Black Diamond Way

Black Diamond Way (HMI8B)

Location: Clayton, CA 94517 Contra Costa County
Buy California State flags at Flagstore.com!
Country: United States of America
Buy United States of America flags at Flagstore.com!

N 37° 56.47', W 121° 56.01'

  • 0 likes
  • 0 check ins
  • 0 favorites
  • 848 views
Inscription
In 1892 Contra Costa County named Black Diamond Way, and maintained it as a road until 1982. (Locally it was also known as "Nortonville Road".) Black Diamond Way became part of Black Diamond Mt. Diablo Regional Trail in 1985.

Black Diamond District coal mines operated from 1861 until circa 1900. Between 1867 and 1883 they produced over 100,000 tons annually. Coal was hauled to river landings by teams and rail.

Miners and families from Mt. Diablo coalfield towns crossed Mt. Diablo Creek for supplies, services, and recreation. Inns and saloons outnumbered other establishments.

The City of Clayton dedicated Black Diamond Plaza on October 28, 2000.

Clayton Historical Society 2005
Details
HM NumberHMI8B
Tags
,
Year Placed2005
Placed ByClayton Historical Society
Marker ConditionNo reports yet
Date Added Saturday, October 18th, 2014 at 12:08am PDT -07:00
Pictures
Sorry, but we don't have a picture of this historical marker yet. If you have a picture, please share it with us. It's simple to do. 1) Become a member. 2) Adopt this historical marker listing. 3) Upload the picture.
Locationbig map
UTM (WGS84 Datum)10S E 593711 N 4199823
Decimal Degrees37.94116667, -121.93350000
Degrees and Decimal MinutesN 37° 56.47', W 121° 56.01'
Degrees, Minutes and Seconds37° 56' 28.20" N, 121° 56' 0.60" W
Driving DirectionsGoogle Maps
Area Code(s)925
Closest Postal AddressAt or near 6489-6599 Marsh Creek Rd, Clayton CA 94517, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

Is this marker missing? Are the coordinates wrong? Do you have additional information that you would like to share with us? If so, check in.

Nearby Markersshow on map
Check Ins  check in   |    all

Have you seen this marker? If so, check in and tell us about it.

Comments 0 comments

Maintenance Issues
  1. Is this marker part of a series?
  2. What historical period does the marker represent?
  3. What historical place does the marker represent?
  4. What type of marker is it?
  5. What class is the marker?
  6. What style is the marker?
  7. Does the marker have a number?
  8. This marker needs at least one picture.
  9. Can this marker be seen from the road?
  10. Is the marker in the median?
© 2025  Historical Marker Project.  All Rights Reserved.
All registered trademarks are the property of their respective owners.
HMP is owned and operated by 3RiverDev (Fort Wayne, Indiana).
Terms and Conditions   |   Privacy Policy   |   Disclaimers   |   About   |   Contact Us