348. Itemized Statement of Length and Cost 427 PART VI. _THE PANAMA ROUTE FOR A SHIP-CANAL._ 349. The First Panama Transit Line 429 350. Harbor of Porto Bello Established in 1597 429 351. First Traffic along the Chagres River, and the Importance of the Isthmian Commerce 431 352. First Survey for Isthmian Canal Ordered in 1520 431 353. Old Panama Sacked by Morgan and the Present City Founded 431 354. The Beginnings of the French Enterprise 432 355. The Wyse Concession and the International Congress of 1870 432 356. The Plan without Locks of the Old Panama Canal Company 433 357. The Control of the Floods in the Chagres 434 358. Estimate of Time and Cost—Appointment of Liquidators 435 359. The “Commission d’Etude” 435 360. Extensions of Time for Completion 436 361. Organization of the New Panama Canal Company, 1894 437 362. Priority of the Panama Railroad Concession 437 363. Resumption of Work by the New Company—The Engineering Commission and the Comité Technique 438 364. Plan of the New Company 439 365. Alternative Plan of the New Panama Canal Company 440 366. The Isthmian Canal Commission and its Work 441 367. The Route of the Isthmian Canal Commission that of the New Panama Canal Company 441 368. Plan for a Sea-level Canal 443 369. Colon Harbor and Canal Entrance 443 370. Panama Harbor and Entrance to Canal 444 371. The Route from Colon to Bohio 445 372. The Bohio Dam 446 373. Variation in Surface Elevation of Lake 448 374. The Extent of Lake Bohio and the Canal Line in It 448 375. The Floods of the Chagres 449 376. The Gigante Spillway or Waste-weir 450 377. Storage in Lake Bohio for Driest Dry Season 451 378. Lake Bohio as a Flood Controller 452 379. Effect of Highest Floods on Current in Channel in Lake Bohio 453 380. Alhajuela Reservoir not Needed at Opening of Canal 453 381. Locks on Panama Route 454 382. The Bohio Locks 454 383. The Pedro Miguel and Miraflores Locks 454 384.