1 Olsson Associates 2111 South 67 th Street, Suite 200 Omaha, NE 68106 DATE: October 11, 2017 ADDENDUM NO.: 1 PROJECT NAME: 84 TH STREET REDEVELOPMENT AREA CITY CENTRE INFRASTRUCTURE PAVEMENT & SEWERS CD-17-008 CITY OF LA VISTA, NEBRASKA TO ALL WHO HAVE RECEIVED PLANS AND SPECIFICATIONS FOR THE REFERENCED PROJECT. 1. Refer to the Specifications – PROPOSAL & BID FORM – BASIS OF BID, PagesP1-P8; The Bid Form has been revised per this Addendum, which is hereby attached. Project Quantities have been updated. • Added bid item 38A: “CONSTRUCT 48” BLACK VINYL CHAIN LINK FENCE” – 418 LF • Changed bid item 19: “EXCAVATION – ON SITE” from 19234 CY to 19263 CY • Changed bid item 68: “CONSTRUCT 96” ID STORM MANHOLE” from 142.7 VF to 143.9 VF • Changed bid item 74: “CONSTRUCT REINFORCED CURB INLET – TYPE III” from 1 EA to 2 EA • Changed bid item 76: “CONSTRUCT CURB INLET – TYPE III” from 3 EA to 2 EA • Changed bid item 117: “INSTALL EROSION CHECK (WATTLE)” from 3097 LF to 2953 LF 2. Refer to the Special Provisions and Technical Specifications; the following sections have been modified and are hereby attached to this addendum: • Page SP-5 – Section 2 – Progress of Work: Added Lot 1 carwash to list of properties that access must be maintained at all times. • Page TS-33 – Section 130 – Detectable Warning Panels: Added note that color of panel shall be selected by Engineer. • Page TS-70 – Section 137 – Colored, Imprinted Concrete Surfacing: Added information on stamped pattern to be used. Proline Rotating Ashlar Blue Stone and Roman Slate. • Page TS-83 thru TS-87 – Section 141 – Chain Link Fence and Gates: Added new specification for chain link fence for use on the project.
44
Embed
Olsson Associates Street, Suite 200 Omaha, NE 68106 … Addendum #1 Letter... · 1 Olsson Associates 2111 South 67th Street, Suite 200 Omaha, NE 68106 DATE: October 11, 2017 ADDENDUM
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
1
Olsson Associates
2111 South 67th Street, Suite 200
Omaha, NE 68106
DATE: October 11, 2017
ADDENDUM NO.: 1
PROJECT NAME: 84TH STREET REDEVELOPMENT AREA
CITY CENTRE INFRASTRUCTURE
PAVEMENT & SEWERS
CD-17-008
CITY OF LA VISTA, NEBRASKA
TO ALL WHO HAVE RECEIVED PLANS AND SPECIFICATIONS FOR THE REFERENCED
PROJECT.
1. Refer to the Specifications – PROPOSAL & BID FORM – BASIS OF BID, PagesP1-P8;
The Bid Form has been revised per this Addendum, which is hereby attached. Project Quantities
have been updated.
• Added bid item 38A: “CONSTRUCT 48” BLACK VINYL CHAIN LINK FENCE” –
418 LF
• Changed bid item 19: “EXCAVATION – ON SITE” from 19234 CY to 19263 CY
• Changed bid item 68: “CONSTRUCT 96” ID STORM MANHOLE” from 142.7 VF to
143.9 VF
• Changed bid item 74: “CONSTRUCT REINFORCED CURB INLET – TYPE III” from
1 EA to 2 EA
• Changed bid item 76: “CONSTRUCT CURB INLET – TYPE III” from 3 EA to 2 EA
• Changed bid item 117: “INSTALL EROSION CHECK (WATTLE)” from 3097 LF to
2953 LF
2. Refer to the Special Provisions and Technical Specifications; the following sections have been
modified and are hereby attached to this addendum:
• Page SP-5 – Section 2 – Progress of Work: Added Lot 1 carwash to list of properties that
access must be maintained at all times.
• Page TS-33 – Section 130 – Detectable Warning Panels: Added note that color of panel
2111 South 67th Street,Suite 200Omaha, NE 68106TEL 402.341.1116FAX 402.341.5895
CD-17-008
STANDARD CROSSWALK DETAIL LAYOUT
STANDARD CROSSWALK DETAIL SECTION
118
DETAILS
CITY OF LA VISTAPUBLIC WORKS DEPARTMENT R
2111 South 67th Street,Suite 200Omaha, NE 68106TEL 402.341.1116FAX 402.341.5895
CD-17-008DETAILS
122
CITY OF LA VISTAPUBLIC WORKS DEPARTMENT R
2111 South 67th Street,
Suite 200
Omaha, NE 68106
TEL 402.341.1116
FAX 402.341.5895
CD-17-008LOT 14 & LOT 17 GRADING PLAN
LOT 14
LOT 17
OUTLOT C
125
CITY OF LA VISTAPUBLIC WORKS DEPARTMENT R
2111 South 67th Street,
Suite 200
Omaha, NE 68106
TEL 402.341.1116
FAX 402.341.5895
CD-17-008LOT 14 & LOT 17 CUT/FILL PLAN
LOT 17
OUTLOT C
LOT 14
Cut/Fill Summary
Name
OA_VOL-LOT17
OA_VOL-LOT14
Totals
Cut Factor
1.00
1.00
Fill Factor
1.25
1.25
2d Area
23302.74 Sq. Ft.
8347.87 Sq. Ft.
31650.62 Sq. Ft.
Cut
4257.27 Cu. Yd.
32.81 Cu. Yd.
4290.08 Cu. Yd.
Fill
0.14 Cu. Yd.
1127.78 Cu. Yd.
1127.92 Cu. Yd.
Net
4257.13 Cu. Yd.<Cut>
1094.97 Cu. Yd.<Fill>
3162.16 Cu. Yd.<Cut>
126
84th Street Redevelopment Area
City Centre Infrastructure
Pavement and Sewers
SP-5
SPECIAL PROVISIONS
1. CRITICAL PATH METHOD (CPM) SCHEDULE
See Section 8.03, Prosecution of the Work, in the City of Omaha Specifications for Public Works
Construction, 2014 or Later Edition including all Addenda.
Delete all references to an Activities Schedule Chart (ASC).
The Contractor’s CPM schedule shall include the activities of all utility companies having facilities
on the project.
The Contractor shall submit a revised CPM schedule whenever the Contractor’s progress falls behind
his/her schedule. The Contractor shall submit the revised schedule within seven (7) days of falling
behind his/her schedule.
2. PROGRESSION OF WORK
The Contractor is made aware of the Migratory Bird Treaty Act. The Contractor should schedule
clearing and grubbing outside of the primary nesting season, generally occurring between April 1st
and July 15th, to the extent practicable. Should it appear that clearing and grubbing will result in
unavoidable conflict with a nesting bird’s eggs or young, the Contractor will be required to complete
a nesting survey. This may require the Contractor to restructure their activities to avoid an area,
thereby allowing fledging of the nest.
The Contractor shall coordinate with the adjacent businesses and property owners impacted by
roadway or driveway closures to clearly identify routes for ingress and egress to the properties as
required throughout all phases of the project. The Contractor shall notify all adjacent property owners
in writing a minimum of forty-eight (48) hours in advance of any changes in access, parking, or use
of their property that may be required to complete the work throughout the duration of the project. A
copy of the written notice shall be provided to the Engineer for approval prior to property notification.
The Contractor shall place signs along the roadways a minimum of five (5) calendar days in advance
of the start of work that would close or shift traffic along the public roadways (subsidiary to
Barricades and Warning Signs).
The Contractor shall maintain access at all times to the McDonald’s, Chili’s, Lot 1 carwash, and First
National Bank within the project boundaries. The Contractor shall also maintain access to the private
development lot contractors and private utilities contractors.
See the “UTILITIES” section of these special provisions for a description and anticipated schedule
for completion of the utility work on the project.
84th Street Redevelopment Area
City Centre Infrastructure
Pavement and Sewers
TS-33
PART 3 EXECUTION
A. Method of Measurement and Basis of Payment
1. Measurement and payment shall be made at the contract unit price per LF for the item “Security
Fence”. Payment shall be full compensation to install, adjust, and remove the security fence, and for all materials, equipment, tools, labor, and incidentals necessary to complete the work.
130. DETECTABLE WARNING PANELS
PART 1 GENERAL
A. Description
1. This item shall consist of all work necessary for installing detectable warning panels at sidewalk
curb ramps, and shall be in accordance with Section 504 of the Standard Specifications, and be installed per manufacture’s recommendations.
PART 2 PRODUCTS
1. The detectable warning panels shall be from the Armor-Tile product line, manufactured by Armor-
Tile. A sample product shall be provided for approval prior to installation. Color shall be selected by Engineer.
PART 3 EXECUTION
A. Method of Measurement and Basis of Payment
1. Measurement and payment for the Detectable Warning Panels shall be made at the contract unit
price bid per Each. Said payment shall be full compensation for all labor, equipment, materials and incidentals required to complete the work.
131. CONSTRUCT SEGMENTAL RETAINING WALL - SMALL
BLOCK
PART 1: GENERAL
1.01 Description
A. This item shall consist of all work necessary for furnishing and installing segmental retaining wall
(SRW) units to the lines and grades shown on the plans and as specified herein, and shall be in
accordance with Section 605 of the Standard Specifications, and per manufacture’s
recommendations. Also included is furnishing and installing appurtenant materials required for
construction of the complete system.
1.02 Submittals
A. Submit for review 2 sets of shop drawings for the retaining wall system prepared by a Professional
Engineer registered in the state where the project is located. The shop drawings shall indicate the
layout, height, and geogrid reinforcement (if any) of the retaining wall system. Design shall
84th Street Redevelopment Area
City Centre Infrastructure
Pavement and Sewers
TS-70
G. Curing Materials (for colored and/or stamped concrete pavement):
1. As recommended by chemical stain manufacturer for compatibility.
H. Related Materials:
1. Expansion- and Isolation-Joint-Filler Strips: ASTM D 1751, asphalt-saturated cellulosic fiber.
2.3 CONCRETE MIXES AND MIXING
A. Concrete Mixes: See Project Specifications.
B. Ready-Mixed Concrete: See Project Specifications.
2.4 ACCESSORIES
A. Comply with ASTM C309 and be approved by color additive manufacturer for use with colored
concrete. Provide W-1000 Clear Cure & Seal Color and/or Seal II tinted to match colored concrete
and manufactured by Davis Colors.
B. Pattern-Stamping Tools and Materials:
1. Tools: Mat-type and Cookie cutter-type stamping tools; Pattern shall be Proline Rotating
Ashlar Blue Stone and Roman Slate (see plans for specific locations)
a. Plastic Film: 2 mil polyethylene sheet.
b. Release Agent: Provide release agent recommended by pattern tool manufacturer and
compatible with integral color additives. Release agent shall be selected from
manufacturer's standard colors.
c. Surface Retarders to meet manufacturer's specifications.
d. Sealants: Joint sealers shall be type specified in Section 137. Provide in color to match
colored concrete.
2.5 MIXES
A. Color Additives: Mix in accordance with manufacturer's instructions. Mix until color additives are
uniformly dispersed throughout mixture and disintegrating bags, if used, have disintegrated.
B. Do not retemper mix by adding water in field.
2.6 CONCRETE COLORS
A. Concrete Colors for crosswalk borders see plans:
1. Cement: Color shall be GRAY.
2. Sand: Color shall be locally available natural sand.
3. Aggregate: Concrete supplier's standard aggregate to comply with the city of Omaha Standard
specifications.
4. Color Additives: as directed by manufacturer's percent dosage rate of Davis Colors color
additives. Dosage rate shall be based on weight of Portland cement, fly ash, silica fume, lime
and other cementitious materials but not aggregate or sand.
84th Street Redevelopment Area City Centre Infrastructure
Pavement and Sewers
TS-83
142. CHAIN LINK FENCES AND GATES
PART 1 - GENERAL
1.1 SUMMARY
A. All work shall meet the material requirements and construction methods of Section 808 – Fence of the City of Omaha Standard Specifications for Public Works Construction, 2014.
B. Section Includes: 1. Chain link fences and gates associated with sitework.
1.2 REFERENCES
A. American Society for Testing and Materials (ASTM) 1. ASTM F668 – Specifications for Polymer-Coated Chain-Link Fence Fabric. 2. ASTM F934 – Specification for Standard Colors for Polymer-Coated Chain Link 3. ASTM C 94 - Ready-Mixed Concrete.
B. Chain Link Fence Manufacturers Institute (CLFMI) latest edition Product Manual.
1.3 SUBMITTALS
A. Product material details.
1.4 QUALITY ASSURANCE
A. Chain link fabric, posts, and components, and installation shall conform to the requirements of the CLFMI Product Manual unless otherwise shown or specified.
B. Manufacturer Qualifications: Company specializing in manufacturing the products specified in this Section with minimum 3 years documented experience.
PART 2 - PRODUCTS
2.1 MATERIALS
A. All fence system components shall be polymer coated fused and bonded to the material, of black color per the associated ASTM specifications.
B. Steel Posts: Type I or II or roll formed "C" Section steel conforming to CLFMI and as specified hereinafter. Polymer coated framework shall have a PVC coating fused and adhered to the exterior zinc coating of the post or rail. PVC coating shall have minimum thickness 10-mils (0.254 mm) per ASTM F1043. Color to match fabric black per ASTM F934
C. Fabric: Polymer Coated Steel Fabric: ASTM F668, Class 2B fused and bonded, black in conformance with ASTM F934, No. 9 gage (0.148 nominal) galvanized steel wire in 2 inch mesh; ASTM A 392, knuckle top and bottom selvages, height as shown. Furnish 1-piece fabric widths.
84th Street Redevelopment Area City Centre Infrastructure
Pavement and Sewers
TS-84
D. End, Corner, and Pull Posts: Minimum sizes and weights as follows: 1. Up to 13 Foot Fabric Height: Type I or II in accordance with CLFMI Product Manual. 2. 13 foot and over Fabric Height (If required):
a. Type I Posts: Round; 4.0 inch outside diameter pipe, 9.10 lbs/lin ft. b. Type II Posts: 4.0 inch outside diameter pipe, 6.56 lbs/lin ft.
E. Line (Intermediate) Posts: Minimum sizes and weights as follows: 1. Up to 8 Foot Fabric Height: Type I, II, or "C" Section in accordance with CLFMI Product
Manual. 2. Over 8 Foot Fabric Height:
a. Type I Posts: 1) Round: 2.875 inch outside diameter pipe, 5.79 lbs/lin ft. 2) Square: 2.5" x 2.5" outside dimension, 5.10 lbs/lin ft.
b. Type II Posts: 2.875 inch outside diameter pipe, 4.64 lbs/lin ft.
F. Gate Posts: Type I or II in accordance with CLFMI Product Manual.
G. Top, Bottom, and Intermediate Rails: Type I or II in accordance with CLFMI Product Manual. 1. Manufacturer's longest lengths. 2. Couplings: Expansion type, approximately 6 inches long. 3. Attaching Devices: Means of attaching top rail securely to each gate, corner, pull, and end
post.
H. Sleeves: Galvanized steel pipe not less than 6-inches long with inside diameter not less than ½ inch greater than outside diameter of pipe. Provide steel plate closure welded to bottom of sleeve of width and length not less than 1 inch greater than outside diameter of sleeve.
I. Tension Wire: 7 gage galvanized steel conforming to CLFMI, Marcelled, located at bottom of fabric. Match coating class and color to that of the chain link fabric.
J. Polymer Coated Color Fittings: In compliance with ASTM F626. Polymer coating minimum thickness 0.006 in. (0.152 mm) fused and adhered to zinc coated fittings. Match color to fence system.
K. Wire Ties: Class 1 galvanized steel, no less than 9 gage.
L. Post Brace Assembly: Manufacturer's standard adjustable brace at end of gate posts and at both sides of corner and pull posts, with horizontal brace located at mid-height of fabric. Use same material as top rail for brace, and truss to line posts with 0.375-inch diameter rod and adjustable tightener.
M. Post Tops: Galvanized steel, weather tight closure cap for each tubular post. Furnish caps with openings to permit passage of top rail.
N. Stretcher Bars: Galvanized steel, 1 piece lengths equal to full height of fabric, with minimum cross-section of 3/16-inch x 3/4-inch. Provide one stretch bar for each gate and end post, and two for each corner and pull post.
84th Street Redevelopment Area City Centre Infrastructure
Q. Ready Mix Concrete: ASTM C94, mix design as follows: 1. Design mix to produce normal weight concrete consisting of Portland cement, aggregate,
water-reducing admixture, air-entraining admixture, and water to produce following: a. Compressive Strength: 3,500 psi, minimum at 28 days, unless otherwise indicated on
Construction Drawings. b. Slump Range: 1 to 3 inches at time of placement. c. Air Entrainment: 5 to 8 percent.
R. Swinging Gate Hardware: 1. Hinges: Size and material to suit gate size, non-lift-off type, offset to permit full 180-degree
gate opening. Provide a pair of 1 1/2-inch hinges for each leaf over 6'-0" nominal height. 2. Latch: Forked type or plunger-bar type to permit operation from either side of gate, with
padlock eye as integral part of latch.
S. Double Gates Hardware: Provide gate stops for double gates, consisting of mushroom type of flush plate with anchors set in concrete, to engage center drop rod or plunger bar. Include locking device and padlock eye as integral part of latch, using 1 padlock for locking both gate leaves.
T. Sliding Gate Hardware: Provide manufacturer's standard heavy-duty track, ball-bearing hanger sheaves, overhead framing and supports, guides, stays, bracing, and accessories as required.
2.2 GATE FABRICATION
A. Fabricate swing gate perimeter frames of 1.90-inch OD pipe, galvanized steel. Provide horizontal and vertical members to ensure proper gate operation and attachment of fabric, hardware, and accessories. Space frame members maximum of 8'-0" apart.
B. Assemble gate frames by welding or special fittings and rivets, for rigid connections. Install same fabric as for fence with stretcher bars at vertical edges. Install diagonal cross-bracing on gates as required ensuring rigid frame without sag or twist. Bars may be used at top and bottom edges. Attach stretchers to gate frame at 15 inches o.c. maximum.
C. Attach hardware to provide security against removal or breakage.
2.3 FINISH
A. Fabric, Framing, and Other Iron Parts: Black vinyl coated in accordance with CLFMI Product Manual.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Install chain link fence in accordance with CLFMI Product Manual unless otherwise specified herein.
84th Street Redevelopment Area City Centre Infrastructure
Pavement and Sewers
TS-86
B. Comply with recommended procedures and instructions of fencing manufacturer. Provide secure, aligned installation with line posts spaced at 10'-0" o.c. maximum.
C. Methods for Setting Posts: 1. Grade-Set Posts:
a. Drill or hand excavate to a depth approximately 3 inches lower than post bottom. Set post bottom not less than 36 inches below finish grade.
b. Excavate each post hole to 12 inch diameter, or not less than four times diameter of post.
c. Place concrete around posts and vibrate or tamp for consolidation. Check each post for vertical and top alignment, and hold in position during placement and finishing operations. Extend concrete footing 2-inches above grade and trowel crown to shed water.
d. Post shall be set plumb within 1/4" in 10 feet. 2. Sleeve Set Posts: Anchor posts by means of pipe sleeves preset and anchored into concrete.
After posts have been inserted into sleeves, fill annular space between post and sleeve solid with nonshrink, non-metallic grout, mixed and placed to comply with grout manufacturer's directions.
D. Top Rails: Run rail continuously, bending to form radius for curved runs. Provide expansion couplings as recommended by manufacturer.
E. Center Rails: Provide center rails where indicated. Install in 1 piece between posts and flush with post on fabric side, using special offset fittings where necessary.
F. Brace Assemblies: Install braces so posts are plumb when diagonal rod are under proper tension.
G. Tension Wire: Install tension wires through post cap loops before stretching fabric and tie to each post cap with not less than 6 gauge galvanized wire. Fasten fabric to tension wire using 11 gauge galvanized steel hog rings spaced 24-inches o.c.
H. Fabric: Leave approximately 2 inches between finish grade and bottom selvage. Pull fabric taut and tie to posts, rails, and tension wires. Install fabric on security side of fence, and anchor to framework so that fabric remains in tension after pulling force is released.
I. Stretcher Bars: Secure at end, corner, pull, and gate posts by threading through or clamping to fabric at 4 inches o.c. and secure to posts with metal bands spaced at 15 inches o.c.
J. Tie Wires: 1. Use U-shaped wire, conforming to diameter of pipe to which attached, clasping pipe and
fabric firmly when ends twisted at least 2 full turns. Bend ends of wire to minimize hazard to persons or clothing.
2. Tie fabric to line posts with wire ties spaced 12 inches o.c. Tie fabric to rails and braces with wire ties spaced 24 inches o.c. Tie fabric to tension wires with hog rings spaced 24-inches o.c.
3. Manufacturer's standard procedure will be accepted if of equal strength and durability.
K. Fasteners: Install nuts for tension bands and hardware bolts on side of fence opposite fabric side. Peen ends of bolts or score threads to prevent removal of nuts.
84th Street Redevelopment Area City Centre Infrastructure
Pavement and Sewers
TS-87
L. Gates: Install gates plumb, level, and secure for full opening without interference. Install ground-set items in concrete for anchorage. Adjust hardware for smooth operation and lubrication.
3.2 ADDITIONAL INSTALLATION PROVISIONS
A. Use U-shape tie wires, conforming to the diameters of pipe, that clasp the pipe and fabric firmly with ends twisted at least 2 full turns.
B. Bend ends of exposed wires to minimize hazards to persons or clothing.
C. Install nuts for fasteners on tension bands and hardware bolts on the side of the fence opposite the fabric. The ends of bolts, once secure and checked for smooth operation, shall be peened to prevent removal of nuts.
D. Repair coatings damaged in the field with methods and techniques as recommended by the manufacturer.
3.3 MEASUREMENT AND PAYMENT
A. Method of Measurement and Basis of Payment 1. Measurement and payment shall be made at the contract unit price per Linear Feet for the
item “Construct Black Vinyl Chain Link Fence". Payment shall be full compensation site preparation, excavation, backfilling, furnishing and installing all footings, materials, fittings, fence fabric, and posts; installing electrical grounding wire and rods, and for all materials, equipment, tools, labor, and incidentals necessary to complete the work.