(2) Canyon below Harper ;- 



At the upper end of the Vale valley the river extends for 11 miles 

 through a canyon about l/U mile wide. The river has an average width of 

 5h feet and a moderate gradient throughout this section. 



More than half of the stream bed is composed of medium and small rubble, 

 together with a large amount of silt. There are numerous shallow riffle 

 areas, but the entire section is so heavily silted that it was consider- 

 ed of little possible value to salmon Water temperatures are also un- 

 suitable for salmon during the sunnier, being 71oO°F, at the time of ob- 

 servation. There is an adequate number of resting pools, but the sparse 

 marginal vegetation affords practically no stream cover. 



There are two principal irrigation diversions in this section. The 

 first is the Farmer's Canal, located 1/2 mile above the upper end of the 

 Vale valley, and withdrawing about $0 c.f.s. at the time of the survey. 

 There is a temporary dam of loose rock 3 feet high and 60 feet long in 

 connection with this diversion. No fish protective devices are provided. 



The Vines Canal is located 2 miles above the upper end of the Vale 

 valley. It was carrying about 30 c.f.s. at the time of the survey. The 

 irrigation flow is maintained by another loose rock dam about 3 feet high 

 and 60 feet long. There are no fish protective devices These dams would 

 be passable to fish except at low water stages. 



There is no cultivation in this section. The watershed consists of 

 a series of low, rolling hillocks having a sparse cover of sage. 



(3) Harper Valley t- 



Proceeding upstream, the river extends for six miles through the flat 

 Harper Valley. The stream in this section has an average width of 60 feet 

 and a slight gradient. At least one-half of the river bed is composed of 

 mud and silt, with lesser amounts of medium and small rubble, all heavily 

 silted. This section was considered of no possible value to salmon. There 

 are few shallow riffles and numerous resting pools, but the sparse margi- 

 nal vegetation affords almost no stream cover. The water temperature was 

 71,0°F. at the lower end of the valley. At the upper end of Harper Valley 

 the river flow was U80 c.f.s, at the time of observation. 



There are two principal irrigation diversions in Harper Valley, Pro- 

 ceeding upstream, the first, known as the Lower Harper Ditch is located 

 about k miles above the town of Harper. The ditch was carrying about 15 

 c.f.s, at the time of observation. The diversion dam, extending diagonally 

 upstream, is about 3 feet high, and is not a barrier to fish except at low 

 water stages. There are no fish protective devices. 



The Upper Harper Ditch is located about ^ mile above the lower 

 ditch. It was carrying only 3 c.f.s, at the time of observation. 

 The diversion dam is of temporary, loose rock construction, 2 feet 



