UNITED STATES DEPARTMENT OF TRANSPORTATION 

FEDERAL AVIATION ADMINISTRATION 

WASHINGTON, DC 

RDM, LLC, 

Complainant, 

TED STEVENS ANCHORAGE 

INTERNATIONAL AIRPORT, 

Respondent. 

- 1 1 

' ) — 1 

Docket No. 16-09-14 

AFFIDAVIT OF JOHN E. JOHANSEN. P.E. 

STATE OF ALASKA ) 

) ss. 

THIRD JUDICIAL DISTRICT ) 

John E. Johansen being first duly sworn, deposes and says: 

1. I am an engineer for State of Alaska, Department of Transportation 

and Public Facilities and am the Manager of Engineering, Planning and Environmental 

of the Ted Steven Anchorage International Airport. I am a licensed by the State of 

Alaska as a Professional Engineer. 

2. The dewatering plan submitted by AGLAD Postmark, LLC, 

("AGLAD") for a building permit showed nine dewatering trenches radiating firom and 

draining to a central collection point. From this collection point the water was to be 

pumped through a discharge hose to a new 36" culvert to be installed under the North 

Tug Road. The foregoing is evident on the attached highlighted copy of an EEIS plan 

ANC - 0050 

Affidavit of John E. Johansenr Page 1 of 4 

RDM, LLC v.ANC Docket No. 16-09-14 
sheet C 1.0, dated 6-10-06, captioned "SITE DEWATERING PLAN" and previously 

submitted in the above matter as ANC-AGLAD-0217. 

3. As indicated in a detail located in the upper left quadrant of the 

plan sheet, the dewatering trenches were designed to be dug to the bottom of the peat, 

which I belive to be approximately 15 to 20 feet deep in this the area. The trenches 

were to be 5'wide on the bottom and have 2:1 side slopes. With that depth of peat and 

those slopes, the completed trenches would be 65' to 85' wide at the surface. Even if 

only 10 feet deep, the trenches would still be 45 feet wide. 

4. My understanding of the reason for dewatering the site was to 

enable the peat to be removed and replaced with silty-sand and sandy-silt mined from 

airport property north of the tenants site. Because silty-sand and sandy-silt cannot be 

compacted below water, I understood that dewatering of the excavation would be 

necessary to place and compact this silty-sand and sandy-silt. It is my understanding 

this is why the trenches in the dewatering plan were designed to be excavated to the 

bottom of the peat, enabling the entire depth of the excavation to be dewatered. A note 

on the dewatering plan, "THE CONTRACTOR SHALL ENSURE THAT FILL CAN 

BE PLACED IN THE DRY", supports the above stated understanding. 

5. Dewatering (pumping) would have been required continuously 

during the peat excavation and backfill with silty-sand and sandy-silt, as once the pump 

was shut off, the excavation and trenches would have filled back up with water over 

time. Although I do not know to what extent the trenches may have been pumped when 

they were dug in the summer of 2008, dewatering clearly was not completed, and would 

Affidavit of John E. Johansenr ANC - 0051 Page 2 of 4 

RDM, LLC v.ANC Docket No. 16-09-14 
be complete only upon completion of the dewatering plan: trenching to the bottom of 

the peat layer and pumping from the trench bottom until dry. It appears clear to me that 

has never occurred. 

6. The dewatering trenches actually dug are less than V2 the number 

and less than V2 the total combined length of the nine shown in the dewatering plan. 

They also appear to be only a few feet deep, as opposed to 10' to 20' deep, and only 

several feet wide at the surface as opposed to 45' to 85' wide. The sides of the trenches 

have sloughed since being excavated. It also does not appear that any centralized 

dewatering sump was installed, nor does it appear the culvert was ever installed under 

the tug road as planned. Although Note 1 on Sheet C 1.0 indicates that the contractor 

may vary the configuration of the trenches, it is quite clear that the existing trenching by 

AGLAD's contractor, seen as dark lines mostly on Lot 2B on previously-provided 

ANC-0002 and appearing as full of water in October 2009 on ANC-008 and ANC-009, 

would not serve the purpose of enabling the site to be dewatered down to the bottom of 

the peat as is clearly the intention of AGLAD's dewatering plan submitted by the 

approved by the airport. Those photographs also show that the site has not been 

noticeably dewatered. 

STATE OF ALASKA 

NOTARY PUBLIC 

Jeanette A. Luckey 

My Commission Expires With Office 

't^ . V 

J 6 ^ E. Johansen) 

^ ^ «;>j,.» ^ 

Affidavit of John E. Johansenr 

RDM, LLC v.ANC 

ANC-0052 

Page 3 of4 

Docket No. 16-09-14 
SUBSCRIBED AND SWORN TO before me this 3 ^ day of December, 

2009, at Anchorage, Alaska. 

r 

STATE OF ALASKA^y^. 

NOTARY PUBLIC ^ 

Jeanette A. Luckey 

My Commission Expires Wrth Offioe 

V^JA^^KXUI. G- vjlu 

Notary Public in and for Alaska 

My Commission Expires 

Jaska '.^^f, 

Affidavit of John E. Johansenr 

RDM, LLC v.ANC 

ANC • 0053 

Page 4 of4 

Docket No. 16-09-14 
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ANC-0054