0000009015-99-000099 SC 13G/A 1 19990210 CALMAT CO 0000023533 1400 950645790 DE 1231 SC 13G/A 34 005-13647 99528775 3200 SAN FERNANDO RD LOS ANGELES CA 90065 2132582777 CONROCK CO 19840712 CONSOLIDATED ROCK PRODUCTS CO 19720915 BABSON DAVID L & CO INC 0000009015 004105478 MA 1231 SC 13G/A ONE MEMORIAL DRIVE CAMBRIDGE MA 02142-1300 6177237540 SC 13G/A 1 000000901599000099-001-seq1-sc-13g-a.txt 13G AMENDMENT