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IMPROVEMENT OF SAN LUIS OBISPO HARBOR, CAL.

At the beginning of the fiscal year the San Francisco Bridge Co., which has the contract for the completion of the breakwater, was engaged in closing the channel at the entrance to Morro Bay on the north side of Morro Rock quarry in order to scour the south channel to sufficient depth to permit of lighters reaching the quarry. A trestle was built across the north channel 1,571 feet in length, from which 10,825 cubic yards of broken stone was dumped into the channel. This work was completed August 7, 1910. Beginning at a point about 265 feet from Morro Rock, a 200-foot channel with no stone above 8 feet below mean lower low water was left in the barrier. This opening, however, has partially filled with sand. The south channel, which had become almost entirely closed, has gradually deepened until there is at present a depth of 15 to 20 feet at mean lower low water along the front of the quarry, and 11 feet on the bar at the entrance.

The delivery of stone in the breakwater was resumed August 23, 1910, and up to November 30 of the same year 9,880 tons had been delivered. Work was then suspended during the winter months. Delivery of stone was resumed on May 11, 1911, and up to the close of the fiscal year 6,957 tons had been delivered in the breakwater, a total of 16,837 tons for the fiscal year. This stone has been placed in the breakwater from station 11+50 to station 17+20. The breakwater is in the following condition: The portion between Point San Luis and Whaler Island and from station 0 (easterly end of Whaler Island) to station 6+70 is completed to full height. From station 6+70 to station 11 +80 it is built to a height of from 3 to 5 feet above mean lower low water. Some stone has been placed as far out as station 17+50, which is within 50 feet of the project end of the break

water.

Estimate of additional funds required.

Amount that can be profitably expended in fiscal year ending June 30, 1913, for works of improvement.....

1 Exclusive of the balance unexpended July 1, 1911.

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APPROPRIATIONS.

Total prior to Dec. 31, 1902 (see H. Doc. No. 421, 57th Cong., 2d sess.).. $280, 000. 00

Mar. 3, 1905..

Mar. 2, 1907.

May 27, 1908.

Mar. 4, 1909.

Mar. 4, 1911..

Total...

Receipts from sales..

Aggregate.......

25,000. 00 63, 660. 00 60, 000. 00

30,000. 00

64, 000. 00

522, 660.00

.95

552, 660.95

CONTRACT IN FORCE.

Name of contractor: San Francisco Bridge Co., San Francisco, Cal.

Amount and character of work: Breakwater construction, about $237,294.
Price per unit: $1.57 per short ton of stone delivered and placed in the work.
Date of approval: August 15, 1907.

Date of beginning work: May 1, 1908.

Date of expiration: July 20, 1911; waived for a reasonable period.

COMMERCIAL STATISTICS.

[Furnished by the Pacific Coast Ry. Co.

Season of navigation.-Year 1910: Open entire year.

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R.E.Pierce Fes.

Whaler Island
245Ft. long

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OCEAN

2380 Ft projected end of breakwater

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Plane of reference is mean of lower low waters. The mean rise of the greater high water is 5 feet

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