Tualatin Project Engineering Data


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Tualitin Project - Main Page

Facilities in Operation

Storage Dams	1
Pumping Plants	2
Regulating Tanks	2
Laterals (piped)	88 mi

Storage Facilities

Scoggins Dam

Carriage Facilities

Primary Discharge Lines

Type:	Steel pipe
Location	From Patton Valley Pumping Plant to adjacent regulating tanks
Diameter	30 in
Length	40 ft
Capacity	32.9 cfs
	Prestressed concrete cylinder pipe from Spring Hill Pumping Plant to regulating tanks:
Diameter	60 in
Length	2,472 ft
Capacity	148.2 cfs

Pumping Plants

Designation	Number of units	Total capacity, cfs	Total dynamic head, ft	Total horsepower
Patton Valley
Units No. 1-3	3	26.04	80	375
Unit No. 4	1	5.78	80	75
Unit No. 5	1	2.88	80	40
Spring Hill
City of Hillsboro - M & I
Unit No. 1	1	8.24	66	75
Units No. 2-3	2	24.00	85	250
USBR - Irrigation
Units No. 5-8	4	25.20	377	1,400
Units No. 9-13	5	123.00	377	7,700

Distribution System (Laterals)

Patton Valley: Buried gravity-fed pipe system ranging in size from 30- to 10-in diameter, 3.5 miles total length. 6,000 ft of 30-in pipe is reinforced plastic mortar. Remainder of system is asbestos-cement pipe ranging from 21- to 10-in diameter.

Spring Hill: Buried pressure-fed pipe system ranging in size from 54- to 6-in diameter, 84.5 miles total length. Asbestos-cement pipe used on 66.8 miles, and reinforced concrete pipe on 17.7 miles.