The Lytton’s Rancheria’s proposal for a residential development and community center on Windsor’s west side is being opposed by Sonoma County officials concerned about possible environmental damage and inadequate water and sewage capacity.

Opponents, who face a Friday deadline for filing objections, also fear a casino could be built on the property. Tribal representatives, however, said Wednesday they have no plans for a gaming facility.

The county’s 23-page response to the plan by the Lytton Band of Pomo Indians said the project requires an environmental impact statement, which is a more detailed and more comprehensive analysis than the 718-page “environmental assessment” conducted by the tribe.

The tribe said wants to build 147 residential units, about two-thirds of them single-family homes, on 92 acres of woodlands.

While the Town of Windsor and neighborhood groups are expected to weigh in on the project under review by the Bureau of Indian Affairs, the document approved Tuesday by county supervisors forms the nexus for opposition.

Board Chairman Paul Kelley, whose north county district includes the proposed project, said the tribe’s environmental assessment shows a “lack of consequences and impacts to the neighbors, to sewer and to water.”

County officials also cited removal of 2,000 oak trees at the site, potential damage to endangered plants and species and unresolved questions regarding where residents would obtain water and sewer services as reasons for calling for a full-blown environmental impact study.

The county’s response is particularly critical of the lack of detail in the tribe’s proposal for a 4,250-square-foot banquet hall inside a 18,800-square-foot community center.

“It does not state whether the facility may be used for class I, II, or III gaming, rented for outside wedding or other special events or rented for outside conferences and business meetings,” according to the document by Jeffrey Brax, deputy county counsel.

Tribe officials said Wednesday that they could not comment on the county’s document because they hadn’t seen it. However, tribal spokesman Doug Elmets said he remains confident that water, wastewater, traffic and environmental issues will be clarified as the tribe refines its proposal.

“We will review any comments on our project and take them into consideration,” Elmets said.

He said the tribe has no plans for a casino and that the west side of Windsor is not a good location for one. Home for tribal members remain the goal of the project, he said, noting that the proposal includes an alternative of 55 residences if environmental studies do not support 147.

Kelley said that supervisors want written assurances. “I will press for a commitment to no gaming on this property,” Kelley said.

The tribe’s study serves as the basis for its application to the Bureau of Indian Affairs to take the land into trust and allow the tribe to develop the site.

The 270-member Lytton tribe has been landless since 1961 when the federal government dissolved its 50-acre Alexander Valley rancheria. However, the tribe’s lucrative investment in a San Pablo cardroom and casino has allowed it to steadily expand its land purchases west of Windsor.

In the past, Sonoma County officials have opposed use of tribal lands for gaming operations, such as in the Alexander Valley and near Rohnert Park.

However, after the Dry Creek Rancheria tribe received federal approval for its River Rock Casino near Geyserville, county officials focused on securing long-term agreements that casino revenues compensate the county for police, fire and other public services attributable to the development.