Temporary wide gravel construction entrance to be installed in i-295 on-ramp from 11th street, se. Construction access for dc waters clean rivers project - division h - cso 007 shaft site. Access from ramp will be needed from january to april of 2015 during slurry wall construction. Site to be restored upon completion of work. Trail detour permitted separately under dtops #97792. Erosion control approved under dcra permit bciv1400047. Contractor to coordinate work with ddots awi team and 11th street bridge project.

Shallow dewatering system to assist in near surface excavation at cso 007 site of dc waters clean rivers project div h. Thirteen (13) borings in total. Eight (8) primary dewatering wells and three (3) contingency dewatering wells of 8" diameter, and two monitoring wells of 6" diameter. Up to 7 dewatering wells and 1 monitoring well drilled to 25 bgs, with remaining 4 dewatering wells and 1 monitoring well drilled to bgs. Mud rotary drilling method. Mot measures already permitted and in place under tops pa10172156.

Support of excavation for near surface work at cso 007 shaft site for dc waters clean rivers div h project. Sheeting and shoring to be installed adjacent to ramp c-3 near intersection of 11th street bridge. Soe system will consist of sheet piles, tie backs, walers, and struts. Shallow dewatering wells permitted separately through tops #110058. No change to existing ddoe-approved site plan or ddot-approved mot measures. Reference tops permits #97792, 103139, 10172156; and bciv1400047.

Soil borings for jet grouting at cso 007 site of dc waters clean rivers project div h, which falls in ddot row. Jet grouting needed for ground improvement to facilitate excavation beneath the 54 inch sewer and for mining of the adit connecting the anacostia river tunnel to the cso 007 shaft. Thirty-eight (38) borings of 8" diameter, to max depth of 118 bgs. Mud rotary drilling method. Mot measures already permitted and in place under tops pa109849.

Near surface structures construction for dc waters clean rivers project div h - cso 007 site. Construction of below-grade concrete approach channel, vent chamber, and odor control vault facility, to be installed adjacent to ramp c-3 near intersection with 11th street bridge. No change to existing ddoe-approved site plan or ddot-approved mot measures. Soe permitted separately via tops 109849. Reference tops permits #97792, 103139, 10172156; and bciv1400047. Construction impact assessment report 6b submitted to ddot by dc water under separate cover.

Temporary wide gravel construction entrance to be installed in i-295 on-ramp from 11th street, se. Construction access for dc waters clean rivers project - division h - cso 007 shaft site. Access from ramp will be needed from january to april of 2015 during slurry wall construction. Site to be restored upon completion of work. Trail detour permitted separately under dtops #97792. Erosion control approved under dcra permit bciv1400047. Contractor to coordinate work with ddots awi team and 11th street bridge project.

Shallow dewatering system to assist in near surface excavation at cso 007 site of dc waters clean rivers project div h. Thirteen (13) borings in total. Eight (8) primary dewatering wells and three (3) contingency dewatering wells of 8" diameter, and two monitoring wells of 6" diameter. Up to 7 dewatering wells and 1 monitoring well drilled to 25 bgs, with remaining 4 dewatering wells and 1 monitoring well drilled to bgs. Mud rotary drilling method. Mot measures already permitted and in place under tops pa10172156.

Support of excavation for near surface work at cso 007 shaft site for dc waters clean rivers div h project. Sheeting and shoring to be installed adjacent to ramp c-3 near intersection of 11th street bridge. Soe system will consist of sheet piles, tie backs, walers, and struts. Shallow dewatering wells permitted separately through tops #110058. No change to existing ddoe-approved site plan or ddot-approved mot measures. Reference tops permits #97792, 103139, 10172156; and bciv1400047.

Soil borings for jet grouting at cso 007 site of dc waters clean rivers project div h, which falls in ddot row. Jet grouting needed for ground improvement to facilitate excavation beneath the 54 inch sewer and for mining of the adit connecting the anacostia river tunnel to the cso 007 shaft. Thirty-eight (38) borings of 8" diameter, to max depth of 118 bgs. Mud rotary drilling method. Mot measures already permitted and in place under tops pa109849.

Near surface structures construction for dc waters clean rivers project div h - cso 007 site. Construction of below-grade concrete approach channel, vent chamber, and odor control vault facility, to be installed adjacent to ramp c-3 near intersection with 11th street bridge. No change to existing ddoe-approved site plan or ddot-approved mot measures. Soe permitted separately via tops 109849. Reference tops permits #97792, 103139, 10172156; and bciv1400047. Construction impact assessment report 6b submitted to ddot by dc water under separate cover.

Support of excavation for near surface work at cso 007 shaft site for dc waters clean rivers div h project. Sheeting and shoring to be installed adjacent to ramp c-3 near intersection of 11th street bridge. Soe system will consist of sheet piles, tie backs, walers, and struts. Shallow dewatering wells permitted separately through tops #110058. No change to existing ddoe-approved site plan or ddot-approved mot measures. Reference tops permits #97792, 103139, 10172156; and bciv1400047.