project design of two gates, each 2,3 x 2,3 metres x 19,5 mVc and 1,75 x 2,3 metres x 15,95 mVc. Highest load is 108 tonnes. The installation had to be done in a 32 metres deep pit/ 15 metres.

Back to top

 

JUN 1995 – AUG 1996:

Design, production and installation of 16 large spillway gates for Statkraft

Statkraft engaged GEOTEX to undertake a total responsibility for design of a solution to their problems related to sudden snowmelting in the inner parts of the Altefjell mountains in Troms. 16 eccentric gates were fabricated and installed without any need for cement grouted steel sealings on the dam walls. Gate size were all aporoximately 2.2 metres by 2.4 metres.

Back to top

 

JUN 1986 – OCT 1986:

First GEOTEX Eccentric gate produced and installed

A large stone-lavine had rushed down into Storfjord municipalitys water intake. The original intake gate could not be closed as it was completely damaged. The situation was difficult as a large laundry, cleaning clothes for North-Norways largest hospital was free of water – and the hospital was about to close. A large flow of water thorugh the outlet made all concrete grouting of sealing members on the dam wall impossible. The solution was a gate that could be lowered down without damaging the gate sealings – which had to be able to close direct against the coarse concrete surface. The solution was the Eccentric Gate which vas patented afterwards.

 

---

Back to top