Environmental News
Environmental News from Boulder, Colorado
City, county, state declare war on Emerald Ash Borer
Nov 13th
Firewood is a main culprit
The Colorado Department of Agriculture (CDA) today issued an emergency quarantine in the Boulder County area related to the recent discovery of the Emerald Ash Borer (EAB) beetle in Boulder in late September. The quarantine is effective immediately.
“Our urban trees provide enormous environmental, economic and social benefits to our community, and ash trees contribute greatly to our urban tree canopy,” said City Forester Kathleen Alexander. “We are currently developing a plan to minimize the impact of the highly destructive Emerald Ash Borer to the city of Boulder, and the quarantine is an important step to limit the infestation and slow the spread, which allows other Front Range communities time to prepare.”
The emergency quarantine prohibits the sale and/or movement of all plants and plant parts of ash trees, including but not limited to:
· Logs and green lumber
· Nursery stock
· Chips and mulch, either composted or uncomposted
· Stumps, roots and branches
· Firewood of any non-coniferous (hardwood) species (Because ash is difficult to distinguish from other hardwood species when cut into firewood, the quarantine is for all hardwood firewood.)
The following areas are included in the emergency quarantine:
· Boulder County
· The entire town of Erie
· The area extending east from Boulder County to the south including Highway 7, to the north including Highway 52 and to the east including Weld County Road 7
· Highway 93 extending south from the Boulder County line to the entrance of Republic Landfill, including the entire landfill property, and including the entire property at 11218 Highway 93 on which the business of the Singing Saw Woodworks is operated
· The 15-acre, fenced Community Sort Yard located at 8200 Highway 7 in Allenspark, on the Boulder/Larimer county line
Quarantined items may be transported within the quarantined area but may not be moved outside its borders without specific authorization from the commissioner of agriculture or the United States Department of Agriculture. Any person violating this quarantine is subject to civil penalties up to $1,000 per violation. The full text of the quarantine, including additional restrictions, can be found at www.EABcolorado.com.
EAB in Colorado
A suspect ash tree was spotted in Boulder County on Sept. 23 by City of Boulder’s Forestry staff. Insect specimens from the ash tree, located near the intersection of 30th and Iris, were collected and sent to the United States Department of Agriculture (USDA) Systematic Entomology Laboratory, where the identity of the insects was confirmed. The confirmation of EAB in Colorado marks the western-most occurrence of this invasive pest in North America. Colorado is the fourth state to detect EAB in 2013.
Ash trees are popular in Colorado with an estimated more than 90,000 in the city of Boulder alone; the Denver metro area has an estimated 1.45 million ash trees.
EAB general information
EAB is an invasive insect that has been responsible for the death or decline of more than 50 million ash trees in 21 states. It is a small, green metallic beetle, originally from Asia, first detected in North America in 2002 in southeastern Michigan. The emerald ash borer attacks only ash trees and all ash species – including green, white, black and blue – are at risk. Signs of emerald ash borer infestation include a general decline in the appearance of the tree, thinning of upper branches and twigs, loss of leaves, and serpentine tunnels produced by EAB larvae under the bark. Woodpeckers may often be observed removing the bark of infested trees to access the larvae.
It is possible that EAB could infest an ash tree for three or four years before visible signs of decline of the tree. If you suspect your ash tree maybe infested with EAB, residents are encouraged to have it inspected by a city of Boulder licensed certified arborist , contact CDA at 888-248-5535, or the City of Boulder Forestry office at 303-441-4406. Infestation signs include:
· Sparse leaves or branches in the upper part of the tree
· D-shaped exit holes about 1/8 inch wide
· New sprouts on the lower trunk or lower branches
· Vertical splits in the bark
· Winding S-shaped tunnels under the bark
· Increased woodpecker activity
How You Can Help
“The public can play a vital role in preventing the spread of this destructive bug by simply not moving firewood,” said Mitch Yergert, CDA’s Plant Inspection Division director. “EAB larvae can survive underneath the bark of ash firewood, and when it’s moved from one place to another, the pest can hitchhike to a new location. Furthermore, it’s important to note that trees begin to decline a bit during fall months but there are certain features of an EAB-infested tree that residents can look for.”
Emergency Quarantine Issued to Protect Colorado Ash Trees in Boulder County, parts of Larimer, Jefferson, Weld Counties
Boulder County, Colo. – The Colorado Department of Agriculture has established an emergency quarantine in and around Boulder County including parts of southern Larimer, western Weld and northern Jefferson Counties (see quarantine map) related to the recent discovery of the Emerald Ash Borer (EAB). The quarantine is effective immediately. Boulder County is working with the Colorado Department of Agriculture, the City of Boulder, and other affected entities to address the quarantine and plan for the potential impacts of the EAB in Boulder County.
“We have cooperated with the state on the implementation of the temporary quarantine and will continue to work to understand the potential impacts of the EAB in Boulder County,” said Boulder County Commissioner Elise Jones. “Boulder County, in conjunction with the state and affected local partners, has begun to develop a response plan that will outline potential actions on county owned lands and provide guidance for private residents.”
The emergency quarantine prohibits the sale and/or movement of all plants and plant parts of the genus Fraxinus, including but not limited to:
· Logs and green lumber
· Nursery stock, scion wood, and bud wood
· Chips and mulch, either composted or uncomposted
· Stumps, roots and branches
· Firewood of any non-coniferous (hardwood) species
Quarantined items may be transported within the quarantined area but may not be moved outside its borders without specific authorization from the Commissioner of Agriculture or the United States Department of Agriculture.
Quarantined items can be transported within the quarantined area to:
· Denver Regional Landfill, 1441 Weld County Road 6, Erie
· Front Range Landfill, 1830 Weld County Road 5, Erie
· Republic Landfill, 8900 Colorado Highway 93, Golden
Residents participating in Boulder County operated flood-debris removal programs, including curbside debris collection do not have to take any special steps to maintain compliance with the quarantine. Debris collected by Boulder County is being treated and transported according to the requirements of the quarantine.
Any person violating this quarantine is subject to civil penalties up to $1000 per violation. The full text of the quarantine, including additional restrictions, can be found at www.EABcolorado.com.
If you think you have EAB in your ash trees, or if you have any questions or concerns, or would like additional information, please contact the CSU Extension in Longmont at 303-678-6238, email EAB@BoulderCounty.org or visit www.bouldercounty.org/property/forest/Pages/eab.aspx.
Boulder’s energy future is brighter
Nov 6th
Municipalization ballot measure 2E passing by significant margin, 310 failing
City outlines implications for possible creation of electric utility
City outlines implications for possible creation of electric utility
While some votes remain to be counted tonight, ballot measure 2E appears headed for a significant victory with a competing ballot measure 310 poised for defeat.
The approval of measure 2E, pending final results, will give the city flexibility in moving forward with the initial 2011 voter-approved path toward exploring the creation of a local electric utility while also recognizing concerns about unforeseen costs and customer representation. Specifically, measure 2E puts a limit on the amount the city can pay to acquire the system and clarifies some out-of-city service issues. The ballot measure includes the following:
- Setting a limit of $214 million for acquisition of Xcel’s assets and stranded costs, if stranded costs are paid in one lump sum.
- Allowing out-of-city customers, if any are included, to serve on the advisory board of a potential local electric utility.
- Facilitating utility choice on a neighborhood-by-neighborhood basis to potential out-of-city customers.
- Requiring rates of out-of-city customers to be the same as those in the same class of in-city customers.
- Limiting brokerage fees associated with acquiring debt to industry standards.
These requirements are in addition to criteria passed by voters as part of the Charter in 2011. These are:
- Rates must be equal or less than those offered by Xcel Energy at the time of acquisition.
- The utility must have sufficient revenue to cover operating costs and debt, plus carry a reserve of 25 percent of the debt amount, referred to as “Debt Service Coverage Ratio.”
- Reliability must remain comparable to that being offered by Xcel Energy.
- There must be a plan to increase renewable energy in the supply.
- There must be a plan to decrease greenhouse gas emissions that result from a fossil-fuel based electricity supply.
The original 2011 voter-approved Charter language on municipalization can be found at –http://www.colocode.com/boulder2/charter_articleXIII.htm. The provisions in 2E will be added to the existing Charter requirements.
“We are pleased with the results of today’s election concerning the municipalization ballot items,” said Heather Bailey, executive director of energy strategy and electric utility development. “The additional requirements set by 2E will address concerns about the unknown amounts of acquisition and stranded costs associated with forming a local utility and help define the path the community would like us to take towards creating the electric utility of the future right here in Boulder.”
The next steps in the municipalization exploration study will focus on the negotiation and acquisition process associated with obtaining the infrastructure the city would need to operate a safe and reliable local electric utility.
All information related to Boulder’s Energy Future and the municipalization study is available atwww.BoulderEnergyFuture.com.
–CITY–
Climate change could dry up Salt Lake City watersheds
Nov 1st
New study: Rising temperatures
challenge Salt Lake City’s water supply
challenge Salt Lake City’s water supply
In an example of the challenges water-strapped Western cities will face in a warming world, new research shows that every degree Fahrenheit of warming in the Salt Lake City region could mean a 1.8 to 6.5 percent drop in the annual flow of streams that provide water to the city.
By midcentury, warming Western temperatures may mean that some of the creeks and streams that help slake Salt Lake City’s thirst will dry up several weeks earlier in the summer and fall, according to the new paper, published today in the journal Earth Interactions. The findings may help regional planners make choices about long-term investments, including water storage and even land-protection policies.
Dell Creek in Parley’s Canyon, is a source of water for Salt Lake City. A new study shows how climate change is likely to affect the various creeks and streams that help slake Salt Lake City’s thirst.
“Many Western water suppliers are aware that climate change will have impacts, but they don’t have detailed information that can help them plan for the future,” said lead author Tim Bardsley, with NOAA’s Cooperative Institute for Research in Environmental Sciences (CIRES) at the University of Colorado Boulder. “Because our research team included hydrologists, climate scientists and water utility experts, we could dig into the issues that mattered most to the operators responsible for making sure clean water flows through taps and sprinklers without interruption.”
Bardsley works for the CIRES Western Water Assessment, from the NOAA Colorado Basin River Forecast Center in Salt Lake City. For the new paper, he worked closely with colleagues from the city’s water utility, the National Center for Atmospheric Research (NCAR), NOAA’s Earth System Research Laboratory and the University of Utah.
The team relied on climate model projections of temperature and precipitation in the area, historical data analysis and a detailed understanding of the region from which the city utility obtains water. The study also used NOAA streamflow forecasting models that provide information for Salt Lake City’s current water operations and management.
The picture that emerged was similar, in some ways, to previous research on the water in the Interior West: Warmer temperatures alone will cause more of the region’s precipitation to fall as rain than snow, leading to earlier runoff and less water in creeks and streams in the late summer and fall.
“Many snow-dependent regions follow a consistent pattern in responding to warming, but it’s important to drill down further to understand the sensitivity of watersheds that matter for individual water supply systems,” said NCAR’s Andy Wood, a co-author.
The specifics in the new analysis—which creeks are likely to be impacted most and soonest, how water sources on the nearby western flank of the Wasatch Mountains and the more distant eastern flank will fare—are critical to water managers with Salt Lake City.
“We are using the findings of this sensitivity analysis to better understand the range of impacts we might experience under climate change scenarios,” said co-author Laura Briefer, water resources manager at the Salt Lake City Department of Public Utilities. “This is the kind of tool we need to help us adapt to a changing climate, anticipate future changes and make sound water-resource decisions.”
“Water emanating from our local Wasatch Mountains is the lifeblood of the Salt Lake Valley, and is vulnerable to the projected changes in climate,” said Salt Lake City Mayor Ralph Becker. “This study, along with other climate adaptation work Salt Lake City is doing, helps us plan to be a more resilient community in a time of climate change.”
Among the details in the new assessment:
- Temperatures are already rising in northern Utah, about 2 degrees Fahrenheit in the last century, and continue to climb. Summer temperatures have increased especially steeply and are expected to continue to do so. Increasing temperatures during the summer irrigation season may increase water demand.
- Every increase in a degree Fahrenheit means an average decrease of 3.8 percent in annual water flow from watersheds used by Salt Lake City. This means less water available from Salt Lake City’s watersheds in the future.
- Lower-elevation streams are more sensitive to increasing temperatures, especially from May through September, and city water experts may need to rely on less-sensitive, higher-elevation sources in late summer, or more water storage.
- Models tell an uncertain story about total future precipitation in the region, primarily because Utah is on the boundary of the Southwest (projected to dry) and the U.S. northern tier states (projected to get wetter).
- Overall, models suggest increased winter flows, when water demand is lower, and decreased summer flows when water demand peaks.
- Annual precipitation would need to increase by about 10 percent to counteract the stream-drying effect of a 5-degree increase in temperature.
- A 5-degree temperature increase would also mean that peak water flow in the western Wasatch creeks would occur two to four weeks earlier in the summer than it does today. This earlier stream runoff will make it more difficult to meet water demand as the summer irrigation season progresses.
Authors of the new paper, “Planning for an Uncertain Future: Climate Change Sensitivity Assessment Toward Adaptation Planning for Public Water Supply,” are Tim Bardsley, CIRES Western Water Assessment; Andrew Wood, NCAR and formerly of NOAA’s Colorado Basin River Forecast Center; Mike Hobbins, NOAA’s Earth System Research Laboratory, and formerly NOAA’s Colorado Basin River Forecast Center; Tracie Kirkham, Laura Briefer, and Jeff Niermeyer, Salt Lake City Department of Public Utilities, Salt Lake City, Utah; and Steven Burian, University of Utah, Salt Lake City.
Earth Interactions is jointly published by the American Geophysical Union, the American Meteorological Society and the Association of American Geographers.
CIRES is a joint institute of NOAA and CU-Boulder.
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