
Tunneling Under Difficulties
Part of the Delaware Aqueduct Was Drilled at Great Depths, Yet Was Finished in Half the Allowed Time

Tunneling Under Difficulties
Part of the Delaware Aqueduct Was Drilled at Great Depths, Yet Was Finished in Half the Allowed Time

Fidgety Atoms Purify Water
Ozone Treatment of Community Supplies Has Proved Efficient in Practical Applications

Water for our Greatest City
Longest Large Tunnel in World Is Deep Aqueduct to Bring More Water to City of New York

Under Mohile River
Vehicular Tunnel Built On Land, Floated Into Place, Shows Engineering Advances

Under the Nieuwe Maas
Unique Tunnel at Rotterdam, For Vehicles, Pedestrians, Cyclists, Rectangular, Sections Built on Land, Then Floated Out and Sunk in Place

More Water for Niagara
A New Weir Raises Water Level in Power Plant, Increased Plant Capacity and at the Same Time Enhanced the Spectacle of the Falls

Grand Coulee Progresses
Monster Dam and Appurtenant Works Will Cost Over 376 Millions, Dimensions, Components, Progress of Work, Difficult Problems Met

Fish Over a Dam
Bonneville Dam, Many Novel Features, Generates Power, Extends Inland Waterways, Greatest Fishways, Fish Can Go Upstream or Down

Farms for the Everglades
Levees, Drainage Canals Permit Reclamation of Mysterious Everglades; Soil Is Black and Rich; Thousands of Acres for New Farms

In, Out, Through New York
Three-Part Tunnel System, New Jersey to Long Island, Under Hudson River, Manhattan, East River, Outstanding Engineering Features

Finishing the All-American Canal
New Canal Replaces Old One that Goes Partly Through Mexico, Water for Two Rich Agricultural Valleys, A Monumental Undertaking

Denmark Bridges

Improved Shore Defenses
Permeable Jetties . . . Better Than Solid Ones . . . Trip Waves Without Stopping Them . . . When Water is Slowed Up, it Deposits Sand, Builds Beaches

Underpinning Trinity
Trinity Tower Was Subsiding, Old Foundation Extended to Bedrock by Monolithic Piers Through Quicksand, Pneumatic Caissons Used

An All-Belgian Canal
Albert Canal, Started 1930, Will Cost About 80,000,000, Be Completed Next Year, Gigantic Engineering Job, Economically Significant

Microscopic Big Books
Books, Documents, Drawings, Newspapers on Tiny Film Read in Projector, System Saves Handling of Originals, Enlarges Libraries, Many Uses

Arcs Cut Under Water
Electric Torch Rips Submerged Metals, Gases Create Working "Hollow", Oxygen Burns Metal Being Cut, Possible Welder, Many Uses

A Mountainous Earthen Dam
Fort Peck Dam, Aid to Navigation on "Big Muddy", 100,000,000 Cubic Yards of Earth in the Dam, Unique Engineering Problems

A Modern Port for Bordeaux
Advance Port at Ocean for French City, Wharf Piers Unique, Built on Land, Floated, Sunk, Engineering Problems, Channel Dredge...

New Caissons Speed Work

Engineers Combat the Sea
New Jersey Studies Coast Erosion, Great Economic Loss, Varied Problems, How Approached, How Solved, Findings Helpful to Others

A Bigger and Better Cape Cod Canal

Tumbling Caissons
Caissons Constructed Upside Down on Ways, Launched, Built Up, Turned Over, Sunk in Clay, Workmen Inside Excavate Water Bed

Flood Control on Ol' Man River
Started 1928, Completion Next Year, Levees Raised, Fuse-Plug Spillways, Floodways Provided, 650,000,000 Cubic Yards of Earth Moved