On a coal spoil rebuild last spring, a GPS-guided D6 and a drone with multispectral mapping let us hit geomorphic grades and seed within 48 hours, but the real bottleneck was water — our containerized DAF unit kept discharge under 25 NTU while we dewatered. What tools or setups have helped you close the loop faster between active mining, pit backfill, and water treatment?
We shaved the lag by adding a skid lamella clarifier upstream of the container DAF and reusing the effluent for hydroseeding via a 4k-gal nurse tank; with 0.5–1 ppm anionic poly we held <15 NTU at about 400 gpm and seeded same day. Compared to your “kept discharge under 25 NTU,” the lamella gave us headroom and kept the trucks from playing musical chairs. Have you tried a temporary 2–3" header along the haul road so the dozer/seed crew can pull at the toe while you dewater?
One tweak that saved us days was renting a 20k-gal frac tank as an EQ buffer ahead of the container DAF; with a VFD transfer pump and an inline turbidity probe tied to a peristaltic coagulant pump, the DAF saw steady flow and we stayed under ‘25 NTU’ even through dewatering surges. It’s cheap insurance for flow swings and kept the D6 and drone schedule tight on our side. Are you dosing open-loop now or running any inline turbidity feedback?
We sped things up by staging Geotube bags on a lined pad and pumping pit slurry in with a mag‑metered, flow‑paced polymer injector; the filtrate fed the hydroseeder and we were seeding inside 36 hours — just watch cold snaps, they slow drainage. If it helps, this is what we used: Home - Geosynthetics for civil + environmental infrastructure | Solmax; want the dose/flow numbers we settled on?