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301. Train at Himix Concrete Plant -- Hoover Dam site
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302. Close-up of construction site, Hoover Dam.
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303. Constructing highway to dam site
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304. Boulder Canyon
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305. Producing electricity at the construction site
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306. Building Black Canyon Highway to Hoover Dam site
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307. Laying pipe for Boulder City's water supply.
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308. Warehouse under construction
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309. Construction workers at Hoover Dam.
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310. Construction at Hoover Dam
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311. Inside machinery room at Hoover Dam site
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312. Machinery at Hoover Dam site.
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313. Bridge across Boulder Canyon at Hoover Dam site.
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314. Workers on the Colorado River
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315. View of railroad tracks being laid at Hoover Dam site.
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316. View of a power house at the Hoover Dam construction site
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317. Nevada power house at Hoover Dam construction site
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318. Downsteam view of Hoover Dam, showing power house construction
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319. Power house under construction - Hoover Dam site
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320. Intake towers being constructed for Hoover Dam
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321. Nevada intake towers under construction at Hoover Dam
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322. Interior view of a power house -- Hoover Dam construction site
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323. View of power houses being constructed at the Hoover Dam site
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324. Power house under construction at Hoover Dam site
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325. Himix and cement blending plants -- Hoover Dam site
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326. Aerial view of the Hoover Dam construction site looking upstream on the Colorado River
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327. Aerial view of the Hoover Dam construction site looking downstream from the Arizona side
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328. Close-up of no. 3 Arizona intake tower, showing the cylinder gates being placed.
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329. Close-up of the Arizona intake towers, from the high catwalk.
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330. Hoover Dam construction site viewed from the downstream cofferdam
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331. Construction on the Nevada power house
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332. Construction on the Nevada power house in the downstream cofferdam
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333. Construction on the Arizona power house
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334. Construction on the Arizona spillway
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335. Construction on the Nevada spillway
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336. Section of penstock pipe being lifted by cable
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337. Commemoration of the pouring of the second millionth cubic yard of concrete in Hoover Dam
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338. Aerial view of construction on the top of Hoover Dam
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339. Construction workers on the drum gates in the Arizona spillway
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340. Construction on the Nevada spillway
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341. Aerial view of the Hoover Dam construction site viewed from downstream on the Colorado River
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342. Construction on the no. 4 penstock raise
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343. Construction on the Arizona spillway
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344. Construction on the no. 4 penstock raise
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345. Construction on the four intake towers in Hoover Dam
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346. Construction on the Nevada and Arizona power houses in the downstream cofferdam below Hoover Dam
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347. Close-up of the Nevada powerhouse, showing the draft tubes.
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348. Construction on the Nevada power house viewed from the Arizona valve bench
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349. Construction on the Arizona power house viewed from the Nevada valve house bench
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350. Construction on the Arizona spillway and the no. 4 penstock raise in Black Canyon
 

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