2022-09-29_PERMIT FILE - C1980007A ‎(2)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 9/29/2022
• 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

Average Lower
Reach (1)Flow (cfs)Width (ft)Depth (ft)Velocity
(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
(1)This refers to the lowest reach potentially impacted by mining.
TABLE 3
PRE-MINING CHANNEL HYDRAULIC CHARACTERISTICS
Basin
Number
Channel Thalweg Slope (%)Dominant Discharge (Q) Near Mouth
G:\WWE\831-032\921\Engr\Exhibit 55B\
MCC_subsidence_55B_2020_Tables.xlsx\Table 3
Wright Water Engineers, Inc.
December 23, 2020
Prprd By: AWP
Chkd By: JMK