ITB_2641_Addendum_1.pdf

City of Oviedo, Florida

ITB 26-41: Windy Pine Drainage Improvements Addendum No. 1

September 24, 2026

To Prospective Bidders and Others Concerned:

This Addendum is in response to questions from interested bidders and forms a part of the ITB documents dated September 13, 2026, for the above referenced ITB. Please note, questions are recorded as they are received, including grammar and spelling errors.

Receipt of this addendum must be acknowledged on page 22 of the original ITB packet. Failure to do so will subject the Bidder to disqualification.

QUESTIONS AND ANSWERS:

1. Question: What is the engineer's estimate?

Response: The engineer’s estimate is $64,500.

2. Question: I have some questions regarding the articulating concrete block revetment system. The pay item note says it’s to include a geotextile fabric and a geogrid. Are there specifications for the geotextile and geogrid required? If so, what type of cable is required?

Response: Attached are the detail sheets for the geogrid and geotextile fabric. They are both included with the system. The Geotextile fabric meets FDOT Type D2.

3. Question: Plan sheets 4 & 6 say the mats are to be hand placed. The details on sheet 7 show cables. Is the contractor to hand place individual blocks and then cable them into mats in the field? If so, what type of cable is required?

Response: For this specific project, the articulated concrete blocks are intended to be hand-placed and field-cabled during installation. The cable will be a ¼” Poly cable. It is included.

4. Question: How are we to lay reinforcement mat with the tree’s to remain?

There is also no tree protection for those tree’s that are to remain.

Response: Please install the reinforcement mat in accordance with the Armormax Planting Details in the attached document.

5. Question: There is a 300 SF quantity difference on items 7 & 10.

Response: See Revised Bid Form Attached.

A. Item 7: Articulating Concrete Block Revetment System – 924 SF B. Item 10: Plastic Erosion Mat (Turf Reinforcement Mat, Type E-4) – 1,850 SF

ATTACHMENTS:

1. Geogrid And Geotextile Fabric Detail Sheets

2. Armormax Planting Details

3. Revised Bid Form

All other areas of ITB 26-41 remain unchanged.

END OF ADDENDUM NO. 1

Updated as of July 2020

Disclaimer: This Product Data Sheet is the sole and exclusive property of Armortec LLC (“Armortec”). The Product Data Sheet shall not be reproduced, disseminated, or otherwise used in any way, except in connection with the purchase of Armortec Products (including, but not limited to the ArmorGrid product line), without the express written consent of Armortec. Armortec assumes no liability for the accuracy or completeness of this information or for the ultimate use by the purchaser. Armortec disclaims any and all express, implied, or statutory standards, warranties or guarantees, including without limitation any implied warranty as to merchantability or fitness for a particular purpose or arising from a course of dealing or usage of trade as to any equipment, materials, or information furnished herewith. This document should not be construed as engineering advice.

Materials

Polymer - - PET

Coating - - PVC (Green or Black)

Tensile Properties Symbol Test Method

MD-Ultimate Strength T

ULT

ASTM D 6637

(lbs/ft) /(kN/m)

1,680 /24.52

MD-Creep Limited Strength T L

ASTM D 5262

(lbs/ft) /(kN/m)

1,076 /15.70

Reduction Factors Symbol Test Method ArmorGrid

Creep Reduction Factor RF

CR

ASTM D 5262 1.51

Durability Reduction Factor RF D

ASTM D 2455 1.10

Installation Damage Reduction Factor (Soil Type 3)

RF

ID

ASTM D 2455 1.05

Design Strength Properties Symbol Test Method ArmorGrid

Long Term Design Strength LTDS NCMA 97 (lbs/ft) / (kN/m) 963 /14.05

Physical Properties Test Method Units ArmorGrid

Water Flow Rate ASTM D 4491 gpm/ft 2 850

UV Stability ASTM D 4355 %/hrs 75/500

Aperture - in /mm .24x.24/6 x 6

Weight - lbs /kg 91.5/41.5

Length - ft /m 150 ’ / 45.72

Width - ft /m 12’ /3.66

Area - yd /m

2 200 /167

Armortec ArmorGridTM Product Data Armortec soil reinforcement geogrids are proudly made in the USA and are composed of high molecular weight, high tenacity multifilament polyester yarns and coated with PVC. They are inert to biological degradation and are resistant to naturally encountered chemicals, alkalis, and acids.

9025 Centre Pointe Drive, Suite 400 West Chester, OH 45069

Phone: (513) 645-7000

Fax: (513) 645-7993

ArmorGrid

Dan Priest Stamp

Armortec® Handplaced Installation Guide

ENGINEERED SOLUTIONS

Site Preparation Stable and compacted subgrade soil shall be prepared to the lines, grades and cross sections shown on the contract drawings.

Transitions between slopes, termination trenches, benches, embankment crests shall be compacted, shaped and uniformly graded to ensure intimate contact between the ACB system and the underlying subgrade section.

Recommendations

• Subgrade compaction – 90% Standard Proctor density (ASTM

D 698)

• Unsuitable subgrade material removed

soils and compacted

• Geotextile Application/Sizing – AASHTO M-288 for Permanent

Erosion Control

Geotextile Placement Prior to placing geotextile and ACB system, the prepared subgrade should be inspected by the Engineer or representative. Placed directly on the prepared surface, the geotextile is to be free of folds or wrinkles. Geotextile must be placed so upstream strips overlap downstream strips and so upslope strips overlap downslope strips; overlaps are to be in the direction of flow wherever possible. All longitudinal and transverse joints shall be overlapped at least three feet for below-water installations and at least one and a half feet for dry installations. There should be no voids or “bridging” between geotextile and subgrade. The geotextile is to extend beyond the top, toe and side termination points of the ACB system, as detailed by the manufacturer or as directed by the Engineer.

If necessary, a graduated filter layer may be used in lieu of a geotextile, as specified by the Engineer.

ACB Placement (ArmorFlex® & ArmorLoc®) After the geotextile is placed or the filter is constructed, the area is ready for the placement of revetment units.

When installing on a channel side slope or steepened bed slope, standard installation procedure is to begin at the bottom of grade and work up the slope. Standard terminations at the top, toe and perimeter of the protected area is required. A two (2) unit embedment is standard, however additional units may be utilized depending on specific project scour estimation.

ArmorFlex and ArmorLoc ACBs are configured in two distinct interlocking patterns: (1) a staggered bond interlocking matrix as seen in Figure 1, and (2) a nested bond interlocking matrix as seen in Figure 2. Both staggered and nested bond shall be installed as shown in referenced figures, minimizing gaps/voids between units.

Armortec® Handplaced Installation Guide The purpose of the Armortec Handplaced Installation Guide is to provide recommendations for the proper installation of Handplaced Articulating Concrete Block (ACB) revetment systems.

While this guide offers a set of instructions for performing those operations that are critical for the proper functioning of ACB revetment systems, final preparation and installation is the responsibility of the end user. Additional information is contained in ASTM D6884 Standard Practice for Installation of Articulating Concrete Block (ACB) Revetment Systems.

It is the Contractor’s responsibility to maintain safe work practices consistent with OSHA (Occupational Safety and Health Administration) regulations and other prevailing safe work practices. This guide is intended to be used in conjunction with all applicable safety regulations and safe work practices and is in no way a replacement thereof.

Figure 1 – ArmorFlex Staggered Bond

Figure 2 – ArmorLoc Nested Bond

Terminations – Top/Toe and Lateral/Flank Trenches The extents of all ACB protection areas must have the proper termination to ensure the overall integrity of the system. Whether transitioning from natural ground or adjacent structures to ACBs, these zones require treatment.

Where the ACB system transitions to natural ground, extend the termination into the subgrade at a depth determined by the Engineer of Record. Currently, the industry standard recommendation is a minimum of two (2) units embedded at a downward 45-degree angle and backfilled with a non-erosive material. Concrete material is generally recommended, however the material can be dependent on the termination location (top, toe or flanks), freeboard elevation and its exposure to erosion conditions. Discussion with the block manufacturer and project design representative is recommended when determining final material for project installation.

As seen in Figure 3, constructing the termination trench can be accomplished by preparing a rounded excavation or a defined angle break in the subgrade. The trench configurations are dependent on site conditions and product to be installed (staggered or nested bond products) with the main focus of construction being required depth “D” in the field and backfilled with approved non-erosive backfill.

Where the ACB system transitions to a hard structure point, such as a bridge abutment, pier, etc., terminations must be accomplished by placing ACB units as close as possible to the hard point and backfilling with approved material; see Figure 4 for example. Any void adjacent to structure greater than 2” requires backfill.

Radius/Alignment Transitions In armoring areas where a channel alignment change or radius occurs, the orientation of the blocks will change, resulting in gaps larger than 2". These areas should be filled with concrete grout, or other material as specified by the engineer. See Figure 5 for example.

Finishing/Backfilling As directed by the engineer, stone or soil backfill is placed within the voids of the ACB units after block installation has been completed. Typical backfill material is an angular gravel with no fines and no component larger than 1.5” equivalent diameter, or native soil; other material may be used at the discretion of the engineer. See Figure 6 for example.

Figure 3 – Rounded and Angled Terminations

Figure 4 – Hard Point Terminations

Figure 5 – Radius/Alignment Transition

Figure 6 – Native soils are typically used for backfill

Material Delivery – Palletized Quantities & Geosynthetics Included below in Table 1 are the anticipated pallet quantities and weights for the ACB units. The ACB material will be palletized and wrapped on standard 4’ wooden pallets to be unloaded with 4,000 lb. capacity equipment with forks. Standard material handling techniques are assumed upon delivery of material to the project site.

Geosynthetic materials are shipped to the project site in full rolls and delivered prior to or in conjunction with the palletized ACB material.

Damaged Units Conduct a visual Inspection of ACB material.

All units should be sound and free of defects that would interfere with either the proper placement of the unit or impair the performance of the system. Surface cracks incidental to the usual methods of manufacture or surface chipping resulting from customary methods of handling in shipment and delivery shall not be deemed grounds for rejection.

a. Cracks exceeding 0.25 inches (0.635 cm) in width and/ or 1.0 inch (2.54 cm) in depth shall be deemed grounds for rejection.

b. Chipping resulting in a weight loss exceeding 10% of the average weight of a concrete unit shall be deemed grounds for rejection.

Damaged ACB Unit - Cracked or split through the block.

• Method 1: Remove existing damaged unit(s), re-grade and replace geotextile per project specification, replace with new unit(s).

• Method 2: Remove existing damaged unit(s), re-grade and replace geotextile per project specification, grout solid with 4,000 psi grout or concrete. Ensure filled void is adequately consolidated (vibration of material) as well as finishing the in-filled area to the top, but not above, the surrounding ACB units(s).

Bulged ACB Unit - Bulging or dislodged block/Unacceptable Projection Height

• Method 1: Remove existing dislodged unit(s), re-grade and replace geotextile per project specification, and re-install previously dislodged unit(s).

• Method 2: Remove existing damaged unit(s), re-grade and replace geotextile per project specification, grout solid with 4,000 psi grout or concrete. Ensure filled void is adequately consolidated (vibration of material) as well as finishing the in-filled area to the top, but not above, the surrounding ACB unit(s).

ACB Class SF/Pallet Weight/Pallet Pallets/Truck ArmorFlex 4.75" S-Block 66 2,570 18 ArmorFlex 6" S-Block 56 3,050 15 ArmorFlex 4.75" M-Block 81 3,450 13 ArmorFlex 6" M-Block 70 3,750 12 ArmorFlex 8.5" M-Block 50 2,990 15 ArmorLoc 4" Block 72 2,570 17 ArmorLoc 6" Block 60 3,050 16 Table 1 - Palletized Quantities

ENGINEERED SOLUTIONS

©2022 Contech Engineered Solutions, a QUIKRETE Company handplaced_install PDF 3/22

Contech Engineered Solutions LLC provides site solutions for the civil engineering industry. Contech’s portfolio includes bridges, drainage, sanitary sewer, stormwater and earth stabilization products.

NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION.

CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION.

For information on other Contech offerings, visit www.ContechES.com or call 800.338.1122

©2021 Willacoochee Industial Fabrics Inc.

are trademarks of Willacoochee Industrial Fabrics, Inc.WINFAB &® ®

Disclaimer: WINFAB assumes no liability for the completeness or accuracy of this information or the ultimate use of this information. WINFAB disclaims any and all implied, expressed, or statutory standards, guarantees, or warranties. This includes without limitation any implied warranty as to merchantability or fitness for a particular purpose or arising from a course of dealing or usage of trade as to equipment, materials, or information furnished herewith. This document should not be construed as engineering advice.

Always consult the project engineer for project specific requirements. The end user assumes sole responsibility for the use of this information and product. The property values listed above are subject to change without notice.

WINFAB | www.winfabusa.com 1 Nashville Mills Rd. Nashville GA 31639 Ph: (912) 534-5757 • Fax: (912) 534-5533

WINFAB® 2199 geotextile fabric is manufactured using high tenacity polypropylene yarns that are woven to form a dimensionally stable network, which allows the yarns to maintain their relative position.

WINFAB® 2199 geotextile fabric resists ultraviolet deterioration, rotting, and biological degradation and is inert to commonly encountered soil chemicals.

PROPERTY TEST METHOD MARV ENGLISH MARV METRIC

Tensile Strength (Grab) ASTM D4632 370 x 250 lbs 1,645.8 x 1,112.1 N

Elongation (Grab) ASTM D4632 15% x 15% 15% x 15%

Trapezoidal Tear Strength ASTM D4533 100 x 100 lbs 445 x 445 N

CBR Puncture ASTM D6241 950 lbs 4,228 N

UV Resistance (500 hrs) ASTM D4355 90% 90%

Apparent Opening Size* ASTM D4751 70 US Std. Sieve 0.212 mm

Percent Open Area (POA) COE-02215 4% 4%

Permittivity ASTM D4491 .28 sec-1 .28 sec-1

Permeability ASTM D4491 .01 cm/sec .01 cm/sec

Water Flow Rate ASTM D4491 18 gpm/ft2 733 lpm/m2

*Maximum Average Roll Value

PROPERTY TEST METHOD TYPICAL ENGLISH TYPICAL METRIC

Roll Dimensions Measured 6 ft x 300 ft 12 ft x 300 ft

1.83 m x 91.5 m

3.65 m x 91.5 m

Roll Area Measured 200 yd2

400 yd2

167 m2

334 m2

PRODUCT DATA SHEET

WINFAB 2199®

REINFORCING

SUCCESS

Notes:

1. Cut "X" opening approximately the anticipated full-grown diameter of the plants/trees.

2. After placing the plants/trees, compact the soil and secure the ARMORMAX 75 flaps down with pins placed on approximately 3 - 4 inch (75 - 100 mm) centers followed by additional pins on each free edge.

3. Minimum spacing on the outside diameter of planting cuts shall be 5 ft (1.5 m) Typical.

INITIAL "X" CUT

ARMORMAX® 75

ARMORMAX PLANTING DETAIL

ANCHOR

PIN

3" OVERLAP MIN

(75 mm)

ANCHOR

PIN

FLOW OF WATER OR

DIRECTION OF PREVAILING WIND

PINNING DETAIL NEAR EXISTING TREE (MIDDLE OF ROLL)

PINS ON 12" (300 mm) CENTERS

ON ROLL EDGE OVERLAPS

BETWEEN ANCHORS

ARMORMAX® 75

EXISTING TREE

PINS AROUND

EXISTING TREE

ON 6" (150 mm) MAX

CENTERS

TOP OF SLOPE / UP STREAM

BOTTOM OF SLOPE /

DOWN STREAM

Notes:

1. Install material along the slope to the existing tree.

2. Make a horizontal cut across the width of the roll, leaving enough material to stretch beyond the tree for end of roll overlap.

3. Cut opening in the middle of the material, approximately the size of the existing tree.

4. Continue installing material along slope after shingling and following typical end of roll overlap connection shown below.

5. Pin spacing around the existing tree shall be spaced on 6" (150 mm) maximum centers.

1' MAX

(300 mm)

HORIZONTAL SPACING

PER ANCHOR/PIN SCHEDULE

ARMORMAX® 75

NOTE: ARMORMAX® 75 SHOULD BE SHINGLED IN

THE DIRECTION OF THE DOWN SLOPE AND FLOW

6" MIN

(150 mm)

ANCHOR

PIN

TOP OF SLOPE / UP STREAM

BOTTOM OF SLOPE / DOWN STREAM

OVERLAPPING END

FLOW OF WATER OR

DIRECTION OF

PREVAILING WIND

ROLL EDGE

EXISTING TREE

Notes:

1. Install material along the slope to the existing tree.

2. Make a horizontal cut across the width of the roll, leaving enough material to stretch beyond the tree for end of roll overlap.

3. Cut opening in the middle of the material, approximately the size of the existing tree.

4. Continue installing material along slope after shingling and following typical end of roll overlap connection shown below.

5. Pin spacing around the existing tree shall be spaced on 6" (150 mm) maximum centers.

PINNING DETAIL NEAR EXISTING TREE (MIDDLE OF ROLL/ END OF ROLL)

PINS AROUND

EXISTING TREE

ON 6" (150 mm) MAX

CENTERS

DATE:

NTS© 2023 Solmax 12/14/2023

NOTE: THE STANDARD DETAILS ILLUSTRATED IN THESE

DRAWINGS ARE FOR INFORMATION AND EVALUATION

PURPOSES ONLY AND ARE NOT FOR CONSTRUCTION.

PROJECT SPECIFIC CALCULATIONS, SHOP DRAWINGS AND

SPECIFICATIONS, SIGNED AND SEALED BY A REGISTERED

LICENSED ENGINEER, ARE REQUIRED FOR CONSTRUCTION.

CONCEPTUAL INSTALLATION DETAILS

ARMORMAX® PLANTING DETAILS

1 1

SHEET OFSCALE:

BID FORM **THIS FORM MUST BE COMPLETED AND RETURNED WITH YOUR BID.

00300-4

BID NO. 26-41

WINDY PINE DRAINAGE IMPROVEMENTS

REVISED BID FORM

BID

ITEM

PAY ITEM DESCRIPTION UNITS QUANTITY UNIT PRICE TOTAL

1 0101-1 MOBILIZATION LS 1 $ $

2 0102-1 MAINTENANCE OF TRAFFIC LS 1 $ $

3 104-10-3 SEDIMENT BARRIER (SILT FENCE) LF 512 $ $

4 104-12 STAKED TURBIDITY BARRIER LF 16 $ $

5 110-1-1 CLEARING AND GRUBBING LS 1 $ $

6 120-6 EMBANKMENT CY 44 $ $

7 530-4-4 ARTICULATING CONCRETE BLOCK REVETMENT SYSTEM SF 924 $ $

8 530-74 BEDDING STONE (#57 STONE) CY 15 $ $

9 570-1-2 PERFORMANCE TURF (SOD) SY 238 $ $

10 571-1-1 PLASTIC EROSION MATS (TURF REINFORCMENT MAT, TYPE E-4) SF 1,850 $ $

11 900-1 4,000 PSI CONCRETE CY 7 $ $

12 900-2 DEWATERING LS 1 $ $

13 900-3 BYPASS SYSTEM (STORMWATER) LS 1 $ $

14 900-4 AS-BUILT LS 1 $ $

TOTAL BID AMOUNT: $

Total Bid Amount In Words:

**Notes:

Determination of actual items and quantities is the sole responsibility of the Contractor.

IF CONTRACTOR BELIEVES THERE IS A DISCREPANCY ON THE QUANTITIES SHOWN ABOVE, PLEASE SUBMIT A QUESTION TO THE PROCUREMENT MANAGER SO THE DISCREPANCY CAN BE EVALUATED AND THE BID FORM MODIFIED PROPERLY. NOT ALL ITEMS ARE LISTED ABOVE. PLEASE REVIEW PLANS FOR ALL WORK

ITEMS.

The Contractor is to furnish all materials, equipment, tools, and labor which are reasonably and properly inferable and necessary for the proper completion of the Work, whether specifically indicated in the Contract Documents or not. In addition, Contractor is to provide determined quantities for all bid items. Please note, this is a lump sum contract. The City reserves the right to reject any and all proposals, to waive informalities, and to accept all or any part of any proposal as they deem to be in the best interest of the City.

ITB 26-41 Addendum 1 Attachment 3

Jacqueta Scott Highlight