Verify pile cap elevations, bulkhead grades, and dredge depths with tidal datum support and USACE Section 10/404 permit as-built documentation.
Marine construction elevation references are typically in MLLW or MLW, but instruments use NAVD88. Manual datum conversions introduce errors that can invalidate as-built documentation.
Section 10 and 404 permits require comprehensive as-built documentation showing all structures were built to permit specifications. Gaps in records can trigger compliance investigations.
Pile cap elevations at a marine structure must be verified before formwork is removed. Access is difficult, conditions are harsh, and there's no second chance once concrete is poured.
Set benchmark in NAVD88, MLLW, MLW, or any datum — Sitemark handles the datum reference for all shots on the job.
Log pile cap elevations with pass/fail vs design tolerance — organized by bent, pier, or pile ID.
Log top-of-wall elevations along the full bulkhead run — verify against design elevation and USACE permit requirements.
Log dredge depth shots vs design depth — document compliance with USACE Section 10 permit dredge limits.
Track each USACE permit condition with photo documentation and compliance notes — required for permit closeout.
Professional as-built documentation package suitable for USACE Section 10/404 permit compliance reporting.
Marine construction elevation references vary by permit type and region. USACE Section 10 permits typically reference Mean Lower Low Water (MLLW) for navigational clearances. Construction drawings may reference NAVD88. Sitemark allows you to set the datum for a job so all shots use a consistent reference — and the Tidal Datum Converter calculator helps convert between datums.
Log each pile cap elevation with the pile ID, design elevation, and tolerance. Sitemark calculates pass/fail automatically. For pile caps that are accessible only at low tide, log the measurement window (date, time, tidal stage) alongside the elevation — this is important for USACE documentation.
USACE as-built surveys for Section 10 structures typically require horizontal accuracy of ±0.1 ft and vertical accuracy of ±0.05 ft. For navigational clearance documentation, vertical accuracy of ±0.02 ft may be required. Robotic total stations from Trimble, Leica, and Topcon meet these requirements under typical marine survey conditions.
Yes. The depth-of-cover module works for dredge depth verification — log the seabed elevation before and after dredging at each station, compare to the permitted dredge depth, and generate a compliance report showing where dredging was within permit limits.
USACE Section 10/404 permits contain numbered conditions that must be documented for permit closeout. Sitemark's permit condition tracker lets you list each condition, attach photos, log compliance dates, and mark each condition as compliant or requiring action. The final permit compliance report shows each condition and its documentation.
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