CONTRACTS IN FORCE. Contract dated May 4, 1908, for dredging about 1,916,700 cubic yards of material from Oakland Harbor, Cal. Rate: 18.8 cents per cubic yard. Name of contractor: San Francisco Bridge Co. Date of commencement: May 23, 1908. Date of completion: July 20, 1910. Date of approval: May 29, 1908. Date of expiration: December 6, 1910. Contract dated November 15, 1910, for dredging about 1,289,200 cubic yards of material from Oakland Harbor, Cal. Rate: 11.4 cents per cubic yard. Name of contractor: San Francisco Bridge Co. Date of commencement: December 30, 1910. Date of completion: Work still in progress. Date of expiration: June 6, 1913. Contract dated December 15, 1910, for placing 3 drawbridges across the Oakland Harbor Tidal Canal in satisfactory condition for operation of their draws by electricity. Rate: $16,100. Name of contractor. Frederick C. Roberts & Co. Date of commencement: January 18, 1911. Date of completion: Work still in progress; not yet completed. Date of expiration: June 29, 1911. RR 4. IMPROVEMENT OF SAN PABLO BAY, CAL. The only work done during the year was a hydrographic survey to determine the extent of deterioration of the dredged channel through Pinole Shoal and its vicinity. The survey showed a total obliteration of this channel, but there is an available depth generally of about 2 feet more over this shoal than could be found prior to the dredging of the channel. An estimate of cost of restoring this channel to its original dimensions was given in the Report of the Chief of Engineers for 1910, page 2352. Congress having adopted the new project on February 27, 1911, for an enlarged channel, specifications were prepared for dredging this new channel by contract. Estimate of additional funds required. Amount that can be profitably expended in fiscal year ending June 30, 1913, for works of improvement.... 1 $200,000 COMMERCIAL STATISTICS. The commerce passing through San Pablo Bay includes all that coming to San Francisco from the Sacramento, San Joaquin, and Napa Rivers, and Petaluma Creek, which, being all carried on stern-wheel flat-bottom river steamers and barges, is not particularly benefited by the deep channel over the shoal. However, all the commerce of Karquines Straits and Port Costa, which is mostly carried on deep-sea ships, and all vessels going to and from Mare Island Navy Yard are benefited by the dredged channel. RR 5. IMPROVEMENT OF SUISUN CHANNEL, CAL. No work has yet been done on this channel, and no money has been spent. The necessary land for the rights of way for the proposed cut-offs on the slough and the harbor at Suisun has not been transferred to the United States, but it is expected that this will be accomplished in the near future and that construction work will soon be commenced. There has been no work of improvement at this locality, and consequently no deterioration of improvement. Estimate of additional funds required. Amount that can be profitably expended in fiscal year ending June 30, 1913, for works of improvement... 1 $12,500 June 25, 1910.. APPROPRIATIONS. COMMERCIAL STATISTICS. $12,500 Vessel classification. It has been impossible to obtain any exact data as to the classification of the vessels using this stream. |