Grading
Grading

GRADING, EXCAVATION & SITE PREPERATION

The creation of a great building relies heavily on processes that start well before construction begins. Besides the foundations of a building or road, the surrounding soil must be prepared through careful grading and site preparation. Your choice of site preparation contractors is no less important, which is why so many developers and property owners in Omaha, Council Bluffs, Sarpy County, Doge County, and Saunders County turn to Valley Corporation.

RIVERS EDGE DEVELOPMENT

Owner: City of Council Bluffs, Iowa
General Contractor: Valley Corporation
Project Scope: Mass grading, installation of sanitary and storm sewers mains and manholes.

MAJOR ITEMS OF WORK

60,000 CY of imported borrow sand fill

3,781 LF of RCP storm sewer ranging from 15" - 60"

197 VF of Storm Sewer Manholes ranging from 54" - 144"

2,715 LF of 8" PVC Sanitary Sewer

120 VF of 48" sanitary sewer manholes

Installing two (2) separate stormceptor systems

OMAHA PUBLIC SCHOOLS - 42ND AND V STREET

Owner: Omaha Public Schools
General Contractor: Valley Corporation
Project Scope: Site preparation for new middle school

MAJOR ITEMS OF WORK

36,400 SF demolition of 3 buildings

Removal of 87 trees

26,000 SY pavement removal

220,000 CY on-site excavation

18,560 CY earth surchage

4,411 tons of buried debris removal

New foundation for 5,800 SF building moved on-site

1,264 CY of flow able fill placement

24 acres of native grass fescue

WALMART 50TH AND AMES STREET SITE PREPERATION

Owner: Walmart
General Contractor: Carlson Construction
Project Scope: Demolition of existing building and attached strip mall, overlot grading and utilities

MAJOR ITEMS OF WORK

120,000 SF building demolition

40,000 SY pavement removal

30,000 CY on-site excavation

50,000 off-site export

1,350 LF 8"-12" water main

1,250 LF VCP sanitary sewer

4,300 LF RCP and HDPE storm sewer

2 StormTech Retention systems

WALMART COUNCIL BLUFFS SITE PREPERATION

Owner: Omaha Public Schools
General Contractor: Oakview DCK
Project Scope: Overlot grading for new building

MAJOR ITEMS OF WORK

21,000 CY on-site dirt

188,000 CY of imported dirt

75,000 CY surcharge exported

OMAHA 144TH & BLONDO STREET SITE PREPERATION

Owner: Nebraska Department of Roads
General Contractor: TAB Construction
Project Scope: Demolition of 144th street and grading for street widening

MAJOR ITEMS OF WORK

39,000 SY pavement removal

55,000 CY on-site dirt work

26,000 CY exported dirt

SPRINGS AT LEGACY SITE PREPERATION

Owner: Continental Properties Company
General Contractor: McShane Construction
Project Scope: Site preparation and utility infrastructure for a new multiple unit apartment complex

MAJOR ITEMS OF WORK

21,000 CY site grading

6,600 SY pavement removal

5,265 1" to 36" HDPE storm sewer

17 curb inlets

1,419 LF 6" & 8" PVC sanitary sewer

1,818 LF 6" & 8" ductile iron water main

144 VF storm & sanitary manholes

1,264 CY of flow able fill placement

24 acres of native grass fescue

Site Preparation

Proper site preparation sets the stage for all that follows. Get it wrong and you stand to suffer poor drainage, damage to utilities and infrastructure, cracks and eventual failure in retaining walls and foundations, and uneven settling that causes leaning structures and buckling roads.

Site preparation usually begins by clearing the land of vegetation, from the macro level (trees and shrubs) to the micro (grasses and other biomass). This is done down to the roots, since any biological matter left behind can lead to uneven settling.

Grading

Once the land has been cleared, we follow through with mass grading. Earth is moved from hilly areas to fill in ditches and depressions, and finishing touches are applied by scrapers and grading machinery to ensure a level surface.

Once the grading is done, it’s time to deal with the soil aeration that results from our work. Like a cake, the soil exists in layers, and if those layers aren’t compacted, you’ll notice settling or soil shifting later. Padfoot compactors and vibratory rollers deal with moisture and air in the soil so you’re building on firmer ground.

Reinforcement and Erosion Control

While the ground on which construction takes place can be leveled, geography and topography often find us on sites where leveling has its limits. If building takes place on or near a hill or near a body of water, soil reinforcement is often necessary to control erosion and prevent eventual collapse.

Excavation

Having completed our site preparation and grading, it’s time to begin excavation. One of the most important purposes of excavation comes down to ensuring water always goes where it’s supposed to, whether we’re digging to lay sewer and water mains, or setting up drainage systems that protect your foundation and the structure built upon it.

Only once these steps have been planned and painstakingly executed can we move on to the work on the slab or basement that will eventually form the foundation of new construction, or laying the subsurface of a road or highway. Put simply, there’s too much at stake to leave anything to chance!

Preparing for the Preparations

As a general contractor, we can sympathize with the countless regulations governing construction in Nebraska, the reams of permits those regulations dictate, and the site inspections that follow. We’re here to help with each step in that process. For that reason, and so many others, choosing the right site preparation contractors in the Omaha area should begin and end with Valley Corporation.