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Cosumnes power plant (01-afc-19) data response, set 1A


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Insert Figure NO-63



Technical Area: Project Description

CEC Author: Kristy Chew

CPP Author: Kevin Hudson

Background

AFC Section 2.4.3, Fuel Availability, states that there is only enough capacity through the interstate line and at the terminal supply for the first phase of the project and that a new line is required for the second phase.


Data Request

  1. Please describe where the new natural gas line and any related facilities (e.g., compressor station) for the second phase would be located. Provide figures at a scale similar to AFC Figure 6.2-1 (approximately 1” = 3 miles) depicting the route of the new natural gas supply line and related facilities.

Response: The primary plan for supplying natural gas to Phase II is through the existing and proposed 26-mile extension of the District pipeline, with pressure enhanced by compression. Since a suitable supply is available, a second pipeline is not necessary. Second phase compressor stations will be located at the PG&E lines 400 and 401 inter-tie at 27700B County Road 29 in Winters, California, and near the Carson Ice-Gen Plant, which is the originating point of SMUD’s pipeline extension. The Carson compression station will be located at the valve and measurement crosstie number 190, which is located off of an access road from Franklin Boulevard near the Carson Ice Gen Plant.

  1. Please provide a schedule for the construction of the new pipeline.

Response: Since the second phase of the project can be served by SMUD’s existing pipeline network and proposed 26-mile extension, a second pipeline is not necessary. Therefore, a construction schedule for a second pipeline is not needed.

  1. Please explain when the information (biological surveys, cultural resource surveys, land uses etc.) required for evaluating the new pipeline will be provided.

Response: Since the second phase of the project can be served by SMUD’s existing pipeline network and proposed 26-mile extension, a second pipeline is not necessary. Therefore, information such as biological surveys, cultural resource surveys, and land uses is not needed.

  1. Please explain why SMUD is not proposing to construct only one pipeline for both phases of the project.

    Response: Recent calculations performed after the AFC was filed show the second phase of the project can indeed be served by SMUD’s existing pipeline network and proposed 26-mile extension, with compression. A second pipeline was considered for enhanced reliability and redundancy for the plant, but this is speculative at this point.



Technical Area: Traffic and Transportation

CEC Author: James Fore

CPP Authors: Jeanne Acutanza and Joe Pennington

BACKGROUND

AFC Section 8.10.4.3 for the Cosumnes Power Plant (CPP) provides information on the truck route for hazardous material delivery to the plant site. The truck route described in the AFC does not indicate the roadway conditions or if there are any sensitive receptors in the area.


DATA REQUEST

  1. Please specify the location of any sensitive receptors along the route such as schools, hospitals, commercial, or housing development that may be on the route and/or impacted by its operation.

Response: Figure T&T-73 identifies sensitive receptors within 3 miles of either side of the ammonia route, between Highway 99 and the plant site. There are four sensitive receptors in the town of Galt (about 2 miles south of Highway 99 and Twin Cities Road) and two sensitive receptors in the community of Herald, along Twin Cities Road.
BACKGROUND

The AFC for the CPP indicates that natural gas fuel will be supplied for the project from Pacific Gas and Electric (PG&E) pipelines 400 and 401 located near Winters. The CPP natural gas pipeline extension will originate at the Carson Ice-Gen Project near Elk Grove, with a 24-inch natural gas pipeline to the CPP. The pipeline route will be approximately 26 miles. The AFC provides information on the pipeline route, but does not indicate traffic conditions associated with the roadways impacted or what action will be taken to ensure minimal disruption to traffic along the route.





DATA REQUEST

  1. Please provide information on the impact that the proposed PG&E pipeline extension will have on traffic associated with the various roadways involved for the proposed route as well as alternate routes. This would include:

  1. a description of the affected roadways,

  2. the current level of service (LOS) for roadways impacted by the pipeline route,

  3. the location of the pipeline within the roadway,

  4. the number of traffic lanes to be closed,

  5. the amount of roadway under construction at any one time.

    f. the impact on traffic flow,

    g. anticipated traffic control measures that will be used, and



  1. discussion of the type of construction activity.

Response: SMUD recognizes that construction in or near a roadway can be less than desirable since lane closures and traffic management are required. In recognition, the current pipeline alignment has been designed to minimize construction within existing roadway pavement. SMUD is pursuing easements for the pipeline on private property. However, crossing existing roadways cannot be avoided. SMUD is currently in the process of defining the exact location of the pipeline within the corridor identified on the AFC figures. At this time, the pipeline will cross the following roads as described:
Sims Road: The current LOS is A; the road will be open cut perpendicular to the direction of travel to allow placement of the pipe across the roadway; one traffic lane will be closed at a time; only the amount of the roadway necessary to accommodate the pipe installation will be under construction; there is no anticipated impact on traffic flow, and County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorists of construction activity in or alongside the roadway.
Dwight Road: The current LOS is A; the road will be open cut perpendicular to the direction of travel to allow placement of the pipe across the roadway; one traffic lane will be closed at a time; only the amount of the roadway necessary to accommodate the pipe installation will be under construction; there is no anticipated impact on traffic flow, and County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorists of construction activity in or alongside the roadway.
Franklin Boulevard at the railroad tracks south of Elk Grove Boulevard: The current LOS is B; the pipeline will cross underneath the roadway by jack and bore; no traffic lanes will be closed, no amount of the roadway will be under construction; there is no anticipated impact on traffic flow other than onlooker slowing, County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorists of construction activity along the side of the roadway.
Bilby Road east of the town of Franklin: The current LOS is A; the road will be open cut perpendicular to the direction of travel to allow placement of the pipe across the roadway; one traffic lane will be closed at a time; only the amount of the roadway necessary to accommodate the pipe installation will be under construction; there is no anticipated impact on traffic flow, County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorists of construction activity in or alongside the roadway.
Bruceville Road north of Eschinger: The current LOS is A; the pipeline will cross underneath the roadway by jack and bore; no traffic lanes will be closed, no amount of the roadway will be under construction; there is no anticipated impact on traffic flow other than onlooker slowing, and County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorist of construction activity along the side of the roadway.
Eschinger Road east of Highway 99: The current LOS is A; the road will be open cut perpendicular to the direction of travel to allow placement of the pipe across the roadway; one traffic lane will be closed at a time; only the amount of the roadway necessary to accommodate the pipe installation will be under construction; there is no anticipated impact on traffic flow, and County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorists of construction activity in or alongside the roadway.
Highway 99 at Arno Road: The current LOS is C. The pipeline will cross underneath Highway 99 by horizontal directional drilling. No traffic lanes will be closed, no amount of the roadway will be under construction; there is no anticipated impact on traffic flow; since the HDD apparatus is positioned away from the highway, there is no traffic control necessary.
Arno Road: The current LOS is A; the pipeline will cross underneath the roadway by jack and bore; no traffic lanes will be closed, no amount of the roadway will be under construction; there is no anticipated impact on traffic flow, County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorists of construction activity along the side of the roadway.
Oak Road: The current LOS is A; the road will be open cut perpendicular to the direction of travel to allow placement of the pipe across the roadway; one traffic lane will be closed at a time; only the amount of the roadway necessary to accommodate the pipe installation will be under construction; there is no anticipated impact on traffic flow, County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorists of construction activity in or alongside the roadway.
Alta Mesa Road: The current LOS is A; the pipeline will cross underneath the roadway by jack and bore; no traffic lanes will be closed, no amount of the roadway will be under construction; there is no anticipated impact on traffic flow, County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorists of construction activity along the side of the roadway.
Twin Cities Road (Hwy 104) between Laguna Road and Clay East Road: The current LOS is A; the pipeline will be placed between the railroad tracks and the roadway, and there are no activities anticipated in the roadway; no traffic lanes will be closed; no amount of the roadway will be under construction; there is no anticipated impact on traffic flow, other than possible onlooker slowing; County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorists of construction activity alongside the roadway.
Clay Station Road: The current LOS is A; the pipeline will cross underneath the roadway by jack and bore; no traffic lanes will be closed, no amount of the roadway will be under construction; there is no anticipated impact on traffic flow, County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorists of construction activity along the side of the roadway.
Twin Cities Road (Highway 104) at Clay East Road: The current LOS is A; the pipeline will cross underneath the roadway by jack and bore; no traffic lanes will be closed, no amount of the roadway will be under construction; there is no anticipated impact on traffic flow other than possible onlooker slowing, County-approved traffic control standards such as flaggers and construction warning signs will be used to warn motorist of construction activity alongside the roadway.
In General: Most roadway crossings will be jack and bored; however, in consultation with the County of Sacramento, there may be roads with low levels of traffic where open cut is preferred. County permits will specify if the roadway can be cut. Where trenching is not allowed, the roadways will be bored. In roads where no lanes are closed, flaggers may still be present, if necessary, to assist trucks entering or exiting the roadway. This will be determined by County traffic control and permit requirements.
To allow flexibility and provide the best opportunity for an efficient installation, the pipeline construction contractor will be given the opportunity to obtain the excavation permit and the associated traffic control plan from the required agencies (Sacramento County). SMUD will work with county and city agencies to determine their traffic control plan requirements and excavation permit requirements – especially involving limitation on the working periods and amount of lane closures prior to the issuance of the construction contract (for bidding purposes). SMUD does not intend or expect any complete street closures.
Background

AFC Section 8.10.3.2 identifies that Sacramento County has public transportation and bicycle routes throughout the county but does not indicate if the CPP will impact any of the facilities during construction or operation.


Data Request

  1. Please supply information on any public transportation routes or services in the area that will be impacted. This would include bus routes and park and ride parking areas.

Response: The gas line will cross Route 52 along at some point on Laguna Boulevard between Laguna Main Street and Franklin Boulevard. Route 52 operates five trips inbound from Elk Grove to Downtown Sacramento in the am. Route 52 operates one trip outbound from downtown Sacramento in the am and five trips outbound in the p.m. These are on normal weekdays only. the pipeline will cross underneath the roadway by jack and bore; no traffic lanes will be closed, no amount of the roadway will be under construction; there is no anticipated impact on BUS Service. There are no park and ride areas along the gas line that will be impacted.

  1. Please identify any roadways with bicycle routes and the impact the construction and/or operation of the facility would have on the routes.

Response: There are no bicycle routes along Twin Cities Road or Clay East Road.

  1. If bicycle routes exist on any of the roadways impacted, indicate what steps will be taken by the applicant to ensure safe use of the affected bicycle facilities.

Response: Not applicable.
Background

AFC Section 8.10.4.2 indicates that roads referred to as the “primary roadways” to and from the project site (i.e., Clay East Road, Twin Cities Road and SR 99) will experience the greatest traffic volume. This section also indicates that existing vehicle occupancy levels are estimated to be 1.3 persons per vehicle during commute hours based on 1990 census data. The section also concludes that the project will result in minimum traffic impact for the area roadways, without indicating the trip distribution expected for the construction workforce.


DATA REQUEST

  1. Please indicate the expected traffic route for the construction workforce along with the estimated volume of traffic associated with each route.

Response: Construction hours for the project are from 7:00 am to 3:30 pm. Therefore, LOS D or better is maintained in the p.m. peak hour with or without the project. Based on projected project traffic volumes, construction of the project may contribute to minor delays on the existing roadway network or affect traffic circulation in the area. However, the temporary nature of these potential construction-related impacts, combined with appropriate mitigation measures, should keep potential traffic impacts at a level of insignificance.

TABLE T&T-78

Peak Construction Project Traffic Volumes and LOS on Routes Used by Construction Workers



Route

Annual Average Daily Traffic a

Annual Average Peak Hour Traffic

Peak Project Construction Daily Traffic

Peak Hour Traffic plus Project

Existing LOS

LOS with Peak Project Construction

State Route 99

55,000

4,700 a

590

4,700

C

C

State Route 104/ Twin Cities Road

3,800

460 a

590

460

A

A

Clay East Road

N/A

50

590

50

A

A

a Caltrans, 2000.
N/A not available

  1. Please provide information based on SMUD experience with construction projects to substantiate the assumption of 1.3 persons per vehicle.

Response: Within the past 8 years, SMUD has built 3 cogeneration plants in Sacramento County. As part of its commitment to lowering vehicle emissions and reducing traffic impacts in the area, SMUD has required its contractors to submit construction traffic control plans that encourage car-pooling. In addition, SMUD actively operates several vanpools for its employees to commute to major sites, including its downtown headquarters and Rancho Seco. It is also typical for journeyman craftsmen, such as machinists, boilermakers, and carpenters, to travel with an assistant or apprentice to jobsites. The combination of these activities assists in the assumption of 1.3 persons per vehicle.

BACKGROUND

AFC Section 8.10.4.2 indicates that the number of truck trips associated with construction material for the project are expected to be low, an estimated 10 trucks per day, with a maximum of 20 trucks daily. Later in the section additional truck trips are identified for the delivery of hazardous materials and the removal of waste for disposal. It is not clear if the estimated 10 truck trips with a maximum of 20 truck trips, include only construction materials or all truck trips.



DATA REQUEST

  1. Please provide a table indicating the number and type of truck trips per month that the project will generate during construction.

Response: The estimated number of trucks in Table T&T-80 includes those hauling hazardous materials, which are estimated not to exceed 20 trips daily during peak months.


Table T&T-80

SMUD Consumnes Power Plant Truck Trips Estimate by Month of Project



Phase I









































































MONTH

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

# TRUCKS

8

14

30

37

47

49

67

106

143

179

193

207

200

178

149

149

149

116

116

91

91

50

18

11












































































Phase 2









































































MONTH

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44



















# TRUCKS

30

38

40

54

86

116

145

156

167

161

144

121

121

121

94

94

74

41























BACKGROUND

The AFC does not indicate if the project will have an impact on air traffic. There are several local landing strips for small airplanes located throughout Sacramento County. The Sunset Skyranch Airport is one example located northwest of the CPP.



Data Request

  1. Please supply location information (i.e., addresses, or location near mapped roads) for airport facilities in the area.

Response: The nearest airport is the Lodi Airport located at 23987 N. Highway 99, Acampo, CA (at Peltier Road and Hwy 99). It is more than 10 miles (8.7 nautical miles) from the site. Sunset Skyranch Airport is located in Elk Grove, CA south of the intersection of Grant Line Road and Bradshaw Road. This landing strip is located more that 12 miles (10.4 nautical miles) from the site.

  1. Please discuss the steps the applicant will take to ensure that the power plant’s stacks do not present a traffic hazard to these local airports.

Response: The neighboring Rancho Seco plant has two prominent hyperbolic cooling towers approximately 426 feet tall with FAA warning lights. The CPP stacks will be about 160 feet tall. The area surrounding CPP is used for open grazing land and does not use crop dusting or other aerial services. Presently, air space around Rancho Seco is restricted. According to FAA regulations (14 CFR 77.23), a structure needs to be more than 200 feet above ground level or within 3 nautical miles of an airport to be of concern. Therefore, due to the distance from these airports and the height of the plant’s tallest structures, there is no hazard to air traffic from CPP.
BACKGROUND

AFC Section 8.11.5.3.3 indicates the potential for vapor plumes to be emitted by the facility. There is a potential for visibility impairment to traffic due to vapor plumes produced by the project reaching ground level, or casting shadows that could cause drivers to be temporarily blinded by a sudden change in light intensity. This may affect traffic safety on the local roadways in the vicinity of the project site.


DATA REQUEST

  1. Please provide information based on your plume analysis for:

  1. the roadways that might be impacted,

  2. the expected frequency and duration of traffic impacts from ground fog or shadows, and

  3. the traffic safety issues resulting from the plumes.

Response: This question will be responded to on January 18, 2002.

  1. Please discuss the applicant’s plans for mitigating any traffic safety and visibility impacts caused by vapor plumes.

Response: This question will be responded to on January 18, 2002.
Background

AFC Section 6.0 describes the proposed natural gas pipeline route as using the Western (Union) Pacific Railroad right-of-way (ROW).


Data Request

  1. Please provide a description of the coordination efforts with Union Pacific Railroad for ROW approval. Also provide contact information for the Union Pacific Railroad staff coordinating the ROW approval.

Response: SMUD will be contacting the Union Pacific Railroad for information along the railroad corridors and for ROW approval once a more precise pipeline alignment has been determined. Three primary contacts are Kevin McQuitty (916) 789-5311; Ernestine Burtley (402) 997-3601; and Mike Cassey (916) 491-3055.
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