Start with the failure symptom
Note whether a private grate or basin overflows, an outdoor pipe drains slowly, a French drain stays saturated, an outlet has weak flow, a low area holds water longer than it used to, or runoff has changed after landscaping, irrigation, paver, roof, or downspout work.
Trace the complete water path
A repair review should follow the source, collection point, buried pipe or trench, cleanouts, transitions, and outlet as one connected route. Repairing one visible component may not solve repeat pooling when the blockage, settlement, damage, or discharge limit is elsewhere.
Separate cleaning from repair
Leaves, mulch, sediment, roots, and accessible debris may point to cleaning. A separated fitting, crushed pipe, settled trench, damaged basin, failed fabric or stone assembly, missing access point, poor transition, or unworkable route can require repair, rerouting, or replacement.
Check inlets and collection points
Covered grates, cracked basins, loose channel sections, failed downspout adapters, eroded entry points, and buried or undersized collection areas can keep runoff from entering the system. Record every visible inlet and what happens there during rain.
Locate the buried route and access
Share any installation records, cleanout locations, pipe ends, surface settlement, root zones, irrigation, utilities, fences, gates, pavers, concrete, pool equipment, and prior excavation. The proposed access and excavation limits should be clear before work starts.
Confirm the outlet and boundary
A private drainage repair still needs a workable and authorized discharge point. Do not assume a swale, culvert, canal, street, right-of-way, neighboring lot, public catch basin, or unidentified pipe can receive the repaired route without the applicable ownership, City, utility, survey, permit, or professional review.
Compare the written repair scope
Ask the proposal to identify the observed failure, cleaning or diagnostic work, components repaired or replaced, route and outlet work, excavation, utility process, access, debris handling, restoration, exclusions, schedule, change process, and maintenance instructions.
Plan restoration and future maintenance
The written scope should address backfill, finish grading, sod, landscape beds, irrigation, pavers, concrete, cleanup, and access for future inspection or cleaning. A repair is easier to maintain when the inlet, cleanout, and outlet remain identifiable and reachable.