Renewable Energy Technology Assessments - Kauai Island Utility ...

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Kaua’i Island Utility Cooperative Renewable Energy Technology Assessments 9.0 Wind 9.3.3 Area #3: Waialeale South Ridge This area is a ridge extending up to the peak of Mt. Waialeale. This site is located in a natural area and wind power may not be compatible with this land use. A project in this area would be expensive to construct due to lack of roads and steep terrain. However the ridgeline resource here is excellent, with Class 6 and 7 winds which yield an estimated capacity factor of over 40 percent and theoretical space for over 100 MW of capacity. It may be expensive to extend transmission to this area. Land ownership in this area is mixed. Due to the inaccessibility and untouched nature of the area, Black & Veatch ranked this site as a “low” priority for further investigation. 9.3.4 Site #4: Kuahua This area is similar to the Waialeale South Ridge area; it is a remote ridge high on Mt. Waialeale with expensive construction and transmission access. The wind resource is slightly less and the access may be slightly better than Waialeale South Ridge. The land is owned by the Robinson family. Due to the inaccessibility, single landowner, and untouched nature of the area, Black & Veatch ranked this site as a “low” priority for further investigation. 9.3.5 Site #5: North of Hanapepe This area is similar to areas 3 and 4 in that it is a ridgeline on the south slope of Mt. Waialeale with exceptional wind resource. Construction on the ridgeline may be difficult and transmission would have to be extended two or more miles to reach the project. The wind resource is considerable though, according to the wind map, with wind Class 5 to 7. A capacity factor of 36 percent is estimated at the anemometer site based on Black & Veatch analysis of available wind data. Capacity factors in excess of 40 percent are likely further up the ridge. Development could begin at the bottom of the ridge and expansions could potentially extend further up the ridge to a theoretical potential of around 100 MW capacity. Data has been collected at the southern end of the ridge. Due to the difficult access, but abundant wind resource and available data Black & Veatch ranked this site as a “moderate” priority for further investigation. 9.3.6 Site #6: Kokee There is a pocket of good wind resource straddling Highway 550 west of Waimea Canyon in Puu Ka Pele Forest Reserve. The existing road is promising for allowing construction, but the terrain may still present construction issues. The wind map indicates about 15 to 20 MW potential with Class 5 and 6 winds yielding an estimated capacity factor of 35 to 38 percent. Extending transmission lines to this area may be prohibitive, 21 March 2005 9-8 Black & Veatch
Kaua’i Island Utility Cooperative Renewable Energy Technology Assessments 9.0 Wind but existing distribution lines do exist. This site may be well suited for distributed generation up to the capacity of the distribution line (2 MW has been assumed). Visual impact may be a concern due to the site’s proximity to the scenic highway, Waimea Canyon, and Kokee State Park. Due to the good resource and accessibility of this area, Black & Veatch ranked this site as a “moderate” priority for further investigation. 9.3.7 Site #7: Kalalau The high ridgelines around the Kalalau valley have some of the best wind resources on Kauai. However, this area is remote and scenic, and construction access is difficult, if not impossible. It is deep in a natural area and wind power is probably not compatible with this land use. This area may be prohibitively far from transmission and extending lines could be challenging. However, the wind resource here is excellent with Class 6 and 7 winds having an estimated capacity factor in excess of 40 percent and theoretical space for hundreds of megawatts of capacity. The land is owned by the state of Hawaii and is part of the Na Pali Kona Forest Reserve. Due to the inaccessibility and untouched nature of the area, Black & Veatch ranked this site as a “low” priority for further investigation. 9.3.8 Site #8: Anahola This area is on Mt. Puu Ehu near Anahola. Roads and transmission would likely need to be expanded to develop this site but, the extension would not be prohibitive. Construction on steep terrain may be a concern. The wind map indicates about 25 to 30 MW potential with Class 4, 5 and 6 winds yielding an estimated capacity factor of 34 percent based on Black & Veatch analysis of available wind data. It is understood that there may be local interest and support for a wind project at this site, which can be a big asset for project development. Wind data is available for a location near this site. A small portion of the project site is Hawaiian Home Lands and the remainder is state land (Molona Forest Reserve). Due to the good resource, available data, and potential political support Black & Veatch ranked this site as a “high” priority for further investigation. 9.3.9 Site #9: Poipu The area around Poipu on the south of the island is similar to the first area, Kalaheo, in that it has low lying, reasonably flat terrain facilitating ease of construction. The area is one of the principal tourist locations on Kauai and is experiencing rapid development. Wind speeds on the wind map are lower than at Kalaheo with mostly class 3 and 4 winds yielding an estimated capacity factor of 30 to 33 percent. The windiest sites, according to the wind map, are along the coast which is further from transmission 21 March 2005 9-9 Black & Veatch
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11401 Lamar Black & Veatch Corporat
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Principal Investigators: Ryan Pletk
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Kaua’i Island Utility Cooperative
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