Stories indexed with the term ‘headrace’

Action on Argo Headrace, Trails Near Fuller

Ann Arbor park advisory commission meeting (Aug. 16, 2011): During a three-hour meeting on Tuesday, park commissioners walked down several topical trails in what PAC chair Julie Grand aptly described as a “super-packed” agenda.

Argo headrace

The view looking east down the dewatered Argo headrace, with the embankment on the right. The trail along the embankment to Broadway is closed, as the city prepares for major reconstruction of the headrace. (Photos by the writer.)

Commissioners approved a resolution recommending a change to the scope of work at the Argo headrace – a change that will add a new entrance to the soon-to-be-reconstructed waterway from Argo Pond to the Huron River. The modification to the project was linked to an offer from DTE to pay for a whitewater section that’s part of the overall project, which freed up city funds for the new entrance. A state permit needed to start the reconstruction is expected to be received by Aug. 23.

A second resolution introduced at Tuesday’s meeting urged the city council to incorporate design of a trail system – including the county’s Border to Border (B2B) trail – into the Fuller Road area in advance of building the proposed Fuller Road Station. Two members of the Washtenaw Bicycling & Walking Coalition were on hand with suggestions for where trails might be located to bypass the busy intersection of Fuller Road, Maiden Lane and East Medical Center Drive.

The topic of trails also emerged tangentially during a presentation by PAC vice chair John Lawter on dog parks. Some people walk their dogs off leash on park trails and in other park areas, violating Ann Arbor’s ordinance requiring dogs to be leashed. The exception is in the city’s two dog parks, on the north and south edges of town.

Lawter suggested that Ann Arbor might find other ways to let dogs off leash, either by creating another traditional dog park that’s more centrally located, or designating certain hours for dogs to be off leash in specific parks. PAC might form a subcommittee to explore options for a new dog park, and for how to increase enforcement of existing dog-control ordinances. Such an effort might uncover more data points like those Lawter provided in his presentation, which included the pounds of poo collected annually at Swift Run dog park.

Data collection has also been part of developing the city’s first urban forest management plan. Oliver Kiley of JJR, the consultant leading this project, updated the commission on the effort. Possible outcomes include a recommended maintenance plan, protections for mature trees, targets for new tree plantings, and proposals for relevant ordinances and zoning. The discussion among commissioners led to concerns over whether the city is prepared for something similar to the emerald ash borer – which decimated thousands of trees in the city over the past decade and chewed up the city’s forestry budget for several years.

The urban forest management plan will be among the 26 city plans in a sustainability framework being developed, focused on “triple-bottom line” goals of economic vitality, environmental quality and social equity. The commission was briefed on this project in preparation for a Sept. 27 joint meeting of the park, planning, energy and environmental commissions. The goal of that meeting is to start prioritizing goals from these existing city plans. [Full Story]

PAC Recommends Change to Argo Project

At its Aug. 16, 2011 meeting, the Ann Arbor park advisory commission recommended amending the project scope with TSP Environmental for work on the Argo dam headrace.  [.pdf of staff memo and resolution]

The Livonia firm had been hired last year to build a bypass channel in the headrace for $988,170 and to add whitewater features for an additional $180,000. However, DTE is now offering to pay for the whitewater feature of the Argo dam project, if the city agrees to hold off on construction of that piece until after DTE completes remediation on its nearby property, as required by the state.

By having DTE pay for the work, the city is expected to save $163,636. The resolution approved at Tuesday’s PAC … [Full Story]

City, MDEQ Agree: Argo Headrace Shut

Argo Dam headrace closure

Argo Dam headrace closure. Without the metal plate, water would flow from left to right (bottom to top) in the photograph. The greenish metal plate is wedged into the concrete slot in shim-like fashion. The slot continues along to the bottom of the channel. (Photo by the writer).

The city of Ann Arbor and the Michigan Department of Environmental Quality have moved towards resolving a dispute about what needs to be done to address problems with the earthen embankment next to Argo Dam. Late this summer, the MDEQ had issued an order to the city to close off the flow to the headrace and dewater it by Nov. 1. That order was based on concerns about the structural integrity of the earthen berm dating back several years.

The city had retained the law firm Bodman, LLP on the matter, and filed a contested case with the MDEQ, asking for a 90-day stay on the MDEQ’s order, which includes a stoppage of flow in the headrace, and its dewatering.

The order also includes other points, among them a need for the city to make a decision on the dam-in/dam-out question. Whether to keep Argo Dam in place or remove it has been the focus of community-wide conversation on that topic, which has taken place with great intensity over the last nine months, but which has a years-long history.

The MDEQ agreed to the city’s request for a stay on all elements of its order except for shutting the water flow to the headrace. The city has now complied with the MDEQ’s order to close the headrace. [Full Story]

MDEQ to Ann Arbor: Close Argo Millrace

Likely point of closure for the headrace (millrace) at Argo Dam.

Likely point of closure for the millrace (also known as the headrace or canal) at Argo Dam. (Photo by the writer.)

As part of an intro to an interview with the chair of the Ann Arbor Park Advisory Commission, Scott Rosencrans, which The Chronicle published on Aug. 25, we reported that a letter from the Michigan Department of Environmental Quality had been sent to the city of Ann Arbor. The MDEQ letter included an order to close the millrace at Argo Dam.

The communication from the state agency didn’t come out of the blue – it was a reply to a request sent to MDEQ by the city of Ann Arbor asking for an extension to a July 31, 2009 deadline for action on Argo Dam.

With the text of both letters now available, we take a look at those communications, after briefly considering some historical context. That context dates back to a 2004 letter from the MDEQ about toe drains in the earthen berm next to the dam, and includes formation of a study committee, a public engagement process that extended over most of the first half of this year, recommendations from the city’s Park Advisory Commission and Environmental Commission, and a city council work session.

A key date from the most recent MDEQ letter is Nov. 1, 2009, by which time it has ordered the city of Ann Arbor to close off and drain the millrace. But it leaves both the dam-in and dam-out options available to the city. On a dam-in scenario, the MDEQ wants the toe drains in the earthen berm repaired by Dec. 31, 2010. On a dam-out scenario, the MDEQ wants the removal completed by December 2012. Either way, the city is supposed to have its study of options completed by April 30, 2010.

Based on a Tuesday phone conversation with Matt Naud, the city’s environmental coordinator, one possible timeline for next steps would have the city council conducting a mid-September work session on the topic, with clear direction coming at the council’s second meeting in September. Whatever that direction from council is, said Naud, it’s going to start costing money to implement the next steps – on the order of five-figure dollar amounts at least. [Full Story]