Forestry & timber circleCongo - Brazzaville2026-09-28

Three km of forest road: drainage first or gravel first?

G

Grace W.

Verified member · Project chief engineer

Three kilometres of new forest road, 5 m wide, USD 80,000 budget.

It must open before the rains, and only one item can be done first.

Side drains or gravel first: which drives later maintenance cost more?

Discussion (3)

  • Paulo M.Verified member · Project chief engineer2026-09-29

    Drainage first: without side drains and culverts, the gravel layer is destroyed by pumping within a season.

  • Kwame A.Verified member · Mine equipment manager2026-09-30

    We build slope and drains first, then grade the surface and add more next year; costs stay controlled.

  • Nnamdi E.Verified member · Service engineer2026-10-01

    Size culverts by catchment area; one blocked crossing washes out the whole section. That detail matters most.

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