Scope of Work

The DOT is requesting bids for Class “A” crushed stone Article 4120.04 or Class “C” gravels Article

4120.03 for which 75% or more of the particles retained on the 3/8 inch (9.5 mm) sieve have at least one fractured face as defined in Materials I.M. 305. Crushed gravel must meet the gradation below. All testing shall be done prior to delivery.

Rock to Road

FOR DISTRICTS 2, 3, 4, AND 5:

ROCK DELIVERED TO ROAD LOCATION AND DOT PLACES ON THE SHOULDER

The contracted supplier will be responsible for dumping material in temporary piles near the specified roadway for the DOT to pick up and place on the roadway shoulder for routes designated in the solicitation document. The rate of delivery should not exceed the amount the DOT expects to place on the shoulder within 1 day after delivery to the temporary day pile.

FOR DISTRICTS 1 & 6:

ROCK DELIVERED AND PLACED ON SHOULDER BY VENDOR

The contracted supplier will be responsible for delivery and placement at the MMs listed on the bid.

Routes will be from mile marker to mile marker. All road weight limits shall be followed. Quantities are subject to change based on bid pricing, need, and funding. Final, potentially updated, quantities will be reflected once awarded and will be noted on the bid tab.

Placement needs will vary by location; requirements may be as low as 1 ton or could exceed 8 tons per 100 ft. The DOT frequently uses a spread pattern of 3 feet wide and 2 inches thick. The pattern requested of the bidder may vary but will be determined and provided to the supplier at the time of order.

DOT personnel will prioritize road repairs not to exceed their allotted budget. Once determined, suppliers will be asked to deliver class “A” crushed stone or class “C” gravel to specific roadside locations. Suppliers will be given specific delivery instructions including but not limited to desired tonnage, date, location and dumping instructions.

Throughout the contract period DOT personnel will contact successful bidders to place material orders and provide locations within their areas of responsibilities for delivery. The supplier will have 10 working days after notification to make deliveries and placement of rock.

DOT will provide all necessary traffic control except where noted on the lines for Coralville garage in District 6.

Line P6.3 has restricted working hours - Night Work Only in this stretch of the Coralville area.

Special requirements listed below.

Restricted working hours – Night Work requirements.

• Lane closures will be permitted nightly, starting at 8:00 p.m. on Monday and ending at 6:00 a.m.

on Friday.

• Lane closures outside of these hours will not be permitted.

• Traffic control devices shall not be placed in the traveled way before 9:00 p.m. Sunday or 8:00 p.m. Monday through Thursday.

• Traffic control devices shall be removed from the traveled way before 6:00 a.m. each morning.

• See lane closure guidance map, attached.

Suppliers will be required to deliver product to the designated location as specified by DOT personnel.

Acceptable types of trucks will be determined between DOT and supplier. This material will not be stockpiled but will be spread or dumped according to DOT’s instructions at each location as needed.

At routes designated in the contract documents the supplier will be responsible for placing the material on the shoulder by use of a shouldering machine furnished and operated by the supplier without dumping on the pavement. Supplier’s equipment must be capable of spreading the granular shoulder materials in a uniform layer of the desired thickness and width in an evenly loose condition. Locate the wheels of the spreader so they do not operate on the 1-foot (0.3 m) width of pavement adjacent to the edge of the shoulder. Once spread, compact the aggregate using a pneumatic tired roller or a steel vibratory roller with a minimum of four complete coverages of the entire surface, then followed with a minimum of one complete finish coverage using a steel-tired roller.

Materials may be ordered on an "as needed" basis after frost thaws as coordinated with contracted service provider. Order quantities and delivery instructions will be provided by location ordering product.

DO NOT ATTEMPT TO DELIVER ESTIMATED QUANTITY PRIOR TO CONTACT FROM DOT

GARAGE.

Contracted suppliers must provide contact name and phone number for ordering locations awarded.

Purchase orders will not be issued for products ordered under this proposal. Field offices will process invoices for payment. Invoices are to be emailed to locations requesting product.

Delivery Requirements The material shall be delivered to the Iowa DOT destination(s) between 7:30 a.m. – 3:30 p.m. on normal working days Monday through Friday, unless outlined differently above, with a notification of delivery phone call 24 hours prior to delivery.

Delivery Period Delivery period of each order shall be within ten working days after order has been placed. If within 20 days the product is not available, the Iowa DOT has the right to purchase the material from another source.