HomeMy WebLinkAbout3.3.4 Traffic StudyLevel 2 Auxiliary Turn
Lane Assessment
For
Oil and Gas Operation Area GV 82-5
Garfield County, Colorado
September 2009
PREPARED FOR:
Williams Production RMT
1058 County Road 215
Parachute, CO 81635
970-263-2574
Contact: Bryan Hotard
PREPARED BY:
Drexel, Barrell & Co.
1350 17th Street, Suite 210
Denver, CO 80202
720-214-0955
Contact: Ann Bowers, PE, PTOE
Drexel Sorrell Project Number: D 1049
Transportation Impact Study
Oil and Gas Operation Area GV 82-5
Table of Contents
1.0 Project Description 3
2.0 Existing Conditions 4
3.0 Project Generated Traffic and Trip Distribution 7
4.0 Total Traffic Projections 10
5.0 Recommendations 12
6.0 Conclusions 13
Tables and Figures
Figure 1: 2009 Existing Traffic Count 6
Figure 2: Project -Generated Traffic Assignment 9
Figure 3: 2010 Total Traffic Volumes 11
Table 1: Anticipated Site Generated Traffic During the Fracing Process 7
Appendices
Traffic Counts (Made by Cutting Edge Traffic dated 9/15/2009 - 9/16/2009)
Background Information
Site Traffic Estimates Provide by Williams
1.0 Project Description
This Auxiliary Turn Lane Assessment examines the effects of project -generated
traffic on the roadway system for a Williams Production well pad site taking
access from Garfield County Road 309. This location is designated by
Williams as Oil and Gas Operation Area GV 82-5. This analysis includes
impacts for the projected build -out Year 2010.
This site is a parcel located north and west of County Road 309 within
Garfield County. This site currently has a single access approximately 1.5
miles from the start of County Road 309. This is expected to remain the sole
access for the proposed production facilities.
Vicinity and Zoning Map for the Well Site:
(Not to scale)
Oil and Gas Operation Area GV 82-5, 01049 Page 3
H:\D 1049\Reports\Tratric\D 1049 TIS.doc September 2009
2.0 Existing Conditions
The roadways within the vicinity of the project are detailed below:
County Road 309 (Rullison-Parachute Road): This two-lane, generally east -
west roadway travels between Battlement Mesa Parkway and County Road
323. County Road 323 then provides access to Interstate 70, Exit 81. CR 309
runs to the south of the oil and gas operation area, and is the primary access
for this facility to the public roadway system. The posted speed limit is 35
mph.
Oil and Gas Operation Area GV 82-5, D1049 Page 4
H:\D 1049\Reports\Traffic\D 1049 TIS.doc September 2009
2.1 Existing Traffic Volumes
Existing directional traffic volumes were collected on County Road 309 near
the existing site access. These counts were collected on Tuesday, September
15th, 2009 through Wednesday, September 16th. The two day average at this
location was 453 vehicles per day. The resulting AM and PM weekday peak
hour traffic at this location can be seen in Figure 1.
011 and Gas Operation Area GV 82-5, 01049 Page 5
HAD 1049 \ Reports \ Traffic \ D1049 TlS.doc September 2009
Figure J: Year 2009 Existing Traffic Volumes
Drexel, Barrell & Co.
1800 38th Street
3 5 71h Street
1350 17th Street, Suite 210
123 N 71h Street
6513 W 41h Street
2955 Villoge Drive, Suite 12
Boulder. CO 80301
Colorodo Springs, CO 80905
Denver, CO 80202
Grund Junction, CO 61501
Greeley, CO 80634
Steamboat 5prinas, CO 80488
NORTH
(NTS
LEGEND:
AM / PM )turning movement counts) XX / YY
Turning Movements
Oil and Gas Operationol Area GV 82-5
Garfield County, Colorodo
September 22. 2039
3.0 Project Generated Traffic and Trip Distribution
3.1 Trip Generation
As this type of development does not conform to any published Institute of
Transportation land use types, Williams Production was asked to assist in
determining the traffic impact that this site would be expected to add to the
existing roadway system. The data as provided by Williams can be seen in
the Appendix.
There are two phases of development that would be expected to have
impacts on fhe roadway system. The first would be the initial drilling of the
sixteen wells on the site. The second is fhe fracing process typical of
production wells in this region.
In many situations, the fracing process is typically the more traffic intensive
portion of the production process, primarily due to the large amounts of
water needed to perform this task. However, this operational area has
access to on-site water; therefore the drilling portion of well development is
likely to be the more traffic intensive. Per estimates from Williams, the drilling
of sixteen wells would be expected to generate a total of 2,724 one-way trips
over the course of a 160 day period. The fracing process for these same wells
would be expected to generate a total of 2,048 one-way trips over the
course of an additional 160 days. Averaged, the drilling process is assumed
to generate 17 (rips per day, while the fracing process will generate 13 trips
per day. Given this, the remaining analysis will focus on the traffic generated
by the drilling process rather than the subsequent tracing phase.
The following Table 1 illustrates the expected trips generated during this
process on a typical day:
Table 1 - Anticipated Site Generated Traffic During the Drilling Process
Trips per
AM Peak Hour Trips
PM Peak Hour Trips
Day
In
Out
In
Out
Rig Crew
4
1
1
1
1
Drill Bit/Tool Delivery
2
1
Mechanics
1
1
Water Truck
6
1
1
1
1
Fuel Truck
2
1
1
Cement Trucks
2
1
1
Total
17
5
2
2
5
There are likely to be days, such as when drilling rigs are being moved, when
trip generation may be significantly higher. However, these periods should
not be representative of typical conditions expected at the site.
Oit and Gas Operation Area GV 82-5, D1049 Page 7
HAD 1049\Reports \ Traffic \D 1049 AS.doc September 2009
3.2 Project Trip Distribution
Per conversation with Williams, it is expected that all traffic related to this site
will come from and go to the east on County Road 309, avoiding travel
through the Town of Parachute.
3.3 Project Trip Assignment
The anticipated assignment of peak hour project -generated traffic onto the
existing roadway network is illustrated in Figure 2.
Oil and Gas Operation Area GV 82-5, D1049 Page 8
H \D 1049\Reports\Traffic\D 1049 TIS.doc September 2009
Figure 2: Site -Generated Traffic Volumes
r,
Drexel, Barrell & Co.
1800 38th Street
3 S 7th Street
1350 17th Street, Suite 210
123 IJ 71h Street
6513 W 4th Street
2955 Village Drive, Suite 14
Boulder, CO 80301
Colorado Springs, CO 80905
Denver, CO 80202
Grand Junction, CO 81501
Greeley. CO 80634
Steamboat Springs, CO 80438
NORTH
(NTS
LEGEND :
AM / PM )turning movement counts) XX / YY
Turning Movements
f ro.
Oil and Gas Operational Area GV 82-5
Garfield County, Colorado
September 22, 2009
4.0 Total Traffic Projections
The existing peak hour traffic volumes were added to the project -generated
traffic to develop total traffic volumes. The Year 2010 Total traffic volumes
are shown in Figure 3.
Or! and Gas Operation Area GV 82-5, D W49 Page 10
H:\D 1049\Reports\Traffic\DI049 TIS.doc September 2009
Figure 3: Year 2010 Total Traffic Volumes
āvā
Drexel, Barrell & Co.
1800 381h Street
3 5 71h Street
1350 17th Street. Suite 210
123 N 71h Slreel
6513 W 4th Street
2955 Villoge Drive. Suite 14
Boulder, CO 80301
Colorado Springs, CO 80905
Denver, CO 80202
Grand Junction. CO 81501
Greeley. CO 80634
Steamboat Springs, CO 80488
NORTH
(NTS
LEGEND:
AM / PM turning movement counts) XX / YY
Turning Movements
f r'
Oil and Gas Operational Area GV B25
Garfield County, Colorado
September 22, 2009
5.0 Recommendations
5.1 Auxiliary Turn Lane Analysis
It does not appear that either the County has specific criteria for when an
auxiliary turn lane is required. Without specific criteria, it is common practice
to compare projected volumes to the criteria laid out in Section 3 of the
State of Colorado's State Highway Access Code, 2002 (Access Code). While
the criteria of this Code are primarily intended for roadways of regional or
statewide significance, it can provide some general guidance on the
desirability of turn lanes at a given location.
As can be seen in Figure 2, the highest expected hourly inbound traffic
volume at the proposed site access is 5 vph. Assuming that the most
applicable assignment of County Road 309 within the Access Code would
be Rural Highway (R -B) with a speed limit of 35 mph, the left turn lane warrant
criteria for this access is 10 vph. Given that all Williams traffic is expected to
come from the east, no inbound left turning vehicles are expected. The
warrant for a right turn lane is 25 vph. The highest anticipated peak hour
usage of this movement is 5 vph. From a strictly volume perspective, no turn
lanes should be needed.
The Access Code also includes a methodology of analysis that factors the
effect of heavy vehicles at an access point (Section 2.3(4)(e)) in which each
heavy vehicle should be treated as 3 passenger cars. Considering a
theoretical 100% heavy vehicle percentage, the right turn would not be
expected to observe more than 5 x 3 = 15 passenger car equivalents during
the peak hour. As this is the only anticipated inbound movement, no turn
lanes should be required at the site access.
6.0 Conclusions
The proposed site access should function well under typical operating
conditions without any capacity improvements to County Road 309.
This development would be expected to contribute a small increase in traffic
on County Road 309. Over the two days of counting, County Road 309
experienced an average of 435 vehicles per day. An addition of 17 vehicles
per day as projected for this site would constitute a 3.9% increase in traffic
volume.
The transportation network in the vicinity of Oil and Gas Operation Area GV
82-5 can accommodate the addition of project -generated traffic.
Oil and Gas Operation Area GV 82-5, D 1049 Page 13
H:\D1049\Reports\Traffic\D1049 PS. doc September 2009
Appendix:
Traffic Counts
Tuesday September 15, 2009 through Wednesday, September 16th,
2009
County Road 309 Near Existing Site Access
Oil and Gas Operation Area GV 82-5, D1049 Page 14
HAD! 049 \ Reports \Traffic \D 1049 TIS.doc September 2009
Navjoy Consulting Services, Inc. Page 1
1385 S Colorado Blvd Suite A-707
Denver, CO 80222 Site Code: 2
303-502-7343 Station ID: 2
CR 309
Start 15 -Sep -0
Time Tue EB WB Total
12:00 AM 1 1 2
01:00 1 1 2
02:00 1 0 1
03:00 2 2 4
04:00 1 7 8
05:00 15 1 16
06:00 7 9 16
07:00 14 11 25
08:00 13 15 28
09:00 15 8 23
10:00 14 8 22
11:00 12 23 35
12:00 PM 8 15 23
01:00 18 19 37
02:00 11 10 21
03:00 11 26 37
04:00 14 26 40
05:00 10 15 25
06:00 5 18 23
07:00 7 10 17
08:00 2 7 9
09:00 4 3 7
10:00 2 4 6
11:00 2 3 5
Total 190 242 432
Percent 44.0% 56.0%
AM Peak 05:00 11:00 11:00
Vol. 15 23 35
PM Peak 13:00 15:00 16:00
Vol. 18 26 40
Navjoy Consulting Services, Inc. Page 2
1385 S Colorado Blvd Suite A-707
Denver, CO 80222 Site Code: 2
303-502-7343 Station ID: 2
CR 309
Start 16 -Sep -0
Time Wed EB WB Total
12:00 AM 0 0 0
01:00 0 0 0
02:00 1 1 2
03:00 3 2 5
04:00 2 0 2
05:00 12 0 12
06:00 2 6 8
07:00 13 9 22
08:00 20 15 35
09:00 11 15 26
10:00 17 16 33
11:00 11 11 22
12:00 PM 16 17 33
01:00 13 18 31
02:00 18 29 47
03:00 12 22 34
04:00 13 32 45
05:00 9 23 32
06:00 5 24 29
07:00 10 7 17
08:00 4 17 21
09:00 4 8 12
10:00 0 3 3
11:00 0 2 2
Total 196 277 473
Percent 41.4% 58.6%
AM Peak 08:00 10:00 08:00
Vol. 20 16 35
PM Peak 14:00 16:00 14:00
Vol. 18 32 47
Grand 386 519
Total 905
Percent 42.7% 57.3%
ADT Not Calculated
Appendix:
Background Information
Site Traffic Estimates Provide by Williams
Oil and Gas Operation Area GV 82-5, D 1049 Page 15
H:\D 1049\Reports\Traffic\D 1049 T1S.doc September 2009
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