div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader030fdocumentsnetreader030viewer20220308165b2770367f8b9a771c8b6a57html5page1jpg target=_blank img data-url=documentexcavation-guidance-northern-gas-networks-title-excavation-guidancepdf-authorhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: Excavation Guidance - Northern Gas Networks · Title: Excavation Guidancepdf Author: NGN Subject: Guide to Excavation Keywords: Trenchs HSG47 Underground Services minimum depth Created loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader030fdocumentsnetreader030viewer20220308165b2770367f8b9a771c8b6a57html5thumbnails1jpg width=140 height=200 adivdiv class=annotationa href=http:wwwhsegovukpubnspricedhsg47pdf rel=ugc nofollow target=_blankhttp:wwwhsegovukpubnspricedhsg47pdfadiv div class=annotationa href=http:wwwhsegovukpubnspricedhsg47pdf rel=ugc nofollow target=_blankhttp:wwwhsegovukpubnspricedhsg47pdfadivdiv