41. Water then flowed through four penstocks to the station below, a total decline of. 42. From the reservoir, a long tunnel leads through the Cobb Range to the penstocks . 43. The penstocks are long and in diameter. 44. The surge tank has been carved from rock and is located from the first penstock . 45. The penstocks provide of hydraulic head and are at a 12.48 percent angle. 46. Penstocks are incorporated into the surface water management systems ( drainage ) of many landfill sites.47. Water is delivered to the station via a wood stave pipeline and Fibre Reinforced Plastic penstock . 48. Feeding water to the penstocks is a long headrace tunnel with a three gate intake structure. 49. Internal Xcel documents show that the penstock was a permit-required confined space work area. 50. The concrete dam contains the penstocks for the powerhouse, which lies directly below the dam.
