Tuolumne County SR-108 Drainage Work to Slow Drivers Near Bonanza Drive November 9–10

SONORA / TUOLUMNE COUNTY — November 7, 2026. Caltrans is advising travelers to expect intermittent one-way traffic controls on State Route 108 between Bonanza Drive and Sierra Road on Monday and Tuesday, November 9–10.

Working hours and possible delays

The state transportation agency has scheduled drainage work between 8:30 a.m. and 4 p.m. each day. It anticipates potential delays of five to ten minutes and recommends alternate routes where practical. Flaggers or temporary traffic signals may control the alternating flow; drivers should follow work-zone instructions rather than try to pass a stopped queue.

Why work is necessary

Drainage systems help remove water from roadways and limit deterioration of pavement and shoulders. Even modest maintenance can require crews and equipment to occupy part of a narrow highway. Planning work before major winter precipitation can help reduce later disruptions.

Another project is continuing downtown

The same November 6 Caltrans bulletin notes a longer-lasting lane shift on State Route 49 in Sonora between Green Street and the Downtown Plaza, currently planned through December 7. That SR-49 work concerns a separate culvert project previously reported by California58, and should not be confused with the new SR-108 drainage notice.

Check the latest conditions

The posted schedule can change because of weather, equipment problems or traffic incidents. Drivers should use Caltrans QuickMap for current conditions before setting out. The notice does not mean the full highway is closed throughout November 9–10.

Primary source: Caltrans District 10, November 6 traffic advisory.

YOUR LOCAL NEWSPAPER NEEDS YOU

Help this community newspaper grow

Your support helps build coverage for the people and places this local newspaper serves.

Donate once by card ↗

Help Sonora News grow Help strengthen reporting on Sonora: community voices, important decisions and local life.

Support Sonora News

Choose how to support Sonora News:

Credit / Debit Card via Stripe

Choose an amount from $1. One-time support through the publisher's LINKERNO Stripe account.

Continue with PayPal Continue with Zelle

Zelle payments go to Vitaly Ataev Troshin. Please verify the recipient in your bank before sending. Availability depends on your bank.

Optional reader support. When possible, add “Sonora News” to the payment note. Contributions are not advertised as tax-deductible. Support does not influence editorial decisions.

Optional support through the publisher. Contributions are not advertised as tax-deductible and never buy editorial influence.

Sonora News — Your Community Newspaper

Have a correction, news tip, local announcement, or story to submit? Contact our editorial team. All submissions are reviewed before publication.