## [2000 Biennial Transmission Plan]{.underline}

(Sponsored by WRTA, SWRTA and NRTA)

# I. INFORMATION ANALYZED TO IDENTIFY PATH CONGESTION

In the 2000 Biennial Transmission Plan, the following information was
analyzed to assess Path Congestion:

1.  MW Flow on major paths

    -   Used the hourly MW flow data in the WECC EHV Data Pool database

    -   Seasonal (Spring, Summer, Winter), Peak and Off-Peak

2.  Net Schedule on major paths

-   Used the hourly net schedules in the WECC EHV Data Pool database

-   Seasonal (Spring, Summer, Winter), Peak and Off-Peak

3.  Transmission Congestion Survey

    -   A questionnaire was sent to Transmission Customers asking for
        their experience with having requests for firm capacity denied.
        (See excerpt from Report.)

4.  Unscheduled Flow Mitigation Events (UFAS events)

-   Tabulated the number of Loop Flow curtailment events for the
    Qualified Paths. (See excerpt from Report)

5\. OASIS ATC postings

-   Yearly Firm ATC for the major transmission paths. Data was gathered
    for a single month (April 2000) (See excerpt from Report)

[II. RECOMMENDATIONS TO IMPROVE THE EHV DATA POOL DATABASE]{.underline}

1.  Recommendations

> The following are suggestions for improving the coordination of
> transmission planning and the collection and dissemination of planning
> data in the Western Interconnection:
>
> Suggested improvements to the EHV Data Pool transmission data base:

-   Develop and document "Data Reporting Guidelines" for submitting data
    into the EHV Data Pool to achieve consistent data reporting.

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-   All submitters of data into the EHV Data Pool should review and
    verify that the data submitted is being done correctly. During
    preparation of this report, data errors were found in the following:

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-   Path 53 (Billings Yellowtail) data is actually the Montana Southeast
    path

-   Schedule data being submitted for Path 15 (Midway- Los Banos) is not
    correct according to the California ISO. Also the OTC data reported
    is not correct according to the California ISO.

-   OTC data being submitted for Path 3 (Northwest to Canada) is
    incorrect.

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-   All paths should report net schedules on all transmission paths on
    which schedules exist. Several paths are not reporting net Schedule
    data on scheduling paths (Paths 17, 15, 46, 5, 14, 26, 5, 50, 4, 51,
    24, and 45).

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-   All paths should report OTC. As a minimum, this should be the
    seasonal OTC. This value should change when system conditions
    (outages, etc.) cause the path OTC to change. Several paths are not
    reporting path limits or are reporting the TTC as the path OTC
    limit.

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-   Use consistent directional polarity nomenclature for all paths. This
    needs to be standardized and documented in the Data Reporting
    Guideline document suggested above.

##  

## TRANSMISSION CONGESTION CUSTOMER SURVEY

Transmission Customers were asked through a survey questionnaire to
indicate their experience with transmission congestion in the Western
Interconnection during 1999. Customers were not asked to quantify their
experience in terms of MW or MWHr of lost transactions, rather they were
only asked to list the names of paths over which they have either
experienced congestion or desired to have transmission capacity which
was not available to them. Though this does not provide quantifiable
data that could be used in an economic analysis, it does supplement the
Path Flow Analysis in this report providing additional information to
identify those paths that potentially might benefit the marketplace
through increased capacity.

The following questions were asked:

> \(1\) As a Transmission Customer, are there paths in the Western
> Interconnection over which you have requested and been refused access
> because of unavailable capacity? Was this for firm or non-firm? Which
> paths?
>
> \(2\) Are there paths over which you have desired but not requested
> capacity because the posted ATC was zero or was not adequate to meet
> your need? Was this for firm or non-firm? Which paths?
>
> \(3\) Looking to the future, are there paths over which you see a need
> for additional capacity to meet your needs?
>
> \(4\) If unavailable capacity has not been a problem for you, please
> so indicate.

The following are the responses received to each question:

> **(1) As a Transmission Customer, are there paths in the Western
> Interconnection over which you have requested and been refused access
> because of unavailable capacity? Was this for firm or non-firm? Which
> paths?**

-   COB to Mead 230, COB to Mead 500, COB to Palo Verde, NOB to Mead,
    NOB to Mead 500, NOB to Palo Verde, Palo Verde to Mead, Four Corners
    to Mead.

-   Have been denied non-firm usage from Montana to the BPA network
    (Garrison)

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-   Firm and Non-firm for the following paths: COI due to lack of ATC in
    the Spring and Summer due in part to limited access to Path 15 N
    to S. Pacific DC Intertie due to lack of ATC in Spring and Summer
    due in part to limited access to Path 15 S to N. Canada to PNW
    Intertie, particularly in the Winter. Northwest to Idaho. West of
    Hatwai. North of John Day resulting in real time redispatch.
    TransAlta -- BC Hydro (Inability to obtain firm transmission)

-   Have experienced a few schedule curtailments on the Northern
    Intertie and the Pacific AC and DC Interties.

-   The following paths on both a firm and non-firm basis: Southern
    Intertie (COI and PDCI), BC to Alberta, Montana to PNW, West of
    Hatwai, PNW to Canada in both directions, Montana to Idaho, Path C,
    TOT 2A and TOT 2B.

-   West of Hatwai, LaGrande to Borah, South of COB

-   Main problem has been the Hatwai reduced ATC.

-   Brownlee to Borah and Borah to LaGrande. Path 15 in California. All
    of these were for Firm transmission.

-   Requests for both firm and non-firm on the following paths have been
    refused an/or no ATC:

> PACE-APS PACE-HARRY ALLEN
>
> PACE-WALC PACE-MONA
>
> PACE-SPP PACE-IPC
>
> PACEW-WACM PACEW-FLAMING GORGE
>
> CROSSOVER-MILES CITY MILES CITY-COROSSOVER
>
> YELLOWTAIL-AULT YELLOWTAIL-DAVE JOHNSON
>
> YELLOWTAIL-SIDNEY/STEGALL STEGALL/SIDNEY-YELLOWTAIL
>
> DAVE JOHNSON-BONANZA DAVE JOHNSON-CRAIG/HAYDEN
>
> DAVE JOHNSON-SHIPROCK DAVE JOHNSON-SAN JUAN
>
> GARRISON/HOT SPRINGS-JOHN DAY
>
> GARRISON/HOT SPRINGS-BIG EDDY
>
> GARRISON/HOT SPRINGS-COB
>
> GARRISON/HOT SPRINGS-NOB
>
> MPC-WEST TO BPA or AVISTA limited at times
>
> Requests for non-firm have been refused and/or no ATC (No firm
> available)
>
> COLSTRIP-GARRISON
>
> **(2) Are there paths over which you have desired but not requested
> capacity because the posted ATC was zero or was not adequate to meet
> your need? Was this for firm or non-firm? Which paths?**

-   COB to Mead 230, COB to Mead 500, COB to Palo Verde, NOB to Mead,
    NOB to Mead 500, NOB to Palo Verde, Palo Verde to Mead, Four Corners
    to Mead.

-   Firm and Non-firm for the following paths: COI due to lack of ATC in
    the Spring and Summer due in part to limited access to Path 15 N
    to S. Pacific DC Intertie due to lack of ATC in Spring and Summer
    due in part to limited access to Path 15 S to N. Canada to PNW
    Intertie, particularly in the Winter. Northwest to Idaho. West of
    Hatwai. North of John Day resulting in real time redispatch.
    TransAlta -- BC Hydro (Inability to obtain firm transmission). Borah
    West (inability to purchase firm transmission). Path 15 (No long
    term transmission).

-   Have been several occasions in the past where wanted daily, weekly
    or monthly non-firm on the Pacific AC Intertie, however it is only
    available on a real-time basis.

-   The following paths on both a firm and non-firm basis: Southern
    Intertie (COI and PDCI), BC to Alberta, Montana to PNW, West of
    Hatwai, PNW to Canada in both directions, Montana to Idaho, Path C,
    TOT 2A and TOT 2B.

-   Would like Firm capacity from NE Arizona/NW New Mexico to Denver and
    Colorado Springs. Also, from Arizona to Eastern Texas via the DC
    ties.

> **(3) Looking to the future, are there paths over which you see a need
> for additional capacity to meet your needs?**

-   COB to Mead 230, COB to Mead 500, COB to Palo Verde, NOB to Mead,
    NOB to Mead 500, NOB to Palo Verde, Palo Verde to Mead, Four Corners
    to Mead.

-   Both the southern Intertie (COI and Pacific DC) and the Canada to
    PNW Intertie

-   Path 26 in California, West of Cascades -- North, West of Cascades
    -- South.

-   See a need in the future for increased dependence on ability to
    export and import energy with areas outside the Northwest. This will
    include the need for more capacity to reach the California Market
    including a need to raise the transfer capability of congested paths
    within California. Also see a need for additional capability with
    Canada. Like to see more consistency and stability in the OTC of
    this path. Concerned about possible limitations on the Cross
    Cascades lines in the future. Also, West of Hatwai path may be
    needed and it is experiencing problems today.

-   The following paths on both a firm and non-firm basis: Southern
    Intertie (COI and PDCI), BC to Alberta, Montana to PNW, West of
    Hatwai, PNW to Canada in both directions, Montana to Idaho, Path C,
    TOT 2A and TOT 2B. These constraints will become more of a problem
    in the future.

-   The corridors between SCL and PGE, Mid-C to Puget Sound area, and
    the Cross Cascade lines

-   Would like additional capacity between the US market and the border
    towns in Mexico or a major transmission substation in Mexico. Also
    like additional capacity from the PNW hydro facilities and load
    pockets in the SW.

-   Much of our planned future capacity is in the Wyoming area. (from an
    Oregon utility)

-   Import of power from BPA into the Sierra control area and import of
    power from BPA into the Idaho control area at LaGrande.

-   Additional capacity on the paths in "i" above plus

> More capacity to/from the US and Canada
>
> NW to California
>
> Montana to/from NW
>
> Montana to/from Alberta
>
> Montana to/from Idaho (little Firm available)
>
> Montana to/from Wyoming
>
> Montana, Wyoming, Colorado to/from the MAPP Region
>
> Eastern Wyoming to Utah/Idaho
>
> Wyoming to Colorado/Arizona/New Mexico (little firm available)
>
> Eastern Washington/Idaho (West of Hatwai) to NW
>
> Idaho to NW
>
> Idaho to Utah/Arizona/Nevada
>
> Nevada to California
>
> DSW to California
>
> **(4) If unavailable capacity has not been a problem for you, please
> so indicate.**
>
> No Responses

## 1999 UNSCHEDULED FLOW MITIGATION PLAN EVENTS

Within the Western Interconnection, the unscheduled (or loop flow)
mitigation plan is exercised at the request of the path operator
whenever a path is overloaded and phase shifter operation or schedule
curtailments are required to keep flows within reliability limits. A
path must qualify for operation under the procedure. To qualify, the
path must experience 100 hours of actual flow in excess of 97% of the
Maximum Transfer Limit in the most recent 36 months and have had energy
schedules curtailed because of unscheduled flow. .

An indication of path congestion is (1) whether a path has qualified for
unscheduled flow mitigation and (2) whether the procedure was exercised.
During 1999, the following are "Qualified Paths":

Path Path Qualifying

[\#]{.underline} [Opr ]{.underline} [     Qualified Transfer Path
    ]{.underline} [Direction \*]{.underline}

66 CAISO California-Oregon Intertie CCW

Malin-Round Mt. 500-Kv lines 1&2 (north-south)

Captain Jack-Olinda 500-Kv line

15 CAISO Midway-Los Banos CW

Midway-Los Banos 500 Kv lines 1&2 (south-north)

Gates-Gregg 230 Kv line

Gates-Panoche 230 Kv lines 1&2

Gates-McCall 230 Kv line

20 PAC Path C transmission path CW

Borah-Ben Lomond 345-Kv line (north-south)

Brady-Treasureton 230-Kv line

Goshen-Fish Creek 161-Kv line

American Falls-Malad 138-Kv line

21 APS Arizona-California Interties CW

Navajo-McCullough 500 Kv line (east-west)

Moenkopi-Eldorado 500 Kv line

Palo Verde-Devers 500 Kv line

Palo Verde-North Gila 500 Kv line

Liberty-Mead 345 Kv line

Liberty-Parker 230 Kv line

Pinnacle Peak-Davis 230 Kv line

West Phoenix-Parker 230 Kv line

22 APS Four Corners-Central Arizona CW

Four Corners-Moenkopi 500-Kv line (east-west)

Four Corners-Cholla 345-Kv lines 1&2

23 APS Four Corners 345/500-Kv Transformer CW

with Four Corners Unit 5 out of (low-high)

service or at greatly reduced output

30 WACM TOT 1A transmission path CW

Hayden-Artesia-Vernal 138 Kv (east-west)

Meeker-Rangely-Bonanza 138 Kv

Bears Ears-Bonanza-Mona 345 Kv

31 WACM TOT 2A transmission path CW

Hesperus-San Juan 345 Kv line (north-south)

Lost Canyon-Shiprock 230 Kv line

Durango-Shiprock 115 Kv line

36 WACM TOT 3 transmission path CW

Laramie River-Ault 345-Kv line (north-south)

Laramie River-Story 345-Kv line

Archer-Ault 230-Kv line

Sidney-N. Yuma 230-Kv line

Sidney-Sterling 115-Kv line

Cheyenne-Rockport 115-Kv line

\* Direction in which the Path is qualified to request Unscheduled Flow
relief:

CCW = Counterclockwise direction

CW = Clockwise direction

Table I summarizes the experience of each Qualified Path during 1999:

**TABLE I**

**Unscheduled Flow Mitigation Events**

**1999**

+------------+--------+--------+-----------+--------------------------+
| ## PATH    | **\#   | *      | *         | **COMMENTS**             |
|            | OF USF | *Phase | *Schedule |                          |
|            | EV     | S      | Cu        |                          |
|            | ENTS** | hifter | rtailment |                          |
|            |        | hrs**  | hrs**     |                          |
+------------+--------+--------+-----------+--------------------------+
|            |        |        |           |                          |
+------------+--------+--------+-----------+--------------------------+
| COI (P 66) | 18     | 118    | 25        | Occurred primarily       |
|            |        |        |           | during June -- Aug. 1999 |
+------------+--------+--------+-----------+--------------------------+
|            |        |        |           |                          |
+------------+--------+--------+-----------+--------------------------+
| Path 15    | 39     | 274    | 35        | Occurred primarily       |
|            |        |        |           | during Oct to Nov 1999   |
+------------+--------+--------+-----------+--------------------------+
|            |        |        |           |                          |
+------------+--------+--------+-----------+--------------------------+
| Path 20    | 12     | 94     | 21        | Occurred mainly Apr to   |
|            |        |        |           | June 1999                |
+------------+--------+--------+-----------+--------------------------+
|            |        |        |           |                          |
+------------+--------+--------+-----------+--------------------------+
| Path 21    | 0      |        |           | No events during 1999    |
+------------+--------+--------+-----------+--------------------------+
|            |        |        |           |                          |
+------------+--------+--------+-----------+--------------------------+
| Path 22    | 10     | 62     | 10        | Occurred mainly Sept     |
|            |        |        |           | 1999                     |
+------------+--------+--------+-----------+--------------------------+
|            |        |        |           |                          |
+------------+--------+--------+-----------+--------------------------+
| Path 23    | 7      | 62     | 2         | Occurred mainly Dec 99   |
|            |        |        |           | to Feb 00                |
+------------+--------+--------+-----------+--------------------------+
|            |        |        |           |                          |
+------------+--------+--------+-----------+--------------------------+
| Path 31    | 3      | 18     | 0         | Occurred during Sept     |
|            |        |        |           | 1999                     |
+------------+--------+--------+-----------+--------------------------+
|            |        |        |           |                          |
+------------+--------+--------+-----------+--------------------------+
| Path 36    | 37     | 348    | 110       | Occurred mainly July to  |
|            |        |        |           | Sept 1999                |
+------------+--------+--------+-----------+--------------------------+

**OASIS POSTED FIRM ATC**

Transmission Providers are required to post on the OASIS, transmission
capacity that is available for purchase. The available transfer
capability, ATC, is the operating transfer capability, less reliability
margins and existing transmission commitments/reservations. ATC is
posted for both firm and non-firm capacity. An ATC posting of zero is an
indication that the path is fully subscribed for the posted time
interval. This, therefore, is another indication of a heavily used and
potentially congested transmission path if the posted ATC value is zero
or small compared to the capacity of the path.

The information in the table below was obtained from the transmission
owner's OASIS sites. The data represents yearly firm ATC for the period
2000 to 2001 except for Pacificorp and Idaho Power who did not post
yearly firm. Monthly firm was used in those two cases. Yearly Firm was
chosen as being indicative of the Transmission Customer's long term
needs/uses of the path and also indicative of the potential need for
additional path capacity on a long term planning basis. The information
was obtained during the month of April 2000.

The focus of this analysis was on the WSCC paths in the WSCC Path Rating
Catalog. Other paths are posted on the OASIS sites for which there may
be zero Yearly Firm ATC. Some of these are internal paths that may not
involve one of the WSCC rated paths. Others span several control areas
over which the Provider has capacity rights. There was no attempt in
this analysis to identify all paths in the West for which there is zero
firm capacity, however this would be good to include in future Biennial
Plans since this should correlate closely with the congestion experience
of Transmission Customers.

It should not be assumed that this data is complete for each path. This
would have required knowledge of all of the rights holders on each path
and a search of each rights holders OASIS sight. This effort was not
felt necessary for the purposes of this report.

Effort was made to make the ATC information reported in the Table below
accurate, however this information should not be relied upon for
commercial uses. The Providers OASIS sights are the location for an
accurate listing of reservation products and available capacity.

**TABLE II**

**OASIS Posted Long Term Firm ATC Values**

(all values are yearly firm except Pacificorp and Idaho Power which are
monthly firm)

+--------------------+-------------------------------------------------+
| **PATH**           | **ATC -- Long Term FIRM**                       |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P3/ Northwest to   | BPA posting 0 MW ATC in both directions         |
| Canada             |                                                 |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P4/ West of        | An internal path which is not posted on OASIS   |
| Cascades N         |                                                 |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P5/ West of        | An internal path which is not posted on OASIS   |
| Cascades S         |                                                 |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P6/ West of Hatwai | BPA posting 0 MW ATC                            |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P8/ Montana to NW  | BPA posting 0 MW ATC to Montana and 145 MW from |
|                    | Montana to BPA                                  |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P14/ Idaho to      | BPA posting 0 MW ATC to Idaho                   |
| Northwest          |                                                 |
|                    | IPC posting 0 MW BPA to IPC and 0 to 124 MW IPC |
|                    | to BPA                                          |
|                    |                                                 |
|                    | IPC posting 0 MW to and from Pacificorp         |
|                    |                                                 |
|                    | IPC posting 0 MW Avista to IPC and 315 MW IPC   |
|                    | to Avista                                       |
|                    |                                                 |
|                    | Pacificorp posting 264 MW IPC to Pacificorp     |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P15/ Midway -- Los | LADWP posting 269 MW ATC S to N across path and |
| Banos              | 134 MW ATC N to S across path. CaISO not        |
|                    | posting ATC.                                    |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P16/ Idaho --      | SPP posting 233 MW from Midpoint to SPP and 303 |
| Sierra             | MW from SPP to N. Valmy. IPC posting monthly    |
|                    | ATC of 34 MW into IPC and 422 MW into SPP over  |
|                    | the path.                                       |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P17/ Borah West    | IPC posting 0 MW ATC from Jim Bridger to        |
|                    | Midpoint (E to W).                              |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P18/ Idaho --      | MPC posting 79 MW ATC into MPC over the Amps    |
| Montana            | line and 87 MW ATC into MPC over the Jefferson  |
|                    | line                                            |
|                    |                                                 |
|                    | Pacifcorp posting 0 MW ATC in both directions   |
|                    | over the Amps line                              |
|                    |                                                 |
|                    | IPC posting 87 MW Jefferson to IPC and 52 MW    |
|                    | IPC to Jefferson                                |
|                    |                                                 |
|                    | IPC posting 0 MW Amps to IPC and 0 to 50 MW IPC |
|                    | to Amps                                         |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P19/ Bridger West  | IPC posting 0 MW ATC E to W and 200 MW ATC W to |
|                    | E                                               |
|                    |                                                 |
|                    | Pacificorp posting 164 MW Bridger to PACWest.   |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P20/ Path C        | Pacificorp posting 578 MW ATC IPCO to Path C    |
|                    | and 771 MW ATC for Path C to IPCO, monthly firm |
|                    | (no yearly firm posted)                         |
|                    |                                                 |
|                    | IPC posting 0 MW Borah to IPC and 550 MW IPC to |
|                    | Borah                                           |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P22/ SW of 4       | APS posting 0 MW ATC from FC345 to Cholla (N to |
| Corners            | S) and 763 MW ATC from Cholla to FC (S to N)    |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| **PATH**           | **ATC -- Long Term FIRM**                       |
+--------------------+-------------------------------------------------+
| P23/ 4Corners Tx.  | No OASIS postings                               |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P24/ PG&E -- SPP   | SPP posting 100 MW ATC in both directions       |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P26/ N to S        | LADWP posting 134 MW ATC Midway to Palo Verde   |
| California         | or to Sylmar (N to S)                           |
|                    |                                                 |
|                    | LADWP posting 0 MW from Palo Verde to COB       |
|                    |                                                 |
|                    | Cal ISO not posting Path 26 ATC                 |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P27/ IPP DC Line   | LADWP posting 35 MW ATC from IPP to Adelanto    |
|                    | (NE to SW) and 833 MW ATC from Adelanto to IPP  |
|                    | (SW to NE)                                      |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P30/ TOT 1A        | Tri State only posts non-firm ATC               |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P31/ TOT 2A        | Tri State only posts non-firm ATC               |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P32/ Pavant --     | SPP posting 0 MW ATC E to W and 260 MW ATC W to |
| Gonder             | E                                               |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P34/ TOT 2B        | Pacificorp posting 0 MW monthly firm ATC for 4  |
|                    | Corners to PAC, both directions. (No yearly     |
|                    | firm posted)                                    |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P35/ TOT 2C        | Pacificorp posting 0 MW monthly firm ATC for    |
|                    | PAC to Harry Allen and 200 MW monthly firm ATC  |
|                    | for Harry Allen to PAC. (No yearly firm posted) |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P36/ TOT 3         | Tri State only posts non-firm ATC               |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P45/ SDG&E -- CFE  |                                                 |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P46/ W of Colorado | LADWP posting 1711 MW from LA system to         |
| R.                 | Eldorado (W to E), 625 MW ATC from McCullough   |
|                    | to Victorville (E to W) and 217 MW ATC from     |
|                    | Marketplace to Adelanto (E to W)                |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P47/ S. New Mexico | El Paso indicated there is no Firm W to E. PNM  |
|                    | posting 0 MW ATC from Greelee to El Paso (W to  |
|                    | E). and 750 MW ATC from El Paso to Greelee (E   |
|                    | to W)                                           |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P49/ E of Colorado | SRP posting 236 MW ATC in both directions (from |
| R.                 | Marketplace to West Wing, Palo Verde to Mead    |
|                    | and West Wing to Marketplace). LADWP posting    |
|                    | 327 MW ATC from Eldorado to Palo Verde (W to    |
|                    | E). APS posting 140 MW from N. Gila to Palo     |
|                    | Verde (W to E) and 236 MW from Mead to West     |
|                    | Wing (W to E).                                  |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P50/ Cholla --     | APS posting 421 MW ATC from Cholla to PP (N to  |
| Pinnacle Pk        | S) and 1876 MW ATC from PP to Cholla (S to N)   |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P51/ Southern      | APS posting 421 MW from Cholla to Navajo and    |
| Navajo             | 449 MW from West Wing to Navajo (S to N).       |
+--------------------+-------------------------------------------------+
| **PATH**           | **ATC -- Long Term FIRM**                       |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P53/ Billings --   | MPC posting 400 MW ATC at Yellowtail.           |
| Yellowtail         |                                                 |
|                    | Pacificorp posting 400 MW ATC PACW to           |
|                    | Yellowtail and 300 MW Yellowtail to PACW.       |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P65/ Pacific DC    | BPA posting 0 MW ATC from Big Eddy to NOB and   |
| Intertie           | 2558 MW ATC from NOB to Big Eddy                |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+
| P66/ COI           | BPA posting 0 MW ATC from John Day to COB (N to |
|                    | S) and 1395 MW from COB to John Day (S to N)    |
|                    |                                                 |
|                    | PGE posting 0 MW from John Day to COB (N to S)  |
|                    | and 0 MW from COB to JD (S to N)                |
+--------------------+-------------------------------------------------+
|                    |                                                 |
+--------------------+-------------------------------------------------+