My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
WSP03460
CWCB
>
Water Supply Protection
>
Backfile
>
3001-4000
>
WSP03460
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/26/2010 12:50:31 PM
Creation date
10/11/2006 11:44:53 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8441.700
Description
Colorado Big Thompson Project - Annual Operating Plans
Basin
South Platte
Water Division
1
Date
1/1/1989
Title
Annual Operating Plans - Colorado Big Thompson Project - Water Year 1989-1990
Water Supply Pro - Doc Type
Report/Study
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
79
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br />o <br />Cl <br />~ <br />-:i <br />Ci) <br />~ <br /> <br />ANNUAL OPERATING PLAN FOR WATER YEAR 1990 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Three operation studies wer-e developed for the Project to establish an <br />AOP for- water- year 1990. Each of the studies conformed to the <br />established oper-ating cr-iteria but used differ-ent inflow conditions and <br />differ-ent water- demand conditions. <br /> <br />The three inflow conditions wer-e deter-mined from a probability analysis <br />of histor-ic inflows and wer-e labeled r-easonable minimum, reasonable <br />maximum, and most probable. Reser-voir inflow during water year 1990 has <br />a one-in-ten chance of being less than the r-easonable minimum and a <br />one-in-ten chance of being greater- than the reasonable maximum. <br />Statistically, inflows in 1990 will have an eight-in-ten chance of <br />falling between the two extremes. The most probable inflow is based on <br />long-ter-m aver-ages and appr-oximates a 50 percent chance of occur-rence. <br />The thr-ee stud i es for- water year 1990 are sUl1l11ari zed numeri ca lly in <br />tables 5A, 5B, and 5C and graphically in exhibits 4 thr-ough 9. The <br />annual oper-ating plans for Green Mountain Reser-voir are also summar-ized <br />in table 6. <br /> <br />The AOP, as developed and reflected in the three studies, provides the <br />f 1 exi bi 1 ity to adj us toper-at ions as cond it ions change duri ng the water <br />year. Forecasts of the April-July r-eservoir inflow will be made at the <br />beginning of each month for Februar-y thr-ough June. Projected operating <br />schedules wi 11 be adjusted, as required, throughout the water- year as <br />changes occur in the forecasted inflows, irrigation demands, maintenance <br />schedules, and power- loads. <br /> <br />October--January Period <br /> <br />The three studies for- the October-January per-iod of water year 1990 ar-e <br />similar because winter inflows ar-e assumed to be nearly the same under <br />the three conditions of inflow. Therefore, the most pr-obable inflow <br />condition is utilized for- the 1990 October-Januar-y Pr-oject operations <br />that are summar-ized in the following paragraphs. Operations for this <br />per-iad account for- scheduled maintenance on several power-plants and <br />other- pr-oject features. <br /> <br />Color-ada-Big Thompson Project <br /> <br />Green Mountain Reservoir <br /> <br />Green Mountain Reser-voir- began the water year- with 98,OOO acre-feet in <br />star-age, which was 76 per-cent of the 1959-1985 aver-age. Releases for- <br />r-eplacement, bypass of inflow, and natur-al flow shortage will continue <br />unt i 1 the end of October. Lit t 1 e dep 1 et i on by Colorado Spri ngs and <br />Denver- is expected until next r-unoff season. Releases from Gr-een <br />Mountain Reservoir- for replacement, bypass of inflow, power, and r-iver <br />and r-eservoir operations ar-e expected to average 160 ft3/s during the <br />November-Januar-y period. These releases will lower storage to about <br />69,000 acr-e-feet by January 31. <br /> <br />16 <br />
The URL can be used to link to this page
Your browser does not support the video tag.