20 



Two Bridges with but One Approach 



TWO bridges that use the same 

 right-of-way present a study in 

 economy that may be seen at Pasadena, 

 CaHfornia. Both bridges are of rein- 

 forced concrete, and both are for vehicu- 

 lar travel, each entirely independent of 

 the other. The small bridge, running 

 lengthwise, is directly underneath the 



The bridge that spans this picturesque streami 

 has two rights of way, one for the dwellers on 

 the plateau and one for those of the valley 



Popular Science Monthly 



ly, was built at the expense of private 

 property party owners. It is composed 

 of one long span and two short ones, 

 and, including approaches, is about three 

 hundred feet long. Built directly under- 

 neath the large one, it is designed to 

 bridge the stream channel only. Owing 

 to the skeleton-like construction of the 

 piers of the great structure overhead, 

 one of its approaches pass- 

 es through one of these piers, 

 and the roadway leading 

 thereto pierces still another. 

 The purpose of this small 

 bridge, thus located, is to 

 serve the property owners 

 who reside on the level be- 

 low the rims of the depres- 

 sion, so that they may not 

 be required to make the 

 long and circuitous climb to 

 and from the larger bridge's 

 approaches. 



large one, and, in fact, its approach at 

 one end passed through two of the piers 

 of the larger structure. 



The large bridge, completed about two 

 years ago, was constructed at the com- 

 bined expense of the city of Pasadena 

 and the county of Los An- 

 geles. It has a total length 

 of one thousand, four hun- 

 dred and seventy feet, and 

 is composed of nine spans 

 and six girder spans, be- 

 sides the usual abutments. 

 From the lowest point in 

 the channel bed to the road- 

 way level it is one hundred 

 and sixty feet in height, and 

 the roadway that traverses 

 it is twenty-eight feet wide, 

 with a five-foot sidewalk on 

 either side. Extending across 

 what is known as the Ar- 

 royo Seco, from rim to rim, 

 it spans not only a small 

 mountain stream, but also a lowland of 

 considerable extent, embracing many 

 acres of orange groves and a number of 

 fine homes. It is a feature of a much- 

 traveled automobile road that connects 

 Pasadena with the city of Los Angeles, 

 and is of rather ornate design. 



The small bridge, finished only recent- 



A Vast Tank with a Park on Top 



A TWENTY-FIVE MILLION gal- 

 lon concrete tank which will be 

 liidden from view by being parked over, 

 probably the largest of its kind in the 

 world, has been constructed in Cleveland 



The top of this one hundred and fifty million gallon tank 

 will be a fifteen-acre park 



as a part of the new filtration plant. 



The plant will have a capacity of one 

 hundred and fifty million gallons a day. 

 It covers fifteen acres. 



When completed the tank will be cov- 

 ered with earth and become a part of 

 the city park on which the plant is being 

 erected. 



