City of Ames, IA


Nathan Willey
515-239-5160
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Step 1 of 2 - Terms and Conditions


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City of Ames Supplemental

Specifications to SUDAS

 

Division 1: General Provisions and Covenants

Section 1010 General Conditions

1.03 Definitions and Terms

Working Day - Saturdays will not be excluded from working day counts if

the contractor is working.

Section 1080 Prosecution and Progress

1.01 Subletting or Assignment of Contract

A.4. Any and all service work shall be performed by a plumber

licensed with the City of Ames in accordance with the Ames Municipal

Plumbing Code. The contractor shall coordinate the work to be done so

that it does not impede the progress of the project as a whole.

A.5. Work by Contractor - All traffic signal service work shall be

performed with a licensed IMSA Signal Level II technician onsite.

1.10 Contractors Employees, Methods and Equipment

B.3. When working in the City of Ames shirts shall be worn. Shirts

with profanity or offensive designs are not allowed.

Section 1040 Scope of work

1.09 Changed Site Conditions

B.3 Add "Under no circumstances will payment for down time be

made by the City of Ames as project field issues are being resolved. The

City of Ames will take all necessary action to resolve issues in a timely

manner."

1.10 Disputed Claims for Extra Compensation

A.6 Add "Under no circumstances will payment for down time be

made by the City of Ames as project field issues are being resolved. The

City of Ames will take all necessary action to resolve issues in a timely

manner."

1.11 Add "Under no circumstances will payment for down time be made by

the City of Ames as project field issues are being resolved. The City of

Ames will take all necessary action to resolve issues in a timely manner."

Section 1060 Control of Materials

1.04 Storage of Material

Add "On contracts for which the contract sum is $10,000 or more,

payments may be allowed based on value of processed or fabricated

materials or rolled steel products which have been delivered on the work

or 90% of the value of processed or fabricated material, or rolled steel

products, reserved for the project and stored locally such that the

materials can be inspected, are of acceptable quality and stored in a

manner satisfactory to the Engineer.

Division 2: Earthwork

Section 2010 Clearing, Excavation, and Embankment

1.08 Measurement for Payment

F.2. Replace "existing embankments or following proof rolling

operations.", with "embankments constructed as part of the project or

once the grad has been approved following a successful proof rolling

test."

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L.1. Replace all with "The contractor will be responsible for

compaction testing and payment for testing unless otherwise specified in

the Contract Documents."

L.2 Delete all.

2.04 Subbase

D.1.c Recycled HMA will not be allowed for Special Backfill under new

PCC pavement.

3.04 Embankment Construction

C.1 Add: "No embankments shall be built on frozen earth."

3.06 Subgrade Preparation

A. Add: "A disk or plow shall be used for turning soil for drying. If

conditions do not allow enough space for a disk or plow, the material

shall be opened up for drying via other methods, proposed by the

Contractor, with the approval of the Jurisdictional Engineer. Use of a

ripper for turning soil will not be allowed."

A.4 Add "City of Ames shall approve the subgrade elevations prior

to placement of subase material."

Subgrade Stability

B.1 Delete "Perform proof rolling with a truck loaded to the maximum

single legal axle gross weight of 20,000 pounds or the maximum tandem

axle gross weight of 34,000 pounds." Add "Perform proof rolling with a

tandem axel truck loaded with a minimum net weight of 15 tons of

material." Delete "of more than 2 inches, measured from the top to the

bottom of the rut at the outside edges". Add "Tire rutting during proof

rolling will be unacceptable."

Division 3: Trench and Trenchless Construction

Section 3010 Trench Excavation and Backfill

1.08 Measurement and Payment

F.1 Replace with "The contractor will be responsible for compaction

testing and payment for testing unless otherwise specified in the

Contract Documents."

F.2 Delete all.

2.01 Materials Excavated from a Trench

C. No additional compensation will be made for minor adjustments

to elevations due to field conditions.

Division 4: Sewers and Drains

Section 4010 Sanitary Sewers

3.06 Sanitary Sewer Service Stubs

C.5 Add: Mark end point with a 14-foot 2"x4", painted green and

wrapped with metallic tape.

Section 4020 Storm Sewers

1.07 Special Requirements

Use Class R-2 Pipe Embedment from Figure 3010.102 (SW-102) for

storm sewer pipe installations.

2.01 Storm Sewers

A.3 Delete "with cold applied bituminous or rubber rope gasket

jointing materials, unless otherwise specified."

A.4 Delete "If specified."

B.3 Delete "with cold applied bituminous or rubber rope gasket

jointing materials, unless otherwise specified."

B.4 Delete "If specified"

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C.3 Delete "with cold applied bituminous or rubber rope gasket

jointing materials, unless otherwise specified."

C.4 Delete "If specified"

3.02 Pipe Installation

A.5 Delete "with non-shrink grout or"

Section 4040 Subdrain and Footing Drain Collector

Figure 4040.231 Add note: 4" subdrain is allowable for Type 1

installations.

Section 4050 Pipe Rehabilitation

1.07 B Delete "if required" Add "The City of Ames Water Meter Shop

phone number is 515-239-5151."

C Add "Contractor shall coordinate with the City of Ames Water

Meter Shop for the location of the water meter."

Section 4060 Testing

2.01 Video Inspection

B.3 Add: "Compact disc, DVD or electronic files saved to a portable

media device such as a flash drive are preferred by the City of Ames.

Standard VHS videotape is not acceptable."

Division 5: Water Mains and Appurtenances

Section 5010 Pipe and Fittings

1.08 Measurement and Payment

A.2.a Replace "casing" with "carrier"

2.07 Water Service Pipe and Appurtenances

B.3 Replace "ASTM D 1785, SDR 21, Schedule 80, Type S Joints."

with "C900 with wall thickness of DR 14"

3.01 Pipe Installation

A.8 Delete "when specified in the contract documents,"

B.1 Add: "Use P-1 Pipe Embedment from Figure 3010.104 (SW-

104) for water main pipe installations. Granular material shall not be

used for bedding or backfill material."

Section 5020 Valves, Hydrants, and Appurtenances

1.08 Measurement and Payment

C.3 Add "Anchor Tee shall be paid for as part of the Fire Hydrant

Assembly and not paid for separately"

E. Add "Valve box adjustment rings will be incidental. Tracer wire

connections, if present in existing fixture, shall be restored incidental to

any fixture adjustment."

F. Add "Tracer wire connections, if present in existing fixture, shall

be restored incidental to any fixture adjustment."

G. Add "Tracer wire connections, if present in existing fixture, shall

be restored incidental to any fixture adjustment."

2.01 Valves

D.8 Rock or cap block shall be placed behind tapping valve sleeves for

support.

2.02 Fire Hydrants

B. Allowable hydrants for new or replacement in the City of Ames:

Clow, Model: Medallion

Mueller: Super Centurion

Waterous, Model: Pacer (WB-67-250)

C.6 Features:

a. Operating nut: Pentagonal, size 1 ½ inches

b. Pumper nozzle: 4 1/2 inches in diameter

c. National standard nozzle threads: yes

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e. Nominal bury length: 6 feet

D. Public Hydrants shall be green in color # 2033 Hydrant Green,

silicone enamel, Klinger Paint Company, Cedar Rapids, Iowa

2.03 Appurtenances

A. Replace "As specified in the contract documents." with

"Hydrants are required for blowoffs."

3.04 Adjustment of Existing Valve Box or Fire Hydrant

A. Add "Tracer wire connections, if present in existing fixture, shall

be restored by placing a cut 1" below the lowest point on the valve box

lid while the lid is inside of the valve box. so not to damage the tracer

wire with the valve box lid and the valve box itself rubbing against each

other."

B. Add "Tracer wire connections, if present in existing fixture, shall

be restored by placing a cut 1" below the lowest point on the valve box

lid while the lid is inside of the valve box. so not to damage the tracer

wire with the valve box lid and the valve box itself rubbing against each

other."

C. Add "Tracer wire connections, if present in existing fixture, shall

be restored by placing a cut 1" below the lowest point on the valve box

lid while the lid is inside of the valve box. so not to damage the tracer

wire with the valve box lid and the valve box itself rubbing against each

other."

Section 5030 Testing and Disinfection

1.01 Section Includes

C. Add "Follow City of Ames testing and disinfecting procedures.

Copies can be obtained from the Public Works Department."

Division 6: Structures for Sanitary and Storm

Section 6010: Concrete (Structural)

2.02 Concrete Materials

A. Add "Unless specified, use of pre-cast structures, for storm

sewer intakes in the City of Ames will be allowed only with approval of

the Engineer. Approved structures shall comply with ASTM C 478 and

no additional compensation will be made for coring into the structure due

to minor field adjustments of inlet and outlet pipes and subdrains."

B. Add "M-4 may be used for intake bases with approval of the

Engineer."

2.03 Reinforcement

Add "All reinforcing steel shall be epoxy coated unless otherwise

indicated on the plans."

2.09 Manhole or Intake Adjustment Rings (grade rings)

A. Add "High Density Polyethylene Grade Adjustment Rings are

preferred for manhole adjusting and intake adjusting."

2.10 Castings (Ring, Cover, Grate and Extensions)

C.1 Add "Manholes castings not set in pavement shall be bolted to

the structure at all attachment hole locations in the casting. Type D, are

required for Sanitary Sewers and Storm Sewers in areas designated

floodplain by the City. Type B are required for all Sanitary Sewers and

Storm Sewers in paving. Type F are allowed for Storm Sewers outside

of paving. Concrete box outs for manholes in HMA paving shall be 4'x4'.

All manholes in paving shall be gasketed."

2.11 Additional Materials for Sanitary Sewer Manholes

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B.1 Delete "When exterior waterproofing is specified, provide

bituminous or coal tar coating." Add "Bituminous exterior waterproofing

is required on sanitary sewer manholes."

3.01 General Requirements for Installation of Manholes and Intakes

K. Delete "or external"

3. 02 Additional Requirements for Cast-In-Place Concrete Structures

A.2 Add "On intake replacement projects the Jurisdictional Engineer

may allow the exterior walls of the intake to be poured against

undisturbed earth where the vertical face is true and the wall thickness

will not exceed 8 inches in width."

Figure 6010.514 (Sheet 3 of 3)

Delete Sheet, not allowed in the City of Ames

Division 7: Streets and Related Work

Section 7010 Portland cement Concrete Pavement

1.03 Submittals

A. Replace "Class A shall be used for concrete base or temporary

pavement and recreational trails only. Class B shall be used for

temporary pavement and recreational trails only. After October 31 all

Class B concrete shall be replaced with Class A concrete" with "Class A

and B concrete shall not be used within the City of Ames unless

specified within the contract documents."

3.02 Pavement Construction

C.3 Surface Fixture Adjustment

Box-out fixtures for later adjustment are not allowed within the City of

Ames, without prior specific approval of the Jurisdictional Engineer.

3.03 Curb and Gutter Construction

A. Construct curb and gutter as per City of Ames curb standard with

30" width and heights of 7" at face and 12" at back with 1" tilt onto curb.

An ‘ED' Joint is required at each end of a radius.

C. No asphalt shall be placed against curb less than 72 hours old

unless maturity testing of the curb has been successfully completed in

accordance with IDOT IM 383 or flexural strength testing has been

successfully completed in accordance with IDOT IM 316.

3.08 Pavement Smoothness

C.1` Replace "The Engineer will check PCC pavement surfaces with

a 10 foot straightedge placed parallel to the centerline." with "The

Contractor will check PCC pavement surfaces with a 10 foot straight

edge or "bump buggy" placed parallel to the centerline, in the presence

of City Staff.

ADD 3.09 Pavement Markings

A. Materials

Materials shall meet the requirements of Iowa DOT Standard

Specification 2527.02 or as updated by the current applicable General

Supplemental Specification.

B. Construction

Placement of pavement markings shall be in accordance with Iowa DOT

Standard Specification 2527.03.1,2,3,5 and 6 or as updated by the

current applicable General Supplemental Specification.

Pavement markings placed on newly completed PCC pavements, may

be placed only when the pavement surface is dry and free from dirt, dust,

oil, curing compound, and other contaminates which may interfere with

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markings properly bonding to the surface. Ensure the clean surface is at

least 1 inch (25 mm) wider than the anticipated marking. shall have the

curing compound film horizontal surfaces in these locations. Curing

compound film need not be removed from curbs or other vertical

surfaces. Curing compound removal shall not damage the underlying

PCC pavement.

Removal of curing compound may be by vacuum blasting, shot blasting,

or high pressure water blasting. Open abrasive blasting without

containment will not be allowed. The equipment and method used shall

be recommended by the manufacturer.

Figure 7010.7A

Delete Entire Sheet. See attached curb detail at the end of this

specification.

Section 7020: Hot Mix Asphalt Pavement

1.06 Scheduling and Conflicts

Add: "HMA surface placement in subdivisions shall be delayed a

minimum of one calendar year from the final date of HMA base

placement."

Add: "HMA surface placement in subdivisions shall not take place in

the fall season after the date of October 15th."

Section 7030: Recreational Trails, Sidewalks, and Driveways

2.07 Detectable Warnings

Replace section with the following

Detectable warning panels (truncated domes) shall be the Armor Tile,

brick red, cast-in-place.

3.04 PCC Recreational Trails, Sidewalks, and Driveways

F.5 Replace "Isolation joints shall be sealed, including joints that butt

against the back of curb."

F.2.b.3 Replace with "Transverse contraction joints shall be sawed

within 12 hours of placement with a 1/8 inch blade saw."

Figure 7030.101

Driveway and curb opening widths for new pavement shall conform to

the jurisdictional requirements, requiring a total of 1" of expansion

between the back of curb and the back of sidewalk (i.e. 1" at back of

curb, none at back of sidewalk OR none at back of curb and 1" at back of

sidewalk OR ½" at back of curb and ½" at back of sidewalk OR any other

split of a summation of 1" of expansion).

Figure 7030.102

Application of this detail shall not be used in the City of Ames. Integral

driveways are not allowed without approval of the Jurisdictional

Engineer.

Figure 7030.204

All ramps to pavement connections shall be BT-3 joints. The ½ inch

expansion material is to be placed between the ramp and the landing

area.

Figure 7030.205

All ramps to pavement connections shall be BT-3 joints. The ½ inch

expansion material is to be placed around the entire landing area of the

ramp.

Figure 7030.206

All ramps to pavement connections shall be BT-3 joints. The ½ inch

expansion material is to be placed around the entire landing area of the

ramp. Delete property line reference.

Figure 7030.206

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All ramps to pavement connections shall be BT-3 joints. The ½ inch

expansion material is to be placed around the entire landing area of the

ramp.

Division 8: Traffic Signals

Section 8020: Conduit System and Concrete Bases

2.01: Handholes

D. The final handhole before entering the controller cabinet shall be a

30 inch by 48 inch by 24 inch deep heavy duty QUAZITE® style

enclosure, box identification #PG3048BA24, and shall have a Heavy

Duty 2-Piece cover with 2 Bolts set, cover identification

#PG3048HS00, or approved equivalent box and cover.

2.02: Conduit System

A. No rigid steel conduit is to be used in the City of Ames.

3.01: Handholes

A. No additional handholes are to be installed during construction

unless approved by the Jurisdictional Engineer.

Section 8030: Wiring

2.01: Cable

B. Signal Cable shall be multi-conductor copper wire, and meet the

requirements of IMSA Specification 19-1. All Signal Cable shall be

stranded 14 A.W.G. wire.

3.01: Cable

F. All splices to IMSA Specification 19-1 cable must be done using

moisture resistant Scotchlok 314 type connector or approved

equivalent.

G. All splices to communication cable shall be done using moisture

resistant Scotchlok UR2 type connectors or approved equivalent.

Section 8050: NEMA Controller and Cabinet

2.01: Controller

P. The controller shall be an EPAC NEMA controller compatible

withTS1 and TS2 operation.

2.02: Controller Cabinet and Auxiliary Equipment

K. Cabinet shall be mounted on a 24-inch aluminum riser specified by

the Jurisdictional Engineer.

Section 8070: Signal Heads, Pushbuttons and Signs

2.02: Traffic Signal Lamps

A. 135 Watt lamps shall not be used in new or retrofit signal head

installations. All signal head lamps shall be an approved 12 inch

diameter LED lamp.

B. 60 Watt lamps shall not be used in new or retrofit pedestrian head

installations. All pedestrian head lamps shall be an approved 12

inch square LED lamp.

C. N/A - Not applicable with the use of LED Lamps

D. N/A - Not applicable with the use of LED Lamps

E. N/A - Not applicable with the use of LED Lamps

F. N/A - Not applicable with the use of LED Lamps

2.03: Pedestrian Push Buttons

C. Type and Model of push button shall be specified or approved by

Jurisdictional Engineer.

Figure 8010.1

Controller Cabinet Footing: Cabinet footing shall not extend more than 2

inches above ground level.

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Figure 8010.2

Controller Cabinet Footing (Type 170 Controller): This style of cabinet

footing shall not be used in the City of Ames.

Figure 8010.5

Typical Square Loop Detector: This style of loop detector shall not be

used in the City of Ames.

Figure 8010.9

Signal Head Overhead Mounting: This style of Signal Head mounting

shall not be used in the City of Ames.

Division 9: Site Work and Landscaping

Section 9010 Seeding

1.03 Submittals

C. Add "At the pre-construction meeting, and/or prior to any

contract work commencing, submit a written watering plan detailing the

equipment to be used, the water source, and the manpower to be used

towards meeting the specified watering requirements.

1.08 Measurement for Payment

A.1.a Add "If construction limits or easement limits are not defined in

the contract documents the jurisdictional engineer shall determine the

limits of measurement for pay."

3.03 Conventional Seeding

C.2 Replace "3 inches." with "6 inches."

Section 9020 Sodding

1.03 Submittals

E. Add "At the pre-construction meeting, and/or prior to any

contract work commencing, submit a written watering plan detailing the

equipment to be used, the water source, and the manpower to be used

towards meeting the specified watering requirements."

1.08 Measurement for Payment

C. Add "If construction limits or easement limits are not defined in

the contract documents the jurisdictional engineer shall determine the

limits of measurement for pay."

3.06 Maintenance

A. Change "14 days." to "30 days."

Section 9030 Plant Material and Planting

1.04 Submittals

F. Add "At the pre-construction meeting, and/or prior to any

contract work commencing, submit a written watering plan detailing the

equipment to be used, the water source, and the manpower to be used

towards meeting the specified watering requirements."

Section 9040 Erosion and Sediment Control

2.17 Inlet Protection

A.4 Add "The below grate inlet protection shall be installed as soon

as possible after the streets are paved."

B. Delete entire section.