Subdivision Road Construction Inspection - Sanpete County
Construction of subdivision roads in Sanpete County is governed by the County's Roadway Design and Construction Manual, which anticipates that road work will be constructed in accordance with approved plans and verified through inspection.
In current practice, subdivision~ roads are often constructed without formal inspection during construction, with compliance instead confirmed through a final certification.
To support quality construction and reduce risk to landowners, developers, and future maintenance responsibilities, the following inspection approach is recommended.
Recommended Inspection Stages
Subdivision road construction should be observed at key stages, including:
1. Pre-Construction Review
Inspection is performed based on the plans and information provided at the time of review.
2. Subgrade Preparation
3. Road Base Placement
4. Drainage Installation
5. Final Grading
6. Final Inspection
Drainage Considerations (Critical)
Proper drainage is one of the most important
factors in the long-term performance of subdivision roads.
In many cases, roads constructed without
defined drainage features-such as roadside ditches or culverts-experience premature deterioration due to
water saturation, erosion, and freeze-thaw cycles.
Key drainage elements to consider include:
Where drainage is not properly addressed, road performance may be significantly reduced
regardless of the quality of surface materials used.
In practice, lack of defined drainage is one of
the most common causes of early roadway deterioration in rural subdivision roads.
Inspection Coordination
Inspection should occur during construction and requires
coordination with the contractor. Work should not proceed past critical stages (such as subgrade or base
placement) until those elements have been reviewed.
Advance notice is typically required to
coordinate inspection visits.
Where certification of road construction is required, the level of certification is
dependent on the extent of observation during construction.
Certification may be based on:
Greater confidence in compliance is achieved when inspections occur throughout the construction process.
Where inspection during construction is limited or does not occur at all stages,
verification of roadway construction may require additional evaluation after completion.
This may
include:
Where construction has not been observed, testing may be necessary to provide a reasonable
basis for evaluation.
At the discretion of the inspector, testing may be required to be performed by
a qualified geotechnical engineer or testing laboratory. All costs associated with such testing shall be the
responsibility of the client.
Post-construction testing can provide additional information regarding
compliance with typical roadway standards; however, such testing is limited in its ability to fully verify
conditions that were not observed during construction, including subgrade preparation and placement
methods.
Where testing is performed, results will be incorporated into any certification or reporting
provided.
Common Deficiencies Observed
Based on field experience, common issues in subdivision road construction include:
These issues can significantly reduce the service life of a roadway if not addressed during construction.
Purpose
This approach is intended to:
Disclaimer
Inspection services are limited to observation of visible construction
activities at the time of site visits and do not constitute continuous supervision unless specifically
agreed in writing.
Inspection and certification are based on conditions observed at the time of
inspection.