Service
Trenching & Plowing
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About the service
Riddco provides efficient trenching and plowing services for underground cable, conduit, and infrastructure installation. Our experienced crews and specialized equipment allow us to handle projects of all sizes, from small runs to large-scale infrastructure builds across Central Washington.
What sets our trenching apart:
- Cable and conduit installation
- Efficient large-scale trenching
- Experienced operators
- Versatile equipment for varied terrain
Common applications
- Long-run fiber optic cable installations across open ground
- Conduit installation for power distribution and service laterals
- Irrigation and communication line placement across agricultural and municipal sites
- Rural utility runs where directional drilling is unnecessary or less cost-effective
- Direct-bury cable installations for fiber and telecom backhaul
How trenching and plowing works
Trenching uses ride-on or walk-behind trenchers to cut a precise channel for cable or conduit, followed by placement and backfill. Cable plowing pulls product directly into the ground with minimal surface disturbance, ideal for long runs across open terrain. Riddco selects the right method based on terrain, soil conditions, and product type.
Equipment and specifications
- Ride-on trenchers for large-scale infrastructure runs
- Cable plows for efficient long-distance direct-bury installations
- Versatile equipment configured for varied terrain across Central Washington
- Experienced operators who match method to site conditions
Powering the work
Our Equipment
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2009 Hitachi 200 Excavator
2009 Hitachi 200 excavator used by Riddco for trenching projects across Central Washington. Handles larger-scale trenching, excavation, and site prep work on fiber, telecom, and power infrastructure builds.
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2012 Case 580K Backhoe/Loader
2012 Case 580K backhoe/loader used by Riddco for trenching, excavation, and site work across Central Washington. Versatile machine for utility installs, backfill, and material handling on telecom and power projects.
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2016 Yanmar Excavator
2016 Yanmar mini-excavator used by Riddco for trenching projects across Central Washington. Compact machine for tight-access trenching, utility installs, and site prep on fiber, telecom, and power infrastructure jobs.
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2022 Yanmar VIO35 Excavator
2022 Yanmar VIO35 mini-excavator used by Riddco for trenching projects across Central Washington. Zero-tail-swing design for tight-access trenching, utility installs, and site prep on fiber, telecom, and power infrastructure jobs.
Other Services
Underground utility work, start to finish.
Ready when you are
Ready to Put Riddco on Your Project?
40+ years of underground utility work across Yakima Valley, Tri-Cities, Kittitas, and Walla Walla. Call to talk through drilling, vac work, or emergency response.
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FAQs
Frequently Asked Questions
Have a different question?
Call us directly. Darcy will pick up and answer.

Call us : 509-575-0489
What services does Riddco offer?
Riddco offers four core services across Central Washington: directional drilling with rock drilling capability, hydro excavation using two Vactor trucks, trenching and plowing for long-run cable and conduit, and aerial civil support for overhead power and telecom infrastructure. All four serve telecom, power, and civil projects across the region.
What areas does Riddco serve?
Riddco serves Yakima Valley, Tri-Cities, Kittitas Valley, and Walla Walla Valley across Central Washington. We also travel to communities throughout the broader region for active partner contracts.
Does Riddco take residential work?
No. Riddco is a commercial civil infrastructure contractor. Our crews and equipment are dedicated to telecom, power, municipal, and utility projects. For residential drilling, excavation, or home utility work, please contact a local residential contractor.
Does Riddco offer emergency response?
Yes. Riddco provides 24/7 emergency vacuum excavation and utility response for active commercial partners across Central Washington.
How long has Riddco been in business?
Riddco was founded by Gary L. Riddle in 1984. The company relocated to Yakima in 1989 and has been owned by Brett and Darcy Armstrong since 2009. We have served Central Washington's underground utility needs for over 40 years.
Who are Riddco's major partners?
Riddco works with Charter Spectrum under unit contract, plus Pacific Power, Benton REA, Columbia REA, Fatbeam, and Zero DB Communications, among other commercial telecom and power partners across Central Washington.
Does Riddco perform electrical or telecom connections?
No. Riddco is a civil contractor. Our directional drilling and Vactor truck work prepares sites for telecom and power infrastructure, but we do not make final electrical or telecom connections.
How do I get a quote from Riddco?
Call 509-575-0489 to talk to our team about your project. You can also email darcy@riddco.com. We typically return calls within one business day.
Is Riddco licensed, bonded, and insured?
Yes. Riddco maintains active licensing, bonding, and insurance required for commercial civil construction in Washington State.

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