Provo River Watershed Council

Promote and support watershed best management practices to ensure high quality water for all users and to meet designated beneficial uses in the Provo River Watershed.

Trends

 

Jordanelle Reservoir TSI

and

Provo River Average Flow 1993 - 2005

The Carlson Trophic State Index (TSI) has been used by the State of Utah to rank and

compare the trophic status of lakes and reservoirs within the state. This index uses

Chlorophyll A or secchi depth data from May to September.  Mesotrophic lakes and reservoirs measure between 40 and 50 on the TSI Scale.

Provo River above Deer Creek TP & TSS Average Concentration 1998 to 2005

This graph shows the historical TP concentrations in the Provo River below Jordanelle Reservoir and above Deer Creek. Jordanelle Reservoir has effectively reduced phosphorus concentrations in the Provo River below the dam since 1993. The reduction in TP is not as apparent in the Provo River as it enters Deer Creek Reservoir

since the concentrations of TP at this point are influenced by a number of sources including Spring Creek, the County Flood Control Channel, Snake Creek, and Midway Fish Hatchery.