San Francisco : Architect and Engineer, Inc · leaf 419
or re.ser\oir ends will .serve to es-tablish and maintain the ponds and thoseon the outer ends to drain them and pre-vent re-flooding. It is necessary, how-ever, to raise the gates that are not inuse and support them in some way sothat they will remain open. A simple de-vice for this purpose… … DOIJJ5LE IN0TALL/¥10M CT mtMAlICDEAINAQE G^^ ffl1H CORlGATfiD PIPF.^
Architecture · Building
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