North End Resurfacing/Change Order No. 2August 16, 2005
Kyle Schellinger
Schellinger Construction Company, Inc.
P.O. Box 39
Columbia Falls, MT 59912
Re: Kalispell City Airport — North End Surfacing Improvements
Dear Kyle:
CIVIL As we discussed yesterday on -site at the Kalispell City Airport, Robert Peccia
TRANSPORTATION and Associates (RPA) understands your concerns about Contract Time and Liquidated
Damages regarding the unscheduled employment of the Engineer and more specifically
ENVIRONMENTAL the Resident Project Representative (RPR).
ENGINEERS In the past four weeks RPA has observed the work that Schellinger has
performed. Throughout the period of finding unforeseen difficulties with the subgrade we
have managed to develop workable solutions. We have met on -site three times (August
1, 8, & 15'h) and walked the site on each occasion to observe areas of concern and have
generally finished each meeting with some direction on how to proceed. We understand
that some issues remain and are working on the following items:
• Liquidated Damages for Unscheduled Employment of the Engineer.
• Working with Todd Berg and the New Hangar Construction.
+ Drainage between hangar pads and between Taxiway D & F.
+ Utility Crossings
• Revised Change Order #2 quantities for Geogrid and P-208.
• Blue Topping (high lathe) the portions of the TW not being modified.
• Remaining Topsoil not being used on project.
Liquidated Damages for Unscheduled EmDlovment of the Engineer
The construction completion date, pending the approval of CO#2 will be revised
to September 9, 2005. Included in your original construction schedule are 7.5 days to
pave the TW, Apron and Access Road. Following asphalt pavement placement there is
approximately five (5) calendar days for pavement marking, topsoiling, and final cleanup.
As we discussed yesterday, if Schellinger Construction continues to work diligently and
completes the closeout construction items with five days after pavement completion, RPA
will not seek any liquidated damages for the unscheduled employment of the Engineer.
Working with Todd Berg and the New Hangar Construction
In a letter dated August 13, 2005, you again wrote about the concern over the
new hangar construction affecting Schellinger's construction schedule. Currently most of
Todd's equipment and materials are either mobile or stored on his or adjacent building
pads. We hope that you can continue to coordinate your activities on whatever remains in
your way with Todd. If this can not be worked out, the City will need to get involved as
P.O. Box 5653 they are the "landlords" and have a contract with Todd Berg.
825 Custer Avenue
Helena, Montana 59601 Drainage between hangar pads and between Taxiway D & F
(406)447-5000
FAX (406)447-5036 RPA will work up a profile of the drainage with actual elevations of the adjacent
www.rpa-hln.com hangars and the Electrical Transformer Pad and RCP. Field survey information is being
plotted and this information will be forthcoming in a separate mailing.
Kyle Schellinger
Schellinger Construction
Page 2 of 3
Utility Crossings.
During yesterdays on -site meeting with both Wayne Ristine (Flathead Electric)
and John Swanson (NWE) areas of taxiway and utility crossings were discussed. The
following is a summary of my observations:
Taxiway C:
1. FEC to deaden secondary electrical line to north
2. Schellinger to redig and replace —155 ft of secondary conduit (3" PVC)
3. Schellinger to check on the status of natural gas line in the presence of NWE
4. FEC to reinstall secondary line in new conduit
5. NWE to repair damaged gas line
Taxiway I!:
1. Schellinger to lower natural gas line in the presence of NWE.
Taxiway E:
1. Schellinger to lower natural gas line in the presence of NWE
2. Schellinger to lower other conduits and restore depth of cover as much as
possible.
Taxiway F s& G:
1. Schellinger to continue with the Modified Pavement Section included in Change
Order #2.
I have asked the utility companies to send RPA any of their charges for
observation and /or new electrical lines. We have requested that Schellinger keep tract of
time and materials. Our RPR will do likewise. If the findings indicate the utilities pumped
up from their originally installed depths we will submit these costs as claims to the City.
If the findings are that the original utilities were placed at the wrong elevation, RPA will
pay the claims.
We will determine if pumping has occurred by seeing if the utilities have
remained at a relatively flat invert (staying at the bottom of the trench) or if they have
moved to different elevations due to heaving of subgrade materials.
Revised Change Order #2 quantities for Geogrid and P-208
RPA is currently working on the revised quantities for Geogrid and substitution
P-208. This information will be forthcoming in a separate mailing to include the revised
Change Order #2 quantities.
Blue Topping (high lathe) the portions of the TWs not being modified.
The western end of Taxiway B, C, D, F & G that are not to have the modified
pavement section, can have the subgrade blue topped using high lathe, to provide
demarcation so that 4" of P208 can be installed over P154.
Remaining Topsoil not being used on project.
We will seek an answer from the City on whether any remaining topsoil
stockpiles need to be bladed smooth, and seeded, or left in some acceptable shape for the
City's impending use elsewhere.
Kyle Schellinger
Schellinger Construction
Page 3 of 3
In any questions or concerns arise to topics discussed in this letter please contact
me at you earliest convenience.
Sincerely,
ROBERT PECCIA & ASSOCIATES
Philip Porrini, P.E.
Project Manager
CC. Fred Leistiko, Airport Manager
Brandon Theis, RPR
FAA1RP0RTSUCALISPELL CrrY-2003\NORTH END SURFACINGkontadmin\corresp\050816ks_engr-tnne.ltr.doc
Robert Peccia & Associates
TRANSMITTAL LETTER
Date:
August 16, 2005
Project #:
Attention:
Kyle
Regarding:
Kalispell ity Airport
Message To:
Name: Kyle Schellenger
Firm/Agency: Schellinger Construction Company, Inc.
Address: P.O. Box 39
City, State, Zip: Columbia Falls, MT 59912
Phone Number: 892-2187
Message From:
Name: Phil Porrini
Trimcmitted are the fallnwinv, items -
Item No.
Copies
Desert tion
1
3
CO #2 (one by fax)
F:UIRPORTSV ISPFI.I. CfTY-20 WORTH END SU AON6—.dminc WM I6ks rt CO.i�nd«
RPmnrkc!
Please review the enclosed revised Change Order.
cc. Fred Leistiko, Airport Manager, Fax: 758-7758
*825 Custer Avenue* *Helena, MT 59601* * Phone 406-447-5000* * Fax 406-447-5036*
PROJECT TITLE: Kalispell City Airport — North End Surfacing
PROJECT NO.:
CONTRACT DATE: July 6, 2005
OWNER: City of Kalispell
CONTRACTOR: Schellinger Construction
Change Orders must be accompanied by an itemized cost breakdown. You are hereby requested to comply
with the following changes from the Contract Documents. (Show separate costs for materials, labor,
equipment, and miscellaneous. Show percent where applicable.)
COST OF CHANGES
ITEM
DESCRIPTION OF CHANGES - ESTIMATED
TOTAL
NO.
QUANTITIES & UNITS
TOTAL
COST
MAT'LS.
L
E
M
UNIT
A
Q
I
COST
s
u
S
o
i
R
P
C
1.
Furnish and Install Geogrid (BX1200)
8,660 SY
$4.94/sy
$42,780.40
2.
Eliminate P-154 over the Geogrid
-2,219 CY
$26.00/cy
($57,694.00)
3,
Substitute P-208 over the Geogrid
2,219 CY
$32.00/cy
$71,008.00
4,
Eliminate P-602 Prime Coat
-45.2 tons
$300.00/ton
($13,560.00)
This is an estimate of geogrid, final quantity will
be determined at the completion of base course
placement.
TOTAL COST - MATERIALS, LABOR, EQUIPMENT & MISC.
OVERHEAD & PROFIT @ %
GRAND TOTAL - THIS CHANGE ORDER $42,534.40
Original Contract Price
Current Contract Price Adjusted by Previous Change Order
Cost this Change Order (+ or -)
$ 1,199,612.85
$30,777.85
$42,534.40
New Contract Price including this Change Order $1,272,925.10
The completion date as set forth in the Contract Documents shall be (unehanged, increased, deerease ) by
7 calendar days.
The date for completion of all work will be September 9, 2005
CO - 1 Rev. 9/00
Description and Justification for Change:
1. See attached letter from Schellinger Construction (8/11/05).
2. See attached sketch for Modified Pavement Section which includes Geogrid placement
3. See attached Sheet 1 with areas to apply the Geogrid BX 1200.
4. See attached Sheet 2 with areas to apply the P208 Modified Pavement Section
5. See attached letter from NTL Engineering & Geoscience
When poor subgrade soils were discovered shortly after excavation began, Change Order #1 (July 28, 2005)
was implemented to include excavation and subgrade replacement for wet, soft and yielding materials with on -
site dry materials. This repair process has been completed, however, in areas of construction traffic there is
still some yielding (depressions and rutting) on the subgrade materials.
On August 8, 2005, the Contractor (Al and Kyle Schellinger and Marc Blanden — Schellinger Construction) met
with the Engineer (Phil Porrini, Ryan Mitchell and Brandon Theis — Robert Peccia & Associates), the
Geotechnical Engineer (Ken Munski and Ryan Wade — NTL Engineering) and the Owner (Fred Leistiko —
Airport Manager). Observations were made and recommendations for a test section were carried out by the
Contractor. The test included placement of geotextile separation fabric, Tensar BX1100 Geogrid, 24 inches of
P-154 and full vibratory compaction. The results met or exceeded specifications. The gravel thickness,
however, was beyond what was requested and for the next test the Contractor cut the thickness to 18 inches
of P-154 on August 11, 2005. The compaction results again met specifications.
In an effort to firm up the proposed pavement section in areas that are still yielding or which are anticipated to
have high construction traffic, a Geogrid needs to be added. For these areas we have selected a Tensar BX
1200 Geogrid, (heavier — and stronger than BX1100 used in the test section) which needs to be placed over
the geotextile separation fabric along Taxiway A and portions of the connecting hangar access taxiways. We
have also determined the need to use the geogrid at culvert and utility line crossings.
The next step after placement of geotextile separation fabric and Geogrid, will be the substitution of P-208 for
P-154 material. Placement of 16 inches of just one material (original design included 4" P-208 and 12" P-154),
will reduce construction traffic and eliminate the need for blue topping, grading and compacting the subbase
surface. The P-208 has a higher structural value than P-154 and will lock in with the Geogrid material (BX
1200) better to produce a surface capable of supporting the aircraft it is designed for and accommodating
limited construction traffic.
Repetitive construction traffic over approved subgrade, base course and pavement will not be allowed.
Prime coating on the top of the crushed aggregate base course has been waived. The completed base course
on the apron looks tight and therefore we have decided that the prime coat (P-602) can be "waived."
Surety consent is required if the net increase exceeds 20% of the Original Contract Amount.
SURETY CONSENT
The Surety hereby consents to the aforementioned Contract Change Order and agrees that its bond or bonds
shall apply and extend to the Contract as thereby modified or amended per this Change Order. The Principal
and the Surety further agree that on or after execution of this consent, the penalty of the applicable
Performance Bonds or Bonds is hereby increased by $ (100% of the Change Order amount) and
the penalty of the applicable Labor and Material Bond or Bonds is hereby increased by $ (100%
of the Change Order amount).
COUNTERSIGNED BY MONTANA RESIDENT SURETY
AGENT
IN
CO - 2 Rev. 9/00
Seal
Recommended by: /s/ Philip Porrini, P.E.
Accepted by:
August 16, 2005
Engineer Date
Contractor Date
Owner Date
FAAIRPORTSWALISPELL CITY-2003\NORTH END SURFACING\contadmin\CO#2,DOC
CO - 3 Rev. 9/00
AUG-11-2005 THU 10:28 AM SCHELLINGER CONSTRUCTION FAX NO. 4068922187
P. 02
Schellinger Construction Co., Inc.
P.O. BOX 39
COLUMBIA FALLS, MT 59912-0039
PI IUNE, (406) 892-2188
FAX: (406) 692-2187
Ryan Mitchell, P.E., L.S.I.
Robert Peccia & Associates
P.O. Box 5100
Kalispell, MT 59903
Date: August 11, 2005
RE: Kalispell City Airport
2005 North End — Surfacing Tmprovements
Subject: BX1200 Geogrid Installation Price Decrease
Mr, Mitchell,
AL SCHELLIN01fR
CUrFSCHELLIWGE H
GORGE SCHMIDT
On August 10, 2005 Schellinger Construction provided RPA with justification of our
price for the BX 1200 Geogrid. In conversation with you, you had told me that you
thought our price of $5.20 seemed high and that you thought that 15% for overhead and
profit should not apply to the materials. Section 90-05 of the general provisions states
that extra work is paid for on either a force account basis or a negotiated price where
there is an agreed allowance for overhead and profit. Montana Public Works states (see
attached document) that the contractors fee for overhead and profit are 15% of all labor,
equipment, and materials. Schellinger Construction feels that this fee is reasonable and
fair and therefore does not agree that we should not add 15% to our material price.
In looking at our price though we have decided that our installation price can be
decreased. Instead of $0.90 per square yard we are willing to decrease this price by $0.23
and install the geogrid for $0.67 per square yard. This will then make our final price for
the geogrid be $4.94 per square yard as shown by the following:
$3.10 per square yard to purchase the material + 17% waste ($3.10 * 1.17% = $3.627),
plus $0.67 for installation ($3.627 „I. $0.67 = S4.297), plus 15% for overhead and profit
($4.297 * 1.15% = $4.9416) or $4.94 per square yard.
Schellinger Constniction would also like to inform you that we have extra BX 1100
geogrid from a MDOT project that is currently being constructed. Schellinger
Construction purchased this fabric before all of the material price increases. We have
approximately 4200 square yards of BX 1100 on this project and would be able to
provide this material for $0.50 less than the above quoted price for the BX 1200.
Ilowever, if we use this material and there is not enough to cover the extent of which it is
needed on this contract we will have to finish the contract utilizing the BX 1200 for the
is price of $4.94 per square yard. The crew on this project will be coming home tonight
HUU-11-000b 1HU IU:Cd AM SUELLINGER CONSTRUCTION FAX NO, 4068922187
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around 2:30 p.m. so if RPA chooses to use theBX 1100 we will need to knowbefore
then so that we can get it delivered here.
If you have any questions, problems, or concerns please feel free to contact Me.
Sincerely,
Kyle Schellinger
Project Matiager
ce: Phil Porrini
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GEOGRID NOTES:
�[ 1. TW A do PORTIONS OF CONNECTING HANGAR ACCESS TW.
2. LIMITED COVERAGE ON TW F do TW G.
3.AREAS BASED ON 1 FT. OFFSET FROM PAVEMENT EDGE.
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100 0 100 200
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(SCALE IN FEET)
AUG. 12, 2005 SHEET TITLE PROJECT TITLE ,�/ SHEET
CHANGE ORDER #2 KALISPELL CITY AIRPORTO�pT pEc�s
PROECT N0. GEO GRID IMPROVEMENTS c = 1
TW—AREA.DWG 1 7
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P-208 NOTES:
I �[ 1. TW A do PORTIONS OF CONNECTING HANGAR ACCESS TW.
2. REDUCED COVERAGE ON TW A BECAUSE P-154 ALREADY INSTALLED
I do STABLE.
I 3. AREAS BASED ON 1 FT. OFFSET FROM PAVEMENT EDGE.
I
100 0 11D0 200
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(SCALE IN FEET)
AUG. 12, 2005 SHEET TITLE PROJECT TITLE SHEET
DATE CHANGE ORDER #2 KALISPELL CITY AIRPORT��R7
PROJECT NO. P208 CRUSHED IMPROVEMENTS b 2
TW—AREA-DWG BASE COURSE I 1
FILE NO. ��'S$OC1w��y 2 OF 2
1392 13" Avenue SW
P.O. Box 3269
Great Falls, MT 59403-3269
August 15, 2005
Robert Peccia & Associates
PO Box 5653
Helena, MT 59601
Attention: Mr. Phil Porrini, P.E.
Subject: Subgrade Observation
Kalispell City Airport
Kalispell, Montana
Dear Mr. Porrini:
Tel. (406) 453-5400
Fax. (406) 761-6655
ntlengineering.com
At your request on August 8, 2005, we accompanied you on a site visit during construction of
the Kalispell City Airport in Kalispell, Montana. The purpose of the site visit was to assess exposed
subgrade conditions and make recommendations for subgrade improvements, as appropriate. We
previously performed a Geotechnical Investigation for the pavement improvements which was dated
April 5, 2005.
As anticipated by the Geotechnical Investigation, some areas of the lean clay subgrade to
support the new taxiway and apron pavements were on the order of 10% above optimum compaction
moisture as determined by ASTM D698. The very wet subgrade, the proximity of groundwater, and
the use of very heavy construction equipment (including a. scraper) contributed to unstable subgrade
conditions encountered over portions (primarily the central and northern portions) ofthe project. Prior
to our site visit, areas of low subgrade stability had been improved by removal of the wet lean clay to
depths of about 2 feet and replaced with drier Iean clay from the southern portion of the project. The
drier lean clay was reported compacted in a single lift, at moisture contents several percent below
optimum compaction, resulting dry densities generally above 95% the ASTM D698 maximum for the
top one foot of subgrade. The drier lean clay replacement was reported to be reasonably successful
in many areas, but some areas still remained unstable or only marginally stable under heavy
construction traffic. Our visit of August 8, 2005 was to focus on improvements to subgrade stability
for construction in the central and northern portions of the project, where subgrade replacement with
the drier clay had already taken place or was about to take place.
After our initial site observations on August 8, 2005, we recommended that areas of unstable
subgrade be subexcavated and an initial single lift of gravel (pit run, uncrushed or crushed) on the
order of 18-inches thick be incorporated at the bottom of the pavement section. The use of a geogrid
at the bottom of the initial lift was also recommended to improve the effectiveness of the thickened
section in improving stability for construction. The thickening of the pavement section and
incorporation of the geogrid was also to improve long. term performance of the pavement section on
Subgrade Observation Page 2
Kalispell City Airport, Kalispell, Montana NTL Engineering & Geoscience, Inc.
the lean clay subgrade. We further recommended that field trials be conducted with various
thicknesses of the initial gravel lift to best balance effectiveness in stability improvement against the
added cost of additional gravel and geogrid. During our site visit, a trial section of about 20-24 inches
of mostly uncrushed P-154 subbase on the separation fabric and geogrid was constructed in the least
stable subgrade area near the north end of the project along Access Taxiway B. The trial section
appeared very stable under construction traffic, so additional trials using lesser thicknesses ofthe initial
gravel lift were recommended.
Subsequent to our site visit, additional trial sections were reportedly constructed, and the most
economical subgrade section providing effective stabilization for construction and anticipated
improvement to long term pavement was selected as follows:
P-401 Asphalt Concrete 3.0 inch
P-208 Crushed Base Course 16.0 inch
*Completed as a single lift.
Geogrid BX 1200
Separation Fabric
Total Section Thickness 19.0 inch
In our opinion, the section described above will provide improvement to the long term
pavement performance where marginal subgrade stability existed making construction difficult with
heavy equipment. Since the economics favor this thickened section, and since field trials have
reportedly established its effectiveness in stability improvement under heavy construction traffic, use
of the section is recommended in those areas observed as being of low or marginal subgrade stability.
Please be cautioned that the thickened pavement section presented above (like the originally
planned pavement section) will effectively carry the light aircraft loads to be applied, but the pavement
section may not effectively carry the much heavier loads which can be applied by construction
equipment. While the construction methods and equipment to be employed are soley determined by
construction contractor, the limited construction load carrying capacity of the light aircraft pavement
section should be considered when selecting construction methods and equipment. The construction
contractor may find it advantageous to use relatively light equipment or to further thicken selected
pavement areas to be as haul routes as construction expedients. Such construction expedients would
not typically require change orders or extra compensation.
Please call if you have any questions regarding this project of if we can be of further assistance.
Sincerely,
Kenneth D. Munski, P.E.
Senior Materials Engineer
In duplicate
Enclosure