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_INSPECTION - C1982057 (50)
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_INSPECTION - C1982057 (50)
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Entry Properties
Last modified
11/8/2020 11:34:13 AM
Creation date
2/23/2011 8:16:43 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982057
IBM Index Class Name
INSPECTION
Doc Name
Inspection Report
From
DRMS
To
Seneca Coal Company
Inspection Date
9/21/2010
Email Name
JRS
SB1
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
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September 21,2010 C-1982-057/Seneca H-W Mine JRS V <br /> except the as-built channel is approximately 100 feet shorter than the designed channel(the as-built channel does <br /> not go up the slope as far as the designed channel). There was some side-cutting along the north edge of the <br /> channel for its entire length and minor erosion in the channel itself. Seneca has constructed a surge pond in the <br /> channel at approximately station 12+10 on the Division's channel profile. There was some erosion at the inlet of <br /> the surge pond and at the outfall of the surge pond,continuing to the end of the channel,where it becomes PM-1. <br /> Overall channel PM-lA was stable and appeared to be functioning as designed. <br /> -Channel PM-1B flows on the south side of charnels PM-1 and PM-lA in a southwest direction,turning <br /> northwest to intercept PM-1 and PM-1 A. The upper portion of the as-built channel is approximately 275 feet <br /> shorter than the designed channel. The lower portion of the as-built channel is moved approximately 75 feet west <br /> of its designed location and intercepts channel PM-1/PM-lA approximately 75 feet lower than designed. There <br /> was some side-cutting along the north side of channel PM-1B, some erosion in the channel bottom and some <br /> under-cutting of the TRM in places resulting in little vegetative cover in those locations. The as-built channel <br /> profile is basically identical to the designed profile with the exception of the lower approximately 285 feet. This <br /> area is up to 10 feet lower in elevation in the as-built channel as compared to the designed channel due to the <br /> change in channel location. This makes for a slightly steeper gradient in than the designed channel. Overall <br /> channel PM-lA is stable and appears to be functioning as designed. No problems were noted with the slightly <br /> steeper gradient in the lower portion of the channel. <br /> -Channel PM-lC runs on the south side of channel PM-1 in basically a northwest direction along the disturbance <br /> boundary and intercepts channel PM-1 at approximately station 4+86(on the Division's channel profile). The as- <br /> built channel location is basically the same as the designed channel location except the as-built channel is <br /> approximately 125 feet longer than designed channel. The channel was well vegetated and there were no erosional <br /> problems noted. The as-built channel profile for the lower 300 feet of the channel(where there is a design profile) <br /> is between 14 and 40 feet higher than the design. This is a result of a slight variation in the post-mining <br /> topography and the change in the alignment of the lower portion of the channel. The overall grade of the lower <br /> portion of the channel is not affected. Channel PM-IC was stable and appeared to be functioning as designed. <br /> -Channel PM-2A runs on the west side of the disturbed area and flows generally from south to north into Pond <br /> 016A. The as-built channel was generally between 25 to 150 feet west of the designed location but generally <br /> followed the same path as the designed channel. The as-built channel is approximately 165 feet shorter than <br /> design because it does not go up the slope as far as the designed channel. Additionally,the as-built channel has a <br /> fork at the upper end,where the channel design is straight. The lower portion of the channel,below stock tank T- <br /> 27,was well vegetated and stable with very little erosion. There was more erosion in and around the channel <br /> above stock tank T-27 and Seneca was fixing this area, including portions of the channel, at the time of the <br /> inspection. There are also three surge ponds in channel PM-2A,one at station 6+84, one at station 16+06(just <br /> below stock tank T-27)and one at station 19+59(just above stock tank T-27). There was some erosion entering <br /> and exiting stock tank T-27 and the surge pond at station 19+59,above the stock tank,which Seneca has fixed. <br /> The as-built channel profile is between 6 and 40 feet lower than the design profile due to changes in the post- <br /> mining topography and the resulting change in the channel's alignment. Overall,the grades of the as-built <br /> channel, although not exactly the same as the designed channel, do approximate those of the designed channel. <br /> There was also a spoil spring observed flowing above station 7+97. Although there were some erosional problems <br /> in channel PM-2a, Seneca has fixed them and the channel was, overall, stable. The channel and associated surge <br /> ponds and stock tank all appeared to be functioning as designed. <br /> -Channel PM-213 runs approximately 500 feet east of channel PM-2A and flows in a northwest direction, <br /> intercepting channels PM-2 and PM-3 and flows into Pond 016A. The as-built channel location deviates from the <br /> design location, including its intercept location with channel PM-2 and the intercept locations of channels PM-2C <br /> and PM-2D(with channel PM-2B)at the upper end of channel PM-213. The channel was well vegetated,with <br /> Number of Partial Inspection this Fiscal Year: 3 <br /> Number of Complete Inspections this Fiscal Year: 2 <br /> Page 6 of 18 <br />
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