1969-1970 Ponding at Shea Parkside

The EIR uses rainfall data from OC PFRD Station 170 in Los Alamitos. Ponding sequences for the entire property have been highlighted in light blue.

“1/31/70: City area: The East Garden Grove - Wintersburg Channel has been constructed since the 1959 photo, with its alignment bisecting the original agricultural fields (still visible below the channel). The western portion of the site below the knoll is flooded, and the fields appear fallow, with a network of minor flow lines and depressions evident. The remnant marshland area is almost entirely within Orange County. A narrow area, approximately 25' x 250', between a farm road and the levee (which as cultivated in the 1959 photo) now exhibits patchy vegetation which may be pickleweed, although the areas has been permanently isolated from the larger marshlands of Bolsa Chica by the flood control channel. The Kenilworth tract and a portion of the off-site knoll top are now developed.

County area: The 5 acre county parcel shows little evidence of activity or use. Most of the road system which formerly passed through the site was eliminated by construction of the East Garden Grove - Wintersburg Channel.”

Day	Jul	Aug	Sep	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Day
1									0.54				1
2						0.02			0.33				2
3													3
4													4
5									0.74				5
6													6
7					1.58								7
8													8
9						0.04							9
10					0.03		0.86	0.16					10
11								0.77					11
12							0.41						12
13													13
14													14
15													15
16					0.03		0.11						16
17							0.63						17
18													18
19													19
20													20
21													21
22													22
23													23
24							0.02						24
25													25
26													26
27													27
28													28
29													29
30													30
31													31
Day	Jul	Aug	Sep	Oct	Nov	Dec	Jan	Feb	Mar	Apr	May	Jun	Day
	N/A	N/A	N/A	0.00	1.64	0.06	2.03	0.93	1.61	0.00	0.00	N/A

1969-1970 Ponding at Shea Parkside

Summary

OC PFRD Rainfall Data - Station 170, Los Alamitos

City Parcel Western Boundary and "Ephemeral Channel"

Initial Rainfall = January 10, 1970
Aerial Photo = January 31, 1970
Consecutive Days of Ponding = 22+

1969-1970 Ponding at Shea Parkside

Summary

OC PFRD Rainfall Data - Station 170, Los Alamitos

City Parcel Western Boundary and "Ephemeral Channel"

Initial Rainfall = January 10, 1970 Aerial Photo = January 31, 1970 Consecutive Days of Ponding = 22+

Initial Rainfall = January 10, 1970
Aerial Photo = January 31, 1970
Consecutive Days of Ponding = 22+