Middle Fork Irrigation District


Middle Fork Irrigation District

Middle Fork Irrigation District

Middle Fork Irrigation District boundaries are the Middle Fork of the Hood River on the west and the East Fork of the Hood

River on the east and north. On the south the watershed for the District extends onto the northern slopes of Mt. Hood and

includes Eliot, Langille and Coe Glaciers. The small town of Parkdale, is located near the center of MFID irrigated lands.

Locally the area is described as being in the Upper Hood River Valley.

Hydroelectric power is generated at three locations year around as an integral part of the Middle Fork

Irrigation District water distribution system. Within each powerhouse are water turbine generators, control

panels and the required hydraulic control and station service equipment. The three powerhouses, allowing

for differences in turbine configuration and site requirements, are similar in design and construction. Pelton

water turbines are used in powerhouses one and three, where water is returned to the stream at

atmospheric pressure. The Francis turbine in powerhouse two is a totally enclosed pipeline system, where

the operating head is determined by downstream conditions. Financing for the hydroelectric project totaled

7.5 million dollars.

Clear Branch Dam

Laurance Lake Reservoir

The dam is an earth and rock zone fill

approximately 1350 feet long with a top width

of 28 feet. Height of the dam is 106 feet and

water depth at the spillway crest elevation is

100 feet. Construction was under the

authority of the Watershed Protection and

Flood Prevention Act (Public Law 566).

When full the spillway elevation is

2978 feet msl. The surface of

Laurance lake is approximately 130


Minimum flow regimes below Clear Branch Dam are:

3 cfs for the period starting July 10 and extending through October 7 of each year.

50% of calculated reservoir inflow up to 20 cfs from October 8 through July 10.

These flows can be reduced at the discretion of the fishery management agencies if t would be in the

interest of fisheries resources to do so in so far as such reduction does not interfere with the primary

function of the reservoir.

Old Coe Diversion

The Coe Branch Diversion is located

approximately 0.8 miles upstream of the

confluence with Middle Fork of Hood River,

being within the SE ¼ NE ¼ Section 27 T 1

S. R 9 E. Original construction was

completed in December 1987. The Coe

Creek Diversion was upgraded in the fall of

2009. The dam and drop inlet grate

structure was removed and replaced with a

25 ft long angled concrete water entry wall,

fish bypass channel and drop pools. An

agency approved 50 foot FCA horizontal flat

plate dual stage screen was installed. This

resulted in the addition of 3 miles of

upstream habitat for fish and met water

quality standard objectives and restoration

priorities in the Hood River Basin.

New Coe Creek Diversion

Old Eliot Diversion

Construction on the Eliot Branch Diversion was started September 13,

1965 and was completed December 10, 1965. Due to glacial

outbursts/debris torrent events the facilities have been

replaced/repaired four times. The Eliot Diversion is located on Eliot

Branch (Creek) approximately 1 mile upstream from the Middle Fork

Hood River, five miles southwest of Parkdale, OR in SW 1/4 NE 1/4

Section 26, Township 1 South, Range 9 East of the Willamette


In November 2006, a debris flow completely destroyed the Eliot diversion and

the Eliot branch moved approx 1,000 feet to the East..

The Diversion facilities were rebuilt with a

side channel inlet and criteria fish screen

in the spring of 2007. From the diversion

facilities water enters the Eliot ditch. The

ditch provides conveyance of water from

the point of diversion to the sediment

basin. At the Sediment Basin waters from

Clear Branch Dam, Coe Creek diversion

and Eliot Diversion can be mixed and

distributed into the system

New Eliot Creek Diversion

Penstock Damage

Coe Damage

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