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The portion of the reach stretching from station 23+75 to 29+45 has an <br />average gradient of 3.0 percent. The bottom width in this section is about <br />BO feet, and consequently, the section is grass lined. Cross-section 6 is <br />located at station 26+20. The surveyed channel geometry and hydraulic <br />summary for this cross-section are presented in Table 7-12.1. <br />Cross-section 5, at station 20+48, is found within the section that <br />stretches from station 18+40 to station 23+75. This section has an average <br />gradient of 4.8 percent, and the channel at the cross section is riprap <br />lined with a Dso of 9-inches. The surveyed channel geometry and hydraulic <br />summary £or this cross-section are presented in Table 7-12.1. <br />Cross-section 9, at station 16+45, is found within the middle section of <br />the channel that stretches from station 15+65 to station 16+90. This <br />section has an average channel gradient of 1.8 percent, and is grass lined. <br />The surveyed channel geometry and hydraulic summary for cross-section 9 are <br />presented in Table 7-12.1. <br />Cross-section 3, at station 12+75, is found within the section that <br />stretches from station 9+98 to station 15+65. This section has an average <br />gradient of 2.6 percent, and is riprap lined with a Dso of 9-inches. The <br />surveyed channel geometry and hydraulic summary fox this cross-section are <br />presented in Table 7-12.1. The lowest part of Channel 1 middle stretches <br />from station 6+80 to 9+98. This section of channel has an average channel <br />gradient of 0.3 percent and is grass lined. <br />The break between Channel 1 middle and Channel 1 lower occurs at station <br />6+60, which is where runoff conveyed from an undisturbed catchment enters <br />Channel SIIPM-1 through Culver 15A. The upper section of Channel 1 lower <br />stretches from station 9+10 to 8+80. The average channel gradient for this <br />reach is 0.3 percent and is grass lined. <br />The lower section of Channel 1 lower stretches from station 0+60 to 9+10. <br />The average channel gradient in this section is 2.8 percent. This section <br />is riprap lined with a Dso in excess of 12-inches. There are two surveyed <br />cross-section in this section; Section 2 at station 2+95 and Section 1 at <br />station 0+60, respectively. The surveyed channel geometry and hydraulic <br />summary for the cross-sections are presented in Table 7-12.1. Below <br />station 0+60 the channel becomes the delta £or Pond 002. • <br />TR-37 4 Revised 10/OS <br />