SUMMARY OF WORK

The Gallup Coal Fire Mitigation Project consists of three sites in Gallup, New Mexico. Project areas are located on land owned by Gallup Land Partners, LLC. The Enterprise-Brown mine fire is approximately 1.0 mile north of downtown Gallup, New Mexico (see Sheet No. 02. The Navajo No. 1 mine fire is 2.7 miles north of downtown Gallup (see Sheet No. 02). The Navajo North project area is located 3 miles north of downtown Gallup and approximately one quarter mile north of the Navajo No. 1 site (see Sheet No. 02).

This project involves mass excavation of overburden and coal, mixing and cooling of the excavated coal and backfilling at the Enterprise-Brown and Navajo No. 1 Sites and filling open subsidence features at the Navajo North Site using polyurethane foam (PUF). Work at each site will include the following:

• Enterprise-Brown Site: Excavating approximately 3,025 cubic yards of burning coal and non-burning overburden. Burning coal will be blended with non-burning overburden, allowed to cool, and backfilled into the excavated areas. Construction details are shown on design drawing Sheet Nos. 03 & 06.
• Navajo No. 1 Site: Excavating approximately 6,260 cubic yards of burning coal and non-burning overburden. Burning coal will be blended with non-burning overburden, allowed to cool, and backfilled into the excavated areas. Construction details are shown on design drawing Sheet Nos. 04 & 07.
• Navajo North Site: Backfilling three open subsidence features to mitigate the low potential fall hazard as well as help reduce the amount of air flow through the old mine workings to slow oxidation within the mine. To avoid disturbance of cultural resources, polyurethane foam (PUF) will be used as a backfill material. The PUF can be transported by hand or wheelbarrow along a path designated by AML to avoid disturbance to the area. Feature locations are shown on design drawing Sheet No. 05.

Demobilization shall be conducted in such a manner to ensure that the Contractor leaves all project areas in as good or better condition than before disturbance.