Addendum - Quantity Information 080912.pdf

Item Quantity Units Notes

Existing Riprap Removal ‐ 1.31' Depth 2722 CY

Assuming 30% Loss ‐820 CY

Salvaged Riprap Meeting Spec. 1902 CY

Riprap Placement ‐ 1' Depth 2080 CY

Salvaged Riprap Meeting Spec. ‐1902 CY

Contractor Furnished Riprap 178 CY

Item Quantity Units Notes

Common Excavation Total 956 CY

Topsoil Removal ‐733 CY

Common Excavation 223 CY

Due to cutting the slope of the dike under the fabric to be a 4:1

The Details on Sheet C‐302 are over exaggerated to give a better view of what is taking place. The contractor will remove 10‐11 ft. of riprap, separate out the material not in spec., which is estimated to be around 30%.

Then place back a 12 in. thick section of riprap in the same location. THe reason for the hatching underneath the riprap in the detail is to show that there might need to be a little bit of fill underneath the riprap in order to bring it up so the top of the riprap matches the existing riprap height. This is due to the average depth of the riprap being 1.31 ft. and only putting back 1 ft.NOte that this is just average, some areas will need it and others will not. The 12 in. riprap section wil lthen match the topsoil that is being graded at a 4:1 from the top of the dike. There will be some material excavated out to anchor the fabric but that will be palced back in the same trench.

JGAR200345 Maintain Sewage Lagoon ‐ Secondary South

RIPRAP BREAKDOWN

* Note: These quantities represent the government estimate and are for informaiton purposes only, Contractor's are to verfiy amounts needed. No modifications will be completed on these items.

COMMON EXCAVATION BREAKDOWN