The Ohio Power Siting Board on March 9 signed off on an amendment of its May 2013 approval of the 799-MW Oregon Clean Energy LLC combined-cycle project, located in a Toledo suburb.
In October 2014, the board granted an application from the company to amend its certificate to permanently relocate the electrical switchyard to a 7.5 acre parcel of land adjacent to the current property and add a temporary construction trailer and parking lot on land adjacent to the current property. Then on Feb. 10, Oregon Clean Energy filed another application requesting approval for multiple modifications to the project.
Oregon Clean Energy (OCE) proposed eight modifications.
- First, it proposed to use ultra low nitrogen oxide (NOx) combustors, instead of dry low NOx combustors as part of air quality impact minimization. This modification was proposed as a result of advancements in the technology.
- Second, Oregon Clean Energy noted that the original application provided that a 20 to 345 kV step-up transformer would be used for each of the three generators. In the amendment application, OCE clarified that the generator voltage will be 19 kV instead of 20 kV and that the voltage level is standard for Siemens equipment of this size.
- Third, OCE stated that, in the original application, the facility’s fire protection/ detection system would require a 50 gallon, double containment oil storage tank. In its amendment application, OCE noted that the estimated size of the oil storage tank could be up to 500 gallons.
- Fourth, OCE noted that, in the original application, it indicated two stream crossings would be required for access. One stream crossing was expected via a 24-foot access road, and the other crossing was expected via a 16-foot access road. OCE explained that these access roads are anticipated to be widened to 30 and 20 feet, respectively, and that the Army Corps of Engineers’ Nationwide Permit No. 39 reflects this proposed design.
- Fifth, OCE explained that the original application stated that one of the buildings to be included at the site was a 16-cell cooling tower placed in a double-wide arrangement. OCE explained that, under the amendment, the proposed cooling tower would be composed of 11 cells in a single row arrangement.
- Sixth, OCE indicated that the original application provides that two electric fuel preheaters would be used to provide a maximum input capacity of 6.6 million British thermal units (MMBtu)/hour. OCE noted that, under the amendment, the fuel would be heated based on utilizing water from the heat recovery steam generator rather than direct firing of natural gas. The maximum heat input is estimated to be 27.3 MMBtu/hour.
- Seventh, OCE stated that the original application provided that, because the cooling tower is located very close to the site boundaries, a 16-foot tall sound wall would be located along the northern property and stack silencers would be incorporated to reduce noise levels associated with operation. In its amendment, OCE said it has been determined that these measures would not be necessary to meet noise guarantees because the tower is of a low noise design.
- Eighth, board staff found that, in a supplement to the original application, OCE indicated the center would require 135 million cubic feet (MMcf)/day of natural gas. Staff noted that the fuel consumption is dependent on various factors such as the load profile of the facility, fuel temperature, and fuel density. Based on the latest data from Siemens, at maximum output, the value would be approximately 150 MMcf/day. OCE previously indicated that it was pursuing a tolling transaction with potential purchasers of capacity and energy from the project. As a result, it would not be directly acquiring fuel commodity and transportation. Staff reported that the facility will be receiving gas from a pipeline connection with North Coast Gas Transmission (NCGT) and that the pipeline will be owned and operated by NCGT. An application for the pipeline project was approved by the board on Jan. 6.
The board website, by the way, officially classifies this project as under construction.