B09_Amd6_-_QR_No36_Attach5_-_DEVA_CCTV_Report_11_03_22_0006.pdf

2000 Maple Street Missoula, MT 59808

406.721.4320 djanda.com

CCTV Summary

To: Veronica Jacobson and Kim Eisberg (DSC-NPS)

From: Mike Whelehon (DJ&A), Mike Finken (DJ&A), and Phil Torres (Total Drain Solution)

Cc: Bradley Harris, Jessica Hearns, and Charles Thompson (DEVA-NPS)

Date: November 03, 2022

Re: CCTV Final Report DEVA 318717 Rehabilitate Water and Wastewater Systems at Furnace Creek and Cow Creek Areas

This report describes the CCTV inspection results of Total Drain Solutions (subconsultant of DJ&A) during their field inspections beginning June 2022 and ending September 2022.

Work Summary

June 2022

Total Drain Solution (TDS) crew worked June 6th through June 15th.

They met with DEVA-NPS staff for a pre-field vehicle and equipment inspection.

The TDS crew CCTV inspected the gravity sanitary sewer main along Old Ghost Road at Cow Creek. There was one section they could not video due to blockage in the pipe that prevented their camera from accessing the pipe.

See Exhibit A for work that was performed in the Furnace Creek Area.

See Exhibit B for work that was performed in the Cow Creek area along Old Ghost Road.

See Table 1 for summary of CCTV inspection work.

September 2022

Total Drain Solution (TDS) crew worked September 20th through September 22nd.

TDS crew accompanied DEVA-NPS field crew to Furnace Creek lagoon area. DEVA-NPS jetted the existing gravity sanitary sewer main between the lagoons and the manhole where the force main connects from Cow Creek (~2000 linear feet west of Highway 190).

The Cow Creek pump station was off while the TDS crew inspected the gravity main and the force main.

Memo November 4, 2022

At Furnace Creek, TDS CCTV inspected the gravity sanitary sewer main between the gravity manhole and the lagoon.

TDS CCTV inspected approximately 200 linear feet of the force main utilizing the manhole (described above) working upstream.

TDS CCTV inspected the cleanout access at Highway 190 prior to the force main crossing under the highway. The cleanout was exposed by NPS staff and was found to be encased in concrete so TDS could not video the section beneath Highway 190 since the cleanout pointed upstream. This cleanout was used to inspect the force main line going upstream from the cleanout.

TDS CCTV inspected the existing gravity sanitary sewer main along Old Ghost Road. This section was inspected in June by TDS and one section was blocked and could not be videoed. The NPS jetted out this line after the August 2022 storms, and NPS asked if the previously blocked section could be videoed. TDS re-videoed portions of this line.

Video Reports and Summary

Two reports were provided by TDS for the work. These reports are provided in Exhibit C and Exhibit D. A summary table with recommendations is provided in Table 1.

2000 Maple Street

Missoula, MT 59808

406.721.4320 djanda.com

Table 1 - CCTV Summary Data Date

Start

MH

End MH Pipe Length

CCTV'ed Pipe Size

(in) Pipe

Material Pipe

Condition Video File Name Notes Recommended Action

Furnace Creek 1 June 2022 2 1 28 6 PVC Unknown furnace creek 2-1_0000.mp4 Totally submerged Clean, install larger pipe 2 June 2022 3 2 326 6 PVC Unknown furnace creek 2-3__0000.mp4 Totally submerged Clean, install larger pipe 3 June 2022 2 Down 20 6 PVC Unknown Furnace Creek Downline MH 2.mp4 Debris, gravel, coupling ring Clean, install larger pipe 4 June 2022 2 Up 200 6 PVC Unknown Furnace Creek Upline MH 2.mp4 Algae, buildup on sides Clean, install larger pipe 5 Sept 2022 2 1 191.67 4 PVC Fair/Good MH 2-1.mp4 Needs cleaning Clean, install larger pipe 6 Sept 2022 2 Down 173 6 PVC Fair/Good MH 2 Downline.mp4 Needs cleaning Clean, install larger pipe 7 Sept 2022 3 Down 102.1 6 PVC Good MH 3 Down Line.mp4 Clean, install larger pipe 8 Sept 2022 3 Up 63.75 6 PVC Good MH 3 Upline.mp4 Scale and buildup in bottom Clean, install larger pipe 9 Sept 2022 4 3 99 6 PVC Good MH 4 - 3 Upline.mp4 Clean, install larger pipe

10 Sept 2022 4 Down 137.75 6 PVC Fair MH 4 Down Line.mp4 Needs cleaning, Build up on sides Clean, install larger pipe 11 Sept 2022 5 Down 164 6 PVC Good MH 5 Down Line.mp4 Clean, install larger pipe 12 Sept 2022 5 Up 40 6 PVC Good MH 5 Up Line.mp4 Blockage at 40' Clean, install larger pipe 13 Sept 2022 6 Down 140.75 6 PVC Good MH 6 Downline.mp4 Needs cleaning, Build up on sides Clean, install larger pipe 14 Sept 2022 6 Up 118.4 6 PVC Good MH 6 Upline.mp4 Clean, install larger pipe 15 Sept 2022 7 Down 158 6 PVC Good MH 7 Downline.mp4 Minor Build up on sides Clean, install larger pipe 16 Sept 2022 7 Up 75 6 PVC Good MH 7.mp4 Clean, install larger pipe 17 Sept 2022 8 Down 151 6 PVC Good MH 8 Downline.mp4 Clean, install larger pipe 18 Sept 2022 8 Up 132 6 PVC Good MH 8 Upline.mp4 Clean, install larger pipe

19 Sept 2022 FM Up 175 8 PVC Good Cow Creek Pressurised Pipe to Cleanout

Upline to Old Ghost Road.mp4 Submerged sections, build up on sides Clean

Cow Creek - Old Ghost Road 1 June 2022 10 11 10 6 PVC Good old ghost rd 10-11_0000.mp4 Build up on sides and bottom Clean

2 June 2022 1 2 330 6 Clay Poor old ghost rd mh 1-2_0000.mp4 Heavily mineralized to 124' then clear Replace Pipe

3 June 2022 2 4 390 6 Clay Marginal Old Ghost Road MH 2-4 Pull Back.mp4 Heavy Roots, heavy build up on sides and bottom, offset joints Replace Pipe

4 June 2022 4 5 293 6 Clay Marginal Old Ghost Road MH 4-5.mp4 Heavy Roots, heavy build up on sides and bottom, offset joints Replace Pipe

5 June 2022 7 8 125 6 Clay Poor Old Ghost Road MH 7-8.mp4 Heavy Roots, heavy build up on sides and bottom, offset joints Replace Pipe

6 June 2022 8 9 42 6 Clay Poor Old Ghost Road MH 8-9.mp4

Heavy Roots, heavy build up on sides and bottom, offset joints, changes to PVC at 18'

Replace first 18', newer PVC after 18' is OK

7 June 2022 9 10 148 6 PVC Fair Old Ghost Road MH 9-10.mp4 Heavy build up on bottom Heavy Clean 8 June 2022 11 12 148 6 PVC Good Old Ghost Road MH 11-12 Pull Back.mp4 Heavy build up on bottom Heavy Clean

9 June 2022 13 14 8 6 Clay Poor Old Ghost Road MH 13-14.mp4 Very Heavy roots, submerged, blocked Replace Pipe

10 June 2022 14 17 687 6 Clay Poor Old Ghost Road MH 14-17.mp4

Heavy roots, build up on sides, grade change at 246', grade change at 274', MH at 394', grade change at 463', grade change at 554', MH at 643', blockage at 687' Replace Pipe

11 June 2022 18 19 3 6 PVC Marginal Old Ghost Road MH 18-19.mp4 Heavy build up on sides, grade change and blockage at 3'

Heavy cleaning, point repairs at grade changes, replace

12 Sept 2022 10 Down 99.5 6 PVC Good Old Ghost Road MH 10.mp4 Blockage foreign object at 99' Clean

13 Sept 2022 11 Down 34 6 Clay Fair Old Ghost Road MH 11 Downline.mp4 Blockage foreign object, root intrusion, lots of gravel Clean, cut roots, CIPP line

14 Sept 2022 11 Up 26 6 PVC Good Old Ghost Road MH 11.mp4 Blockage at 26' Clean 15 Sept 2022 12 Down 161 6 Clay Marginal Old Ghost Road MH 12 Downline.mp4 Many roots, almost every joint Clean, cut roots, CIPP line 16 Sept 2022 12 Up 115 6 Clay Fair Old Ghost Road MH 12.mp4 Roots Clean, cut roots, CIPP line

P a g e | 3

TDS Safety Plan August 17, 2022

Maps showing the CCTV locations at Cow Creek and Furnace Creek

2) Typical Schedule (see details on attached work plan) !"#$%&' (#'') %#'% *+,, -' ((./ +$01'&2'3 %4%+$02 25' 2+6'0&%,' 78 25' 87,,7*+$4 291+&%, 0&5'3",':

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Day 1 – 3

After NPS shuts down the pump(s) feeding the force main pipe so as to limit water ow, TDS will mobilize CCTV equipment to pipe, then proceed to launch the manual push CCTV camera into manholes/clean outs/access points working in both directions to record/document overall condition of up to 2000’ LF of 8”pipe. Overall lineal feet CCTV’d will vary based on accessibility of manholes, clean out/access points, weather, flow of water through the pipe among other factors. The revised plan is to work from manholes/clean outs in both directions as possible.

Then work from ends of forced main upstream into the 4” force main pipe.

Also, included is CCTV investigation of up to 7 force main clean outs located safely off of highway 190. These clean outs will be opened and CCTV’d as far as the push camera will go. Any other additional forced main clean outs will require a change order for an additional day CCTV investigation work at a rate of $3500/day.

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EXHIBIT A

Mike.Finken Callout Forcemain Section - Pipe Not Accessible

Mike.Finken Line

Mike.Finken Callout Forcemain Section Videoed Up-pipe

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MH-2

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UNUSED

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Mike.Finken Callout Change from Forcemain to Gravity Flow

Mike.Finken Text Box Cleanout-1

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MH-8

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MH-7

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MH-4

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MH-5

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MH-3

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MH-6

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The first CCTV pipe videos can be viewed by clicking here.

The second CCTV pipe videos can be viewed by clicking here.

Currently all drain lines including beneath Old Ghost Road (Cow Creek) and Furnace Creek (both gravity fed from the lagoons and force main pipe from east side of highway 190) all need to be mechanically descaled and/or waterjet cleaned to remove debris, heavy root intrusion, grease, scale/grease/debris buildup to restore proper flow through these drain systems. (See individual pipe sections with photographs for detailed descriptions)

Both the Furnace and Cow Creek wastewater systems have a network of manholes and sanitary sewer lines that Total Drain Solutions evaluated as part of larger system evaluation. In general, the manholes are in good repair and the cast iron drainpipe is in fair condition at both locations. By using all existing manholes TDS was able to determine pipe buildup conditions and recommendations for pipe rehabilitation.

Upon completion of the cleaning process, pipe rehabilitation will need to take place to return pipe to regular diameter and improve flow to normal pipe capacity. Exceptions identified during the video investigation are noted below.

Death Valley Furnace & Cow Creek CCTV https://www.dropbox.com/sh/ufblc2jpc09tem7/AADbjffJC1cAV6H9u2oZaPr5a?dl=0 https://www.dropbox.com/sh/9h9tfoq7j0vfd9y/AADkOLre60XUz2xNe6nRKdEma?dl=0 Mike.Finken Text Box

EXHIBIT B

Mike.Finken Text Box Cow Creek Area CCTV MH Labels

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MH-1

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MH-2

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MH-3

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MH-4

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MH-5

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MH-6

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MH-7

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MH-8

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MH-9

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MH-10

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MH-12

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MH-13

Mike.Finken Text Box

MH-14

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MH-15

Mike.Finken Text Box

MH-16

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MH-17

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MH-18

Mike.Finken Text Box Cow Creek CCTV

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MH-11

not opened due to its location (which could be a source of I&I). That manhole is in / near a creek and appears to be sealed closed with silicone. Video of the lines to and from that manhole and the depth of the manhole were accomplished using the camera from manholes 4 and 6 and using a locator to determine the depth.

Several manholes did show moisture. Much of the moisture appears to be seeping in around the top rings and running down the walls. There was at least one manhole that appeared to have some moisture seeping in around the bottom of the wall (MH 3). Another possible source of I&I identified was the dump station that is covered by a blue tote at this time. This was not tested but it was observed that the other dump station was full to the curb with water but the dump station with the tote was dry. Rainwater would have to go somewhere. Photos are included with the individual manhole photos between manholes 2 and 3.

Many of the manholes have a configuration called an external drop as shown here.

This is noted becasuse the external drop prevented complete investigation of some of the lines. The top arm of the piping has been sealed shut with hydraulic cement.

The largest issues noted with piping were between manholes 7 and 8 as well as manholes 16 and 17. Those issues are documented below with images and descriptions. Also included are images of each manhole (except 23 where no issues were noted but a picture wasn’t taken). Also of note, manhole 24 had a large paper clog that should be flushed and cleared prior to system recommisioning.

Manhole 14 also has an issue that may be a safety issue. A black plastic pipe of unknown source is protruding through the upper wall of the manhole and runs into the sewer line exiting the manhole.

This prevented video inspection between manholes 14 and 15. It is surmised that this is a water line that is used to flush that pipe. If that is the case, changes should be made to that set up to prevent cross contamination of the water source. This can be accomplished through the use of air gaps and backflow prevention devices. This could be a major drinking water safety issue. Photos are included in the individual manhole photos.

Both the Furance and Cow Creek wastewater systems have a network of manholes and sanitary sewer lines that Total Drain Solutions evaluated as part of larger system evaluation. In general, the manholes are in good repair and the cast iron drain pipe is in fair condition at both locations. By using all existing manholes TDS was able to determine pipe buildup conditions and recommendations for pipe rehabilitation.

Death Valley Furnace & Cow Creek CCTV

Currently all drain lines beneath Old Ghost Road (Cow Creek) and Furnace Creek near the lagoons all need to be mechanically descaled and/or water-jet cleaned to remove debris, heavy root intrusion, grease, scale buildup to restore proper flow through these drain systems.

Upon completion of the cleaning process, pipe rehabilitation will need to take place to return pipe to regular diameter and improve flow to normal pipe capacity.

Exceptions identified during the video investigation are noted below. Some follow up investigation may be desired and can be coordinated at a future date.

All the CCTV pipe videos can be viewed by clicking here.

https://www.dropbox.com/sh/011sb1wfbdwm60w/AACnLMk2tjE_acD9Q6o2R6Cfa?dl=0 Mike.Finken Text Box

EXHIBIT C

Initial July 2022 Report

CIPP Pipe Rehabilitation Process

An epoxy-saturated liner is pulled into place through existing access points, and an internal rubber bladder is inflated, pressing the epoxy against the pipe wall.

Blocked or root-intruded pipes are cleaned with tools and processes appropriate to the situation.

The epoxy cures in a few short hours, then the bladder is deflated and removed, leaving behind a clean, seamless “pipe within a pipe.”

There’s a proven alternative to pipe replacement that’s faster, less expensive and lasts just as long. Pipe lining leaves the existing pipes in place and repairs them from the inside, so you don’t have to tear out walls, floors or landscaping. When repairing drain pipes, an epoxy-saturated liner is inserted into the existing pipe and inflated, pressing the coating against the pipe walls. The epoxy cures and you are left with a clean and seamless pipe-within-a-pipe.

Prepping 80’ liner CIPP Structural Liner Before and After

Watch an animated video of the lining process by clicking here.

https://drive.google.com/file/d/1MpAYjY92Aq4dTslPvhEO4ItYK2Kk6MxR/view?usp=drivesdk Mike.Finken

Pipe appears to be in fair condition with moderate buildup throughout the pipe.

There is a fitting band stuck in the pipe as shown on the top left picture.

TDS recommends removing the band for the fitting, cleaning, and pipe rehabilitation for this section.

Furnace Creek Downline MH 2-1

Pipe appears to be in fair condition with heavy amounts of algae coating the pipe.

Due to the amount of algae TDS recommends cleaning to see condition of the covered area. There appears to be a protein shaker ball in the pipe in the top right photo. Once cleaning is complete TDS recommends pipe rehabilitation.

Furnace Creek Upline MH 2-3

Old Ghost Rd MH 1-2

Pipe appears to be in poor condition with heavy amounts of scale and buildup throughout the pipe. There is joint separation and channeling in the top left picture.

TDS recommends cleaning and pipe rehabilitation.

Mike.Finken

Old Ghost Road MH 4-2 Pull back

Pipe appears to be in fair condition with heavy scale and root intrusion throughout the pipe. TDS recommends cleaning and pipe rehabilitation.

Old Ghost Road MH 4-5

Pipe appears to be in fair condition with heavy grease buildup throughout the pipe.

TDS recommends cleaning and pipe rehabilitation.

Old Ghost Road MH 5-6

TDS was unable to camera manhole 5 and manhole 6 due to the amount of grease. TDS recommends cleaning to fully access the manholes and determine pipe condition.

Old Ghost Road MH 7-8

Pipe appears to be in poor condition with heavy root intrusion around the joints and throughout the pipe. TDS recommends cleaning and pipe rehabilitation.

Mike.Finken

Mike.Finken

Old Ghost Road MH 8-9 and throughout the pipe. There is also channeling and heavy scale throughout the pipe. TDS recommends cleaning and pipe rehabilitation.

Old Ghost Road MH 9-10

Pipe appears to be in fair condition with heavy scale and grease buildup throughout the bottom of the pipe. TDS recommends cleaning and pipe rehabilitation.

Mike.Finken

Old Ghost Road MH 11-12

Pipe appears to be in poor condition with channeling and heavy grease buildup throughout the pipe. TDS recommends cleaning and pipe rehabilitation.

Old Ghost Road MH 13-14

Pipe appears to be in poor condition with heavy root intrusion and buildup

Old Ghost Road MH 14-17 and throughout the pipe. Below pipe appears to be channeling, TDS recommends cleaning and pipe rehabilitation.

Mike.Finken

Old Ghost Road MH 18-19

Pipe appears to be in poor condition with heavy grease and debris buildup throughout manhole 18 – 19. TDS recommends cleaning and CIPP rehabilitation.

Mike.Finken

The first CCTV pipe videos can be viewed by clicking here.

The second CCTV pipe videos can be viewed by clicking here.

Currently all drain lines including beneath Old Ghost Road (Cow Creek) and Furnace Creek (both gravity fed from the lagoons and force main pipe from east side of highway 190) all need to be mechanically descaled and/or waterjet cleaned to remove debris, heavy root intrusion, grease, scale/grease/debris buildup to restore proper flow through these drain systems. (See individual pipe sections with photographs for detailed descriptions)

Both the Furnace and Cow Creek wastewater systems have a network of manholes and sanitary sewer lines that Total Drain Solutions evaluated as part of larger system evaluation. In general, the manholes are in good repair and the cast iron drainpipe is in fair condition at both locations. By using all existing manholes TDS was able to determine pipe buildup conditions and recommendations for pipe rehabilitation.

Upon completion of the cleaning process, pipe rehabilitation will need to take place to return pipe to regular diameter and improve flow to normal pipe capacity. Exceptions identified during the video investigation are noted below.

Death Valley Furnace & Cow Creek CCTV https://www.dropbox.com/sh/ufblc2jpc09tem7/AADbjffJC1cAV6H9u2oZaPr5a?dl=0 https://www.dropbox.com/sh/9h9tfoq7j0vfd9y/AADkOLre60XUz2xNe6nRKdEma?dl=0 Mike.Finken Text Box

EXHIBIT D

Final Report - October 2022

CIPP Pipe Rehabilitation Process

There’s a proven alternative to pipe replacement that’s faster, less expensive, and lasts just as long. Pipelining leaves the existing pipes in place and repairs them from the inside, so you don’t have to tear out walls, floors, or landscaping. When repairing drainpipes, an epoxy-saturated liner is inserted into the existing pipe and inflated, pressing the coating against the pipe walls.

The epoxy cures and you are left with a clean and seamless pipe within a pipe.

Blocked or root-intruded pipes are cleaned with tools and processes appropriate to the situation.

An epoxy-saturated liner is pulled into place through existing access points, and an internal rubber bladder is inflated, pressing the epoxy against the pipe wall.

The epoxy cures in a few short hours, then the bladder is deflated and removed, leaving behind a clean, seamless “pipe within a pipe.”

Watch an animated video of the lining process by clicking here.

Prepping 80’ liner CIPP Structural Liner Before and After https://drive.google.com/file/d/1MpAYjY92Aq4dTslPvhEO4ItYK2Kk6MxR/view?usp=drivesdk Mike.Finken

Cow Creek Upline MH 2-1

There is a fitting band stuck in the pipe as shown on the top left picture.

TDS recommends removing the band for the fitting, cleaning, and pipe rehabilitation for this section.

Mike.Finken Text Box Furnace

Mike.Finken

Cow Creek Upline MH 2-3

Pipe appears to be in fair condition with heavy amounts of algae coating the pipe.

Although this line was jetted there is still a significant amount of buildup throughout the pipe.

Due to the amount of algae TDS recommends cleaning to see condition of the covered area.

Furnace

Mike.Finken

Cow Creek Upline MH 3-4

Pipe appears to be in fair conditon with moderate buildup throughout the pipe.

Sections weren’t visable due to the amount of standing water.

TDS reccomends cleaning and pipe rehabilitation.

Furnace

Mike.Finken

Cow Creek Upline MH 4-5

Pipe appears to be in fair condition with moderate buildup throughout the pipes.

There is a section of the pipe that isn’t visible due to the amount of standing water.

TDS reccomends cleaning and pipe rehabilitation.

Furnace

Mike.Finken

Cow Creek Upline MH 5-6

Pipe appears to be in fair condition with slight to moderate buildup throughout the pipe. TDS recommends cleaning and pipe rehabilitation.

Mike.Finken Text Box Furnace

Mike.Finken

Cow Creek Upline MH 6-7

Pipe appears to be in poor condition with heavy buildup throughout the pipe.

Furnace

Mike.Finken

Cow Creek Upline MH 7-8

Furnace

Mike.Finken

Old Ghost Rd MH 1-2

Pipe appears to be in poor condition with heavy amounts of scale and buildup throughout the pipe. There is joint separation and channeling in the top left picture.

Old Ghost Road MH 4-2 Pull back

Pipe appears to be in fair condition with heavy scale and root intrusion throughout the pipe. TDS recommends cleaning and pipe rehabilitation.

Mike.Finken

Old Ghost Road MH 4-5

Pipe appears to be in fair condition with heavy grease buildup throughout the pipe.

Old Ghost Road MH 5-6

TDS was unable to camera manhole 5 and manhole 6 due to the amount of grease. TDS recommends cleaning to fully access the manholes and determine pipe condition.

Old Ghost Road MH 7-8

Mike.Finken

Old Ghost Road MH 8-9 and throughout the pipe. There is also channeling and heavy scale throughout the pipe. TDS recommends cleaning and pipe rehabilitation.

Mike.Finken

Old Ghost Road MH 9-10

Pipe appears to be in fair condition with heavy scale and grease buildup throughout the bottom of the pipe. During the second camera inspection there was a blockage our team was able to push past. Due to the amount of running water, what was causing the blockage is unclear. TDS recommends cleaning and pipe rehabilitation.

Old Ghost Road MH 11-12

Pipe appears to be in poor condition with channeling and heavy grease buildup throughout the pipe. During the second camera inspection there is a possible blockage unseen, due to the amount of running water. There is heavy root intrusion throughout the pipe. TDS recommends cleaning and pipe rehabilitation.

Mike.Finken

Old Ghost Road MH 13-14

Pipe appears to be in poor condition with heavy root intrusion and buildup

Old Ghost Road MH 14-17 and throughout the pipe. Below pipe appears to be channeling, TDS recommends cleaning and pipe rehabilitation.

Mike.Finken

Old Ghost Road MH 18-19

Pipe appears to be in poor condition with heavy grease and debris buildup throughout manhole 18 – 19. TDS recommends cleaning and CIPP rehabilitation.