| OCR Text |
Show digested by Hoyt ( ( Exliibit Ex-lilibit Exlilibit ) 87 86 , pages 15 , 16 ) , the , amount of silt carried past the Goodridge Bridge , in ( suspension susimtsiou ) during ( the flie ) period November , 1914 , to August , 1915 , amounted to 16,638,000 tons . It ( is- is ) estimated by Hoyt ( Exhibit 86 ) that the total amount of silt carried by the San Juan in ( suspen suspen- suspen ) sion and as bed load during the course of a year ( is- is ) between 16,000,000 and 100,000,000 cubic yards , and in ( all al"Ll alLl ) probability nearer the greater of the ( two t-wo two ) . estimates . ( Howard HowaTd ) ( Vol . 21 , page 3805 ) estimates that ( dur- dur ) ing the ( 12-month 12month ) period ending September 30 , 1929 , 60,200,000 tons of suspended matter passed ( the- the ) Goodridge bridge . Love ( Vol . 21 , page 3840 ) , based on actual measurement made to determine . silt content , estimates that between July 10 and ( Oc- Oc ) tober 1 , 1929 , alone 150,000,000 tons passed ( the- the ) gaging station in suspension , and that at times ( as- as ) much as 40 per cent by ( weight -weight weight ) of the water was sediment ( Vol . 21 , page 3825 ) . During one day , September 21 , 1921 , Love estimates that ( 20,000,000' 20,000,000 ) tons were carried by the San Juan River . ( Vol . - 21 , page 3826 . ) Silt , General ( -The The ) estimates by Howard and Love ( Vol . 21 ) being based on actual measurements . made by the TL S . Geological Survey for the ( pur- pur ) pose of determining the actual quantities of ( sedi- sedi ) ment , are as accurate as any that can be made . . |
