Page 21 - Beaumont Basin Watermaster
P. 21
BEAUMONT BASIN WATERMASTER
MEMORANDUM NO. 15-17
Date: August 5, 2015
From: Hannibal Blandon, ALDA
Subject: Proposed Groundwater Storage Ag reement for the Morongo Band
of Mission Indians
Recommendation: No recommendation.
On July 8, 2015, ALDA Inc. received a letter from Mr. Stephen B. Johnson, president of
Stetson Engineers Inc., on behalf of the Morongo Band of Mission Indians, regarding the
Groundwater Storage Agreement currently in place. In the letter, it was requested that
Watermaster includes the Groundwater Storage Agreement between the Watermaster
and the Tribe on the August 5, 2015 Watermaste r meeting agenda for a short presentation
to the Watermaster and potential Watermaster approval. Initial letter, technical
memorandum, and accompanying attachments are included herein.
ALDA Inc., in association with Thomas Harder & Company, have conducted an initial
review of the documents provided by Stetson Engineers Inc., and would like to offer the
following comments for your consideration. Please note that our initial comments are
based on our current knowledge of the basin only as no additional calculations or
modeling runs have been conducted.
Location of Spreading Grounds – Technical Memorandum Figures 1 and 2. –
While these figures are not provided with a scale, aerial photography seems to
indicate that the location of Tukwet Well B is approximately 600 ft. to 800 ft. south
of the Beaumont Basin Adjudicated Boundary alignment depicted in the figure.
Accordingly, the location of the proposed spreading grounds seems to be
approximately 300 ft. to 400 ft. north of the boundary. Please note that the
alignment of the Beaumont Basin boundary in this area is not a confirmed
groundwater flow barrier.
Technical Memorandum Section 6.4d, Pg. 3 of 8. – There is limited available
hydrogeological data in the vicinity of the proposed recharge site to indicate the
direction of groundwater flow in this area. If the applicant and/or their consultants
have more detailed groundwater level data in this area (including a contour map),
they should include it. Available data suggests the groundwater gradient is
relatively flat in the area. It is possible that supplemental water recharge at the
proposed location could result in groundwater mounding that would result in flow
out of the basin and increased losses. The applicant should provide an analysis
of the potential impact of recharging 700 ac-ft of water (or more) on the
Beaumont Basin Watermaster Meeting - August 5, 2015 - Page 21 of 79
MEMORANDUM NO. 15-17
Date: August 5, 2015
From: Hannibal Blandon, ALDA
Subject: Proposed Groundwater Storage Ag reement for the Morongo Band
of Mission Indians
Recommendation: No recommendation.
On July 8, 2015, ALDA Inc. received a letter from Mr. Stephen B. Johnson, president of
Stetson Engineers Inc., on behalf of the Morongo Band of Mission Indians, regarding the
Groundwater Storage Agreement currently in place. In the letter, it was requested that
Watermaster includes the Groundwater Storage Agreement between the Watermaster
and the Tribe on the August 5, 2015 Watermaste r meeting agenda for a short presentation
to the Watermaster and potential Watermaster approval. Initial letter, technical
memorandum, and accompanying attachments are included herein.
ALDA Inc., in association with Thomas Harder & Company, have conducted an initial
review of the documents provided by Stetson Engineers Inc., and would like to offer the
following comments for your consideration. Please note that our initial comments are
based on our current knowledge of the basin only as no additional calculations or
modeling runs have been conducted.
Location of Spreading Grounds – Technical Memorandum Figures 1 and 2. –
While these figures are not provided with a scale, aerial photography seems to
indicate that the location of Tukwet Well B is approximately 600 ft. to 800 ft. south
of the Beaumont Basin Adjudicated Boundary alignment depicted in the figure.
Accordingly, the location of the proposed spreading grounds seems to be
approximately 300 ft. to 400 ft. north of the boundary. Please note that the
alignment of the Beaumont Basin boundary in this area is not a confirmed
groundwater flow barrier.
Technical Memorandum Section 6.4d, Pg. 3 of 8. – There is limited available
hydrogeological data in the vicinity of the proposed recharge site to indicate the
direction of groundwater flow in this area. If the applicant and/or their consultants
have more detailed groundwater level data in this area (including a contour map),
they should include it. Available data suggests the groundwater gradient is
relatively flat in the area. It is possible that supplemental water recharge at the
proposed location could result in groundwater mounding that would result in flow
out of the basin and increased losses. The applicant should provide an analysis
of the potential impact of recharging 700 ac-ft of water (or more) on the
Beaumont Basin Watermaster Meeting - August 5, 2015 - Page 21 of 79
