TABLE F-1 

 DESIGN CRITSilA AND SELECTED TOP ELEVATIONS 



Fox Point Lower Bay 



BASIS OF COST ESTIMATES 



F-a. COST ESTIMATES 



The costs of the barriers have been estimated on the basis of 

 designs which will provide economical and safe structures, Bnbank- 

 ment quantities include allowances for settlement. An allowance 

 for eight feet of settlement was made in the embankment quanti- 

 ties for the West barrier. In the East harrier, for an assumption 

 of favorable fotmdation conditions, a settlement of 20 feet was 

 used. A settlement of 50 feet was used in the assumption for un- 

 favorable foundation conditions. 



F-5. UNIT PRICES 



Unit prices are based on the most nearly comparable large 

 marine projects in this section of the country, with adjustments 

 for the size and nature of the project, availability of materials, 

 and adjustment to 1956 price levels. Rock prices for the East and 

 West barriers reflect the costs of equipment, such as bottom-dump 

 barges, written off in the first 6,000,000 cubic yards, 



F-6, CONTINGENCIES, ENGINEHIING, AND OVERHEAD 



The estimates include allowances for contingencies, engineering, 

 design, supervision and administration. These allowances are based upon 

 experience, evaluation of the site and the project, and ccmjparison 

 with other projects of the nearest comparable magnitude and character- 

 istics. 



F-2 



