The City And the Allegheny River Bridges Recommendations for Bridge Heights And

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The City And the Allegheny River Bridges Recommendations for Bridge Heights And
T W Thomas William Symons
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[4. 732. L?0 I5. 740, 9?9 I95. 937. 3Z9 269, 597979 343. 258, 4>Z9 PERCENT OT- INCREASE OP CPrtCTlVE ENERGY REQUIRED 6TH. 5I BRIOGt 36. 6% ro*>. 3/ 172. 0% 9THST dRfDGE 29. 1% 777% 126. 2% At the Sixth street bridge there is at present an undesirably steep grade* on the Allegheny or Northside approach, but it is only 230 feet long and being paved with stone gives a good foot- hold for horses. This is to be greatly benefited by filling up the street with material taken from the "Hump" grading ;
...the plans on file in the City Bureau of Construction providing for an im- proved grade of only 2. 22 per cent. Many of the abutters have already waived their damages and there is no question that the improvement will be made.
The present bridge grades and those of the Pittsburgh ap- proach are less than 3 per cent. At the Seventh street bridge the grades do not exceed 3 per cent. , except on the Allegheny approach where the grade is now being improved so as to reduce it to 2 per cent. At Ninth street, while the present bridge grades *3.


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