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<br />61. Comment: <br /> <br />Response: <br /> <br />62. Comment: <br /> <br />Response: <br /> <br />720 <br /> <br />selenium in total recoverable); major cations and anions; afew general <br />radiometric and organic parameters. The samples will be taken <br />according to USGS depth-integrated procedures. Flow discharge <br />measurements will be taken just before or after the time of sampling for all <br />samples. In addition, afecal coliform sampling plan will be conducted <br />which includes taking samples at Archuleta, Blanco, Bloomfield, Lee <br />Acres, and Farmington. <br /> <br />The draft EA mentions sampling of water quality in Navajo Reservoir. <br />What set of limnological conditions will be monitored and will <br />Reclamation evaluate changes to the thermal stratification of the reservoir. <br />It would also be helpful to explain how the water quality data for the <br />reservoir will be used to assess impacts of alternative dam operations. <br />Navajo Reservoir will not be sampled during the test. Adequate <br />information has already been collected. Afulllimnological suite of <br />analyses was peiformed on Navajo Reservoir, which included nutrients <br />(N03+NO,-N, NHrN. TKN, orthophosphate, Total P), Hydrolab profiles <br />(temperature, dissolved oxygen, pH, conductivity), Secchi depth, <br />biological indicators (phytoplankton, zooplankton, chlorophyll a), major <br />ions (Ca, Mg, Na, K, SO, =, ct, HCOi), total organic carbon, and trace <br />metals (23 metals). Samples were coilected on a quarterly basis during <br />the calendar year 2000, and thermal stratification was monitored using <br />Hydrolab depth profiles. Nutrient, dissolved oxygen, and temperature <br />data are currently being assessed to determine any potential water quality <br />impacts downstream of Navajo Dam. <br /> <br />We are concerned with the increased sediment in the river at the low flow <br />level which will adversely affect the City of Bloomfield's reservoir and <br />could affect the quality of drinking water. <br />During the low flow test, turbidity will be monitored along the river at the <br />water quality sampling locations (Archuleta, Blanco, Bloomfield, and <br />Farmington). It is anticipated that at lower test flows, turbidity will be <br />lower due to the decrease in velocity and sediment dropping out of <br />suspension. The city of Bloomfield reservoir should not be significantly <br />impacted during the 5-10 day low flow test because of the length of canal <br />water has to travel and the lower turbidity in the river. <br /> <br />If a thunderstorm occurs over Gobernador Wash watershed, then sediment <br />into the Citizen's Ditch diversion and the river will increase, but the <br />difference between500 cfs and 250 cfs in the river would probably not <br />significantly alter the effects of the event. Events like this have occurred <br />in the past and will continue to occur with or without the flow test. <br /> <br />28 <br />