Graph - c. 1939 - 1940 - Dam (Probably Prado Dam) Constructions Levels

This graph was drawn by William Saunders, CE (Civil Engineer) in Pomona, California.  It shows dam construction levels.  While this graph is undated and the dam is not mentioned, it is most likely the Prado Dam built by the Army Corps of Engineers following the heavy rain in Corona in 1938. -  MEASUREMENTS:  22" X 37" - CONDITION:  Very poor.  The paper is extremely brittle and has torn and separated in numerous places. The graph and the drawing colors have little fading and are very readable.  COPIES:  1.
Abstract/Description: This graph was drawn by William Saunders, CE (Civil Engineer) in Pomona, California. It shows dam construction levels. While this graph is undated and the dam is not mentioned, it is most likely the Prado Dam built by the Army Corps of Engineers following the heavy rain in Corona in 1938. - MEASUREMENTS: 22" X 37" - CONDITION: Very poor. The paper is extremely brittle and has torn and separated in numerous places. The graph and the drawing colors have little fading and are very readable. COPIES: 1.