[Twin Falls, Id. June, 1910]. 7pp. of mimeographed text, ten folding blueprint charts, Index leaf, and four leaves displaying sixteen original photographs keyed to the Index, plus a single sheet of weir calculations laid in. Original plain wrappers, front wrapper lacking, rear wrapper and one blueprint detached. Minor edge wear, some chipping and closed edge tears to outer leaves. Good plus. Item #3446
An informative and likely unique report compiled by C.E. Carter, an engineer with the Twin Falls North Side Land & Water Company. The body of the report consists of seven pages of text and ten folding blueprints containing sketch plans and tables of data pertaining to the tests and discharge of three separate depth tests for measuring suppressed weirs (used to divert water flow within rivers). The sixteen photographs at the rear of the work show the dam in which the testing took place, the regulating weir, in-process testing, areas of leakage, the five-foot weir running at full capacity, and other aspects of the tests. OCLC records a handful of entries for works relating to the Twin Falls North Side Land & Water Company, but not the present report; considering it was compiled with text, blueprint plans and tables, and original photographs, it is likely unique or at least the only surviving example of the report.