Larimer County Law Enforcement is proposing a public safety radio facility to be built on the summit of Middle Bald Mountain. The facility would consist of a 60' tower, a 108 square foot modular building and an outdoor mounted standby diesel generator.
For comparison, a similar site (Bull Mountain) is shown below(foreground tower and building only):
Final design characteristics will not be known until the County reviews any conditions resulting from the USFS / National Environmental Protection Act (NEPA) evaluation process.
Middle Bald Mountain is located approximately 40 miles northwest of Fort Collins and approximately five miles southwest of the Red Feather Lakes area in the NE1/4 of the NE1/4 of Section 9, Township 9 North, Range 74 West. lat/long 40-45-56.5 N 105-42-27.0 W. The summit of Middle Bald Mountain, approximately 10,900 feet above sea level, is accessible via the Killpecker Creek Trail. The nearest motorized access is within approximately 1/4-mile of the summit on low-standard National Forest System Road 517 (NFSR 517).
Poor public safety radio communications has been an issue in the Poudre Canyon, and the mountainous portion of Larimer County for many years. This facility will be designed to address this deficiency and provide increased radio communications coverage for emergency personnel and law enforcement agencies.
The criteria used to identify a possible communications facility are:
Middle Bald Mountain meets all these criteria. Middle Bald was not the County's preferred choice however. It is actually the third choice. The first and second choices (South Bald Mtn and the unnamed peak directly east) are both in an inventoried roadless area. Larimer County submitted a proposal to the USFS for a facility on South Bald Mountain, which would provide the best coverage, in early 2003. This proposal was rejected at first level screening due to the roadless area rule in effect at the time.
Because of the nature of the approval process an exact cost is difficult to determine. A typical site like the one pictured above, including tower, shelter, generator and all radio electronics costs approximately $500k. Cost considerations for a site on Middle Bald Mountain would include road construction, power line construction, any special civil engineering costs for tower or shelter construction due to difficult terrain or conditions specified by the USFS.
Typical power lines (poles) cost about $35,000 per mile. Buried power lines cost $212,000 per mile or more depending on difficulty or terrain and how much blasting may be required. The shortest distance to available power is about 6 miles. The longest distance is about 12 miles. So, power line costs could run between $210,000 and $2,544,000 depending on what power line method and routing is specified by the USFS.
No navigation light is required for a tower this size.
The 60 foot tower height is based on standard design criteria. In accordance with FCC guidelines the lowest radiating antenna needs to be 30 feet above ground. A vertical separation of 20' minimum is needed between the 800 Mhz transmit and receive antennas. This brings the tower to 50'. An additional 10' is added for other antennas (VHF paging, voice, etc.) for a total of 60'. The tower height can be reduced with more detailed engineering if the facility is approved for construction.
There is no satellite based system available now or in the foreseeable future that will provide the same reliability, coverage, interoperability and economy as terrestrial based land mobile radio. Satellite systems such as Sirius use space based transmitters emitting about 2 million watts of power to reach terrestrial receivers. Even then the signal cannot penetrate buildings or vehicles. Some good resources relating to satellite radio can be found on the Satellite Industry Associations resource page. Especially relevant is the First responder's Guide.
The County looked at that possibility. It would take at least five communications sites in the canyon to provide the same coverage as Middle Bald Mountain. At a basic cost of $500k this comes to $2.5 million. With the unknown costs for power, land acquisition, civil engineering and construction, NEPA process, etc and the difficulty of getting these sites approved in Colorado's only wild and scenic river, this option is not practical. The ongoing support, maintenance and replacement costs for multiple sites would also be greater than for one central site.
"What Will Power Lines Cost? - Typical power lines (poles) cost about $35,000 per mile. Buried power lines cost $212,000 per mile or more depending on difficulty or terrain and how much blasting may be required."
The cost in a March 2008 estimate from REA was $70,000 per mile, not $35,000 per mile as stated in the Q&A. Which is correct?
Answer: Larimer County spokes with the Poudre Valley Rural Electric Association, PVREA, who worked on this during the National Environmental Policy Act, NEPA, process. They said:
Typical power lines (single-phase power wiring and poles which we would use) cost about $37,000 per mile, according to the Poudre Valley Rural Electric Authority (PVREA) cost model for 2009. To install power lines over very, very rough terrain with three-phase power wire and poles, (which we don't use) could drive the cost up $70,000 per mile. Buried power lines cost $212,000 per mile or more depending on difficulty or terrain and how much blasting may be required. The shortest distance to available power is about 6 miles. The longest distance is about 12 miles. So, cost estimates for power line installation could run between $222,000 and $2,544,000 depending on what power line method and routing is specified by the USFS.
However, since several of the sites required to cover the Poudre canyon would need to be built on USFS lands the USFS felt that the Wild and Scenic River designation, although not regulatory in this circumstance, would lead to opposition by environmental interests due to concerns about the view sheds and other natural amenities in this wild and scenic corridor.