Chase Trunkline Rehabilitation

Agency:	City of Huntsville
State:	Alabama
Type of Government:	State & Local
Posted Date:	Apr 22, 2026
Due Date:	Apr 29, 2026
Solicitation No:	Project No. 71-26-SP07
Original Source:	Please Login to View Page
Contact information:	Please Login to View Page
Bid Documents:	Please Login to View Page

Chase Trunkline Rehabilitation Project No. 71-26-SP07

MANDATORY Pre-Bid Meeting will be held on Wednesday, April 15, 2026, at 10:00 a.m. CST and the Bid Opening has been RESCHEDULED and will be held on Wednesday, April 29, 2026, at 11:00 a.m. CST .

Both meetings will be held at City Hall, in Training Room 624, located at 305 Fountain Circle, Huntsville, AL 35801.

Attached Files

File Description	Download
Addendum No. 3	Download
Revised Quantities-Attachment A1	Download
Addendum No. 2	Download
Addendum No. 1	Download
MANDATORY Pre-Bid Meeting Attendees	Download
Drawings	Download
Technical Specifications	Download
Specifications	Download
Advertisement	Download

Bid Contacts

Name	Job Title
Chase Marshall	Project Engineer
Mary Ridgeway	Procurement & Contracts Coordinator

Attachment Preview

HUNTSVILLE

Urban Development Department

Engineering Division

CHASE TRUNKLINE REHABILITATION

Project No. 71-26-SP07

April 22, 2026

Addendum #3

NOTICE OF CHANGE TO PROSPECTIVE BIDDERS:

• Bid Opening date has been RESCHEDULED to Wednesday, April 291 2026, at

11 :00 a.m. CST.

Addenda will only be emailed to those bidders who attend and have signed in at the pre

bid meeting. All addenda. as well as other project information. are available for

downloading on Engineering's website at www.huntsvilleal.gov/engineering/bidlist.

Acknowledgement of receipt/download from website of addenda is mandatory using

Attachment "C" located in the Specifications and attachment must be submitted with bid

package. Failure to do so shall be cause for rejection of the bid. It is the responsibility of

all bidders to refer to the website for any updates. The attached pre-bid meeting minutes, all

addenda, and attachments for the above-referenced project will become part of the contract

documents .

Attachments: Attachment N - Manhole Rehabilitation Chemical Grout Applications

Attachment O - Quadex Manhole Restoration Materials Installation Specification

END OF ADDENDUM #3

The Star of Alabama

P.O. Box 308 • Huntsville, AL 35804-0308 • Phone 256-427-5300 • Fax 256-427-5325

ATTACHMENT "N"

Manhole Rehabilitation Chemical Grout Applications

Application for crack Infiltration

1 START WITH A VISIBLE CRACK

1.1 The surface of the crack may need to be cleaned off with a mechanical grinder or a wire brush.

Deposits left by effervescence can Inhibit full penetration of the grout.

2 DRIU INJEcn0N HOLES

2.1 Appropriate sized hole should be drilled at a 45• angle so that it intersects the crack at roughly

1/2 the depth of the concrete. Maximum depth required on almost any structure Is 18".

Hammers with vacuum bits are not recommended.

2.2 Cracks tend to veer off In one direction or another below the surface level. It may be necessary

to stagger Injection holes from one side of the crack to the other. This will Insure that at least

half of the holes intersect the crack.

2.3 Hole spacing depends on the width of the crack, but typically is between 6" and 10" for hairline

cracks. Holes may be spaced as far apart as 24" on wider cracks. If the concrete being sealed is

6" deep or less, holes should be drilled directly into the crack no more than 6" apart.

2.4 On large jobs a 20' test section should be injected to determine the most feasible and economic

port spacing.

3 FLUSH INJEOION HOLES

3.1 A flush wand that will reach the back of the injection holes should be used to flush out the

drilling dust. USE ONLY CLEAN WATER TO FLUSH OUT THE HOLES. It is very important to get the

holes as clean as possible; otherwise the dust will clog up the crack and inhibit penetration of

the grout.

4 INSTALL PORTS

4.1 Mechanical packers should be used In weak concrete or for deep drilling. They should be

inserted until the top of the rubber sleeve is flush with concrete. If the rubber is not flush with

the concrete it may either spall the concrete when tightened down or blow out when the

injection pressures start to rise. Use a 3/8" deep well socket to tighten the Packers.

4.2 The tips should be left off of all the Packers until you are ready to flush the crack. Bang-in ports

are an excellent choice for good concrete where deep drilling is not necessary. Simply bang

them into a 3/8" hole with a hammer.

5 FLUSH THE CRACK

5.1 Install a tip on the first packer. USE ONLY CLEAN WATER TO FLUSH THE CRACKI Injection

pressure should start at 250p.s.i. and be Increased as needed. This will clean dirt and other

contaminants out, open the crack up, and insure that enough water is present to activate the

grout. A non-staining dye may be added to the water to see where the flush water is coming out

and to help separate ground water from flush water.

5.2 Start flushing with the injector that is at the bottom of a vertical crack, or at the very end of a

crack if It is horizontal. Continue to flush with water until only contaminate free water is flowing

out of the crack or the next port. If no water is being pumped through the port, the injection

hole may not be intersecting the crack. If this is the case, drill another hole on the other side of

the crack and repeat the above steps. Be sure not to cross through the first injection hole.

Repeat this process for every port.

NOTE: The rubber in the Mechanical Packer tends to relax if left in the wall for more than eight

hours. This causes the Packer to become loose and may cause blow outs when high pressure is used

to inject the grout. To avoid this, the Packers may need to be re-tightened prior to grout injection.

5.3 In order to insure that the grout will not set up in the pump and hoses, It Is best to use two

different pumps - one for flushing and one for grout injection. If this is not possible, be sure to

thoroughly flush the pump out with Prime Flush (or Approved Equal) non-flammable solvent

before switching from water to grout.

6 INJECT THE GROUT

6.1 Always wear safety glasses, rubber gloves, and long sleeve shirt and pants when doing any type

of pressure injection. See MSDS sheet before working with any Prime-Flex products.

6.2 Remove the tips from all of the ports. Re-tighten the Mechanical Packers if necessary. Put a tip

on the first Port used to flush and begin injecting Prime-Flex (or Approved Equal). Patience Is a

must when doing crack injection. It may take several minutes to get resin flowing into the crack.

Increase pressure in l00p.s.i. increments as necessary. The lowest pressure that will get

penetration should always be used, but it may be necessary to increase the pressure as high as

2,S00p.s.l. Be very careful when turning the pressures up this high, as the concrete may shear or

the Packer can blow out of the hole. This usually results in the technician being sprayed with

grout. If grout begins to flow freely from the crack, stop injection to give the material time to

activate. The crack should seal enough to begin injection again within a few minutes. If the flow

does not stop, Prime Plug (or Approved Equal rapid setting hydraulic cement) may be necessary

to plug the leak. Clean the grout off of the crack as much as possible before applying Prime Plug

(or Approved Equal). It will set within a few minutes.

NOTE: It is useful for a small amount of grout to drip out of the crack. It allows the technician to see

how far the grout has traveled and it will seal itself up within a few minutes.

6.3 Continue to pump until material has penetrated the entire distance between the first and

second Packer. The grout will not always visibly travel the entire distance in hairline cracks. Once

the furthest point of grout travel has been obtained, move on to the next Packer and repeat the

process.

7 FLUSH THE PUMP

7.1 When finished pumping for the day, the pump should be thoroughly flushed out using Prime

Flush solvent (or Approved Equal). Material left in the pump overnight may set up and ruin the

pump.

8 REMOVE THE PORTS

8.1 Wait 24 hours before removing the ports. If it Is necessary to remove them the same day, a

small amount of water may be injected into each hole before removing. Usually a 3/8" sodcet

and wrench, vice grips, and a small screwdriver are necessary to remove the Mechanical

Packers. Bang in ports are removed with vice grips.

9 PATCH INJECTION HOLES

9.1 The injection holes should be patched with an epoxy gel (Speed Bond #1) (or Approved Equal).

10 GRIND GROUT OFF SURFACE

10.1

Use an electric grinder with a grinding disc or a wire wheel to remove the grout from the

surface. Use caution; a wire wheel can "grab" the grout and be pulled from the technician's

hands. If possible, wait 24 hours before grinding.

11 APPLY SURFACE SEAL

11.1

Apply a band of Prime Gel 2200 Flexible (or Approved Equal) to the surface of the crack

to give a more attractive look to the surface and to act as a secondary barrier.

Application for a Gusher

1. DRILL RELIEF HOLES/ INJECTION HOLES

1.1. Reduce water pressure as much as possible. Drill relief holes (also to be used as injection holes) below

or at the side of the leak. When the crack is patched the water will be diverted through the relief holes

and the pressure on the crack will be reduced. An appropriate size hole should be drilled at a 4So angle

so that it intersects the crack at roughly 1/2 the depth of the concrete. 18 inches is the maximum depth

required on almost any structure. Prime Resins recommends the use of a heavy duty rotary hammer for

drilling. Hammers with vacuum bits are not recommended.

1.2. Cracks tend to veer off In one direction or another below the surface level. For this reason It may be

necessary to stagger injection holes from one side of the crack to the other. This will insure that at least

half of your holes intersect the crack. Hole spacing depends on the width of the crack, but typically for

gushing leaks only a few holes are necessary.

2. FLUSH INJECTION HOLES

2.1. This is not necessary if water is running out of the holes. A flush wand that will reach the back of the

injection holes should be used to flush out the drilling dust. USE ONLY CLEAN WATER TO FLUSH OUT

THE HOLES. Make sure to get the holes as clean as possible to insure penetration of the grout.

3 . APPLY THE SURFACE SEAL

3.1. Apply Prime Plug (or Approved Equal, a fast setting hydraulic cement) to clean, sound concrete. If the

crack is extremely wide, the Activated Oakum Technique may be used (see Activated Oakum

Technique).

4. INSTALL PORTS

4.1. 1/2" and 5/8" Prime Packers are high pressure injection ports. Install so that the top of the rubber

sleeve is flush with concrete. If the rubber is not flush with the concrete it may either spaII the concrete

when tightened down or blow out when the injection pressures start to rise. Use a 3/8" deep well

socket to tighten the Packers. Do not beat on the Packer with a hammer. This will damage the threads

and the tip will not be able to screw on. Leave off tips of Packers until you inject.

NOTE: The rubber in the Packer tends to relax if left in the wall for more than eight hours. This causes the

Packer to become loose and may cause blow outs when high pressure is used to inject the grout. To avoid

this, the Packers may need to be re-tightened prior to grout injection.

5. INJECT THE GROUT

5.1. Please see MSDS before working with any Prime-Flex (or Approved Equal) product. Always wear safety

glasses, rubber gloves, long sleeve shirts, and pants when doing any type of pressure injection. It Is best

to use two different pumps - one for flushing and one for grout injection. If this Is not possible, be sure

to thoroughly flush the pump out with Prime Flush cleaning solvent (or Approved Equal) before

switching from water to grout.

5.2. Grout may be injected as a single component or two components. For two component injection, a two

component pump with a static mixing chamber at the end of the hoses may be used. Prime-Flex (or

Approved Equal) products can be mixed at a 1:1 or 2:1 ratio of grout to water. The mix ratio has only a

slight affect on cured properties of grout.

5.3. If, after surface sealing, you are still encountering problems with water flow, inject Prime-Flex 920 (or

Approved Equal) with a maximum dose of Prime-Kat. The Prime-Flex 920 (or Approved Equal) reacts

very fast and expands up to 2,900%. It will seal off the leak very quickly. If the crack Is expected to

move, or If the surface seal was sufficient to control the leak, a flexible material (Prime-Flex 900 XLV(or

Approved Equal)) should be injected. The 920 requires a catalyst, and should be poured into a mixing

bucket and mixed with the proper amount of Prime-Kat Clear (or Approved Equal). See technical

literature or label on pail for proper mix ratio. Do not allow any moisture to enter the pail.

5.4. In most pressure injection procedures it is necessary to leave the tips off of all the Packers that have not

had grout injected through them. They allow air and water to vent out of the crack. Failure to do this

will result in excess pressure building up in the crack and possibly cause further damage to the

structure. This is not always necessary with a gushing leak. If the leak Is bad, the pressure will vent to

the water source. Remove the tips from all of the Packers. Re-tighten the Packers if necessary. Put a tip

on the lowest Packer and begin injecting Prime-Flex. The lowest pressure that will get penetration

should always be used (250 p.s.i. minimum), but it may be necessary to increase the pressure as high as

2,500 p.s.i. Be very careful when increasing pressure. If the surface seal blows out and grout begins to

flow freely from the crack, Prime Plug (or Approved Equal) may be necessary to re-plug the leak. Clean

the grout off of the crack as much as possible before applying the Prime Plug (or Approved Equal). It

should set within a few minutes. Continue to pump until material has penetrated the entire distance

This page summarizes the opportunity, including an overview and a preview of the attached documents.

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