F-7. AMUAL CHARGES 



The estimate for annual charges is based on interest on the 

 total investment, amortization, allowance for loss of taxes, 

 operation and maintenance. The Federal and non-Federal invest- 

 ments include the first cost plus 2.5 percent interest during 

 construction. The Federal annual charges include interest on 

 the investment at 2,5 percent and amortization over a period 

 of 50 years. The non-Federal annual charges include interest 

 on investment at 2.^ percent, amortization over a period of 

 So years, tax losses, maintenance and operation. 



FOX POINT BARRIER 



F-8. DESCRIPTION ATO PERTBIENT DATA 



a. General . The Fox Point barrier would consist of a dam 

 with gated openings and a pumping station. The 1,100-foot 

 barrier would cross the Providence River from Henderson Street 

 on the west bank to Fox Point on the east bank, and would tie 

 into a concrete land-vjall system, 3,Oi40 feet in length, connect- 

 ing the barrier to high ground at each end. For plans and 

 details see Plates 3 and h of the report. 



b. Barrier . The barrier would be a concrete gravity 

 section UO feet in width, with a deck elevation 12,5 feet above 

 mean sea level, and a reinforced concrete wall 10 feet in height, 

 extending the full length of the barrier on the upstream side. 

 The gravity section would be founded on a concrete base 50 feet 

 in width supported by steel "H" piles driven to refusal in the 

 glacial till. 



c. Sluice gate structure . This structiire would be founded 

 on a concrete base supported by steel "H" piles and would contain 

 four openings 20 feet wide by 2k feet high. Closure wo\ild be 

 effected by foixr gates hinged at the top. 



d. Cooling water intake structure . This structure would 

 fumi¥h cooling water to the existing generating plants of the 

 Narragansett Electric Company. The cooling water intake would 

 consist of a ^ated inlet 20 feet wide and 32 feet high and a 

 channel 50 feet wide and 2,700 feet long. An emergency opening 

 adjacent to the barrier consisting of three manually operated gates 

 would permit the entry of cooling water during a hurricane when the 

 sluice gates would be closed. 



F-3 



