Three Colorado utilities plan 24 transmission projects over 10 years

Black Hills Energy, Tri-State Generation and Transmission, and Public Service Company of Colorado plan to build or upgrade a total of 24 transmission projects in the state of Colorado over the next 10 years.

The projects are detailed in the joint “2012 Ten-Year Transmission Plan for the State of Colorado” the utilities filed jointly with the Colorado Public Utilities Commission (PUC) on Feb. 1.

Rule 3627, adopted by the PUC in March 2011, requires the preparation and biennial submission of ten-year transmission plans “to coordinate the planning for additional electric transmission in Colorado,” and must include all proposed facilities 100-kV or greater, the joint report said. The joint plan is the first to be filed under the mandate of that rule.

“Historically, transmission system planning was performed to meet the basic reliability needs of the local customers under most foreseeable circumstances,” the report said. “Increasingly, planners must consider additional drivers such as increased access to markets, public policy initiatives, interconnection of remote renewable generation and other resources, local and regional transmission collaboration, environmental concerns, and mandatory reliability standards,” the report continued.

The 69-page report and six associated appendices totaling 210 pages included details of the lines the three utilities plan to build or upgrade, as well as details for planned construction or upgrades of numerous substations and distribution facilities.

Black Hills Energy (BHE) identified six projects that would “increase reliability in the event of a contingency situation, accommodate new generation interconnections, or a combination of the two,” the report said.

BHE listed four projects identified as “SB07-100” projects – projects intended to enhance the state’s use of renewable resources – and two additional transmission projects.

Tri-State Generation and Transmission (TSG&T) lists eight transmission projects, including two it is developing jointly with Public Service Company of Colorado (PSCo).

PSCo lists five SB07-100 projects in addition to the two it is developing with Tri-State, plus five additional transmission projects.

The projects listed are in one of four stages of development: conceptual, planned, under construction, or in-service.

In addition to the three utilities included in the joint plan, appendices include details on projects by the Western Area Power Administration (WAPA) – four lines either built or upgraded; the Platte River Power Authority (PRPA) – two lines; and LS Power’s (LSP) Wyoming-Colorado Intertie, a 180-mile, 345-kV line intended to facilitate new generation resources in Wyoming.

Black Hills Energy is a Black Hills Corp. (NYSE: BKH) company. Public Service Company of Colorado is owned by Xcel Energy (NYSE:XEL).





























Utility

Project

Length (mi)

Cost

BHE

La Junta Tri-State Interconnection 115-kV, new

0.5

$6m

BHE

Pueblo-Hyde Park-West Station 115-kV, rebuild

5

$2.7m

BHE

Greenhorn-Reader 115-kV, new

4

$3m

BHE

Reader-Rattlesnake Butte 115-kV, new

36

$14.1m

BHE

Baculite Mesa-Overton 115-kV, rebuild

4

$2m

BHE

Portland-West Station 115-kV, new 2nd line & substation upgrade

20

$12.5

TSG&T

Big Sandy-Calahan 230-kV, new

55

$52.9m

TSG&T

Burlington-Wray 230-kV, new

60

$40.3m

TSG&T

Falcon-Midway 115-kV, uprate

27

$5.6m

TSG&T (w/PSCo)

Lamar-Front Range Road 345-kV, new

500

$900m

TSG&T

Plaza-Waverly 115-kV, upgrade

30

$10.9m

TSG&T

San Juan Basin Energy Connect Project 230-kV, new

70

$129.5m

TSG&T (w/PSCo)

San Luis Valley-Calument-Commanche project 230-kV, new

140

$180m

TSG&T

United Power System Improvement Project 115-kV, new

5

$4.8m

PSCo

Ault-Cherokee 230-kV, new

90

$77m

PSCo

Lamar-Vilas 230/345-kV, new

57

$90m

PSCo

Midway-Waterton 345-kV, new

82

$35m

PSCo

Pawnee-Daniels Park 345-kV, new

124

$80m

PSCo

Pawnee-Smoky Hill 345-kV, new

95

$152m

WAPA

Craig-Rifle 230-kV, uprate

100

$1.5m

WAPA

Estes-Flatiron 115-kV, rebuild

17

$18.9m

WAPA

Granby-Windy Gap 138-kV, new

12

$19m

WAPA

Sidney-Peetz-Sterline 115-kV, rebuild

39

$12m

PRPA

Dixon-Horseshoe 230-kV, upgrade from 115-kV

9

$27.2

PRPA

Fordham-Fort St. Vrain 230-kV, upgrade from 115-kV and rebuild

22

$81.7