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2022-08-09_REPORT - M1988112 (2)
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2022-08-09_REPORT - M1988112 (2)
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Last modified
8/11/2022 8:40:03 PM
Creation date
8/11/2022 8:09:47 AM
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Template:
DRMS Permit Index
Permit No
M1988112
IBM Index Class Name
Report
Doc Date
8/9/2022
Doc Name
Tailings Dam Inspection
From
Engineering Analytics, Inc
To
DRMS
Annual Report Year
2022
Email Name
LJW
THM
Media Type
D
Archive
No
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UAM NAMt: Sari LUIS I aninq Uam DATE OF REPORT:,AUgUSt 5.2022 <br /> TAILING DAM INSPECTION FORM <br /> ITEMS REQUIRING ACTION BY OWNER TO IMPROVE THE SAFETY OF THE DAM <br /> MAINTENANCE 0 MINOR REPAIR 0 MONITORING <br /> ❑(1)PROVIDE ADDITIONAL EROSION PROTECTION- <br /> ❑(2)CLEAR BRUSH FROM <br /> ❑(3)INITIATE RODENT CONTROL PROGRAM AND PROPERLY BACKFILL EXISTING HOLES: <br /> ❑(4)GRADE CREST TO A UNIFORM ELEVATION WITH DRAINAGE TO THE UPSTREAV SLOPE <br /> ❑(5)PROVIDE SURFACE DRAINAGE FOR: <br /> 0(6)MONITOR: Continue monitoring riliing and gullying at right downstream groin. <br /> ®(7)MONITOR: Continue underdrain jetting cleanout and camera inspection of accessible lengths of underdrain pipes. <br /> 0(6)MONITOR: Per Item 49, continue monitoring erosion along the side slopes of the drop structure, and begin preparing mitigation <br /> plans for 2023. Mitigation will require erosion repair,followed by reseeding and installation of erosion control blankets, <br /> and/or cutting in shallow shales along the slope to reduce runoff flow path lengths. <br /> ®(9)OTHER: Protect toe drain area from disturbance by cattle. <br /> al(10)OTHER Per 2020 Inspection,consider installing a concrete structure for collection of drain discharges to facilitate access for <br /> cleanout and monitoring of the drains. <br /> ENGINEERING o EMPLOY AN ENGINEER EXPERIENCED IN DESIGN AND CONSTRUCTION OF DAMSTO: <br /> (Plans and specifications to be Improved by CDRMS prior to construction.) <br /> ❑(11)PREPARE PLANS AND SPECIFICATIONS FOR REHABILITATION OF THE DAM: <br /> ❑(12)PREPARE AS-BUILT DRAWINGS OF: <br /> ❑(13)PERFORM A GEOTECHNICAL INVESTIGATION TO EVALUATE THE STABILITY OF THE DAM. <br /> ❑(14)PERFORM A HYDROLOGIC STUDY TO DETERMINE REQUIRED SIZE OF FLOOD BYPASS/SPILLWAY: <br /> ❑(15)PREPARE PLANS AND SPECIFICATIONS FOR AN ADEQUATE SPILLWAY. <br /> ❑(16)SET UP OR IMPROVE MONITORING SYSTEM: <br /> ❑07)OTHER: <br /> ❑(18)OTHER: <br /> Figure 1 Overall Site Plan and Photo Log <br /> Figure 2 2022 Annual Dam Safety Inspection <br /> Figure 3 Piezometer Levels <br /> Figure 4 Underdrain Flow <br /> Attachment 2 2022 Inspection Photos <br /> �j Photographs (Photos 1-22) nts (Piezometer and underdrain data) <br /> ENGINEER'S INSTRUCTION: Instructed o 011A Z414, s with the structure and how to monitor and inspect the dam and <br /> appurtenant works in the interim period b :t �tr�,}'latar4c9�r� 'nspections. N Yes ❑ No <br /> . /yL/��2�•: <br /> Comment: ; <br /> : 33319 s <br /> • •Q <br /> A ? i <br /> Professional Engineers Signature: t(.C� Date: 2G 2— <br /> r <br /> Reviewed by: _-- — - Date: - <br /> OwnerlOwner's Representative <br /> Page 3 of 4 <br />
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