provide an impact with a velocity of 7 feet per second, or about 5 miles per hour. The
trajectory angle between the log and the levee will be about 75 degrees. Twelve in. and
17 in. diameter logs, each 12 feet long, will be used. The smaller log will be used first,
followed by the bigger one. The movement and damage to the IFFS, if any, from the
smaller log impact test will be observed before continuing to the larger log impact test. If
the IFFS is leaking profusely or has experienced more than 6" permanent movement after
the smaller impact log test, the bigger impact log test may not be performed. ERDC
personnel will determine if it is safe to continue with the next impact log tests.
11.0 Repairs to Innovative Flood-Fight Structures
Up to a total of three minor repairs to a candidate's IFFS structure will be allowed during
the three major tests (hydrostatic, hydrodynamic, and overtopping). This does not mean
three repairs during each test. A minor repair is hereby defined as "a repair requiring a
maximum of 30 minutes using a maximum of four men, using only materials available on
site". There will be seven opportunities to make repairs, and the vendor can only make
three repair attempts. The vendor must understand the STP completely before deciding
the condition under which these three minor repairs will take place. The testing will not
be halted during a particular test phase to make a repair. The repairs must all be made
after the test or tests at one level is/are complete; this becomes more important during the
dynamic testing, which is discussed below. The three types of repairs are described as
follows:
11.1 Static Test/Repair Description:
During a static test, the water elevation will be raised to three different levels: 33.3% x h,
66.7% x h and 95% x h , and each level is maintained for a minimum of 22 hours while
seepage, displacement, and material loss are recorded (Attachment 2). If the need for a
minor repair develops at 33.3% x h or the 66.7 x h, the vendor may choose whether or not
to perform the minor repairs before the tests proceed to the next level. If the vendor
wants to make a repair after the 95% x h depth, safety dictates that they must wait until
the water level is dropped to the 66.7% x h level and prior to the dynamic test to make
this repair.
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