Civil Site Improvements: 51 Issues Found

The project

A civil site improvement project including grading, drainage, and utility work. InspectMind performed a comprehensive civil plan review, identifying drainage conflicts, utility coordination errors, traffic concerns, and specification inconsistencies before construction.

Project type

Civil · Infrastructure · United States

Codes referenced: International Building Code · NFPA 70 (NEC) · ADA Standards

Critical findings (8)

1. Engineer stamp for Charles Wilbur Lockman shows conflicting expiration dates (03/31/16 vs 03/31/18)

   Civil

   Critical

   Two seals for the same engineer and license number show different expiration dates, which is an internal inconsistency in the signed/sealed documentation.

2. Ambiguity between 'BEGIN CONSTRUCTION' at STA 664+87.50 and revision station limits (642+19.50 to 664+87.50)

   Civil

   Critical

   Both the Plan and Profile indicate “BEGIN CONSTRUCTION” at Station 664+87.50 (remove plug and join). But the Revision Description defines the construction limits as “CONSTRUCT SEWER FROM 642+19.50 TO STA 664+87.50,” which makes 664+87.50 the ‘TO’ (limit/end) station in that statement. This creates ambiguity about which end is intended to be the start of construction and the intended direction of work.

3. Unresolved design verification questions on construction documents

   Civil

   Critical

   The drawing contains internal review questions and unresolved design directives explicitly asking for verification of safety requirements and structural details. These are questions for the design team, not instructions for construction.

4. Sheet shows expired engineer seal (Exp. 03/31/16) while revision block is dated 6/24/25 under a different engineer/seal

   Civil

   Critical

   The plan sheet includes an engineer seal for Charles Wilbur Lockman (No. 42485) that reads “Exp. 03/31/16,” while the revision certification block is dated “6/24/25” and is signed/sealed by Puneet Comar, P.E. (R.C.E. 73065). This indicates conflicting/obsolete certification information remaining on the sheet.

5. Sheet simultaneously states no 8" RW to be installed, yet includes 8" RW installation notes and profile quantities

   Civil

   Critical

   This sheet includes an explicit statement that “NO 8\" IS TO BE INSTALLED”, but the same sheet also includes Construction Note 12 directing installation of an 8\" recycled water main and profile callouts for installing specific lengths of 8\" C900 purple PVC. These directives directly conflict within the page.

Sample high priority findings (24 total)

1. Duplicate sheet number M-442 used for two different sheets

   Civil

   High

   Two different sheets in the drawing set both use sheet number 'M-442'. Page 2 is titled 'DOMESTIC WATER IMPROVEMENT PLANS HAVEN AVENUE SHEET INDEX MAP & APPURTENANCES LOCATIONS'. Page 4 is titled 'DOMESTIC WATER IMPROVEMENT PLAN & PROFILE'. Both sheets have the identical sheet number M-442 in their title blocks.

2. City standard drawing 4104 is referenced for two different assemblies (air release vs temp blowoff)

   Civil

   High

   Domestic water construction notes call City of Ontario Std No. 4104 for an air release/vacuum relief valve assembly, but also call the same standard (4104) for installing a temporary blowoff.

3. Conflicting information regarding Future Street / Jade Dr location

   Civil

   High

   At the depicted intersection, the plan labels the roadway as "FUTURE STREET" and provides centerline intersection data: "CL INT. HAVEN AVENUE=218+14.34" and "CL INT. FUTURE STREET=10+00.00." However, a nearby note states: "THIS IS NOT A FUTURE STREET LOCATION. SEE NEW JADE DR LOCATION ON DRAWING," creating a direct conflict in the drawing annotations.

4. Ambiguous/contradictory instructions for Fire Hydrant service abandonment vs. markup stating hydrant never installed

   Civil

   High

   Construction Note 32 instructs: “ABANDON EXISTING FIRE HYDRANT SERVICE BACK TO MAIN” and to “INSTALL NEW FIRE HYDRANT AT ULTIMATE CURB LOCATION.” However, a plan markup note at the hydrant location states: “NOT REMOVING. HYDRANT WAS NEVER INSTALLED.”

5. Pavement section dimensions conflict between General Notes and Construction Notes

   Civil

   High

   General Note #2 specifies pavement section as 6"AC/8"CAB while Construction Note 1 specifies 8"AC over 10" CAB minimum. This is a 2-inch difference in asphalt concrete depth (6" vs 8") and a 2-inch difference in crushed aggregate base depth (8" vs 10").

6. Unresolved 'Sheet X' placeholder reference in Construction Note 4 (Sheets 4–6)

   Civil

   High

   Construction Note 4 on Sheets 4, 5, and 6 includes an unresolved placeholder reference: "PER DETAILS ON SHEET X." This is incomplete and does not direct the contractor/plan checker to an actual sheet/detail location.

7. Invalid Profile Linework Marked for Removal

   Civil

   High

   A prominent note on the Sheet 6 profile states that a section of the profile lines is "inadvertently shown" and "to be removed." The drawing currently displays incorrect vertical geometry.

8. Ambiguous/Conflicting Pavement Marking Material Requirements (Paint vs Thermoplastic)

   Civil

   High

   Construction Notes include both thermoplastic and paint marking items without clearly stating the conditions under which each material applies. Specifically, CN 5 specifies “PAINT 6” WHITE EDGELINE…” (1,477 LF) and CN 13 specifies “PAINT 12” SOLID WHITE STRIPE AT 30°.” (138 LF), while CN 1–4 and CN 6–7 specify “INSTALL THERMOPLASTIC …” for other striping/marking work. In the General Notes, Note 9 requires reflective thermo-plastic for renewal/replacement of existing traffic striping/markings impacted by the contractor’s operations, while General Note 22 requires contrast striping in paint on PCC pavement. These statements create ambiguity about whether CN 5 and CN 13 are intended as paint (e.g., PCC contrast striping) or should be thermoplastic to align with thermoplastic-based striping elsewhere and/or renewal requirements.

9. Contradictory Project Scope Limits for Riverside Drive

   Civil

   High

   The Sheet Index explicitly defines the scope for Sheet 4 as extending 490 feet east of Haven Avenue. However, prominent notes on the Title Sheet and Vicinity Map state that the scope on Riverside is reduced to be within the intersection only. 490 feet extends significantly beyond typical intersection limits, creating a direct conflict in the project boundaries.

10. Invalid matchlines and references to renumbered/obsolete sheets

    Civil

    High

    The Revision Description states that sheets 14-17 were renumbered to 1-7. However, the drawing matchlines and cross-references still point to the old sheet numbers (Sheet 16, Sheet 14), which presumably no longer exist in the current set structure.

Issue categories

Civil

Civil issues found during plan review

Plumbing

Plumbing issues found during plan review

Mechanical

Mechanical issues found during plan review

Value delivered

• 51 issues surfaced before construction
• 8 critical civil and utility conflicts identified
• Drainage and utility coordination errors caught
• Traffic concerns and specification issues flagged