table; f-7 



ESTIMATED FIRST COSTS - Maximum Amount 

 (1956 Price Level) 

 LOWER BAY BARRIERS - NARRAGANSETT BATi 



Item Quantity 



EAST BARRIER 



Access Roads 

 Rock Fill 

 Rock Fill 



U,89li,000 

 3,92U,000 



Unit 



job 



Cu.Yd. 

 Cu.Yd. 



Contingencies 

 Engineering and Design 

 Supervision and Administration: 

 Construction Cost 



WEST BARRIER 



Access Roads 1 job 



Rock Fill 1,106,000 Cu.Yd. 



Land Wall 91,000 Cu.Yd. 



Culvert 1 job 



Navigation Gates 1 job 



Sluice Gates 1 job 



Contingencies 

 Engineering and Design 

 Supervision and Administration 

 Construction Cost 



TIVERTON BARRIER 



Construction Cost (From Table F-5) 



Total Construction Cost 



Total Lands and Damages (From Table F-5) 



TOTAL FIRST COST - LOWER BAY BARRIERS 

 (McLximum Amount) 



Estimated First Cost to U. S. 



Estimated First Cost to Local Interests 



Unit 

 Price 



L.S. 



f6.00 



5.00 



L.S. 

 L.S. 

 L.S. 



L.S. 

 6.00 



U.oo 



L.S. 

 L.S. 

 L.S. 



L.S. 

 L.S. 

 L.S. 



Amount 



$ 50,000 



29,36]j,000 



19,620,000 



Ii9>03JU,000 



7,356,000 



3,280,000 



3,090,000 



$ 20,000 



6,636,000 



36Ij,00Q' 



28,000 



ll4.,000,00G 



9,200,000 



3072lIB,000 



li, 537,000 



3,175,000 



2,770,000 



Total 



ft 62,760,000 



$ UO, 730, 000 



5,Uoo,ooo 



$108,890,000 

 110,000 



$109,000,000 



$105,203,000 

 3,797,000(1) 



(1) Including local cash contribution of $3,687,000 representing the 

 estimated present worth of a future annual cost of $130,000 to 

 the U. S. for operation and maintenance of the project, and an 

 estimated cost of $110,000 for lands, rights-of-way, relocations j 

 and damages to be borne by local interests. 



F-22 



