2021-02-05_PERMIT FILE - C1980007A ‎(4)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 2/5/2021
• Doc Name: STREAM CHANNEL PARAMETERS
• Section_Exhibit Name: Exhibit 55B Stream Channel Parameters and Changes Due to Mining-Induced Subsidence
• Media Type: D
• Archive: Yes

TABLE 3
PRE-MINING CHANNEL HYDRAULIC CHARACTERISTICS
Basin
Channel Thalweg Slope (%) Dominant Discharge (Q) Near Mouth
Number Average Lower
1) Flow (cfs) Width (ft) Depth (ft) Velocity
Reach ft/sec
3 11.1% 15.5% 9.5 8 0.3 3.1
29 9.7% 4.8% 4.9 6 0.3 2.9
32 8.5% 4.0% 13.3 10 0.4 3.2
35 5.3% 5.6% 64.0 22 0.7 3.8
36 7.1% 5.9% 25.8 14 0.5 3.5
37 8.3% 5.4% 49.6 19 0.7 3.7
39 15.9% 8.6% 29.0 10 0.8 3.5
41 30.0% 25.3% 3.5 2 0.5 3.5
'> This refers to the lowest reach potentially impacted by mining.
G:\WWE\831-032\921\Engr\Exhibit 55B\ Wright Water Engineers,Inc. Prprd By:AWP
MCC_subsidence_55B_2020_Tables.xlsx\Table 3 December 23,2020 Chkd By:JMK