www.valenza-engineering.com 7 OGNZ - WUG Conceptual Engineered Mitigation of Impact on Surface Water Systems DRAFT Grouting strategy by inflow zone Z o n e d e p e n d e n t o n a n t i c i p a t e d i n f l o w s t o t u n n e l a n d m i n e ( c o n c e p t u a l i s e d – r e f i n e d i n P h a s e 2 a f t e r NM ) . ❑ Z o n e 1 L o w i n f l o w ( s e e p a g e ) Q < 1 0 L / m i n 2 p r o b e h o l e s o R e m e d i a l g r o u t i n g n o t r e q u i r e d ❑ Z o n e 2 M o d e r a t e i n f l o w 1 0 < Q < 2 0 L / m i n 4 p r o b e h o l e s o R e m e d i a l g r o u t i n g m a y o r m a y n o t b e r e q u i r e d ❑ Z o n e 3 H i g h i n f l o w 2 0 < Q < 1 0 0 L / m i n 4 p r o b e h o l e s o R e m e d i a l g r o u t i n g r e q u i r e d ❑ Z o n e 3 B V e r y h i g h i n f l o w Q > 1 0 0 L / m i n 4 o r m o r e p r o b e h o l e s o S i g n i f i c a n t r e m e d i a l g r o u t i n g r e q u i r e d
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