美西南巨环之旅（十五）葛兰峡谷大坝Glen Canyon
前文提到包伟湖(Lake Powell)是在享有盛名的科罗拉多河上筑坝截流形成的，葛兰峡谷大坝(Glen Canyon Dam)便是这个利用此地葛兰峡谷的自然条件，在峡谷两岸垒起的大坝。大坝始建于1956年，完工于1966年，这座大坝造价不菲，达到15亿多美元。大坝建好后开始关闸蓄水，拦截了科罗拉多河的河水，所形成的人工湖就是美丽的Lake Powell。由于体积巨大，1963年开始一直蓄水17年，直到1980年才将此湖添满，现在是美国第二大人工湖。
葛兰峡谷大坝是美国第二大人工湖水坝，仅次于胡佛水坝，高达216米，拱形的顶部长达470米。大坝的建成，使水力发电和水利调节成为现实，但大坝的建成也对当地的动植物群有影响，因而也饱受质疑。大坝以科罗拉多州的美好风景为背景，建于亚利桑那州的科罗拉多河上，河水走向的两岸，都是红砂岩，和科罗拉多大峡谷的景观一脉相承。弧形的拱桥飞架南北，架在峡谷两岸的悬崖上，而河水正从桥下那陡峭的峡谷里左拐右弯缓缓流过。气势恢宏的葛兰峡谷大坝配合着悬崖峭壁的红崖荒野，蜿蜒伸展的碧绿湖水，好一派壮美的景观。
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葛兰峡谷大坝是美国第二大人工湖水坝，仅次于胡佛水坝，高达216米，拱形的顶部长达470米。大坝的建成，使水力发电和水利调节成为现实，但大坝的建成也对当地的动植物群有影响，因而也饱受质疑。大坝以科罗拉多州的美好风景为背景，建于亚利桑那州的科罗拉多河上，河水走向的两岸，都是红砂岩，和科罗拉多大峡谷的景观一脉相承。弧形的拱桥飞架南北，架在峡谷两岸的悬崖上，而河水正从桥下那陡峭的峡谷里左拐右弯缓缓流过。气势恢宏的葛兰峡谷大坝配合着悬崖峭壁的红崖荒野，蜿蜒伸展的碧绿湖水，好一派壮美的景观。
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