2021-07-29_INSPECTION - M2001022

• Permit No: M2001022
• IBM Index Class Name: Inspection
• Doc Date: 7/29/2021
• Doc Name: Corrective Action Documentation
• From: Loveland Ready-Mix
• To: DRMS
• Email Name: PSH
• Media Type: D
• Archive: No

To: Ms. Faucher-English
Date: July 28, 2021
Page 2
On the cross-sections,we placed the approximate water surface elevation) reported by PLS
Corporation, and lines representing approved reclamation slopes as described in Rule
3.1.5(7) (CMLRB, 2019). We placed a cross section in each zone as labeled in the "King
Survey" (Attachment 2). In zones where the King Survey indicated potential variation
' from Rule 3.1.5(7),we placed two cross-sections. We evaluated each cross-section for its
compliance with Rule 3.1.5(7) as shown in Figure 1.
Above WL, if Rule Slope Rule 3.1.5(7)
Line Above or at CS,
Max Slopes
4760 slope complies _
(Evaluate minimum o
1S' horizontally)
Appox. Water Level
4735.5 ft
4740
' J Surveyed
Ground
_ --4720 Surface
I 0+00 1+25
Below WL, if Rule Slope—//
Line Below or at GS, Zone 9-a
' Slope complies
(Evaluate minimum of
20' horizontally)
' Figure 1 Evaluation Approach Explanation
King Survey Comparison
' We chose Zones 12, 19 and 20 for comparison purposes. The King Survey shows,
generally, that slopes in Zone 12 are gentle,Zone 19 are right at Rule slopes, and Zone 20
is steeper. This allowed a range of slope estimation comparison. We overlaid the images
provided in the King Survey that showed their slope estimates into AutoCad. We then
placed sections,perpendicular to the topographic contours near the King Survey evaluation
locations and repeated the process described in the previous section. We placed the cross
sections such that King's point closest to the water's edge runs through the cross section.
Then on each cross section, we plotted King's reported slope by percentage. We also
repeated the comparison in Zone 25 at the maximum slope indicated by King.
' We refer to the water surface elevation as"approximate"because it is constantly fluctuating based on time
of day,wind patterns,river stage elevation and upgradient groundwater conditions.
' 20210727 SlopeEvaluation_DRMS RTC SFE.docx T E L E S T O