25-0815 Addendum No. 3201 1st Avenue E
PO BOX 1997
Kalispell, MT 59903
Public Works Department
Phone (406)758-7720
Fax (406)758-7831
www.kalispell.com
August 15, 2025
ADDENDUM NO. 3
Lift Station #36 Upgrade Project
EQ# 25-1781
QuestCDN # 9797748
City of Kalispell, MT
The provisions of this Addendum Number 3 shall apply to and be part of the Bidding and
Contract Documents for the Lift Station #36 Upgrade Project.
Bidders shall acknowledge the receipt of this addendum through the QuestCDN VBid electronic
bidding portal in order to submit bid.
The Bid Opening Date has been moved to September 4th, 2025, at 8:30 AM. This was
requested by bidders at the Prebid Meeting. Subsequent dates in the tentative schedule will
be delayed correspondingly except for the completion date.
Preamble & Discussion:
During the prebid, I mentioned that groundwater dewatering was not anticipated as an issue for
the project as groundwater was not encountered in the geotechnical bore holes. That statement
was incorrect. Groundwater WAS encountered at 16 ft. This elevation is within the excavation
required for the wet well. Further, bidders should review section 5.3 of the Geotechnical Report
in detail for the construction of the wet well. Additionally, bidders should review the
Measurement and Payment Section for Lift Station – Structural which requires an “engineered
shoring and bracing plan” to be provided as part of the work.
Bidders are also referred to the following text from the Geotechnical Report:
“Considering the subsurface conditions encountered and the nature of the proposed
construction, the wet well portion of the structure can be supported on a mat foundation bearing
on undisturbed native soils. However, depending on ground water levels and site dewatering, the
sands at the anticipated bearing elevation may be unstable and saturated beyond moisture levels
which are conducive to compaction; thus, disturbance of this layer must be avoided using
smooth-edged excavation equipment. We would advise a representative of the geotechnical
engineer be present during construction to further assess subsurface conditions and determine if
compaction (when possible) or other subgrade stabilization measures are warranted.”
Page 2 of 5
“Mat slab foundations should bear on properly compacted native soils, when possible. If
compaction is deemed not possible by a representative of our firm during construction, at a
minimum the surface should be statically rolled smooth. Mat foundations should be designed for
a maximum allowable soil bearing pressure not to exceed 1,000 psf. Mat slabs supported as
described may realize total settlements of up to one inch with differential settlements on the
order of one-half this magnitude.
If subgrade conditions are unstable or not suitable for use of equipment or work in the
excavation without excessive disturbance to the native soils, subgrade improvements are
warranted. Subgrade improvements options are discussed in Item 15 below.
When subgrade improvements are necessary, a minimum 12-thickness of structural fill or 6-inch
cementitious mud mat are appropriate to stabilize the surface and facilitate ongoing
construction. When the subgrade is saturated and cannot be dewatered, we would advise the use
of a mud mat in lieu of conventional gravel as the necessary vibratory compaction of the gravel
could further destabilize the subgrade soils. The mud mat should consist of a low strength
concrete with a compressive strength of at least 100 psi per ASTM D4832.
Page 3 of 5
A question was raised as to whether railing should be provided around the “dock” area shown in
the plans. Railing is required with a chain gate. Additional details will be forthcoming in a later
Addendum.
Please also reference the Project Q&A inside QuestCDN for additional information pertaining to
the project. Additional questions will be answered as they are received and reviewed.
A summary of the Q&A to date is provided below. Bidders should consider the answers to
questions in the Q&A in the preparation of their bids, even though the responses do not
necessarily require changes to the contract. Some of the responses are informational only.
However, many of the responses are meant to clarify the requirements of the project plans and
specifications.
QuestCDN Q&A Summary
1. Will the geotechnical report be provided?
a. The geotechnical report is a required download for bidding but will also be made
available here (Quest Q&A) as an attachment.
2. What project value should be used for bid bonding purposes and what is the Engineer's Estimate
for the project?
a. A project value of $3 million should be used for preliminary discussions with bonding
sureties. The engineer's estimate for construction is $3.265 million.
3. Several specifications seem to be missing for valves, piping and lift station components. Will
there be an addendum to address this?
a. Thank you for bringing this to our attention. It appears there was an error when binding
the pdf files together for the project manual. Many of the specification sections were
duplicated and others are completely missing. To avoid unnecessary confusion, a new
full project manual will be provided to all plan holders as part of Addendum No. 1 which
will eliminate the repeated specifications and include missing sections. Addendum No. 1
is expected to be uploaded to QuestCDN by 7/31/25. I apologize for the confusion and
inconvenience.
4. Will a winter shutdown be allowed?
a. Yes, a winter shutdown is anticipated as likely due to turnaround times on required
components such as pumps, valves, and electrical items.
5. Are AIS or BABA requirements a part of this project?
a. No, this project is locally funded, so AIS and BABA are not applicable.
6. What is the intended schedule for the job?
a. A Preliminary Project Schedule is included in the project manual Section 00004. Notice of
Award is anticipated on September 3, 2025 and Construction Completion is anticipated
by August 31, 2026.
7. According to the rough carpentry spec, it looks like all the framing material is to be fire treated.
Is that correct?
a. No, the framing structure doesn't need to be fire-treated.
Page 4 of 5
8. C10/C11 shows the south side of the existing slab over the existing wet well, valve vault, and
south manhole to be demoed. S100 shows the entire slab, including the northern part of the L
slab over the northern sanitary manhole to be demoed. The northern part of the slab will need
to be partially demoed for the installation of the proposed 18" CLDI pipe and shoring. Can you
confirm whether or not the north side of that existing slab should be replaced?
a. Sheet S100 is correct. The full existing slab should be removed and does not require
replacement. However, a City Standard manhole collar should be installed on the
existing manhole in accordance with the attached detail.
9. Please confirm that the gray-colored pumps shown on the loading dock on C15, C16, and C17
(square box) are for visual representation only and the Contractor should be providing only the
3 pumps on the pump room floor (colored black).
a. Yes, the grey-colored pump shown on the loading dock is for visual representation during
design to verify adequate clearances when maintenance, removal, or replacement is
required.
10. Please provide head pressure of the current force main system to allow for proper sizing of the
bypass system.
a. We don't anticipate bypass pumping as being necessary since the existing lift station can
remain active throughout construction of the new lift station. However, the existing
system is designed to pump at 520 gpm. According to the pump curve, there is a system
head of 120 feet at that flow rate. Current static head is 87 feet.
11. What permits are required for the work?
a. City Construction Stormwater Permit & SWPPP if applicable
b. City Public Right-of-Way Permit
c. State Building Permit (City has applied for and paid)
d. State Electrical Permit v. State Plumbing Permit (if applicable)
e. State HVAC Permit (if applicable)
f. MDT Utility Occupancy Permit
g. MDEQ Construction Dewatering General Permit (if necessary)
12. Can I attend the prebid remotely?
a. We have some of the engineers on the project attending remotely and we weren't going
to make it available for other participants, but had a request from someone out of town
that is running late. Here is the Teams link: Meeting Link
13. Is there a specific call out for J bolts and how often they are to be spaced in the top of the
foundation wall for the sill plate and wall framing? Sheet S001 wood general note 10 discusses
embedment’s, but its not clear if these are to be wet set or drilled and epoxied?
a. Note 10 gives the option for either cast-in anchors (j-bolts) or post-installed screw
anchors and calls for them to be at 48” o/c
14. Are there any HDU’s required for hold downs of the walls to the sill plate?
a. No HDU’s required
15. Is 3/8” plywood acceptable for interior sheet, instead of 3/8” OSB?
a. Yes, plywood would be acceptable in lieu of the OSB
16. Pre-bid mentioned a gantry crane, I’m not seeing anything on the plans for this. Can you clarify?
a. The City has its own gantry crane that will be located to the site as necessary for
maintenance. The referenced gantry crane is not a requirement of the project.
Page 5 of 5
17. What is the intended fill material for the interior elevated platform/loading dock? Sheet S314
just calls out for Rigid foam insulation.
a. Geofoam blocks. This could also be a void space
18. Is the inside ceiling also to be 3/8” OSB sheeting?
a. Yes, the interior ceiling is to have 3/8” OSB sheathing. See details on S103.
General Information:
Modifications will be bolded and highlighted in yellow in this addendum for clarification of
required changes. A general description of the required changes is provided below, with the
specific changes for the individual sections following the general description:
Section 40 61 13 – Process Control System General Requirements
• Section 1.1.A.5 was discussed at the Prebid Meeting. This section was a spill over from our
Master Spec. The section should be deleted.
The Valve Vault Diameter is not provided on the plans. Bidders should assume an 8’
Diameter Valve Vault Manhole in the preparation of their bids. Concrete was assumed as
the material for the Valve Vault Manhole, but HDPE can also be used if H20 Rated.
Entry Hatches are shown in the Civil Plans for the Valve Vault and the Structural Plans for the
Wet Well, but are not specified as to sizing or type. Hatches need to be H20 Rated. The hatch
shown in the plans for the wet well is a single leaf, but to get an appropriate size, a double leaf
hatch will be necessary. Bidders should use the following for the hatches on the project:
• Wet Well – Halliday Products – H2R7260. Hatch shall also include Retro-Grate.
• Valve Vault – Halliday Products – H2R6060. Include concrete slab for the hatch.
Section Specific Changes:
Section 40 61 13 – Modify Section 1.1.A by deleting item 5 in full.
Prepared by the City of Kalispell Public Works Department
Keith Haskins, PE
Deputy Public Works Director / City Engineer
Enclosure(s):
• None