Ingenieursdienste “kou klippe” om rioolstelsel op te gradeer

Die Ingenieursdienste-afdeling moes met tye diep slote in klipgrond grawe en deur rotsbanke gaan om Orania se rioolstelsel op te gradeer. Die hoof van Ingenieursdienste, André van Heerden verduidelik dat hulle met geleentheid `n spesiale bak vir hulle grawemasjien laat maak het wat smaller sodat hy baie krag op die punt kon sit. As dié masjien nie gewerk het nie is `n hidroliese breker ingespan en as dit steeds nie suksesvol was nie moes die manne met `n lugdrukboor gate in die rotse boor en chemikalieë ingooi wat die rots afgebreek het. “As jy `n sekere diepte moet haal, moet jy hom haal,”verduidelik André.

Dit is nie aldag maklik nie en verg soms haarfyn beplanning. Met die aanlê van die rioolstelsel moes die span met geleentheid deur `n hoogte gaan om `n pompstasie uit te sny en met ander kere weer baie diep soos toe daar om die vullisterrein gegrawe is.

Hulle het besluit om van die bestaande rioolstelsel oor te gaan na oksidasiedamme omdat die nuwe stelsel lae onderhoud verg en nie elektrisiteit benodig nie. Die klimaat in die Bo-Karoo maak dit ook moontlik om van oksidasiedamme gebruik te maak waar die hitte vir verdamping sorg en die son se UV-strale bakterieë doodbrand.

“Soos wat die water deur die stelsel beweeg word dit al hoe skoner en hoop ons om eendag, as genoeg vloei is, die water by die laaste dam weer vir besproeiing te gebruik,” vertel André. Die oksidasiedamme sal in drie fases gebou word wat uiteindelik genoeg sal wees om 10 000 mense se riool te hanteer. Die eerste fase sal genoeg wees vir 3 000 mense.

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