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' Minimum Length <br />in Feet of Full <br />Sized Auger from <br />Crossing Conditions Leading End of <br />Casing <br />Rock 0 <br />' - dr <br />Hard pan, clay, hard sand - (dry) 0* <br />clay <br />(wet) 20 <br />tStable cohesive soils (dry) 0 <br />6) Length - Casings and uncased carrier pipes shall be of sufficient <br />length to extend under all pavements and in no case shall the end <br />of the casing be closer than four (4) feet (eight (8) feet preferably) <br />from the pavement edge including paved shoulders, or two (2) <br />feet from back of curb plus additional length as necessary to <br />extend to the excavated slopes of the jacking and receiving pits. <br />Slope requirements are detailed in 5.D. of this exhibit. The ends of <br />casings under limited access facilities and all casings for flammable <br />' materials shall be no closer to the pavement edge (including paved <br />shoulders) than the toe of the front slope. Casings may be <br />required to extend to the right -of -way limits or frontage roads to <br />' provide for maintenance access on limited access facilities where <br />periodic maintenance activities on the utility are expected. <br />ICasings shall also extend beyond pavement areas that are to be <br />1 07/03 16200 -14 03- 1438.A <br />1 <br />(wet) <br />20 <br />1 <br />L oos e unstable soils <br />( dr y) <br />20 <br />' <br />(wet) <br />40 <br />Crossings requiring dewatering are to be considered <br />as wet in the <br />above table. <br />* Full sized augers are <br />not required if lateral <br />movement of the <br />cutting head has been <br />otherwise restricted <br />in a satisfactory <br />manner. <br />6) Length - Casings and uncased carrier pipes shall be of sufficient <br />length to extend under all pavements and in no case shall the end <br />of the casing be closer than four (4) feet (eight (8) feet preferably) <br />from the pavement edge including paved shoulders, or two (2) <br />feet from back of curb plus additional length as necessary to <br />extend to the excavated slopes of the jacking and receiving pits. <br />Slope requirements are detailed in 5.D. of this exhibit. The ends of <br />casings under limited access facilities and all casings for flammable <br />' materials shall be no closer to the pavement edge (including paved <br />shoulders) than the toe of the front slope. Casings may be <br />required to extend to the right -of -way limits or frontage roads to <br />' provide for maintenance access on limited access facilities where <br />periodic maintenance activities on the utility are expected. <br />ICasings shall also extend beyond pavement areas that are to be <br />1 07/03 16200 -14 03- 1438.A <br />1 <br />