My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
HYDRO31589
DRMS
>
Back File Migration
>
Hydrology
>
HYDRO31589
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 8:55:13 PM
Creation date
11/21/2007 2:03:00 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981026
IBM Index Class Name
Hydrology
Doc Date
10/26/1994
Doc Name
4th QTR 1994 INSPECTION & ANNUAL CERTIFICATION
From
GREYSTONE
To
MLRD
Permit Index Doc Type
SEDIMENT POND INSPECTIONS
Media Type
D
Archive
No
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
10
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
Defective Spillways No (see Riprap across the bed of [he emergency spillway is <br /> Comment) disintegrating. A current analysis [Sediment, Erosion, <br /> Discharge by Computer Aided Design (SEDCAD+)] <br /> suggests that riprap is not required in the emergency <br /> spillway for erosion protection from a 25-year, 24-hour <br /> storm event. There is no evidence of erosion of the <br /> emergency spillway. <br /> Slight deformation (from circular to elliptical) of the <br /> primary spillway tube is evident at the outlet. No <br /> deformation of the protective expanded metal screen <br /> welded to the pipe suggests that the deformation <br /> developed during placement. <br />Dewatering Device No (A The plastic sheet in the bottom of the gate riser noted in <br />Clogged deficiency was 1993 had been removed. Vegetative overgrowth that <br /> corrected at partially blocked the out(all of the principal spillway was <br /> the time of removed. <br /> the <br /> inspection.) <br />Faulty Gates, No <br />Baffles, Pumps <br />Other No <br />Additional Comments: None <br />Maintenance Required: <br />Repair damage to the embankment caused by rodent activity to maintain the integrity of the dam. <br />Repair damage to the upstream face of the embankment caused by water (water line) action. <br />Reseed disturbed areas. <br />Recommendations: <br />With regard to repair of the embankment due to rodent burrow activity, recommend that burrows be <br />uncovered and in-situ backfill be compacted to dam construction specifications. Disturbed areas should <br />be reseeded (unless the area is to be protected by enhanced methods, such as riprap, as discussed below). <br />This maintenance work should be accomplished before the next high water season. At the present degree <br />of burrowing activity, backhoes and mechanical tampers might be required. <br />Rodent control is recommended to eliminate rodent burrowing activity. Recommend that the muskrats <br />be trapped and removed from the site. Recommend the erection of raptor perches. Should burrows <br />continue to be a problem, additional rodent control procedures to halt burrowing activity on the dam will <br />need to be instituted. <br />Erosion of the upstream face of the dam needs to be arrested. Enhanced vegetative efforts might be tried, <br />such as seeding and fertilizing with placement of excelsior mats. However, a more maintenance tree design <br />Canadian Mine Pond # 1, Quarterly Inspection Report and Annual Cenification, 24 October 1994 <br />Page 3 of 5 <br />
The URL can be used to link to this page
Your browser does not support the video tag.