Bartlett Dam

The Bartlett Dam is a concrete multiple-arch buttress dam on the Verde River, located 50 km northeast of Phoenix, Arizona. The dam creates Bartlett Lake and its primary purpose is irrigationwater supply. It was the first dam constructed on the Verde River and the first of its type constructed by the U.S. Bureau of Reclamation. It was built between 1936 and 1939. It was named after Bill Bartlett, a government surveyor.^[1][2] It was listed on the National Register of Historic Places in 2017.

In response to the Great Depression and subsequent drops in crop prices, farmers struggled harder to have a dam constructed on the Verde River.^[1] Finally, in 1935, the Salt River Project received approval to build the Bartlett Dam. The U.S. Bureau of Reclamation constructed the dam between 1936 and 1939, in a total of 1,000 days.^[2] Upon completion, the dam was the tallest multiple arch buttress type in the world at the time.^[3] 80% of the funding for the dam was provided by the Salt River Project (SRP) and 20% by the Bureau of Indian Affairs.^[4] Construction on the dam provided needed jobs and flood control on the river. Although flood waters temporarily halted construction in February 1937, flooding was finally minimized with the construction of the dam. The next large flood in the area would not come until the winter of 1965–66.^[5]

Because of safety concerns, the dam was later modified during the mid-1990s by the Bureau of Reclamation. Beginning in March 1994, the dam was raised 21.5 feet (6.6 m) and subsequently, its service spillway was modified as well to accompany the new height. An unlined auxiliary spillway was also constructed about 1,500 feet (460 m) south of the dam's left abutment. The new spillway consists of a concrete control structure and a three-segment fuse plug which is designed to erode in specific stages during flooding. The modifications to the dam were complete in December 1996.^[6]

يتكون سد بارتليت من 10  أقواس و9  دعامات، ويحيط به  سدان جانبيان من نوع السدود الخرسانية. ^{[ 7 ]} قبل تعديله، كان ارتفاع سد بارتليت 87 مترًا (287 قدمًا) ويحتوي على 139,000 متر مكعب (182,000 ياردة ^مكعبة ) من الخرسانة. ^{[ 6 ]} بعد تعديله في منتصف التسعينيات، أصبح ارتفاع السد 94 مترًا (308.5 قدمًا) ، ومصنوعًا من 171,087 مترًا مكعبًا (223,773 ياردة ^مكعبة ) من الخرسانة، ويبلغ طوله 251 مترًا (823 قدمًا) . يتراوح عرض قوس السد من 2.3 متر (7.5 قدمًا) عند قاعدته إلى 1.4 متر (4.5 قدمًا) عند قمته. ^{[ 8 ]}                

تبلغ سعة خزان بحيرة بارتليت ، الذي أنشأه السد ، 178,186 فدان-قدم (219,789,000 متر مكعب ⁾ عند منسوب المياه السطحية الطبيعي البالغ 1,798 قدمًا (548 مترًا) . ويغطي الخزان مساحة 6,160 ميلًا مربعًا (16,000 كيلومتر ^مربع ) ، وتبلغ مساحة سطحه 2,700 فدان (11 كيلومترًا ^مربعًا ) . وتبلغ قدرة تصريف مخرج السد 2,400 قدم مكعب /ثانية (68 مترًا ^مكعبًا /ثانية) . عندما يكون الخزان عند أقصى ارتفاع للمياه يبلغ 1821 قدمًا (555 مترًا) ، فإن قناة الخدمة لديها سعة 287500 قدم مكعب /ثانية (8140 مترًا ^مكعبًا /ثانية) بينما يمكن لقناة المساعدة تصريف ما يصل إلى 261700 قدم مكعب /ثانية (7410 مترًا ^مكعبًا /ثانية) . ^{[ 9 ]}                  

• سد بارتليت التابع لشركة SRP
• مكتب الاستصلاح – سد بارتليت
• السجل التاريخي للهندسة الأمريكية (HAER) رقم AZ-25، " سد بارتليت، نهر فيردي، ضواحي فينيكس، ماريكوبا، أريزونا "