County Quarry Products, LLC
County Asphalt
5501 Imhoff Drive, Martinez, CA 94553
- Caltrans approved
- Hot mix (HMA)
- Checked Sep 30, 2026
Before you haul
What to settle with the plant before trucks leave the yard.
- Outside sales
- Confirm with plant
- Current hours
- M-F 7:00 AM-5:00 PM; Sat 7:30 AM-3:00 PM, confirm asphalt productionLoadout hours — confirm today’s
- Account
- Confirm with plantAsk what a first order needs
- Mix availability
- Call plantName the mix and tonnage
- Production schedule
- Call plantChanges day to day
- Minimum order
- Confirm with plant
- Payment methods
- Cash or check only, Account
- Saturday
- In posted hours
- Truck access
- See site and truck accessAccess notes on file
Plant notes
County Asphalt shares the Imhoff Drive materials complex with County Quarry Products. The site manufactures asphalt, sand, drain rock and recycled base materials and accepts asphalt and concrete for recycling. Public scales are available with certified weight certificates. Confirm asphalt mix, quantity and production schedule before dispatching trucks. General materials phone: (925) 682-0707
Production schedules, mix inventory and loadout conditions change day to day. Confirm the mix designation, tonnage and loadout time with the plant before you dispatch trucks.
Plant details
Plant
- Operator
- County Quarry Products, LLC
- Plant type
- Fixed · hot mix asphalt
- County
- Contra Costa County
- Caltrans
- On the Caltrans approved-plant list
- Address
- 5501 Imhoff Drive, Martinez, CA 94553
- GPS coordinates
- 38.00153, -122.06711
- Website
- countyquarryproducts.com
- Plant page
- The operator’s page for this plant
- Details checked
- September 30, 2026
Ordering and sales
- Plant phone
- (925) 682-2299
- Sales department
- On the plant line
- Outside sales
- Outside sales unconfirmed
Ask for your mix by name, the day’s loading hours, the minimum load, and what a first-time account needs.
Operations
- Plant hours
- Monday-Friday: 7:00 AM-5:00 PM Saturday: 7:30 AM-3:00 PM Sunday: Closed
- Loadout hours
- M-F 7:00 AM-5:00 PM; Sat 7:30 AM-3:00 PM, confirm asphalt production
- Seasonal schedule
- Standard yard hours are Monday-Friday 7:00 AM-5:00 PM and Saturday 7:30 AM-3:00 PM. Asphalt production may vary with project demand and scheduled runs, so contractors should call ahead to confirm mix availability and loadout timing.
Mixes and products
- HMA · listed
- RHMA · not listed, ask
- Warm mix · not listed, ask
- RAP · listed
- DOT spec · listed
- Specialty · listed
- Aggregates · listed
Hot mix asphalt (HMA)
- Hot Mix Asphalt (HMA)
- Asphalt Concrete
Recycled asphalt (RAP) mixes
- Recycled Asphalt
- Recycled Concrete
Agency and DOT specification mixes
- Caltrans Specification HMA
Specialty and custom mixes
- Open-Graded Friction Course (OGFC)
- 1/2" OGFC
- Custom Asphalt Mixes
Aggregates
- Drain Rock
- Sand
- Class II Aggregate Base
- Recycled Base Rock
The operator’s own list, sorted into families by The Pavement Directory. Mix designs and production schedules change: confirm the exact mix designation and tonnage availability with the plant before dispatching trucks.
Price per ton
No price on file for County Asphalt yet. Plant prices move with the liquid asphalt index and the quantity, so call for today's price — and if you have bought here recently, you can add what you paid below.
Report a price you paid
Site and truck access
Satellite view
- Gate address
- 5501 Imhoff Drive, Martinez, CA 94553
- GPS
- 38.00153, -122.06711
Truck access notes
Active asphalt, quarry and recycling yard with frequent heavy-truck traffic. Public scales are available onsite. Follow posted traffic routes and check-in procedures, and call the asphalt line before arrival to confirm mix availability and production timing.
Nearby asphalt plants
4 other plants within a 30 min drive of County Asphalt, by road with typical traffic.
Route to 1. Antioch Building Materials Company — 16 min (12 mi) by road, typical traffic.
| Map number# | Plant | Drive | Road miles | Outside sales |
|---|---|---|---|---|
| 1 | Antioch Building Materials CompanyAntioch Building Materials Inc · Pittsburg, CA12 mi by road · Outside sales: UnconfirmedDirections from County Asphalt to Antioch Building Materials Company | 16 min | 12 mi | Unconfirmed |
| 2 | Vallejo AsphaltVulcan Materials · Vallejo, CA15 mi by road · Outside sales: YesDirections from County Asphalt to Vallejo Asphalt | 19 min | 15 mi | Yes |
| 3 | Berkeley AsphaltMartin Marietta · Berkeley, CA25 mi by road · Outside sales: YesDirections from County Asphalt to Berkeley Asphalt | 28 min | 25 mi | Yes |
| 4 | Dutra Materials/San Rafael RocRichmond, CA · permit record, not yet reviewed27 mi by road · Outside sales: UnconfirmedDirections from County Asphalt to Dutra Materials/San Rafael Roc | 30 min | 27 mi | Unconfirmed |
Drive time and miles by road from Google, with typical traffic for the route. Rush hour, a plant queue and a loaded truck all add time, so allow for them before you commit trucks.
Plant intelligence
About County Asphalt
County Asphalt operates a hot mix asphalt batch plant in Martinez, California, serving paving and construction contractors throughout Contra Costa County and the East Bay. The facility manufactures asphalt and also supplies sand, drain rock and recycled base materials. Caltrans records identify the site as an HMA batch plant, and the property includes public truck scales and recycling operations.
Areas served: Martinez · Concord · Pleasant Hill · Pacheco · Walnut Creek · Benicia · Pittsburg · Antioch · Richmond · Contra Costa County · Central East Bay · Northern East Bay
Plan the haul
- Asphalt tonnage calculatorTons to order before you call.
- Trucking calculatorCycle times and trucks for this haul.
- Asphalt plants near MartinezEvery plant within a haul of your site.
- Buying direct from a plantSmall loads, millings and price per ton.
Who lays the mix
Need the work done rather than the mix? Compare paving and pavement maintenance contractors serving the area.
County Asphalt: common questions
How do I order asphalt from County Asphalt?
Call the sales department at (925) 682-2299. Payment: Cash or check only and Account. Have the mix, tonnage and pickup date ready, and ask what a first-time account needs.
What are County Asphalt's hours?
Monday-Friday: 7:00 AM-5:00 PM Saturday: 7:30 AM-3:00 PM Sunday: Closed. Loadout: M-F 7:00 AM-5:00 PM; Sat 7:30 AM-3:00 PM, confirm asphalt production. Standard yard hours are Monday-Friday 7:00 AM-5:00 PM and Saturday 7:30 AM-3:00 PM. Asphalt production may vary with project demand and scheduled runs, so contractors should call ahead to confirm mix availability and loadout timing.
What asphalt mixes does County Asphalt make?
County Asphalt lists Hot Mix Asphalt (HMA), Asphalt Concrete, Open-Graded Friction Course (OGFC), 1/2" OGFC, Caltrans Specification HMA, Custom Asphalt Mixes, Drain Rock, Sand, Class II Aggregate Base, Recycled Asphalt, Recycled Concrete and Recycled Base Rock. What runs on a given day depends on the plant's schedule, so confirm your mix when you order.
What areas does County Asphalt serve?
County Asphalt serves Martinez, Concord, Pleasant Hill, Pacheco, Walnut Creek, Benicia, Pittsburg, Antioch, Richmond, Contra Costa County, Central East Bay and Northern East Bay. Haul time still decides whether it can supply a given job, so measure from the site before you order.
Is County Asphalt Caltrans-approved?
It was on the Caltrans approved-plant list when this record was last checked, on September 30, 2026. Approvals lapse and renew, and a public job still needs its own mix design approved, so confirm both before you bid.
Where is County Asphalt?
5501 Imhoff Drive, Martinez, CA 94553, in Contra Costa County.
What other asphalt plants are near Martinez?
The closest by road in this directory are Antioch Building Materials Company in Pittsburg (16 min (12 mi) by road), Vallejo Asphalt in Vallejo (19 min (15 mi) by road) and Berkeley Asphalt in Berkeley (28 min (25 mi) by road), driving from County Asphalt with typical traffic. Call ahead before you switch plants — the nearest one only helps if it will load your trucks.
Who operates County Asphalt?
County Quarry Products, LLC operates County Asphalt.
Verified sources and corrections
Details checked September 30, 2026
Someone at The Pavement Directory checked this plant’s phone, hours and outside-sales policy against the operator on that date. It is not an endorsement of the plant or its mix.
Sources on this record
- Operator’s page for this plant — countyquarryproducts.com
- Operator website — countyquarryproducts.com
- Caltrans approved-plant list — Plant listed
- EPA facility registry — Federal facility record
Record last updated September 30, 2026.
Plant profile
58% complete
11 of 19 buyer details on file.
Missing
- Outside-sales policy
- Account requirements
- Minimum order
- Saturday production
- Max RAP percentage
- Small loads
- Takes old asphalt
- Millings for sale
Run this plant, or found a detail that has changed? Tell us and we will check it against the operator. Include this page’s address in your message.
Confirm before you haul: Hours, mix availability, sales policy and DOT approvals change, sometimes week to week. Call the plant before you schedule trucks. The Pavement Directory is an independent directory and is not affiliated with County Quarry Products, LLC.