Canyon del Rey Watershed
An environmental summary created by the ENVS 560/L Watershed Systems class at CSUMB.
- 1 Location
- 2 Watershed Components
- 3 Canyon del Rey Watershed Joint Powers Authority
- 4 Monitoring Sites
- 5 Links
- 6 References
- 7 Disclaimer
The Canyon del Rey Watershed is located entirely in Monterey County within the Central Coast region of California. The watershed is approximately 16.8 square miles and contains portions of the cities of Monterey, Del Rey Oaks, and Seaside. The Canyon del Rey Watershed drains into Arroyo Del Rey a perennial stream that begins in the eastern portion of the Canyon del Rey watershed near Laguna Seca Race Track, and flows west terminating into the Monterey Bay.
Arroyo del Rey (Canyon del Rey Creek)
Arroyo del Rey is the main creek of the Canyon del Rey Watershed. Arroyo del Rey has also been called Canyon del Rey creek in local studies conducted for MPWMD. The name Arroyo del Rey is often used by the USGS, city of Del Rey Oaks, and past Central Coast Watershed Studies (CCoWS) projects. The creek begins in the east along Highway 68 near the Laguna Seca Race Track. It flows westerly next to Highway 68 until it reaches the Ryan Ranch Business Park in Monterey. The creek then follows Highway 218 into the city of Del Rey Oaks. Arroyo del Rey runs through recreational areas including Frog Pond Wetland Preserve and Del Rey Oaks Park, then going through the community of Seaside where it creates both Laguna Grande Lake in Laguna Grande Regional Park, and Roberts Lake . The outlet of Arroyo del Rey is located within Monterey State Beach.
Lakes and Preserves
The northern portion of the Canyon del Rey Watershed known as the South Boundary Sub-basin contains a large amount of sandy soils that offers little runoff into Arroyo del Rey. The underlying geology consists of Aromas Sandstone and Paso Robles Formation . The South Boundary Tributary is an ephemeral stream located in the northern portion of the Canyon del Rey Watershed which confluences with Arroyo del Rey near Frog Pond Wetland Preserve. Very rarely does the South Boundary Tributary contain any flow.
The southern portion of the Canyon del Rey Watershed known as the Upper Sub-basin contains an underlying geology of Monterey Shale and Santa Margarita Sand Stone. The sub-basin included portions of Ryan Ranch Business Park, Pasadera Golf Course, and Laguna Seca Race Track. The Upper Sub-basin contributes the most ammount of runoff to Arroyo del Rey. The runoff from both golf course and residential irrigation contribute and help sustain a base flow for Arroyo del Rey in the summer time ..
The western portion of the Canyon del Rey Watershed is known as the Lower Sub-basin. It contains allot of urbanization with both residential and commercial development from the cities of Del Rey Oaks, Monterey, and Seaside. The lower Sub-basin includes both Laguna Grande Regional Park and Roberts Lake
Canyon del Rey Watershed Joint Powers Authority
The Canyon del Rey Watershed Joints Power Authority (JPA) was created in 1980 
Public Agencies Involved in the Canyon del Rey Watershed JPA
Responsibilities of Agencies
- Create laws and best management strategies that help reduce the amount of surface runoff and erosion into the Canyon del Rey Watershed
- Find outside funding to lower local expenditures for improvements.
- Broker the distribution of cost for various restoration projects. 
- (Active) Arroyo del Rey near Del Rey Oaks City Hall (Managed by MPWMD)
- (Inactive) Above Frog Pond Wetland Preserve (Formerly Managed by CSUMB)
California Central Coast Gage Locations page has more information on these gages.
- (Active) Laguna Seca Gage (Recorded at Hourly Intervals) managed by CIMIS
- (Active) KCAMONTE 21 (Recorded at 15 min Intervals) managed by Weather Underground
- (Active) KCAMONTE 67 (Recorded at 15 min Intervals) managed by Weather Underground
- Roberts Lake
- Laguna Grande Regional Park
- Frog Pond Wetland Preserve
- Central Coast Watershed Studies (CCoWS)
- Monterey Peninsula Regional Park District (MPRPD)
- Canyon del Rey Master Plan Draft- 2014
- Sustainable Del Rey Oaks
- Geisler E, Smith D, Watson F. 2015. Frog Pond Wetland Preserve Enhancement and Erosion Control Plan. Central Coast Watershed Studies. WI-2014-04 
- Canyon del Rey Joint Powers Authority Agreement. 1980
This page may contain students's work completed as part of assigned coursework. It may not be accurate. It does not necessarily reflect the opinion or policy of CSUMB, its staff, or students.