The largest of the new channels dug was the Lower Mexican Heading , located about 4 miles south of the US / Mexican border. It was dug to bypass the upper 4 mile section of the Imperial / Alamo Canal north of the heading that had been rendered unusable from silt deposits. After completion, a sufficient water supply for the the Imperial Valley was restored, but as with the other bypass channels, it too lacked a headgate to control the flow of water.
There were plans to install a headgate, but building one at this location required the consent of the Mexican government and unfortunately it was not approved until the following year.
Map Depicting Location of The Lower Mexican Heading
Note; The Lower Mexican Heading was also referred to as Intake # 3.