Trace each storm drain run and structure from the drainage plan into its specified pipe material, bedding class, structure construction, and field-test scope, then confirm the tracer-wire and cover-depth coordination before treating the plan as settled.
Assemble the review package
Gather the storm drainage plan and profile, the pipe and structure schedule, the drainage structure details for manholes and inlets, the geotechnical bedding recommendations, the low-impact-development or detention layout where applicable, and the issued specification. Start with one drainage run rather than the whole site system.
WBDG publishes UFGS 33 40 00: Stormwater Utilities as a public guide-specification reference (accessed September 28, 2026). Use your project’s issued specification and amendments for the actual comparison; the guide specification does not automatically govern your project. The checklist below is an original suggested review workflow, not a reproduction of the UFGS requirements.
Eight checks to run against the issued set
Use one record per location or system. The CSV contains the same eight prompts plus fields for source revisions, observed evidence, the review owner, the decision, and closure references.
| Check | Sources to compare | Question to resolve |
|---|---|---|
| Pipe material selection | Pipe for Culverts and Storm Drains clause (concrete, clay, steel, aluminum, PVC, PE, PP, SRPE) + pipe schedule or plan callouts | Does the pipe material shown at each run match a material the specification actually carries, rather than a product the specification does not list? |
| Bedding by pipe type | Bedding and Initial Backfill clause (different classes by pipe material) + pipe material scheduled for that run | Does the bedding detail referenced on the drawings match the bedding class the specification requires for the pipe material actually scheduled? |
| Manhole and inlet construction | Manholes and Inlets clause (precast reinforced concrete, ladder spacing) + structure schedule and details | Do the structure types shown, such as manhole versus inlet and whether a ladder is included, match what the specification allows, with ladder rungs at the specified spacing? |
| Final backfill and construction traffic | Final Backfill clause (compaction by soil type, minimum cover before traffic) + grading and paving sequence | Does the construction-traffic routing shown on the drawings respect the minimum pipe cover the specification requires before equipment crosses a buried run? |
| Tracer wire and warning tape | Installation of Tracer Wire and Warning Tape clause (cross-referencing Section 31 00 00 Earthwork) + utility plan pipe material | Is tracer wire called out for non-metallic storm pipe consistent with both this section and the earthwork section it cross-references for burial depth? |
| Underground detention system coordination | Underground Stormwater Retention/Detention System clause (embedment, compaction) + site plan cover depth and surface loading | Does the drawing’s cover depth and surface loading over the detention system match the compaction and embedment method the specification assumes for that product? |
| Field test scope by pipe type | Leakage/Deflection Testing and Post-Installation Inspection clauses + pipe material scheduled | Are the field tests called out for a run appropriate to the pipe material actually scheduled, since deflection testing applies to flexible pipe and not rigid concrete pipe? |
| Low Impact Development verification | Low Impact Development Inspection clause (LID Verification Report, as-built comparison) + civil site plan LID features | Does the LID Verification Report’s design portion match the bioretention, permeable pavement, or other LID features actually shown on the approved site plan? |
Worked example: deflection testing specified for rigid pipe
Illustrative example: the storm drain schedule lists reinforced concrete pipe for a given run, but the field-testing note calls for deflection testing, which the specification’s own testing article limits to flexible pipe such as PVC or corrugated metal, not rigid concrete pipe.
Confirm the pipe material actually scheduled for the run, compare it against the field-test article’s scope, and correct the testing note or the schedule before the test is performed. Recheck the bedding class for the same run, since it is also assigned by pipe material.
Avoid a false conflict
A single storm drainage note covering an entire site plan does not confirm that every run received the bedding, structure type, and field test appropriate to its own pipe material; the specification assigns several of these requirements by material, not by plan sheet.
When requirements disagree, follow the project’s document-control and clarification process. Do not assume that drawings always override specifications, or the reverse. Identify the exact sources and request an authorized decision.
Close the issue across the affected documents
Record the location or tag, drawing and specification references, issue dates, observed difference, and the decision needed. Assign an owner and keep the item open until the response identifies the governing requirement. Check the revised drawings and specification references together; a response email alone may leave the issued package inconsistent.
For the overall process, use the guide to drawing and specification conflicts. Mark an inapplicable checklist row with a reason, and distinguish a verified correction from a question that still needs design information.
Where Groundbook fits
Groundbook’s drawing and specification review helps investigate potential disagreements in the documents you supply. Include the relevant specification sections and drawing references, then verify the cited evidence with the responsible reviewers before acting on a finding.