My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
_ENFORCEMENT - C1981017 (12)
DRMS
>
Day Forward
>
Enforcement
>
Coal
>
C1981017
>
_ENFORCEMENT - C1981017 (12)
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
11/1/2020 12:46:40 PM
Creation date
10/4/2012 9:32:37 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981017
IBM Index Class Name
Enforcement
Doc Name
Bid Documents (IMP) Violation CV-91-02-355-002
Media Type
D
Archive
No
Tags
DRMS Re-OCR
Description:
Signifies Re-OCR Process Performed
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
13
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
problems existed - the material the company placed in the drain <br /> was scooped up with a front end loader at the waste rock pile - <br /> therefore it was not sized, it contained fines, and it had not <br /> been analysed to insure its durability. The company then dumped <br /> the loose material in the gully, without any preparation to the <br /> drain and without working the material into the sidewalls. This <br /> resulted in a slug of loose material lying in this drain that <br /> already had eroded at the interface of material and sidewall, <br /> undercutting the sidewalls, and in times of high flow could <br /> conceivably completely slide out of the drain. Certainly the fines <br /> contained in the material are a source of additional sediment to <br /> streamflow in any size rain event. <br /> We continued down the haulroad. Some fill slopes have vegetation <br /> on them, some are bare. Dan Matthews stated that he thought that <br /> some seeding had been done on the upper switchbacks, and certainly <br /> some slopes farther down the road were known to have been seeded <br /> back in the days of Doug Bowman (roughly 1984) . The seeded slopes <br /> later pointed out did look nice. Where there was vegetation on the <br /> upper slopes there was evidence of pedestalling, ie the plant was <br /> holding the underlying soil in place while sheet and rill erosion <br /> lowered the soil surface all around the plants. <br /> It did not appear that the ditches followed any apparent design - <br /> they deepened and filled as we walked them. Downcutting was <br /> evident both in the ditch and in the road surface as run-off formed <br /> its own channels. We came to RD-4, another downdrain written in <br /> the October violations. It too had been filled with buckets of <br /> material from the waste rock pile. According to the company 4-5 <br /> feet of material had been placed in the drain which still was deep <br /> with meandering vertical sidewalls. <br /> It began to rain. The ditch on the inside of the switchback at RD- <br /> 3 barely exists - rather than a defined channel, numerous gullies <br /> carry the run-off. Farther down the road we come to culvert#5 (C- <br /> 5) which carried the runoff from the inside ditch, under the road <br /> and down the outside slope. THere was a moderate flow which was tan <br /> and opaque. Dan and the company took water samples. No upstream <br /> samples could be obtained. <br /> We did go down to see the confluence of the unnamed drainage <br /> receiving the sampled wastestream and Dutch Creek. Though it had <br /> been raining in both watersheds the stormwater from the Dutch Creek <br /> watershed had not yet reached that point as the unnamed drainage <br /> was turbulent and Dutch Creek was clear. Lew pointed out that we <br /> were below 016 discharge to the unnamed drainage. We backtracked <br /> to the waste pile area and found the unnamed drainage above 016, <br /> approximately where Mitch had sampled last fall. The channel was <br /> running semi-cloudy and Dan and the company took samples. The only <br /> source of this intermittent stream is the disturbed and undisturbed <br /> areas near #4 , so it appeared that the run-off from the roads which <br /> was just sampled upstream was being diluted by the undisturbed run- <br /> off. Of course several things play a part in the difference in the <br /> waters. Factors such as where we were time-wise in relation to the <br />
The URL can be used to link to this page
Your browser does not support the video tag.