UFC 4-150-07
19 June 2001
Table 5-3. Daily Rates for Underwater Inspection Tasks*
Bulkhead in Linear Meters
Inspection Task
Pile/Day
Day
Swim by
300 to 600
150 to 450
Cleaning
30 to 70 at 3 to 15% of each
150 to 450 at 15 to 90meter
pile
(16 to 98 yard) intervals
Measurements
50 to 200 for wood at 5 to
150 to 450 at 15 to 90meter
15% of each pile
(16 to 98 yard) intervals
30 to 60 for steel at 3 to 10%
of each pile
30 to 70 for concrete at 3 to
15% of each pile
*Rates vary widely depending on the effects of many factors, such as: water
visibility, facility size and age, marine growth, and construction.
5-3.1
Inspection Frequency. The frequency of routine or periodic
inspections will depend on whether the inspection is on the surface or
underwater, and the expected rate of deterioration and damage. An example of
an area requiring more inspections is ships berthing, which deteriorates both
fender and bearing piling. The frequency and level of inspection should,
therefore, be closely tied to the historical deterioration rate of the facility.
Statistical software has been developed that identifies inspection frequencies
based on cost when known or estimated structural data. The frequencies
obtained will be unique to the activity's situation (from NCEL CR 87-005,
Inspection Frequency Criteria Models for Timber, Steel, and Concrete Pile
Supported Waterfront Structures, December 1986.) As a general guide,
recommended frequencies of inspection for the different types of waterfront
structures are:
5-6
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