FLOOD05850

• County: Montezuma
• Stream Name: Dolores River
• Basin: San Juan/Dolores
• Title: Field Report - The Dolores River
• Date: 11/1/2001
• Prepared By: CWCB, DNR
• Floodplain - Doc Type: Floodplain Report/Masterplan

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Staff Conclusions
The CWCB staff appreciates the concerns that have been expressed by interested parties,
residents and county officials regarding the floodplain questions in the Dolores River
valley. To 'address these questions, the CWCB has performed a technical review and
offers the following conclusions:

1. The CWCB staff finds that the laO-year floodplain information as presented in
the U.S. Army Corps of Engineers (Corps) and Federal Emergency Management
Agency (FEMA) reports to be reasonable and representative of the lOO-
floodplain for the Dolores River. The Colorado Water Conservation Board
approved Resolution FPR 00-525 dated September 25, 2000 which designates the
information in said reports as the 100- year floodplain for the Dolores River. The
CWCB does not recommend that a new floodplain study be conducted for the
subject reach of the Dolores River.

2. The CWCB staffrecommends that a flood mitigation plan be prepared as part of
the reclamation plan for the gravel operations. The flood mitigati,on plan should
address the existing and post-mining areas of the floodplain; the location, type,
and size of any temporary or permanent levee systems; the location and quantity
of material stockpiles; any temporary or permanent flood protection measures;
and the county floodplain regulation requirements.

3. The CWCB was not requested to discuss or review any of the information that
may have been presented during the Colorado Mined Land Reclamation Board
hearings. Therefore, this technical review only addresses the floodplain issues
'related to the gravel mining sites in question. The CWCB will not address topics
such as water quality, fish and wildlife habitat, sedimentation, and aesthetics.