Site Preparation & Earthworks
NLS Contractors carries out site preparation and earthworks packages in Riyadh, Jeddah, Dammam, Khobar and across the Kingdom: clearing, cut and fill, excavation including hard strata, dewatering, imported select fill and compaction tested to modified Proctor ASTM D1557. Handover includes survey levels, compaction test results and as-built levels.
Earthworks set the levels, the bearing ground and the drainage for everything built after them, so the package starts from the geotechnical report and the topographic survey. Scope covers clearing and grubbing, topsoil strip, cut and fill to formation levels, bulk and trench excavation including hard strata, dewatering where the water table requires it, imported select fill and compaction in controlled layers.
Ground conditions change the method more than any other factor. On the Eastern Province and Red Sea coasts, sabkha and a high water table mean dewatering, removal of unsuitable material and often replacement fill. Around Madinah, basalt turns excavation into rock breaking and cuts the output per day. Riyadh is mostly limestone and sand, firmer and drier, but hard bands still appear and need a rock allowance. The offer states what it assumes for each, because those are the lines that move once the excavator starts.
Fill is tested, not assumed. Imported select fill is approved against the specification, modified Proctor (ASTM D1557) sets the maximum dry density for that material, and field density tests confirm the compaction achieved in each layer before the next one goes on. Levels are surveyed at formation, so the next trade starts from a signed-off surface.
Spoil handling is priced as its own item. Haul distance and the approved disposal location are the two inputs that move cost most after rock, and dewatering discharge needs a route that the authority or the owner allows. Where existing services cross the site, they are located and marked before excavation begins.
To price the package, send the geotechnical report, the topographic survey, the grading plan or formation levels, the BOQ cut and fill quantities, the site city and the programme. Price and lead time depend on the scope, and the offer states both. Handover documents are the survey levels, the compaction test results and the as-built levels.
Specifications
- ✓Scope: clearing, cut and fill, excavation including hard strata, dewatering, imported select fill and compaction
- ✓Compaction testing: modified Proctor ASTM D1557 with field density checks layer by layer
- ✓Design basis: the geotechnical report and the grading plan or formation levels
- ✓Ground conditions priced: sabkha and high groundwater on the Eastern and Red Sea coasts, basalt around Madinah
- ✓Pricing inputs: cut and fill quantities, rock allowance, dewatering duration, haul and disposal distance
- ✓Handover: survey levels, compaction test results, as-built levels
Frequently Asked Questions
What happens when excavation hits rock or basalt?+
The method changes from digging to breaking, and output per day drops. The offer states its rock assumption, so the quantity can be measured and agreed when it appears instead of argued afterwards.
When is dewatering needed on a Saudi site?+
When the excavation goes below the water table, which is common on sabkha along the Eastern Province and Red Sea coasts. The geotechnical report records the groundwater level, and the offer states the dewatering method assumed and the discharge route.
What fill material can go under foundations?+
Imported select fill approved against the specification, tested to modified Proctor ASTM D1557 and compacted in layers. Site material is reused only where the geotechnical report and the consultant allow it.
Which documents should come with the enquiry?+
The geotechnical report, the topographic survey, the grading plan, the BOQ cut and fill quantities, the site city and the programme. With those the offer can price rock, dewatering and imported fill as separate lines.
Who supplies Site Preparation & Earthworks in Saudi Arabia?+
NLS Contractors (Northlane Solutions Company) supplies Site Preparation & Earthworks across Saudi Arabia, including Riyadh, Jeddah, Dammam and Jubail. Send your specification and quantities to info@nlscontractors.com or info@northlanesolution.com for a quotation.