Section 3: Documentation Review Stages
Anchor: #i1007134Review Data
Hydrologic and hydraulic data and documentation should accompany all drainage structure proposals that are submitted for preliminary review and approval prior to the actual detailed design of the structure. The documentation expected for review is usually a summary of the pertinent data. Permanent documentation should be much more extensive and should include considerations, criteria, judgments, background data, computations, and details.
Submitting data and documentation for preliminary review does not relieve submission requirements for final review of the PS&E package.
The final review involves presenting data and documentation in the plans submitted for PS&E processing.
Documents supporting field change requests must describe and justify the effects of the proposed change on the expected hydraulic performance of the facility. Generally, this involves modifying existing documentation to include the following: a description of the specific hydraulic effects resulting from the proposed facility change, revised plan sheets and hydraulic data sheets, the hydraulic data sheets from PS&E submission for some projects, and a note on the plans clearly explaining the changes made to the original design.
Anchor: #i1007159Permanent Documentation Retention
Permanent documentation includes the construction plans and design files maintained in the district. Usually, PS&E reviews require only the construction plans. However, if the project did not receive preliminary review or there are other concerns, it may also be necessary to submit the design file for review.
Retain hydrologic and hydraulic documentation in the project plans or another permanent location at least until a new drainage study requires the replacement or modification of the facility.
Prepare and maintain permanent files with as-built plans for every drainage structure to document subsurface foundation elements such as the following:
- footing types and elevations
- pile types
- finished top elevations
Other information that should be included may become evident as the design or investigation develops. Include this information at your discretion.